การจัดเก็บรายการ RecyclerView ด้วย SQLite

build.gradle (Project: MyApplication)

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
        

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://jitpack.io' }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

repositories {

google()

jcenter()

}

dependencies {

classpath 'com.android.tools.build:gradle:3.1.4'

// NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

}

allprojects {

repositories {

google()

jcenter()

maven { url 'https://jitpack.io' }

}

task clean(type: Delete) {

delete rootProject.buildDir

}

build.gradle (Module: app)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.phaisarn.myapplication"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:design:26.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.android.support:cardview-v7:25.3.1'
    implementation 'com.github.vansikrishna:Multimager:1.0.6'
}

apply plugin: 'com.android.application'

android {

compileSdkVersion 26

defaultConfig {

applicationId "com.phaisarn.myapplication"

minSdkVersion 21

targetSdkVersion 26

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

dependencies {

implementation fileTree(dir: 'libs', include: ['*.jar'])

implementation 'com.android.support:appcompat-v7:26.1.0'

implementation 'com.android.support.constraint:constraint-layout:1.1.3'

implementation 'com.android.support:design:26.1.0'

testImplementation 'junit:junit:4.12'

androidTestImplementation 'com.android.support.test:runner:1.0.2'

androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

implementation 'com.android.support:cardview-v7:25.3.1'

implementation 'com.github.vansikrishna:Multimager:1.0.6'

}

drawable/border.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="1dp"
        android:color="#777" />
</shape>

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"

android:shape="rectangle">

<stroke

android:width="1dp"

android:color="#777" />

</shape>

values/styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

    <style name="TextStyle">
        <item name="android:textSize">16sp</item>
        <item name="android:layout_marginLeft">5dp</item>
    </style>

    <style name="EditStyle">
        <item name="android:padding">3dp</item>
        <item name="android:textSize">16sp</item>
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_margin">5dp</item>
        <item name="android:background">@drawable/border</item>
        <item name="android:lines">1</item>
        <item name="android:gravity">top</item>
    </style>
</resources>

<item name="colorPrimary">@color/colorPrimary</item>

<item name="colorPrimaryDark">@color/colorPrimaryDark</item>

<item name="colorAccent">@color/colorAccent</item>

</style>

<item name="windowActionBar">false</item>

</style>

</style>

<item name="android:layout_width">match_parent</item>

<item name="android:background">@drawable/border</item>

</style>

</resources>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@drawable/ic_add" />

</android.support.design.widget.CoordinatorLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<android.support.design.widget.AppBarLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar

android:id="@+id/toolbar"

android:layout_width="match_parent"

android:layout_height="?attr/actionBarSize"

android:background="?attr/colorPrimary"

app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<android.support.design.widget.FloatingActionButton

android:id="@+id/fab"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="bottom|end"

android:layout_margin="@dimen/fab_margin"

app:srcCompat="@drawable/ic_add" />

</android.support.design.widget.CoordinatorLayout>

content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#def"
    android:gravity="center_horizontal"
    android:paddingTop="10dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/activity_main">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

    </android.support.v7.widget.RecyclerView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#def"

android:gravity="center_horizontal"

android:paddingTop="10dp"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

tools:context=".MainActivity"

tools:showIn="@layout/activity_main">

<android.support.v7.widget.RecyclerView

android:id="@+id/recycler_view"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

</android.support.v7.widget.RecyclerView>

</LinearLayout>

item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="10dp"
    android:layout_marginLeft="15dp"
    android:layout_marginRight="15dp"
    android:layout_marginTop="10dp"
    app:cardBackgroundColor="#fafafa"
    app:cardCornerRadius="5dp"
    app:cardElevation="5dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?android:attr/selectableItemBackground"
        android:orientation="vertical"
        android:padding="15dp">

        <ImageView
            android:id="@+id/image_view"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center_horizontal" />

        <TextView
            android:id="@+id/text_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="5dp"
            android:textSize="18sp" />
    </LinearLayout>
</android.support.v7.widget.CardView>

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginBottom="10dp"

android:layout_marginLeft="15dp"

android:layout_marginRight="15dp"

android:layout_marginTop="10dp"

app:cardBackgroundColor="#fafafa"

app:cardCornerRadius="5dp"

app:cardElevation="5dp">

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="?android:attr/selectableItemBackground"

android:orientation="vertical"

android:padding="15dp">

<ImageView

android:id="@+id/image_view"

android:layout_width="100dp"

android:layout_height="50dp"

android:layout_gravity="center_horizontal" />

<TextView

android:id="@+id/text_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center_horizontal"

android:layout_marginTop="5dp"

android:textSize="18sp" />

</LinearLayout>

</android.support.v7.widget.CardView>

activity_add_product.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AddProductActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_add_product" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".AddProductActivity">

<android.support.design.widget.AppBarLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar

android:id="@+id/toolbar"

android:layout_width="match_parent"

android:layout_height="?attr/actionBarSize"

android:background="?attr/colorPrimary"

app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<android.support.design.widget.FloatingActionButton

android:id="@+id/fab"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="bottom|end"

android:layout_margin="@dimen/fab_margin"

app:srcCompat="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

content_add_product.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".AddProductActivity"
    tools:showIn="@layout/activity_add_product">

    <GridLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="16dp">

        <ImageView
            android:id="@+id/image_view"
            android:layout_width="400dp"
            android:layout_height="200dp"
            android:scaleType="centerCrop"
            android:visibility="gone" />

        <Button
            android:id="@+id/button_image"
            android:text="เลือกภาพ" />

        <TextView
            style="@style/TextStyle"
            android:text="ชื่อสินค้า" />

        <EditText
            android:id="@+id/edit_name"
            style="@style/EditStyle" />

        <TextView
            style="@style/TextStyle"
            android:text="ราคา" />

        <EditText
            android:id="@+id/edit_price"
            style="@style/EditStyle"
            android:inputType="number" />

        <TextView
            style="@style/TextStyle"
            android:text="ลักษณะสินค้า (แยกเป็นข้อๆ)" />

        <EditText
            android:id="@+id/edit_char1"
            style="@style/EditStyle" />

        <EditText
            android:id="@+id/edit_char2"
            style="@style/EditStyle" />

        <EditText
            android:id="@+id/edit_char3"
            style="@style/EditStyle" />

        <EditText
            android:id="@+id/edit_char4"
            style="@style/EditStyle" />

        <EditText
            android:id="@+id/edit_char5"
            style="@style/EditStyle" />

        <Button
            android:id="@+id/button_save"
            android:text="บันทึกข้อมูล" />
    </GridLayout>

</android.support.v4.widget.NestedScrollView>

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

tools:context=".AddProductActivity"

tools:showIn="@layout/activity_add_product">

<GridLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:padding="16dp">

<ImageView

android:id="@+id/image_view"

android:layout_width="400dp"

android:layout_height="200dp"

android:scaleType="centerCrop"

android:visibility="gone" />

<Button

android:id="@+id/button_image"

android:text="เลือกภาพ" />

<TextView

style="@style/TextStyle"

android:text="ชื่อสินค้า" />

<EditText

android:id="@+id/edit_name"

style="@style/EditStyle" />

<TextView

style="@style/TextStyle"

android:text="ราคา" />

<EditText

android:id="@+id/edit_price"

style="@style/EditStyle"

android:inputType="number" />

<TextView

style="@style/TextStyle"

android:text="ลักษณะสินค้า (แยกเป็นข้อๆ)" />

<EditText

android:id="@+id/edit_char1"

style="@style/EditStyle" />

<EditText

android:id="@+id/edit_char2"

style="@style/EditStyle" />

<EditText

android:id="@+id/edit_char3"

style="@style/EditStyle" />

<EditText

android:id="@+id/edit_char4"

style="@style/EditStyle" />

<EditText

android:id="@+id/edit_char5"

style="@style/EditStyle" />

<Button

android:id="@+id/button_save"

android:text="บันทึกข้อมูล" />

</GridLayout>

</android.support.v4.widget.NestedScrollView>

activity_product_detail.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ProductDetailActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_product_detail" />
    <!--
    <android.support.design.widget.FloatingActionButton
          android:id="@+id/fab"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_gravity="bottom|end"
          android:layout_margin="@dimen/fab_margin"
          app:srcCompat="@android:drawable/ic_dialog_email"/>
    -->
</android.support.design.widget.CoordinatorLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".ProductDetailActivity">

<android.support.design.widget.AppBarLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar

android:id="@+id/toolbar"

android:layout_width="match_parent"

android:layout_height="?attr/actionBarSize"

android:background="?attr/colorPrimary"

app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<!--

<android.support.design.widget.FloatingActionButton

android:id="@+id/fab"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="bottom|end"

android:layout_margin="@dimen/fab_margin"

app:srcCompat="@android:drawable/ic_dialog_email"/>

-->

</android.support.design.widget.CoordinatorLayout>

content_product_detail.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#fff"
    android:padding="16dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".ProductDetailActivity"
    tools:showIn="@layout/activity_product_detail">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/image_view"
            android:layout_width="400dp"
            android:layout_height="200dp"
            android:layout_gravity="center_horizontal"
            android:scaleType="centerCrop" />

        <TextView
            android:id="@+id/text_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp"
            android:layout_marginTop="10dp"
            android:paddingLeft="30dp"
            android:textColor="#00f"
            android:textSize="20sp" />

        <WebView
            android:id="@+id/web_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/text_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:paddingLeft="30dp"
            android:textColor="#090"
            android:textSize="16sp" />
    </LinearLayout>
</android.support.v4.widget.NestedScrollView>

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#fff"

android:padding="16dp"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

tools:context=".ProductDetailActivity"

tools:showIn="@layout/activity_product_detail">

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<ImageView

android:id="@+id/image_view"

android:layout_width="400dp"

android:layout_height="200dp"

android:layout_gravity="center_horizontal"

android:scaleType="centerCrop" />

<TextView

android:id="@+id/text_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginBottom="10dp"

android:layout_marginTop="10dp"

android:paddingLeft="30dp"

android:textColor="#00f"

android:textSize="20sp" />

<WebView

android:id="@+id/web_view"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

<TextView

android:id="@+id/text_price"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:paddingLeft="30dp"

android:textColor="#090"

android:textSize="16sp" />

</LinearLayout>

</android.support.v4.widget.NestedScrollView>

AddProductActivity.java

package com.phaisarn.myapplication;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.content.ContentValues;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.provider.MediaStore;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.vlk.multimager.activities.GalleryActivity;
import com.vlk.multimager.utils.Constants;
import com.vlk.multimager.utils.Image;
import com.vlk.multimager.utils.Params;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;

public class AddProductActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_product);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        fab.hide();

        Button btSelectImg = (Button) findViewById(R.id.button_image);
        btSelectImg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //ส่งอินเทนต์เพื่อเลือกภาพ
                Intent intent = new Intent(AddProductActivity.this, GalleryActivity.class);
                Params params = new Params();
                params.setPickerLimit(1);    //เลือกได้ 1 ภาพ
                intent.putExtra(Constants.KEY_PARAMS, params);
                startActivityForResult(intent,
                        Constants.TYPE_MULTI_PICKER);
            }
        });

        Button buttonSave = (Button) findViewById(R.id.button_save);
        buttonSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveData();
            }
        });

    }

    private void showGallery() {
        Intent intent = new Intent(Intent.ACTION_PICK);
        Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        intent.setData(uri);
        startActivityForResult(intent, 999);
    }

    //หลังเลือกภาพเสร็จ ให้นำภาพนั้นไปแสดงใน ImageView ให้เห็นด้วย
    @Override
    public void onActivityResult(int rqCode, int rsCode, Intent intent) {
        if (rqCode != Constants.TYPE_MULTI_PICKER && rsCode != RESULT_OK) {
            return;
        }
        ArrayList<Image> images = intent.getParcelableArrayListExtra(
                Constants.KEY_BUNDLE_LIST);

        Uri uri = images.get(0).uri;
        ImageView imageView = (ImageView) findViewById(R.id.image_view);
        imageView.setImageURI(uri);
        imageView.setVisibility(View.VISIBLE);
    }

    //เมธอดนี้จะถูกเรียกเมื่อคลิกปุ่มบันทึกข้อมูล
    private void saveData() {
        ImageView imageView = (ImageView) findViewById(R.id.image_view);
        if (imageView.getDrawable() == null) {
            showToast("ต้องมีรูปภาพ");
            return;
        }

        EditText editName = (EditText) findViewById(R.id.edit_name);
        if (editName.getText().toString().trim().equals("")) {
            showToast("ต้องกำหนดชื่อ");
            return;
        }

        SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);
        SQLiteDatabase db = sqLiteHelper.getWritableDatabase();

        EditText editPrice = (EditText) findViewById(R.id.edit_price);
        String name = editName.getText().toString();
        String price = editPrice.getText().toString();

        ContentValues cv = new ContentValues();
        cv.put("pro_name", name);
        cv.put("price", price);
        long pro_id = db.insert("product", null, cv);

        int[] edits = {R.id.edit_char1, R.id.edit_char2, R.id.edit_char3, R.id.edit_char4, R.id.edit_char5};
        for (int i = 0; i < edits.length; i++) {
            String ch = ((EditText) findViewById(edits[i])).getText().toString();
            if (ch.trim().equals("")) {
                continue;
            }
            cv = new ContentValues();
            cv.put("pro_id", pro_id);
            cv.put("pro_characteristic", ch);
            db.insert("characteristic", null, cv);
        }

        BitmapDrawable bitmapDrawable = (BitmapDrawable) imageView.getDrawable();
        byte[] imgContent = getBytes(bitmapDrawable.getBitmap());

        cv = new ContentValues();
        cv.put("pro_id", pro_id);
        cv.put("pro_image", imgContent);
        db.insert("image", null, cv);

        showToast("บันทึกข้อมูลเสร็จแล้ว");
    }

    public byte[] getBytes(Bitmap bitmap) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream);
        return stream.toByteArray();
    }

    private void showToast(String msg) {
        Toast.makeText(getBaseContext(), msg, Toast.LENGTH_LONG).show();
    }
}

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package com.phaisarn.myapplication;

import android.os.Bundle;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.Snackbar;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.View;

import android.content.ContentValues;

import android.content.Intent;

import android.database.sqlite.SQLiteDatabase;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.net.Uri;

import android.provider.MediaStore;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.Toast;

import com.vlk.multimager.activities.GalleryActivity;

import com.vlk.multimager.utils.Constants;

import com.vlk.multimager.utils.Image;

import com.vlk.multimager.utils.Params;

import java.io.ByteArrayOutputStream;

import java.util.ArrayList;

public class AddProductActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_add_product);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

fab.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

.setAction("Action", null).show();

}

});

fab.hide();

Button btSelectImg = (Button) findViewById(R.id.button_image);

btSelectImg.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

//ส่งอินเทนต์เพื่อเลือกภาพ

Intent intent = new Intent(AddProductActivity.this, GalleryActivity.class);

Params params = new Params();

params.setPickerLimit(1); //เลือกได้ 1 ภาพ

intent.putExtra(Constants.KEY_PARAMS, params);

startActivityForResult(intent,

Constants.TYPE_MULTI_PICKER);

}

});

Button buttonSave = (Button) findViewById(R.id.button_save);

buttonSave.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

saveData();

}

});

}

private void showGallery() {

Intent intent = new Intent(Intent.ACTION_PICK);

Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

intent.setData(uri);

startActivityForResult(intent, 999);

}

//หลังเลือกภาพเสร็จ ให้นำภาพนั้นไปแสดงใน ImageView ให้เห็นด้วย

@Override

public void onActivityResult(int rqCode, int rsCode, Intent intent) {

if (rqCode != Constants.TYPE_MULTI_PICKER && rsCode != RESULT_OK) {

return;

}

ArrayList<Image> images = intent.getParcelableArrayListExtra(

Constants.KEY_BUNDLE_LIST);

Uri uri = images.get(0).uri;

ImageView imageView = (ImageView) findViewById(R.id.image_view);

imageView.setImageURI(uri);

imageView.setVisibility(View.VISIBLE);

}

//เมธอดนี้จะถูกเรียกเมื่อคลิกปุ่มบันทึกข้อมูล

private void saveData() {

ImageView imageView = (ImageView) findViewById(R.id.image_view);

if (imageView.getDrawable() == null) {

showToast("ต้องมีรูปภาพ");

return;

}

EditText editName = (EditText) findViewById(R.id.edit_name);

if (editName.getText().toString().trim().equals("")) {

showToast("ต้องกำหนดชื่อ");

return;

}

SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);

SQLiteDatabase db = sqLiteHelper.getWritableDatabase();

EditText editPrice = (EditText) findViewById(R.id.edit_price);

String name = editName.getText().toString();

String price = editPrice.getText().toString();

ContentValues cv = new ContentValues();

cv.put("pro_name", name);

cv.put("price", price);

long pro_id = db.insert("product", null, cv);

int[] edits = {R.id.edit_char1, R.id.edit_char2, R.id.edit_char3, R.id.edit_char4, R.id.edit_char5};

for (int i = 0; i < edits.length; i++) {

String ch = ((EditText) findViewById(edits[i])).getText().toString();

if (ch.trim().equals("")) {

continue;

}

cv = new ContentValues();

cv.put("pro_id", pro_id);

cv.put("pro_characteristic", ch);

db.insert("characteristic", null, cv);

}

BitmapDrawable bitmapDrawable = (BitmapDrawable) imageView.getDrawable();

byte[] imgContent = getBytes(bitmapDrawable.getBitmap());

cv = new ContentValues();

cv.put("pro_id", pro_id);

cv.put("pro_image", imgContent);

db.insert("image", null, cv);

showToast("บันทึกข้อมูลเสร็จแล้ว");

}

public byte[] getBytes(Bitmap bitmap) {

ByteArrayOutputStream stream = new ByteArrayOutputStream();

bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream);

return stream.toByteArray();

}

private void showToast(String msg) {

Toast.makeText(getBaseContext(), msg, Toast.LENGTH_LONG).show();

}

ProductDetailActivity.java

package com.phaisarn.myapplication;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.webkit.WebView;
import android.widget.ImageView;
import android.widget.TextView;

import java.text.NumberFormat;

public class ProductDetailActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product_detail);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
            /*
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                  @Override
                  public void onClick(View view) {
                        Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                                .setAction("Action", null).show();
                  }
            });
            */
    }

    @Override
    public void onStart() {
        super.onStart();
        Intent intent = getIntent();
        String _id = intent.getStringExtra("_id");

        SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);
        SQLiteDatabase db = sqLiteHelper.getReadableDatabase();

        String sql =
                "SELECT product.*, image.pro_image FROM product " +
                        "LEFT JOIN image " +
                        "ON product._id = image.pro_id " +
                        "WHERE product._id = " + _id;

        Cursor cursor = db.rawQuery(sql, null);

        ImageView imageView = (ImageView) findViewById(R.id.image_view);
        TextView textName = (TextView) findViewById(R.id.text_name);
        TextView textPrice = (TextView) findViewById(R.id.text_price);
        WebView webView = (WebView) findViewById(R.id.web_view);

        if (cursor.moveToNext()) {
            imageView.setImageBitmap(getImage(cursor.getBlob(3)));
            textName.setText(cursor.getString(1));
            NumberFormat numFormat = NumberFormat.getInstance();   //่java.text.NumberFormat
            int price = cursor.getInt(2);
            textPrice.setText("ราคา: " + numFormat.format(price) + " บาท");
        }
        cursor.close();

        sql = "SELECT pro_characteristic FROM characteristic WHERE pro_id = " + _id;
        cursor = db.rawQuery(sql, null);

        String html = "<ul>";
        while (cursor.moveToNext()) {
            html += "<li>" + cursor.getString(0) + "</li>";
        }
        html += "</ul>";
        webView.loadDataWithBaseURL(null, html, "text/html", "utf-8", null);

        cursor.close();
    }

    public Bitmap getImage(byte[] image) {
        return BitmapFactory.decodeByteArray(image, 0, image.length);
    }

    @Override
    public void onBackPressed() {
        finish();
    }

}

package com.phaisarn.myapplication;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.content.Intent;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.webkit.WebView;

import android.widget.ImageView;

import android.widget.TextView;

import java.text.NumberFormat;

public class ProductDetailActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_product_detail);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

fab.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

.setAction("Action", null).show();

}

});

}

@Override

public void onStart() {

super.onStart();

Intent intent = getIntent();

String _id = intent.getStringExtra("_id");

SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);

SQLiteDatabase db = sqLiteHelper.getReadableDatabase();

String sql =

"SELECT product.*, image.pro_image FROM product " +

"LEFT JOIN image " +

"ON product._id = image.pro_id " +

"WHERE product._id = " + _id;

Cursor cursor = db.rawQuery(sql, null);

ImageView imageView = (ImageView) findViewById(R.id.image_view);

TextView textName = (TextView) findViewById(R.id.text_name);

TextView textPrice = (TextView) findViewById(R.id.text_price);

WebView webView = (WebView) findViewById(R.id.web_view);

if (cursor.moveToNext()) {

imageView.setImageBitmap(getImage(cursor.getBlob(3)));

textName.setText(cursor.getString(1));

NumberFormat numFormat = NumberFormat.getInstance(); //่java.text.NumberFormat

int price = cursor.getInt(2);

textPrice.setText("ราคา: " + numFormat.format(price) + " บาท");

}

cursor.close();

sql = "SELECT pro_characteristic FROM characteristic WHERE pro_id = " + _id;

cursor = db.rawQuery(sql, null);

String html = "<ul>";

while (cursor.moveToNext()) {

html += "<li>" + cursor.getString(0) + "</li>";

}

html += "</ul>";

webView.loadDataWithBaseURL(null, html, "text/html", "utf-8", null);

cursor.close();

}

public Bitmap getImage(byte[] image) {

return BitmapFactory.decodeByteArray(image, 0, image.length);

}

@Override

public void onBackPressed() {

finish();

}

MainActivity.java

package com.phaisarn.myapplication;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                        /*
                        Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                                .setAction("Action", null).show();
                                */
                startActivity(new Intent(MainActivity.this, AddProductActivity.class));
            }
        });

    }

    @Override
    public void onStart() {
        super.onStart();

        SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);
        SQLiteDatabase db = sqLiteHelper.getReadableDatabase();

        String sql =
                "SELECT product.*, image.pro_image FROM product " +
                        "LEFT JOIN image " +
                        "ON product._id = image.pro_id";

        Cursor cursor = db.rawQuery(sql, null);

        ArrayList<RowItem> itemArray = new ArrayList<>();
        RowItem item;
        while (cursor.moveToNext()) {
            item = new RowItem();
            item._id = cursor.getInt(0);
            item.name = cursor.getString(1);
            item.image = cursor.getBlob(3);
            itemArray.add(item);
        }

        RecyclerView rcv = (RecyclerView) findViewById(R.id.recycler_view);
        CustomAdapter adapter = new CustomAdapter(this, itemArray);
        rcv.setAdapter(adapter);

        //RecyclerView.ItemDecoration itemDecor = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);
        //rcv.addItemDecoration(itemDecor);

        //LinearLayoutManager layout = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);
        GridLayoutManager layout = new GridLayoutManager(this, 2);
        rcv.setLayoutManager(layout);

        //cursor.close();
    }

    @Override
    public void onBackPressed() {
        finishAffinity();
        System.exit(0);

            /*
            finish();
            android.os.Process.killProcess(android.os.Process.myPid());
            super.onDestroy();
            */
            /*
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_HOME);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
            */
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

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package com.phaisarn.myapplication;

import android.os.Bundle;

import android.support.design.widget.FloatingActionButton;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.View;

import android.view.Menu;

import android.view.MenuItem;

import android.content.Intent;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.support.v7.widget.GridLayoutManager;

import android.support.v7.widget.RecyclerView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

fab.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

.setAction("Action", null).show();

startActivity(new Intent(MainActivity.this, AddProductActivity.class));

}

});

}

@Override

public void onStart() {

super.onStart();

SQLiteHelper sqLiteHelper = SQLiteHelper.getInstance(this);

SQLiteDatabase db = sqLiteHelper.getReadableDatabase();

String sql =

"SELECT product.*, image.pro_image FROM product " +

"LEFT JOIN image " +

"ON product._id = image.pro_id";

Cursor cursor = db.rawQuery(sql, null);

ArrayList<RowItem> itemArray = new ArrayList<>();

RowItem item;

while (cursor.moveToNext()) {

item = new RowItem();

item._id = cursor.getInt(0);

item.name = cursor.getString(1);

item.image = cursor.getBlob(3);

itemArray.add(item);

}

RecyclerView rcv = (RecyclerView) findViewById(R.id.recycler_view);

CustomAdapter adapter = new CustomAdapter(this, itemArray);

rcv.setAdapter(adapter);

//RecyclerView.ItemDecoration itemDecor = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);

//rcv.addItemDecoration(itemDecor);

//LinearLayoutManager layout = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);

GridLayoutManager layout = new GridLayoutManager(this, 2);

rcv.setLayoutManager(layout);

//cursor.close();

}

@Override

public void onBackPressed() {

finishAffinity();

System.exit(0);

finish();

android.os.Process.killProcess(android.os.Process.myPid());

super.onDestroy();

Intent intent = new Intent(Intent.ACTION_MAIN);

intent.addCategory(Intent.CATEGORY_HOME);

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);

startActivity(intent);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.menu_main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button, so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

//noinspection SimplifiableIfStatement

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

CustomAdapter.java

package com.phaisarn.myapplication;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;

public class CustomAdapter extends RecyclerView.Adapter<CustomHolder> {

    private ArrayList<RowItem> mItems;
    private Context mContext;

    public CustomAdapter(Context context, ArrayList<RowItem> items) {
        mContext = context;
        mItems = items;
    }

    @Override
    public int getItemCount() {
        return mItems.size();
    }

    @Override
    public CustomHolder onCreateViewHolder(ViewGroup vg, int type) {
        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View view = inflater.inflate(R.layout.item_layout, vg, false);
        final CustomHolder vHolder = new CustomHolder(view);

        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int pos = vHolder.getAdapterPosition();
                if (pos != RecyclerView.NO_POSITION) {
                    RowItem item = mItems.get(pos);
                    Intent intent = new Intent(mContext, ProductDetailActivity.class);
                    intent.putExtra("_id", String.valueOf(item._id));   //ต้องกำหนดเป็นชนิด String
                    mContext.startActivity(intent);
                }
            }
        });
        return vHolder;
    }

    @Override
    public void onBindViewHolder(CustomHolder vHolder, int position) {
        RowItem item = mItems.get(position);
        vHolder.imageView.setImageBitmap(getImage(item.image));
        vHolder.textView.setText(item.name);
    }

    public Bitmap getImage(byte[] image) {
        return BitmapFactory.decodeByteArray(image, 0, image.length);
    }
}

package com.phaisarn.myapplication;

import android.content.Context;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import java.util.ArrayList;

public class CustomAdapter extends RecyclerView.Adapter<CustomHolder> {

private ArrayList<RowItem> mItems;

private Context mContext;

public CustomAdapter(Context context, ArrayList<RowItem> items) {

mContext = context;

mItems = items;

}

@Override

public int getItemCount() {

return mItems.size();

}

@Override

public CustomHolder onCreateViewHolder(ViewGroup vg, int type) {

final LayoutInflater inflater = LayoutInflater.from(mContext);

View view = inflater.inflate(R.layout.item_layout, vg, false);

final CustomHolder vHolder = new CustomHolder(view);

view.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

int pos = vHolder.getAdapterPosition();

if (pos != RecyclerView.NO_POSITION) {

RowItem item = mItems.get(pos);

Intent intent = new Intent(mContext, ProductDetailActivity.class);

intent.putExtra("_id", String.valueOf(item._id)); //ต้องกำหนดเป็นชนิด String

mContext.startActivity(intent);

}

});

return vHolder;

}

@Override

public void onBindViewHolder(CustomHolder vHolder, int position) {

RowItem item = mItems.get(position);

vHolder.imageView.setImageBitmap(getImage(item.image));

vHolder.textView.setText(item.name);

}

public Bitmap getImage(byte[] image) {

return BitmapFactory.decodeByteArray(image, 0, image.length);

}

CustomHolder.java

package com.phaisarn.myapplication;

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomHolder extends RecyclerView.ViewHolder {
    public ImageView imageView;
    public TextView textView;

    public CustomHolder(View view) {
        super(view);
        imageView = (ImageView) view.findViewById(R.id.image_view);
        textView = (TextView) view.findViewById(R.id.text_name);
    }
}

package com.phaisarn.myapplication;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import android.widget.ImageView;

import android.widget.TextView;

public class CustomHolder extends RecyclerView.ViewHolder {

public ImageView imageView;

public TextView textView;

public CustomHolder(View view) {

super(view);

imageView = (ImageView) view.findViewById(R.id.image_view);

textView = (TextView) view.findViewById(R.id.text_name);

}

RowItem.java

package com.phaisarn.myapplication;

public class RowItem {
      public int _id;
      public String name;
      public byte[] image;
}

package com.phaisarn.myapplication;

public class RowItem {

public int _id;

public String name;

public byte[] image;

}

SQLiteHelper.java

package com.phaisarn.myapplication;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class SQLiteHelper extends SQLiteOpenHelper {
    private static SQLiteHelper sqLiteDB;
    private static final String DB_NAME = "db_product";
    private static final int DB_VERSION = 1;

    private SQLiteHelper(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
    }

    public static synchronized SQLiteHelper getInstance(Context context) {
        if (sqLiteDB == null) {
            sqLiteDB = new SQLiteHelper(context.getApplicationContext());
        }
        return sqLiteDB;
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String sql =
                "CREATE TABLE IF NOT EXISTS product(" +
                        "_id INTEGER PRIMARY KEY AUTOINCREMENT, " +
                        "pro_name TEXT, " +
                        "price INTEGER)";
        db.execSQL(sql);

        sql =
                "CREATE TABLE IF NOT EXISTS characteristic(" +
                        "_id INTEGER PRIMARY KEY AUTOINCREMENT, " +
                        "pro_id INTEGER, " +
                        "pro_characteristic TEXT)";
        db.execSQL(sql);

        sql =
                "CREATE TABLE IF NOT EXISTS image(" +
                        "pro_id INTEGER, " +
                        "pro_image BLOB)";
        db.execSQL(sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {

    }

    @Override
    public void onDowngrade(SQLiteDatabase db, int oldV, int newV) {

    }
}

package com.phaisarn.myapplication;

import android.content.Context;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class SQLiteHelper extends SQLiteOpenHelper {

private static SQLiteHelper sqLiteDB;

private static final String DB_NAME = "db_product";

private static final int DB_VERSION = 1;

private SQLiteHelper(Context context) {

super(context, DB_NAME, null, DB_VERSION);

}

public static synchronized SQLiteHelper getInstance(Context context) {

if (sqLiteDB == null) {

sqLiteDB = new SQLiteHelper(context.getApplicationContext());

}

return sqLiteDB;

}

@Override

public void onCreate(SQLiteDatabase db) {

String sql =

"CREATE TABLE IF NOT EXISTS product(" +

"_id INTEGER PRIMARY KEY AUTOINCREMENT, " +

"pro_name TEXT, " +

"price INTEGER)";

db.execSQL(sql);

sql =

"CREATE TABLE IF NOT EXISTS characteristic(" +

"_id INTEGER PRIMARY KEY AUTOINCREMENT, " +

"pro_id INTEGER, " +

"pro_characteristic TEXT)";

db.execSQL(sql);

sql =

"CREATE TABLE IF NOT EXISTS image(" +

"pro_id INTEGER, " +

"pro_image BLOB)";

db.execSQL(sql);

}

@Override

public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {

}

@Override

public void onDowngrade(SQLiteDatabase db, int oldV, int newV) {

}

รูปที่ใช้

Phaisarn Sutheebanjard

blog.phaisarn.com

การจัดเก็บรายการ RecyclerView ด้วย SQLite