การใช้ ViewPager แบบไม่มี Fragment

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:support-v4:26.1.0'
    implementation 'com.github.romandanylyk:PageIndicatorView:v0.1.2'
    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'
}

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:support-v4:26.1.0'

implementation 'com.github.romandanylyk:PageIndicatorView:v0.1.2'

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'

}

layout/my_pager_adapter.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:scaleType="centerCrop" />
</LinearLayout>

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<ImageView

android:id="@+id/imageView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:scaleType="centerCrop" />

</LinearLayout>

MyPagerAdapter.java

package com.phaisarn.myapplication;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import android.support.v4.view.PagerAdapter;
import android.widget.ImageView;

public class MyPagerAdapter extends PagerAdapter {
    private LayoutInflater mInflator;
    private int[] mImages = {R.drawable.p1, R.drawable.p2,
            R.drawable.p3, R.drawable.p4, R.drawable.p5};

    public MyPagerAdapter(Context context) {
        mInflator = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return mImages.length;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        View itemView = mInflator.inflate(R.layout.my_pager_adapter, container, false);
        ImageView imageView = itemView.findViewById(R.id.imageView);
        imageView.setImageResource(mImages[position]);
        container.addView(itemView);
        return itemView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }
      /*
      @Override
      public CharSequence getPageTitle(int position) {
            return super.getPageTitle(position);
      }
      */
}

package com.phaisarn.myapplication;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.support.v4.view.PagerAdapter;

import android.widget.ImageView;

public class MyPagerAdapter extends PagerAdapter {

private LayoutInflater mInflator;

private int[] mImages = {R.drawable.p1, R.drawable.p2,

R.drawable.p3, R.drawable.p4, R.drawable.p5};

public MyPagerAdapter(Context context) {

mInflator = LayoutInflater.from(context);

}

@Override

public int getCount() {

return mImages.length;

}

@Override

public Object instantiateItem(ViewGroup container, int position) {

View itemView = mInflator.inflate(R.layout.my_pager_adapter, container, false);

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

imageView.setImageResource(mImages[position]);

container.addView(itemView);

return itemView;

}

@Override

public void destroyItem(ViewGroup container, int position, Object object) {

container.removeView((View) object);

}

@Override

public boolean isViewFromObject(View view, Object object) {

return view == object;

}

@Override

public CharSequence getPageTitle(int position) {

return super.getPageTitle(position);

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.rd.PageIndicatorView
        android:id="@+id/pageIndicatorView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center_horizontal"
        android:layout_marginBottom="20dp"
        app:piv_animationType="fill"
        app:piv_radius="10dp"
        app:piv_select="0"
        app:piv_selectedColor="#0f0"
        app:piv_unselectedColor="#ccc"
        app:piv_viewPager="@id/viewPager" />

</FrameLayout>

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

<FrameLayout 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.v4.view.ViewPager

android:id="@+id/viewPager"

android:layout_width="match_parent"

android:layout_height="match_parent" />

<com.rd.PageIndicatorView

android:id="@+id/pageIndicatorView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="bottom|center_horizontal"

android:layout_marginBottom="20dp"

app:piv_animationType="fill"

app:piv_radius="10dp"

app:piv_select="0"

app:piv_selectedColor="#0f0"

app:piv_unselectedColor="#ccc"

app:piv_viewPager="@id/viewPager" />

</FrameLayout>

MainActivity.java

package com.phaisarn.myapplication;

import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        MyPagerAdapter adapter = new MyPagerAdapter(getBaseContext());
        ViewPager pager = findViewById(R.id.viewPager);
        pager.setAdapter(adapter);
    }

}