การสร้าง Confirm Dialog Fragment

ConfirmDialog.java

package com.phaisarn.myapplication;

import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AlertDialog;

public class ConfirmDialog extends DialogFragment {
    /* ควรสร้างตัวเลือกแบบ enum สำหรับใช้เปรียบเทียบว่าปุ่มใดถูกคลิก
        จะช่วยลดข้อผิดพลาดได้มากกว่าการใช้ค่าเป็นสตริง
     */
    enum Button {    //จะอ้างถึง enum นี้ในแบบ ConfirmDialog.Button
        Negative,
        Positive
    }

    public ConfirmDialog() {
    }

    public static ConfirmDialog newInstance(String msg, String negText, String posText) {
        ConfirmDialog dialog = new ConfirmDialog();
        Bundle args = new Bundle();
        args.putString("message", msg);
        args.putString("negText", negText);
        args.putString("posText", posText);
        dialog.setArguments(args);
        return dialog;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        String message = getArguments().getString("message");
        String posText = getArguments().getString("posText");
        String negText = getArguments().getString("negText");

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
                .setMessage(message)
                .setNegativeButton(negText, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //ถ้าปุ่ม Negative ถูกคลิก ก็ส่ง
                        mListener.onFinishDialog(Button.Negative);
                    }
                })
                .setPositiveButton(posText, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        mListener.onFinishDialog(Button.Positive);
                    }
                });

        return builder.create();
    }

    interface OnFinishDialogListener {
        void onFinishDialog(ConfirmDialog.Button button);
        //กำหนด Type ของพารามิเตอร์เป็น enum ที่สร้างขึ้น
    }

    private OnFinishDialogListener mListener;

    public void setOnFinishDialogListener(OnFinishDialogListener listener) {
        mListener = listener;
    }
}

package com.phaisarn.myapplication;

import android.app.Dialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.support.v4.app.DialogFragment;

import android.support.v7.app.AlertDialog;

public class ConfirmDialog extends DialogFragment {

/* ควรสร้างตัวเลือกแบบ enum สำหรับใช้เปรียบเทียบว่าปุ่มใดถูกคลิก

จะช่วยลดข้อผิดพลาดได้มากกว่าการใช้ค่าเป็นสตริง

enum Button { //จะอ้างถึง enum นี้ในแบบ ConfirmDialog.Button

Negative,

Positive

}

public ConfirmDialog() {

}

public static ConfirmDialog newInstance(String msg, String negText, String posText) {

ConfirmDialog dialog = new ConfirmDialog();

Bundle args = new Bundle();

args.putString("message", msg);

args.putString("negText", negText);

args.putString("posText", posText);

dialog.setArguments(args);

return dialog;

}

@Override

public Dialog onCreateDialog(Bundle savedInstanceState) {

String message = getArguments().getString("message");

String posText = getArguments().getString("posText");

String negText = getArguments().getString("negText");

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())

.setMessage(message)

.setNegativeButton(negText, new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

//ถ้าปุ่ม Negative ถูกคลิก ก็ส่ง

mListener.onFinishDialog(Button.Negative);

}

})

.setPositiveButton(posText, new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

mListener.onFinishDialog(Button.Positive);

}

});

return builder.create();

}

interface OnFinishDialogListener {

void onFinishDialog(ConfirmDialog.Button button);

//กำหนด Type ของพารามิเตอร์เป็น enum ที่สร้างขึ้น

}

private OnFinishDialogListener mListener;

public void setOnFinishDialogListener(OnFinishDialogListener listener) {

mListener = listener;

}

activity_main.xml

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

    <Button
        android:id="@+id/button_confirm"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="56dp"
        android:text="Show Confirm Dialog"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"/>

</LinearLayout>

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

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity">

<Button

android:id="@+id/button_confirm"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="56dp"

android:text="Show Confirm Dialog"

android:layout_alignParentTop="true"

android:layout_centerHorizontal="true"/>

</LinearLayout>

MainActivity.java

package com.phaisarn.myapplication;

import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        android.widget.Button buttonConfirm = findViewById(R.id.button_confirm);
        buttonConfirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showConfirmDialog();
            }
        });
    }

    private void showConfirmDialog() {
        FragmentManager fm = getSupportFragmentManager();
        ConfirmDialog dlg = ConfirmDialog.newInstance("ต้องการปิดแอปพลิเคชั่นนี้จริงหรือไม่?", "ไม่ใช่", "ใช่");
        dlg.show(fm, null);
        dlg.setOnFinishDialogListener(new ConfirmDialog.OnFinishDialogListener() {
            @Override
            public void onFinishDialog(ConfirmDialog.Button button) {
                if (button == ConfirmDialog.Button.Positive) {
                    //Toast.makeText(getBaseContext(), "ใช่", Toast.LENGTH_SHORT).show();
                    finishAffinity();
                    System.exit(0);
                } else if (button == ConfirmDialog.Button.Negative) {
                    Toast.makeText(getBaseContext(), "ยกเลิก", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

}

package com.phaisarn.myapplication;

import android.support.v4.app.FragmentManager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

android.widget.Button buttonConfirm = findViewById(R.id.button_confirm);

buttonConfirm.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

showConfirmDialog();

}

});

}

private void showConfirmDialog() {

FragmentManager fm = getSupportFragmentManager();

ConfirmDialog dlg = ConfirmDialog.newInstance("ต้องการปิดแอปพลิเคชั่นนี้จริงหรือไม่?", "ไม่ใช่", "ใช่");

dlg.show(fm, null);

dlg.setOnFinishDialogListener(new ConfirmDialog.OnFinishDialogListener() {

@Override

public void onFinishDialog(ConfirmDialog.Button button) {

if (button == ConfirmDialog.Button.Positive) {

//Toast.makeText(getBaseContext(), "ใช่", Toast.LENGTH_SHORT).show();

finishAffinity();

System.exit(0);

} else if (button == ConfirmDialog.Button.Negative) {

Toast.makeText(getBaseContext(), "ยกเลิก", Toast.LENGTH_SHORT).show();

}

});

}

Phaisarn Sutheebanjard

blog.phaisarn.com

การสร้าง Confirm Dialog Fragment