<Android>AlertDialog對話視窗(關於&離開本程式)－Cuiu's Home

AlertDialog對話視窗(關於)

java:

import android.os.Bundle;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final Button button01 = (Button) findViewById(R.id.button1);

final Button button02 = (Button) findViewById(R.id.button2);

button01.setOnClickListener(new OnClickListener(){

public void onClick(View arg0) {

About();

}

});

button02.setOnClickListener(new OnClickListener(){

public void onClick(View arg0) {

Leave();

}

});

}

private void About() {

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("關於")

.setMessage("這是 Alert Dialog")

.show();

}

private void Leave() {

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setMessage("確定要離開本程式嗎?")

.setPositiveButton("Yes", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

MainActivity.this.finish();

}

})

.setNegativeButton("No", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

dialog.cancel();

}

});

AlertDialog about_dialog = builder.create();

about_dialog.show();

}

xml:

<RelativeLayout 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"
tools:context=".MainActivity" >

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="關於" />

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1"
android:text="離開本程式?" />

</RelativeLayout>