android AlertDialog Demo-优快云博客

本文介绍了一个简单的Android应用程序示例，该程序展示了如何使用AlertDialog.Builder创建一个带有两个按钮（Yes和No）的对话框。当点击Yes按钮时，当前活动将被关闭；如果点击No按钮，则仅关闭对话框而不执行其他操作。

	final Context context = this;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		Button button = (Button) findViewById(R.id.button1);
		button.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
				alertDialogBuilder.setTitle("Your Title");
				alertDialogBuilder
				.setMessage("Click yes to exit!")
				.setCancelable(false)
				.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,int id) {
						// if this button is clicked, close
						// current activity
						MainActivity.this.finish();
					}
				  })
				.setNegativeButton("No",new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,int id) {
						// if this button is clicked, just close
						// the dialog box and do nothing
						dialog.cancel();
					}
				});
				AlertDialog alertDialog = alertDialogBuilder.create();
				 
				// show it
				alertDialog.show();
			}
		});
	}

借鉴自：http://www.mkyong.com/android/android-alert-dialog-example/