具有交互功能的对话框 AlertDialog

public class CH03_12 extends Activity {
	/** Called when the activity is first created. */
	private Button btn;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		btn = (Button)findViewById(R.id.btn);
		btn.setOnClickListener(new BtnClick());
		
	}
	
	//事件
	class BtnClick implements OnClickListener
	{
		@Override
		public void onClick(View v) 
		{
			//设置弹出对话框的地方
			new AlertDialog.Builder(CH03_12.this).setTitle("提示").setMessage("您好").setPositiveButton
			(
					"您确定?",
					new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog, int which) {
							// 这里写当对对话框点击之后要执行的代码
							//finish(); //这里执行离开程序
						}
					}
			).show();
			
		}
	}
}