Android 监听返回键，弹出一个退出对话框

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public class BackKeyTest extends Activity{/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event){if (keyCode == KeyEvent.KEYCODE_BACK ){// 创建退出对话框AlertDialog isExit = new AlertDialog.Builder(this).create();// 设置对话框标题isExit.setTitle("系统提示");// 设置对话框消息isExit.setMessage("确定要退出吗");// 添加选择按钮并注册监听isExit.setButton("确定", listener);isExit.setButton2("取消", listener);// 显示对话框isExit.show();}return false;}/**监听对话框里面的button点击事件*/DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener(){public void onClick(DialogInterface dialog, int which){switch (which){case AlertDialog.BUTTON_POSITIVE:// "确认"按钮退出程序finish();break;case AlertDialog.BUTTON_NEGATIVE:// "取消"第二个按钮取消对话框break;default:break;}}};}

http://blog.csdn.net/sunnyfans/article/details/8094349

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