Android基础TOP4_1(点击物理按钮弹出退出提示框)

幽映每白日,清辉照衣裳。这篇文章主要讲述Android基础TOP4_1:点击物理按钮弹出退出提示框相关的知识,希望能为你提供帮助。
java:

public class MainActivity extends Activity {@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } //点击物理按钮时,执行退出提示 public boolean onKeyDown(int keyCode,KeyEvent event){ if(keyCode==KeyEvent.KEYCODE_BACK & & event.getRepeatCount()==0){ creatdialog(); } return false; }private void creatdialog() { // TODO Auto-generated method stub AlertDialog.Builder b=new Builder(MainActivity.this); //设置提示框内容 b.setMessage("确认退出么"); //设置标题栏 b.setTitle("提示"); b.setPositiveButton("确认",new OnClickListener() {public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub //点确定时退出程序,并隐藏此对话框 dialog.dismiss(); MainActivity.this.finish(); } }).setNegativeButton("取消",new OnClickListener() {@Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub //点击取消时只隐藏对话框 dialog.dismiss(); } }); b.create().show(); }}

【Android基础TOP4_1(点击物理按钮弹出退出提示框)】 

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