对话框出现4秒后自动消失的代码实现

 [代码]java代码：

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public class MainActivity   extends AppCompatActivity   {       private Button dialog1,dialog2;     private AlertDialog alert;     private Timer timerl;     private MyHandler handler;         @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);           setContentView(R.layout.activity_main);                   timerl=new Timer();         handler=new MyHandler();                   dialog1=(Button)findViewById(R.id.dialog1);         dialog1.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 showAlertDialog();             }         });         }       private void showAlertDialog(){         AlertDialog.Builder   builder=new AlertDialog(this);         builder.setTitle("confirm!");         builder.setMessage("welcome   to use~");         builder.setCancelable(false);         alert=builder.create();         alert.show();           timerl.schedule(new CloseDialogTask(),4000);     }           private class CloseDialogTask extends TimerTask     {      private void run(){          handler.sendEmptyMessage(0);      }         }           private class MyHandler extends Handler{         public void handleMessage(Message msg){             alert.dismiss();         }     }

原文链接：http://www.apkbus.com/blog-919484-72797.html