Android中使用Notification实现状态栏的通知

package com.example.notification; import android.os.Bundle; import android.app.Activity; import android.app.Notification; import android.app.Notification.Builder; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity implements OnClickListener{  private NotificationManager manager;  private Button button1;  private Button button2;  private int Notification_ID;  @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  manager=(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);  button1=(Button) findViewById(R.id.button1);  button2=(Button) findViewById(R.id.button2);  button1.setOnClickListener(this);  button2.setOnClickListener(this);  }  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  switch(v.getId()){  case R.id.button1:{  showNotification();  break;  }  case R.id.button2:{  manager.cancel(Notification_ID);  break;  }  }  }  private void showNotification() {  // TODO Auto-generated method stub  Notification.Builder builder=new Builder(this);  builder.setSmallIcon(R.drawable.ic_launcher);//设置图标  builder.setTicker("通知来啦");//手机状态栏的提示  builder.setContentTitle("我是通知标题");//设置标题  builder.setContentText("我是通知内容");//设置通知内容  builder.setWhen(System.currentTimeMillis());//设置通知时间  Intent intent=new Intent(this,MainActivity.class);  PendingIntent pendingIntent=PendingIntent.getActivity(this, 0, intent, 0);  builder.setContentIntent(pendingIntent);//点击后的意图  builder.setDefaults(Notification.DEFAULT_LIGHTS);//设置指示灯  builder.setDefaults(Notification.DEFAULT_SOUND);//设置提示声音  builder.setDefaults(Notification.DEFAULT_VIBRATE);//设置震动  Notification notification=builder.build();//4.1以上，以下要用getNotification()  manager.notify(Notification_ID, notification);  } } 

<uses-permission android:name="android.permission.VIBRATE" /> <uses-permission android:name="android.permission.FLASHLIGHT" />