详解Android中Notification的使用方法

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 > 
<TextView  
 android:layout_width="fill_parent"  
 android:layout_height="wrap_content"  
 android:gravity="center" 
 android:textColor="#EEE" 
 android:textStyle="bold" 
 android:textSize="25sp" 
 android:text="NotificationDemo实例" /> 
<Button 
 android:id="@+id/btnSend" 
 android:text="send notification" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:layout_gravity="center"/>  
</LinearLayout> 

package com.andyidea.notification; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
 
public class MainActivity extends Activity { 
 private Button btnSend; 
  
 //定义BroadcastReceiver的action 
 private static final String NotificationDemo_Action = "com.andyidea.notification.NotificationDemo_Action"; 
  
 /** Called when the activity is first created. */ 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
   
  btnSend = (Button)findViewById(R.id.btnSend); 
  btnSend.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    Intent intent = new Intent(); 
    intent.setAction(NotificationDemo_Action); 
    sendBroadcast(intent); 
   } 
  }); 
 } 
  
} 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent"> 
 <TextView  
 android:layout_width="fill_parent"  
 android:layout_height="wrap_content"  
 android:gravity="center" 
 android:textColor="#EEE" 
 android:textStyle="bold" 
 android:textSize="25sp" 
 android:text="显示通知界面" /> 
<Button 
 android:id="@+id/btnCancel" 
 android:text="cancel notification" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:layout_gravity="center" />  
</LinearLayout> 

package com.andyidea.notification; 
 
import android.app.Activity; 
import android.app.Notification; 
import android.app.NotificationManager; 
import android.app.PendingIntent; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
 
public class SecondActivity extends Activity { 
 
 private Button btnCancel; 
 //声明Notification 
 private Notification notification; 
 //声明NotificationManager 
 private NotificationManager mNotification; 
 //标识Notification的ID 
 private static final int ID = 1; 
  
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.secondlayout); 
   
  btnCancel = (Button)findViewById(R.id.btnCancel); 
  //怎样获得NotificationManager的实例? 
  String service = NOTIFICATION_SERVICE; 
  mNotification = (NotificationManager)getSystemService(service); 
   
  //获得Notification的实例 
  notification = new Notification(); 
   
  //设置该图标 会在状态栏显示 
  int icon = notification.icon = android.R.drawable.stat_sys_phone_call; 
  //设置提示信息 
  String tickerText = "Test Notification"; 
  //设置显示时间 
  long when = System.currentTimeMillis(); 
  notification.icon = icon; 
  notification.tickerText = tickerText; 
  notification.when = when; 
   
  Intent intent = new Intent(this, MainActivity.class); 
  PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0); 
  notification.setLatestEventInfo(this, "消息", "SMS Android", pi); 
  mNotification.notify(ID, notification); 
   
  btnCancel.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    mNotification.cancel(ID); //--->取消通知 
   } 
  }); 
 } 
  
} 

package com.andyidea.notification; 
 
import com.andyidea.notification.SecondActivity; 
 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
 
public class NotificationReceiver extends BroadcastReceiver { 
 
 @Override 
 public void onReceive(Context context, Intent intent) { 
  //实例化Intent 
  Intent i = new Intent(); 
  //在新任务中启动Activity 
  i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
  //设置Intent启动的组件名称 
  i.setClass(context, SecondActivity.class); 
  //启动Activity,显示通知 
  context.startActivity(i); 
 } 
 
}