狀態欄通知(status bar notification)

狀態欄通知(status bar notification)在系統的狀態欄之上添加一個圖標(連帶有可選的文本信息), 以及在“通知“窗口之上添加一個擴展信息.




創建狀態欄通知的基本步驟：

1 - 獲取NotificationManager引用對象(Get a reference to the NotificationManager)

2 - 實例化(Instantiate the Notification)

3 - 定義通知擴展的消息和意圖(Define the Notification's expanded message and Intent)

4 - 傳遞通知給其NotificationManager(Pass the Notification to the NotificationManager)

下面是一個簡單的例子:

main.xml

<?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:text="@string/hello"
    />
<Button
    android:id="@+id/fire"  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="- Fire Notification -"
    />
</LinearLayout>

AndroidStatusBarNotifications.java

package com.AndroidStatusBarNotifications;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class AndroidStatusBarNotifications extends Activity {
 
 private static final int ID_My_Notification = 1;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button buttonFire = (Button)findViewById(R.id.fire);
        buttonFire.setOnClickListener(buttonFireOnClickListener);
    }
    
    private Button.OnClickListener buttonFireOnClickListener
    = new Button.OnClickListener(){

  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   
   //Get a reference to the NotificationManager
   String ns = Context.NOTIFICATION_SERVICE;
   NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
   
   //Instantiate the Notification
   int icon = android.R.drawable.ic_dialog_alert;
   CharSequence tickerText = "Hello";
   long when = System.currentTimeMillis();

   Notification notification = new Notification(icon, tickerText, when);
   
   //Define the Notification's expanded message and Intent
   Context context = getApplicationContext();
   CharSequence contentTitle = "My Notification";
   CharSequence contentText = "Hello My Notification!";
   //Intent notificationIntent = new Intent(AndroidStatusBarNotifications.this, AndroidStatusBarNotifications.class);
   Intent notificationIntent = new Intent(getBaseContext(), AndroidStatusBarNotifications.class);
   PendingIntent contentIntent = PendingIntent.getActivity(AndroidStatusBarNotifications.this, 0, notificationIntent, 0);

   notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
   
   //Pass the Notification to the NotificationManager
   mNotificationManager.notify(ID_My_Notification, notification);
   
  }};
}

相關文章:
- 如何取消狀態欄通知(status bar notification)