Android Notification 的使用

在這里把對android notification經常會用到的用法大概說明一下，由於時間問題，關於不同系統中的兼容性問題，還不及做太多的測試。什么時候有時間再補上。
實現了酷狗的Notification中播放器的界面
還是那句話：有時間再把關於Notification的用法和要注意的東西補完整。

package com.lee.notification;

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.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Build.VERSION;
import android.util.Log;
import android.widget.RemoteViews;

public class NotificationMusicBox {
    
    private String TAG = "NotificationMusicBox_Task"; 
    
    private int Notification_Id = 999;
    private Notification notification;
    private NotificationManager notificationManager;
    private Activity mActivity;
    private RemoteViews bigContentView,contentView;
    private int sysVersion = Integer.parseInt(VERSION.SDK);  
    
    public NotificationMusicBox(Activity activity){
        this.mActivity = activity;
        
        init();
    }
    
    /**
     * 初始化操作
     *     notification.contentView 和 notification.bigContentView的不同之處：
     *    notification.contentView是單行的通知
     *    notification.bigContentView可以顯示更多內容的通知
     *    
     *    在4.1系統的時候
     *    在當前的notification不是在通知欄頂部的時候是顯示notification.contentView布局
     *    在當前的notification是在通知欄的頂部的時候顯示的是notification.bigContentView布局
     *    
     *    在4.0系統的時候
     *    關於notification的bigContentView是在Jelly Bean 4.1之中加入的,在4.1之前的話bigContentView屬性是無效的。
     *    
     *    只有在在sdk3.0以上的系統中，通知欄中的按鈕點擊事件才能響應，以下的做不到。
     *    要加入按鈕點擊事件監聽的話,必須要做手機的系統判斷。再使用RemoteViews的setOnClickPendingIntent的方法
     *    
     *    在3.0之前推薦的通知欄寫法是
     *    notification = new Notification(R.drawable.bg_albumdetail_default, "start listener Music", System.currentTimeMillis());
     *    notification.setLatestEventInfo(this.mActivity, "this is test", "ok!", contentPendingIntent);
     *    此時notification的logo是實例化Notification中的 "R.drawable.bg_albumdetail_default"
     *    實際內容是通過setLatestEventInfo(this.mActivity, "this is test", "ok!", contentPendingIntent);
     */
    private void init(){
        Log.d(TAG, String.valueOf(sysVersion));
        
        //設置基本的notification
        initNotification();
        
        //時間匆忙，還不及去測試不同系統的兼容性
        if(sysVersion>=15){
            setContetView();
            setBigContentView();
        }
    }
    
    /**
     * 初始化Notification
     * 此處做Notification的基本設置
     */
    private void initNotification(){
        //整個notification的點擊事件
        Intent contentIntent = new Intent(this.mActivity, NotificationShow.class);
        contentIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_NEW_TASK); 
        contentIntent.putExtra("Key", "尼瑪");
        PendingIntent contentPendingIntent = PendingIntent.getActivity(this.mActivity,R.string.app_name,contentIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        
        //獲取notification管理的實例
        notificationManager = (NotificationManager) this.mActivity.getSystemService(Context.NOTIFICATION_SERVICE);
        
        //設置notification
        notification = new Notification(R.drawable.bg_albumdetail_default, "start listener Music", System.currentTimeMillis());
        notification.setLatestEventInfo(this.mActivity, "this is test", "ok!", contentPendingIntent);
        
        notification.flags = Notification.FLAG_NO_CLEAR;
        notification.contentIntent = contentPendingIntent;
    }
    
    /**
     * 設置contentView
     * 注：只有在在sdk3.0以上的系統中，通知欄中的按鈕點擊事件才能響應，以下的做不到。
     */
    private void setContetView(){
        //布局文件(小)
        contentView = new RemoteViews(this.mActivity.getPackageName(),R.layout.notification_view);
        contentView.setTextViewText(R.id.tv_music, "Hello World!");
        notification.contentView = contentView;
    }
    
    /**
     * 設置BigContentView
     * 在Jelly Bean 中加入
     * 在此可以加入按鈕的事件監聽
     */
    private void setBigContentView(){
        //布局文件(大)
        bigContentView = new RemoteViews(this.mActivity.getPackageName(),R.layout.notification_playmusic);
        bigContentView.setTextViewText(R.id.tv_music, "Hello World!");
        
        //上一頁
        Intent lastIntent = new Intent("com.lee.notificationReceiver");
        PendingIntent lastPendingIntent = PendingIntent.getBroadcast(this.mActivity,0,lastIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        bigContentView.setOnClickPendingIntent(R.id.ib_last, lastPendingIntent);
        
        //播放或暫停
        Intent playOrPauseIntent = new Intent(this.mActivity,NotificationShow.class);
        PendingIntent playOrPausePendingIntent = PendingIntent.getBroadcast(this.mActivity,1,playOrPauseIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        bigContentView.setOnClickPendingIntent(R.id.ib_playOrPause, playOrPausePendingIntent);
        
        //下一頁
        Intent nextIntent = new Intent(this.mActivity,NotificationShow.class);
        PendingIntent nextPendingIntent = PendingIntent.getActivity(this.mActivity,1,nextIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        bigContentView.setOnClickPendingIntent(R.id.ib_next, nextPendingIntent);
        
        notification.bigContentView = bigContentView;
    }
    
    /**
     * 顯示notificationMusicBox
     */
    public void notifyMusicBox(){
        notificationManager.notify(Notification_Id, notification);
    }
}