LocalBroadcastManager 使用

LocalBroadcastManager 簡單的說就是intra-app的Broadcast 發送，用來避免Broadcast  發送到外部所造成的security issue(當然你也可以指定target或是用Permission拉...)。 下面是Android 上所提到的優點：
   

• You know that the data you are broadcasting won't leave your app, so don't need to worry about leaking private data.
• It is not possible for other applications to send these broadcasts to your app, so you don't need to worry about having security holes they can exploit.
• It is more efficient than sending a global broadcast through the system. 

 簡單的說就是app內部的 Broadcast系統，不會發送到外部也不會被外部的Broadcast影響。唯一一個小小的缺點就是要自行import  Android Compatibility package， 要記得把 android-support-v4.jar 放到libs下即可。  可以看一下官方的文件LocalBroadcastManager  ，就幾個簡單的API而已。
範例

LocalBroadcastManager mLocalBroadcastManager;
public void onCreate(Bundle savedInstanceState) {
    mLocalBroadcastManager = LocalBroadcastManager.getInstance(getApplicationContext());   //要先getInstance
}

protected void onPause() {
    mLocalBroadcastManager.unregisterReceiver(TTLNotifyReceiver);
}

protected void onResume() {  
    IntentFilter filter = new IntentFilter("com.test.hello");
    mLocalBroadcastManager.registerReceiver(receiver, filter);
}

private BroadcastReceiver receiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
 //rece the Intent
    }
};