Android知识点复习3(BroadcastReceiver)

广播 BroadcastReceiver

监听 / 接收 广播消息。Android不同组件间的通信（应用内或者不同应用之间）

1.自定义接收器：继承BroadcastReceivre类

public class WBroadcastReceiver extends BroadcastReceiver {
   @Override public void onReceive(Context context, Intent intent) 
         { 
         //通过Intent传值区分不同的广播和具体的传参
         }
     }

1.1静态注册接收器

<receiver WBroadcastReceiver android:name=".WBroadcastReceiver " > 
   <intent-filter>
        <action android:name="" />
    </intent-filter>
</receiver>

1.2动态注册接收器

//注册
WBroadcastReceiver wBroadcastReceiver = new WBroadcastReceiver ();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(""); 
registerReceiver(wBroadcastReceiver , intentFilter);
//销毁
unregisterReceiver(wBroadcastReceiver );

2.发送广播

2.1普通广播

Intent intent = new Intent();
intent.setAction("");
sendBroadcast(intent);

2.2系统广播

即系统内部的广播

2.3有序广播

即有顺序的普通广播

sendOrderedBroadcast(intent);

2.4本地广播

//注册
LocalBroadcastManager.getInstance(Context).registerReceiver(receiver, filter);
//销毁
LocalBroadcastManager.getInstance(Context).unregisterReceiver(receiver, filter);
//发送
LocalBroadcastManager.getInstance(Context).sendBroadcast(intent);

3.未知，待补充。。。