安卓第一行代码之全局大喇叭BroadCast

接收广播：

动态接收：

1.设置IntentFilter        IntentFilter filter = new IntentFilter ();   filter.addAction("intent.action.XXX");

2.编写继承自BroadCastReceiver的类。重写OnReceive函数 ,创建实例

public class Receiver extends BroadCastReceiver

{

    public class onReceive(Context context ,Intent intent)

    {

        xxxxx

    }

}

Receiver  receiver = new Receiver();

3.onCreate中注册监听

registerReceiver(receiver ,filter);

4.onDestory中注销监听

unregisterReceiver(receiver );

静态接收：

在manifest中注册

    android:name = ".xxxReceiver"

    android:exported ="true"

    android:enabled = "true">

   

        

    

代码实现：

public class Receiver extends BroadCastReceiver

{

    public class onReceive(Context context ,Intent intent)

    {

        xxxxx

    }

}

发送一般广播：

Intent intent = new Intent ("intent.xxxxx");

Bundle xx = new Bundle();

xx.putExtra("key","value");

intent.setData(xx);

sendBroadCast(intent);

发送有序广播：

sendOrderedBroadCast(intent,null);

在高级别的receiver里可以取消继续广播 AbortBroadCast();

本地广播其实一样，但可以保证广播不会发送到其他应用。只不过要实例化一个LocalBroadCastManager：

LocalBroadCastManager  localManager  = LocalBroadCastManager.getInstance(this);

注册：localManager .registerReceiver(reciver,intent);

注销： localManager.unregisterReciver(reciver,intent);

发送： localManager.sendBroadCast（intent）；