13 BroadcastReceiver

1. 复写BroadcastReceiver中的onReceive()方法。
2. intent-filter过滤器：
   

   <intent-filter>
   <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
   </intent-filter>
   </receiver>

3. 发送intent
   protected static final String ACTION = "com.szy.broadcast.ACTION";
   

   public void onClick(View v)
   {
   Intent intent=new Intent();
   intent.setAction(ACTION);
   sendBroadcast(intent);
   }

4. 生命周期：每次发送的时候都创建，执行完之后都销毁。
   
   

在程序中注册，而不在xml配置文件中注册：

protected static final String ACTION = "com.szy.broadcast.ACTION";

private SecondReceiver receiver;

 

//发送消息

public void onClick(View v)
{
Intent intent=new Intent();
intent.setAction(ACTION);
sendBroadcast(intent);
}

//注册广播

public void onClick(View v)
{
receiver=new SecondReceiver();
IntentFilter filter=new IntentFilter();
filter.addAction(ACTION);
registerReceiver(receiver, filter);
}

//注销广播

public void onClick(View v)
{
unregisterReceiver(receiver);
}