发送广播Broadcast

1.  发送：

Intent intent=new Intent();

intent.putExtra("str", str);

intent.setAction("。。。");

sendBroadcast(intent);

2.接收：

a.注册广播接收器

receiver=new MyReceiver();
IntentFilter filter=new IntentFilter();
filter.addAction("relay");
getActivity().registerReceiver(receiver, filter);

b.接收广播

public class MyReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent2) {
// TODO Auto-generated method stub
Bundle bundle=intent2.getExtras();
str=bundle.getString("str");
showData(str);
}
}  

跟着上述步骤，就可以实现广播了