android广播的使用方式

private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action != null) {
switch (action) {
case REFRESH:
onRefresh(context, intent);//这里就是我们广播所要做的事的一个方法
break;
}
}
}
};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
IntentFilter filter = new IntentFilter(REFRESH);
registerReceiver(mReceiver, filter);   //注册广播
}

@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(mReceiver);   //销毁广播
}

public static final String REFRESH = "REFRESH";

Intent intent = new Intent(REFRESH);
APPContext.getInstance().sendBroadcast(intent); //这两句是发送广播