android - 在同一个类中发送/接收意图

Question

简单的问题，是否可以send/receive通过同一类的意图LocalBroadcastReceiver？如果是，你能给我举个例子吗？

Answer 1

是的，LocalBroadcastReceiver 无处不在。这是一个示例Activity：

BroadcastReceiver localBroadcastReciever = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        Log.d("BroadcastReceiver", "Message received " + intent.getAction());
    }
};

@Override
protected void onStart()
{
    super.onStart();
    final LocalBroadcastManager localBroadcastManager =
        LocalBroadcastManager.getInstance(this);
    final IntentFilter localFilter = new IntentFilter();
    localFilter.addAction("com.my.package.intent.ACTION_NAME_HERE");
    localBroadcastManager.registerReceiver(localBroadcastReceiver, localFilter);
}

@Override
protected void onStop()
{
    super.onStop();
    final LocalBroadcastManager localBroadcastManager =
        LocalBroadcastManager.getInstance(this);
    // Make sure to unregister!!
    localBroadcastManager.unregisterReceiver(localBroadcastReceiver);
}

某处，在您的应用程序的相同Activity或其他地方（没关系）：

final LocalBroadcastManager localBroadcastManager =
    LocalBroadcastManager.getInstance(context);
localBroadcastManager.sendBroadcast(new Intent("com.my.package.intent.ACTION_NAME_HERE"));

当然，您可以使用intent.putExtra添加任何附加数据或使用多个操作来区分广播消息。