使用 Jack 对 Java 8 的支持,我希望能够编写类似的内容:
public void onReceive(Context context, Intent intent) {
if (!intent.getAction().equals(ACTION_BINGO)) return;
Log.d(TAG, "Bingo!");
}
...
registerReceiver(this::onReceive, INTENT_FILTER_BINGO);
不幸的是,这是不可能的。虽然 onReceive()
是 BroadcastReceiver
特有的抽象方法,但那东西不是一个接口(interface),而是一个抽象类>,它似乎无法被 lambda 表达式替换。有什么建议可以解决这个问题吗?
最佳答案
使用this answer中概述的技巧,这是我得到的:
public class BroadcastReceiver extends android.content.BroadcastReceiver {
private final BiConsumer<Context, Intent> receiver;
public BroadcastReceiver(final BiConsumer<Context, Intent> onReceive) {
receiver = onReceive;
}
@Override
public void onReceive(Context context, Intent intent) {
if (receiver == null) {
throw new UnsupportedOperationException("Not yet implemented");
}
receiver.accept(context, intent);
}
}
不像我预期的那么简洁,但更好:
BroadcastReceiver receiver = new BroadcastReceiver(this::onReceive);
registerReceiver(receiver, INTENT_FILTER_BINGO);
关于java - 使用方法引用定义 BroadcastReceiver.onReceive,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40800926/