我有一个需要捕获两个不同广播的 Android Activity 。我目前的方法是在 Activity 中有一个 BroadcastReceiver 并用它捕获两个广播:

public class MyActivity extends Activity {
    private MyActivity.BroadcastListener mBroadcastListener;
    private boolean mIsActivityPaused = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mylayout);

        // Create the broadcast listener and register the filters
        mIsActivityPaused = false;
        mBroadcastListener = new BroadcastListener();

        IntentFilter filter = new IntentFilter();
        filter.addAction(Params.INTENT_REFRESH);
        filter.addAction(Params.INTENT_UPDATE);
        registerReceiver(mBroadcastListener, filter);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mIsActivityPaused = false;
    }

    @Override
    protected void onPause() {
        super.onPause();
        mIsActivityPaused = true;
    }

    @Override
    protected void onDestroy() {
        unregisterReceiver(mBroadcastListener);
        super.onDestroy();
    }

    private void refresh() {
        // refresh
    }

    private void update() {
        // update
    }

    private class BroadcastListener extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(Params.INTENT_REFRESH && !mIsActivityPaused)) {
                refresh();
            } else if (intent.getAction().equals(Params.INTENT_UPDATE)) {
                update();
            }
        }
    }
}

我只想在我的 Activity 在屏幕上可见时执行 refresh()，但我想捕获 INTENT_UPDATE 并执行 update() 在 Activity 的整个生命周期内，无论 Activity 是否可见。

我没有找到任何方法来取消注册我在 onCreate 中注册的两个过滤器中的一个，所以我使用一个标志来启用或禁用当 执行时要执行的操作INTENT_REFRESH 广播被​​捕获，具体取决于 Activity 的状态。

问题是:这是正确的方法吗？

或者，最好有两个单独的广播接收器，如下所示:

public class MyActivity extends Activity {
    private MyActivity.BroadcastListenerRefresh mBroadcastListenerRefresh;
    private MyActivity.BroadcastListenerUpdate mBroadcastListenerUpdate;
    private boolean mIsBroadcastListenerRefreshRegistered = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Create the broadcast listeners
        mBroadcastListenerRefresh = new BroadcastListenerRefresh();
        mBroadcastListenerUpdate = new BroadcastListenerUpdate();

        registerReceiver(mBroadcastListenerRefresh, new IntentFilter(Params.INTENT_REFRESH));
        registerReceiver(mBroadcastListenerUpdate, new IntentFilter(Params.INTENT_UPDATE));
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mBroadcastListenerRefresh != null && !mIsBroadcastListenerRefreshRegistered) {
            registerReceiver(mBroadcastListenerRefresh, new IntentFilter(Params.INTENT_REFRESH));
            mIsBroadcastListenerRefreshRegistered = true;
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mBroadcastListenerRefresh != null && mIsBroadcastListenerRefreshRegistered) {
            unregisterReceiver(mBroadcastListenerRefresh);
            mIsBroadcastListenerRefreshRegistered = false;
        }
    }

    @Override
    protected void onDestroy() {
        unregisterReceiver(mBroadcastListenerRefresh);
        unregisterReceiver(mBroadcastListenerUpdate);
        super.onDestroy();
    }

    private void refresh() {
        // refresh
    }

    private void update() {
        // update
    }

    private class BroadcastListenerRefresh extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(Params.INTENT_REFRESH)) {
                refresh();
            }
        }
    }

    private class BroadcastListenerUpdate extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(Params.INTENT_UPDATE)) {
                update();
            }
        }
    }
}

哪一个性能更好？

最佳答案

相反，您可以提供两种不同的 Intent 过滤器:

只过滤刷新

IntentFilter filterRefresh = new IntentFilter(Params.INTENT_REFRESH);

过滤刷新和更新

IntentFilter filterRefreshUpdate = new IntentFilter();
filterRefreshUpdate.addAction(Params.INTENT_REFRESH);
filterRefreshUpdate.addAction(Params.INTENT_UPDATE);

现在您可以通过注册和取消注册所需的过滤器来在 Intent 过滤器之间切换，但您的接收器的实现将是相同的

关于android - 具有多个过滤器或多个广播接收器的广播接收器？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9128103/