Oreo 中的 sendOrderedBroadcast setPackage 要求

Question

为什么以下 Ordered Broadcast 在 Android Oreo 中会失败，除非我专门设置包名称？

final Intent vrIntent = new Intent(RecognizerIntent.ACTION_GET_LANGUAGE_DETAILS);

// Setting the package it will work. Omitting, it will fail
// vrIntent.setPackage("com.google.android.googlequicksearchbox");

getContext().sendOrderedBroadcast(vrIntent, null, new BroadcastReceiver() {

    @Override
    public void onReceive(final Context context, final Intent intent) {

                // final Bundle bundle = intent.getExtras();
                final Bundle bundle = getResultExtras(true);

                if (bundle != null) {

                    if (bundle.containsKey(RecognizerIntent.EXTRA_SUPPORTED_LANGUAGES)) {
                        Log.i("TAG", "onReceive: EXTRA_SUPPORTED_LANGUAGES present");

                        final ArrayList<String> vrStringLocales = bundle.getStringArrayList(
                                RecognizerIntent.EXTRA_SUPPORTED_LANGUAGES);

                        Log.i("TAG", "onReceive: EXTRA_SUPPORTED_LANGUAGES size: " + vrStringLocales.size());

                    } else {
                        Log.w("TAG", "onReceive: missing EXTRA_SUPPORTED_LANGUAGES");
                    }

                } else {
                    Log.w("TAG", "onReceive: Bundle null");
                }

}, null, 1234, null, null);

如果不设置包名，EXTRA_SUPPORTED_LANGUAGES会丢失

我最近我的 'legacy code' 没有设置包名称，在 Oreo 中失败了，但在以前的 Android 版本上运行成功。

检查了所有 behavioural changes in API 26 我看不出任何可以解释这一点的东西。

任何人都可以阐明可能的原因吗？

注意：示例代码和问题假定设备具有 Google's 'Now' application installed to provide the RecognitionService

Answer 1

好的，我重现了问题。 1234 结果代码是一个转移注意力的问题——看起来 RecognizerIntent 背后的过程没有设置结果代码，所以你得到了初始代码。

但是，您确实在 Android 8.1（大概是 8.0）上收到此错误消息：

W/BroadcastQueue: Background execution not allowed: receiving Intent { act=android.speech.action.GET_LANGUAGE_DETAILS flg=0x10 } to com.google.android.googlequicksearchbox/com.google.android.voicesearch.intentapi.IntentApiReceiver

那是 "you registered a receiver in the manifest, and we're not going to give you the broadcast, because you are in the background" 错误。

这个经过简单测试的 sendImplicitOrderedBroadcast() 方法可以解决这个问题，同时原则上保持接收者的顺序（按优先级降序）：

  private void sendImplicitOrderedBroadcast(Intent i, String receiverPermission,
                                            BroadcastReceiver resultReceiver,
                                            Handler scheduler, int initialCode,
                                            String initialData,
                                            Bundle initialExtras) {
    PackageManager pm=getPackageManager();
    List<ResolveInfo> matches=pm.queryBroadcastReceivers(i, 0);

    Collections.sort(matches,
      (left, right) -> right.filter.getPriority()-left.filter.getPriority());

    for (ResolveInfo resolveInfo : matches) {
      Intent explicit=new Intent(i);
      ComponentName cn=
        new ComponentName(resolveInfo.activityInfo.applicationInfo.packageName,
          resolveInfo.activityInfo.name);

      explicit.setComponent(cn);
      sendOrderedBroadcast(explicit, receiverPermission, resultReceiver,
        scheduler, initialCode, initialData, initialExtras);
    }
  }

冒昧filing an issue.

Oreo 中的 sendOrderedBroadcast setPackage 要求

sendOrderedBroadcast setPackage requirement in Oreo

java

android

broadcastreceiver

google-voice-search