Question

为什么以下Ordered Broadcast会在Android Oreo中失败，除非我专门设置了包名？

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);

如果未设置包名称，则EXTRA_SUPPORTED_LANGUAGES将丢失。

我最近asked a bounty question我的遗留代码＆＃39;没有设置软件包名称，在Oreo中失败，但在以前的Android版本上成功运行。

检查了所有behavioural changes in API 26后，我什么都看不到可以解释这一点。

有人可以解释可能的原因吗？

注意：示例代码和问题假定设备已安装Google's 'Now'应用程序以提供RecognitionService

Answer 1

好的，我重现了这个问题。 1234结果代码是一个红色的鲱鱼 - 看起来RecognizerIntent背后的进程没有设置结果代码，因此您获得了初始代码。

但是，您确实在Android 8.1（并且可能是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

你在清单上注册了一个接收者，我们不打算给你播放，因为你在后台＆＃34;错误。

这种经过轻度测试的sendImplicitOrderedBroadcast()方法解决了这个问题，同时原则上维护了接收器的顺序（按优先级递减）：

  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);
    }
  }

我冒了filing an issue。

Oreo中的sendOrderedBroadcast setPackage要求

1 个答案: