Question

我正在使用Android Vision API进行QR码扫描，除了Android 2.3.x设备外，它在几个Android设备和版本上运行良好。当我打开QR码扫描仪时，会显示一个对话框，表明google-play-services崩溃了。在Logcat中，我看到以下错误。

FATAL EXCEPTION: AsyncOperationService[VisionDependencyIntentService]
java.lang.NoSuchMethodError: android.content.SharedPreferences.getStringSet
        at com.google.android.gms.vision.service.VisionDependencyIntentService.b(SourceFile:185)
        at com.google.android.gms.vision.service.VisionDependencyIntentService.a(SourceFile:174)
        at com.google.android.gms.vision.service.a.a.a(SourceFile:45)
        at com.google.android.gms.chimera.f.run(SourceFile:179)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
        at java.lang.Thread.run(Thread.java:1019)

这是我片段的代码

@Override
public void onViewCreated(View view, Bundle savedInstanceState)
{
  super.onViewCreated(view, savedInstanceState);

  Activity activity = getActivity();

  preview = (CameraSourcePreview) view.findViewById(R.id.preview);

  int connectionResult = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(activity);
  if (connectionResult == ConnectionResult.SUCCESS)
  {
     // create a barcode detector.
     BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(activity).setBarcodeFormats(Barcode.QR_CODE)
           .build();

     // create a processor to filter qr-codes and a tracker to handle the selected qr-code.
     barcodeDetector.setProcessor(new QrCodeProcessor(barcodeDetector, new QrCodeTracker(this)));

     if (barcodeDetector.isOperational())
     {
        // Creates and starts the camera.
        cameraSource = new CameraSource.Builder(activity, barcodeDetector)
              .setFacing(CameraSource.CAMERA_FACING_BACK).setRequestedPreviewSize(1600, 1024)
              .setRequestedFps(15.0f).build();
     }
     else
     {
        showAlert(R.string.QrCodeScanner_alert_play_services_not_operational_header,
              R.string.QrCodeScanner_alert_play_services_not_operational_body);
     }
  }
  else
  {
     PlatformUtil.handlePlayServicesError(activity, connectionResult);
  }
}

根据Google Play服务指南，应支持Android 2.3： https://developers.google.com/android/guides/setup

我还尝试释放一些空间并按照Google Vision barcode library not found中的建议重置工厂，但没有任何成功。

有人知道我做错了吗？

Answer 1

看起来这个特定的API依赖于SharedPreferences.getStringSet()，根据Android docs，它仅在API 11（Android v3.0 Honeycomb）中引入。

您将无法在2.x设备上使用此功能。

Android Play服务在Android 2.3 Vision API上崩溃

1 个答案: