Bilddatei ist leer auf der Rückkehr von Aktivitäten auf Android

Question

Mit Code aus dieser Antwort: https://stackoverflow.com/a/12347567/734687

ich den folgenden Code verwende ein Benutzer einreicht ein Bild zu meiner Android-Anwendung zu lassen.

private void openImageIntent() { 
    File outputFile = null; 
    try { 
     outputFile = File.createTempFile("tmp", "face", getCacheDir()); 
    } catch (IOException pE) { 
     pE.printStackTrace(); 
    } 
    mOutputFileUri = Uri.fromFile(outputFile); 

    // Camera. 
    final List<Intent> cameraIntents = new ArrayList<Intent>(); 
    final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
    final PackageManager packageManager = getPackageManager(); 
    final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0); 
    for(ResolveInfo res : listCam) { 
     final String packageName = res.activityInfo.packageName; 
     final Intent intent = new Intent(captureIntent); 
     intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name)); 
     intent.setPackage(packageName); 
     intent.putExtra(MediaStore.EXTRA_OUTPUT, mOutputFileUri); 
     cameraIntents.add(intent); 
    } 

    // Filesystem. 
    final Intent galleryIntent = new Intent(); 
    galleryIntent.setType("image/*"); 
    galleryIntent.setAction(Intent.ACTION_PICK); 

    // Chooser of filesystem options. 
    final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source"); 

    // Add the camera options. 
    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[cameraIntents.size()])); 

    startActivityForResult(chooserIntent, 42); //XXX 42? 
} 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode == RESULT_OK) { 
     if (requestCode == 42) { 
      final boolean isCamera; 
      if (data == null) { 
       isCamera = true; 
      } else { 
       final String action = data.getAction(); 
       if (action == null) { 
        isCamera = false; 
       } else { 
        isCamera = action.equals(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
       } 
      } 
      Uri selectedImageUri = null; 
      if (isCamera) { 
       selectedImageUri = mOutputFileUri; 
      } else { 
       selectedImageUri = data == null ? null : data.getData(); 
      } 
      loadFacePicture(selectedImageUri); 
     } 
    } 
} 

jedoch die Uri selectedImageUri führt zu einer leeren Datei auf loadFacePicture(selectedImageUri);

Was tat ich verpasst?

Answer 1

Dies ist, was ich am Ende tun. Diese schien die Quelle des Problems zu sein:

intent.putExtra(MediaStore.EXTRA_OUTPUT, mOutputFileUri); 

Der eigentliche Code:

private void openImageIntent() { 
     try { 
      outputFile = File.createTempFile("tmp", ".jpg", getCacheDir()); 
     } catch (IOException pE) { 
      pE.printStackTrace(); 
     } 
     mOutputFileUri = Uri.fromFile(outputFile); 

     // Camera. 
     final List<Intent> cameraIntents = new ArrayList<Intent>(); 
     final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
     final PackageManager packageManager = getPackageManager(); 
     final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0); 
     for(ResolveInfo res : listCam) { 
      final String packageName = res.activityInfo.packageName; 
      final Intent intent = new Intent(captureIntent); 
      intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name)); 
      intent.setPackage(packageName); 
      cameraIntents.add(intent); 
     } 

     // Filesystem. 
     final Intent galleryIntent = new Intent(); 
     galleryIntent.setType("image/*"); 
     galleryIntent.setAction(Intent.ACTION_PICK); 

     // Chooser of filesystem options. 
     final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source"); 

     // Add the camera options. 
     chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[cameraIntents.size()])); 

     startActivityForResult(chooserIntent, 42); 
    } 


@Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == RESULT_OK) { 
      if (requestCode == 42) { 
       Bitmap bmp = null; 
       if (data.hasExtra("data")) { 
        Bundle extras = data.getExtras(); 
        bmp = (Bitmap) extras.get("data"); 
       } else { 
        AssetFileDescriptor fd = null; 
        try { 
         fd = getContentResolver().openAssetFileDescriptor(data.getData(), "r"); 
        } catch (FileNotFoundException pE) { 
         pE.printStackTrace(); 
        } 
        bmp = BitmapFactory.decodeFileDescriptor(fd.getFileDescriptor()); 
       } 
       try { 
         FileOutputStream out = new FileOutputStream(new File(mOutputFileUri.getPath())); 
         bmp.compress(Bitmap.CompressFormat.JPEG, 100, out); 
         out.flush(); 
         out.close(); 
        } catch (Exception e) { 
         e.printStackTrace(); 
        } 
       loadFacePicture(mOutputFileUri); 
      } 
     } 
    }