Android网站上的相机意图无法工作 - Android

Question

在这一行：BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions); 抛出了一个文件未找到的异常。以下是Logcat日志：

01-29 23:56:12.296: E/BitmapFactory(30046): Unable to decode stream: java.io.FileNotFoundException: /file:/storage/emulated/0/Pictures/JPEG_20140129_235544_1090805596.jpg: open failed: ENOENT (No such file or directory)

这是在setPic()函数内部。但是文件是在启动intent之前保存并添加到相册的，所以在onActivityResult之前应该已经存在了。您看到任何问题吗？此代码摘自Android开发者网站 http://developer.android.com/training/camera/photobasics.html

    static final int REQUEST_TAKE_PHOTO = 1001;

              private void dispatchTakePictureIntent() {
                  Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                  // Ensure that there's a camera activity to handle the intent
                  if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
                      // Create the File where the photo should go
                      File photoFile = null;
                      try {
                          photoFile = createImageFile();
                      } catch (IOException ex) {
                          // Error occurred while creating the File
                      }
                      // Continue only if the File was successfully created
                      if (photoFile != null) {
                          takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                                  Uri.fromFile(photoFile));
                          startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
                      }
                  }
              }

              private void galleryAddPic() {
                    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                    File f = new File(mCurrentPhotoPath);
                    Uri contentUri = Uri.fromFile(f);
                    mediaScanIntent.setData(contentUri);
                    this.sendBroadcast(mediaScanIntent);
                }

编辑 下面的代码块来自onActivityResult:

else if ((requestCode == REQUEST_TAKE_PHOTO) && (resultcode == -1)){
                                     // Uri selectedImage = imageUri;
                                              mProfilePicPath = mCurrentPhotoPath;

                                              mPortraitPhoto = setPic();
                                              TextView tv = (TextView) findViewById(id.ProfilePicText);
                                tv.setText(mProfilePicPath);
                                          //}
                                     // }
                          }
                  }catch(Exception ex){
                          Log.d("shkdghrfb", ex.toString());
                  }
          }

              String mCurrentPhotoPath;

              private Bitmap setPic() {
                    // Get the dimensions of the View

                    // Get the dimensions of the bitmap
                    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
                    bmOptions.inJustDecodeBounds = true;
                    BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
                    int photoW = bmOptions.outWidth;
                    int photoH = bmOptions.outHeight;

                    // Determine how much to scale down the image
                    //int scaleFactor = Math.min(photoW/targetW, photoH/targetH);

                    // Decode the image file into a Bitmap sized to fill the View
                    bmOptions.inJustDecodeBounds = false;
                    bmOptions.inSampleSize = 5;
                    bmOptions.inPurgeable = true;

                    Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
                    //mImageView.setImageBitmap(bitmap);
                    return bitmap;
                }

              private File createImageFile() throws IOException {
                  // Create an image file name
                  String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
                  String imageFileName = "JPEG_" + timeStamp + "_";
                  File storageDir = Environment.getExternalStoragePublicDirectory(
                          Environment.DIRECTORY_PICTURES);
                  File image = File.createTempFile(
                      imageFileName,  /* prefix */
                      ".jpg",         /* suffix */
                      storageDir      /* directory */
                  );

                  // Save a file: path for use with ACTION_VIEW intents
                  mCurrentPhotoPath = "file:" + image.getAbsolutePath();
                  galleryAddPic();
                  return image;
              }

我添加的清单权限：

<uses-permission android:name="android.permission.CAMERA" android:required="false" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

- user3164083

---

这是你今天关于相机提出的第三个问题了，也许你应该多思考一下再问问题……当然，如果你想学习的话。 - nsL

你在清单文件中添加了读写外部存储权限吗？ - Piyush

@nsL 我之前尝试了很多个小时，也尝试了很多不同的方法，但在这之前都没有解决这个问题。这个问题已经困扰我一个星期了。我曾经用一种在我的另一部手机上可行的方式完成了它，但是在其他手机上却不行，所以不得不进行更改。 - user3164083

@nsL 我是一名学生，独自承担了制作一个应用程序的工作。 - user3164083

@PiyushGupta，我现在已经将我的权限添加到问题底部。谢谢。 - user3164083

Answer 1

我认为在文件名中包含“file”不是正确的文件名，因此将其删除。将mCurrentPhotoPath = "file:" + image.getAbsolutePath();更改为mCurrentPhotoPath = image.getAbsolutePath();。如果这只是一个临时解决方案，请告诉我。这很重要，它需要在所有兼容的设备上正常工作。

- user3164083