Android网站的相机意图不起作用 - Android答案

【问题标题】：camera intent from Android website not working - AndroidAndroid网站的相机意图不起作用 - Android
【发布时间】：2014-01-29 11:01:51
【问题描述】：

在这一行：BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions); 它会抛出一个 fileNotFound 异常。这是Logcat：

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)

在 setPic();但是文件在启动意图期间被保存并添加到库中，所以在onActivityResult之前，所以它应该在那里。你看有什么问题吗？此代码取自 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);
                }

EDIT下一个代码块来自 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;
              }

我已添加的清单权限：

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

【问题讨论】：

这是关于您今天早上制作的相机的第三个问题，也许您应该尝试多想，少问....至少如果您当然想学习的话。
你是否在manifest文件中添加了读写外部存储权限？
@nsL 在今天之前我已经尝试了很多小时。在此之前，我尝试了许多不同的方法。这个问题已经给我带来了一个星期的麻烦。我做了一种不同的方式，可以在我的另一部手机上使用，但不是某些手机，所以不得不改变它。
@nsL 我是一名学生，从事自己制作应用程序的工作。
@PiyushGupta 我现在已将我的权限添加到问题的底部。谢谢。

标签： android android-intent android-camera

【解决方案1】：

我认为文件名中的“文件”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();。如果这只是一个黑客修复，请告诉我。这适用于所有兼容的设备，这一点很重要。

【讨论】：