从相机和图库上传在所有版本中都无法正常工作
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【中文标题】从相机和图库上传在所有版本中都无法正常工作【英文标题】：Upload from camera and gallery is not working properly in all the versions 【发布时间】：2016-09-11 02:51:21 【问题描述】：我正在尝试一些教程和示例代码，以便从图库或相机中获取图像，然后裁剪图像并将其上传到服务器。我在该代码中实现了该代码，但面临的问题很少。
-
在 Lollipop 之前的设备中，当我使用照片应用裁剪图像时，图像不会反映在图像视图中，但会在图像保存时显示消息..
在 nexus 手机中，相机和图库均无法正常工作。
当我裁剪图像时，在少数设备上的 5.0 版本得到的图像如下图所示
下面是我的代码sn-p。`
public void getPhoto()
final String[] items = new String[] "Take from camera",
"Select from gallery" ;
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.select_dialog_item, items);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Select Image");
builder.setAdapter(adapter, new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int item) // pick from
// camera
if (item == 0)
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(
"android.intent.extras.CAMERA_FACING",
android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT);
mImageCaptureUri = Uri.fromFile(new File(Environment
.getExternalStorageDirectory(), "tmp_avatar_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg"));
intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,
mImageCaptureUri);
try
intent.putExtra("return-data", true);
startActivityForResult(intent, PICK_FROM_CAMERA);
catch (ActivityNotFoundException e)
e.printStackTrace();
else // pick from file
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
// startActivityForResult(intent, SELECT_PICTURE);
startActivityForResult(intent, PICK_FROM_FILE);
);
final AlertDialog dialog = builder.create();
dialog.show();
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK)
return;
switch (requestCode)
case PICK_FROM_CAMERA:
doCrop();
break;
case PICK_FROM_FILE:
mImageCaptureUri = data.getData();
doCrop();
break;
case CROP_FROM_CAMERA:
Bundle extras = data.getExtras();
if (extras != null)
photo = extras.getParcelable("data");
profile_image = encodeTobase64(photo);
saveType = "photo";
try
JSONObject obj = new JSONObject();
obj.put("user_id", user_id);
obj.put("mode", saveType);
obj.put("photo", profile_image);
obj.put("is_profile", 1);
saveResponse(obj);
catch (Exception e)
// TODO: handle exception
e.printStackTrace();
File f = new File(mImageCaptureUri.getPath());
if (f.exists())
f.delete();
break;
private void doCrop()
final ArrayList<CropOption> cropOptions = new ArrayList<CropOption>();
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setType("image/*");
List<ResolveInfo> list = getActivity().getPackageManager()
.queryIntentActivities(intent, 0);
int size = list.size();
if (size == 0)
Toast.makeText(getActivity(), "Can not find image crop app",
Toast.LENGTH_SHORT).show();
return;
else
intent.setData(mImageCaptureUri);
intent.putExtra("crop", "true");
intent.putExtra("outputX", 300);
intent.putExtra("outputY", 300);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra("circleCrop", new String(""));
intent.putExtra("return-data", true);
if (size == 1)
Intent i = new Intent(intent);
ResolveInfo res = list.get(0);
i.setComponent(new ComponentName(res.activityInfo.packageName,
res.activityInfo.name));
startActivityForResult(i, CROP_FROM_CAMERA);
else
for (ResolveInfo res : list)
final CropOption co = new CropOption();
co.title = getActivity().getPackageManager()
.getApplicationLabel(
res.activityInfo.applicationInfo);
co.icon = getActivity().getPackageManager()
.getApplicationIcon(
res.activityInfo.applicationInfo);
co.appIntent = new Intent(intent);
co.appIntent
.setComponent(new ComponentName(
res.activityInfo.packageName,
res.activityInfo.name));
cropOptions.add(co);
CropOptionAdapter adapter = new CropOptionAdapter(
getActivity(), cropOptions);
AlertDialog.Builder builder = new AlertDialog.Builder(
getActivity());
builder.setTitle("Choose Crop App");
builder.setAdapter(adapter,
new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int item)
startActivityForResult(
cropOptions.get(item).appIntent,
CROP_FROM_CAMERA);
);
builder.setOnCancelListener(new DialogInterface.OnCancelListener()
@Override
public void onCancel(DialogInterface dialog)
if (mImageCaptureUri != null)
getActivity().getContentResolver().delete(
mImageCaptureUri, null, null);
mImageCaptureUri = null;
);
AlertDialog alert = builder.create();
alert.show();
public String encodeTobase64(Bitmap image)
Bitmap immagex = image;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
immagex.compress(Bitmap.CompressFormat.JPEG, 100, baos);
image_Array = baos.toByteArray();
String imageEncoded = Base64
.encodeToString(image_Array, Base64.DEFAULT);
return imageEncoded;
`
在复制这个问题之前在下面评论，因为我被检查了很多但没有找到任何解决方案，如果您需要更多信息，请告诉我。
【问题讨论】：
我通过删除 intent.putExtra("circleCrop", new String("")); 清除了问题 3；从代码 【参考方案1】：我正在使用此代码，它适用于所有版本的 android
注意：您可以省略selectImage函数中的自定义对话框代码或为其创建自定义对话框
在 build graddle 文件中添加以下内容 compile 'com.theartofdev.edmodo:android-image-cropper:2.1.+'
private File photoFile = null;
public void selectImage()
final Dialog dialog = new Dialog(this, R.style.CustomDialog);
dialog.setContentView(R.layout.custom_dialog);
dialog.setCancelable(true);
dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
final TextView camrea= (TextView) dialog.findViewById(R.id.text);
final TextView lib= (TextView) dialog.findViewById(R.id.text1);
final TextView cancel= (TextView) dialog.findViewById(R.id.text2);
camrea.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
dispatchTakePictureIntent() ;
dialog.cancel();
);
lib.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (Build.VERSION.SDK_INT < 19)
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), 200);
else
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
startActivityForResult(intent, 300);
dialog.cancel();
);
cancel.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
dialog.cancel();
);
dialog.show();
private void dispatchTakePictureIntent()
MarshMallowPermission marshMallowPermission = new MarshMallowPermission(this);
if (!marshMallowPermission.checkPermissionForCamera())
marshMallowPermission.requestPermissionForCamera();
else
if (!marshMallowPermission.checkPermissionForExternalStorage())
marshMallowPermission.requestPermissionForExternalStorage();
else
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
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));
//Log.d("Uri","Activity started");
startActivityForResult(takePictureIntent, 100);
private void startCropImage(Uri crop)
CropImage.activity(crop)
.setGuidelines(CropImageView.Guidelines.ON)
.setAutoZoomEnabled(true)
.setShowCropOverlay(true)
.setActivityTitle("Crop Image")
.start(this);
private File createImageFile() throws IOException
@SuppressLint("SimpleDateFormat")
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return File.createTempFile(
imageFileName,/* prefix */
".jpg", /* suffix */
storageDir /* directory */);
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != RESULT_OK)
return;
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
final CropImage.ActivityResult result = CropImage.getActivityResult(data);
Log.d(TAG," : Image-URI :"+result.getUri());
else if (requestCode == 100)
if("com.google.android.apps.docs.storage".equals(Uri.fromFile(photoFile).getAuthority()))
Toast.makeText(RegistrationActivity.this, "File Not On Device", Toast.LENGTH_SHORT).show();
else
startCropImage(Uri.fromFile(photoFile));
else if (requestCode == 200)
mIsImageUploadUri=Uri.parse(getPathFromURI(getApplicationContext(),Uri.parse(data.getData().toString())));
final Uri selectedImage = Uri.parse(getPathFromURI(getApplicationContext(),data.getData()));
//Log.d(TAG,"Uri"+ selectedImage.toString());
if("com.google.android.apps.docs.storage".equals(selectedImage.getAuthority()))
Toast.makeText(RegistrationActivity.this, "File Not On Device", Toast.LENGTH_SHORT).show();
else
startCropImage(data.getData());
else if (requestCode == 300)
final Uri originalUri = data.getData();
final int takeFlags = data.getFlags() & (Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
//noinspection ResourceType
getContentResolver().takePersistableUriPermission(originalUri, takeFlags);
Log.d(TAG,"Uri"+ originalUri.toString());
if("com.google.android.apps.docs.storage".equals(originalUri.getAuthority()))
Toast.makeText(RegistrationActivity.this, "File Not On Device", Toast.LENGTH_SHORT).show();
else
startCropImage(originalUri);
@TargetApi(Build.VERSION_CODES.KITKAT)
public static String getPathFromURI(final Context context, final Uri uri)
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri))
// ExternalStorageProvider
if (isExternalStorageDocument(uri))
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type))
return Environment.getExternalStorageDirectory() + "/" + split[1];
// DownloadsProvider
else if (isDownloadsDocument(uri))
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
// MediaProvider
else if (isMediaDocument(uri))
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type))
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
else if ("video".equals(type))
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
else if ("audio".equals(type))
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
final String selection = "_id=?";
final String[] selectionArgs = new String[]
split[1]
;
return getDataColumn(context, contentUri, selection, selectionArgs);
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme()))
return getDataColumn(context, uri, null, null);
// File
else if ("file".equalsIgnoreCase(uri.getScheme()))
return uri.getPath();
return null;
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs)
Cursor cursor = null;
final String column = "_data";
final String[] projection =
column
;
try
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst())
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
finally
if (cursor != null)
cursor.close();
return null;
public static boolean isExternalStorageDocument(Uri uri)
return "com.android.externalstorage.documents".equals(uri.getAuthority());
public static boolean isDownloadsDocument(Uri uri)
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
public static boolean isMediaDocument(Uri uri)
return "com.android.providers.media.documents".equals(uri.getAuthority());
【讨论】：
在nexus手机上也能用吗，你测试了吗 但是您的代码没有裁剪选项对吗？如果可能的话，你可以分享 git 链接，以便我可以检查整个代码 没有createImageFile();该代码中的方法你也可以更新 让我们continue this discussion in chat。 我怎样才能将那个 jar 文件用于 eclip。我尝试了 jar 文件，但没有找到任何方法【参考方案2】：上周我遇到了同样的问题，我终于解决了，这有点不同，我从服务器获取 Base64 中的图像然后裁剪它
这是代码
byte[] decodedString = Base64.decode(imageJson, Base64.DEFAULT);
Bitmap tmp = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
bitmapDecoded = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int h = metrics.heightPixels;
int w = metrics.widthPixels;
Bitmap resized = Bitmap.createScaledBitmap(tmp, tmp.getWidth(), (int) (tmp.getHeight()*1.6), true);
imageView.setImageBitmap(canvas.getCircleBitmap(resized, w,h));
imageJson 是 Base64 中的图像它是一个字符串我将它转换为位图，在我获得屏幕大小后，调整大小的位图在这里是为了有一个方形图像，因为我有一个 16/9 图像这可能是对你没用，最后我在 imageView 中显示位图并用画布方法 getCircleBitmap 裁剪它
方法如下
public Bitmap getCircleBitmap(Bitmap bitmap,int width, int height)
final Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(output);
final int color = Color.RED;
final Paint paint = new Paint();
final Rect rect = new Rect((int)(bitmap.getWidth()*0.054), (int) (height*0.005), (int) (bitmap.getWidth()*0.945), (bitmap.getHeight()));
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawOval(rectF, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
bitmap.recycle();
return output;
您可以更改矩形的值以适合您的使用 我在一个扩展 View 的画布类中声明了这个方法，真的希望这对你也有帮助，对不起我的英语
【讨论】：
【参考方案3】：我也面临这个问题..现在它工作正常，因为我正在使用库
**compile 'com.soundcloud.android:android-crop:1.0.1@aar'**
公共 Uri mImageCaptureUri=null;
从图库中选择图片
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, PICK_FROM_FILE);
这是添加到 onActivityResult 方法
//call this line after crop it
if(requestCode == Crop.REQUEST_CROP)
handleCrop(resultCode, data);
case PICK_FROM_FILE:
mImageCaptureUri = data.getData();
beginCrop(mImageCaptureUri);
break;
private void beginCrop(Uri source)
Uri destination = Uri.fromFile(new File(getCacheDir(), "cropped"));
Crop.of(source, destination).asSquare().start(this);
private void handleCrop(int resultCode, Intent result)
if (resultCode == RESULT_OK)
// mImage.setImageURI(Crop.getOutput(result));
Picasso.with(SettingsActivity.this).load(Crop.getOutput(result)).transform(new RoundTransform()).into(mImage);
mImageCaptureUri=Crop.getOutput(result);
getImageUri(mImageCaptureUri); //this method uri stored to sdcard
else if (resultCode == Crop.RESULT_ERROR)
Toast.makeText(this, Crop.getError(result).getMessage(), Toast.LENGTH_SHORT).show();
【讨论】：
【参考方案4】：如果用户要求拍照：
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(BaseActivity.this.getPackageManager()) != null)
File photoFile = null;
try
photoFile = ImageVideoUtil.createImageFile();
catch (IOException ex)
ex.printStackTrace();
if (photoFile != null)
imagePath = Uri.fromFile(photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imagePath);
startActivityForResult(takePictureIntent, ApplicationConstants.REQUEST_CAMERA);
如果用户要求从相机中选择，您可以使用：
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, ApplicationConstants.REQUEST_GALLERY);
dialog.dismiss();
在您的活动结果中，您可以获取 uri 并使用它：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
BaseFragment fragment = (BaseFragment) getSupportFragmentManager().findFragmentById(R.id.fl_main);
if (resultCode == RESULT_OK)
Bitmap bitmap = null;
switch (requestCode)
case ApplicationConstants.REQUEST_CAMERA:
if (imagePath != null && fragment instanceof PhotoView)
bitmap = Tools.fromGallery(this, imagePath);
if (bitmap != null)
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth() / 2, bitmap.getHeight() / 2);
((PhotoView) fragment).onPhotoSet(bitmap);
break;
case ApplicationConstants.REQUEST_GALLERY:
Uri uri = data.getData();
imagePath = uri;
bitmap = Tools.fromGallery(this, uri);
if (bitmap != null && fragment instanceof PhotoView)
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth() / 2, bitmap.getHeight() / 2);
((PhotoView) fragment).onPhotoSet(bitmap);
break;
case ApplicationConstants.REQUEST_VIDEO:
if (fragment instanceof VideoView)
((VideoView) fragment).onVideoSelected(videoPath);
break;
这里是 ImageVideoUtil 类，它可以帮助您裁剪、缩放、保存和读取图像视频操作。
public class ImageVideoUtil
public static void startCameraIntent(Activity activity)
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(activity.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
ex.printStackTrace();
// Continue only if the File was successfully created
if (photoFile != null)
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
activity.startActivityForResult(takePictureIntent, ApplicationConstants.REQUEST_CAMERA);
public static File createImageFile() throws IOException
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "SnapSense" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(imageFileName, /* prefix */
ApplicationConstants.DEFAULT_IMGAE_SUFFIX, /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
return image;
public static File createVideoFile() throws IOException
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "SnapSense" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
File video = File.createTempFile(imageFileName, /* prefix */
ApplicationConstants.DEFAULT_VIDEO_SUFFIX, /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
return video;
public static Bitmap decodeBitmap(Bitmap bmp)
try
ByteArrayOutputStream out = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 50, out);
return BitmapFactory.decodeStream(new ByteArrayInputStream(out.toByteArray()));
catch (Exception ex)
ex.printStackTrace();
return bmp;
最后还有一些其他的静态方法可以帮助你：
public static Bitmap fromGallery(Context context, final Uri selectedImageUri)
try
Bitmap bm = MediaStore.Images.Media.getBitmap(context.getContentResolver(), selectedImageUri);
ExifInterface exif = new ExifInterface(selectedImageUri.getPath());
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
int angle = 0;
switch (orientation)
case ExifInterface.ORIENTATION_ROTATE_90:
angle = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
angle = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
angle = 270;
break;
default:
angle = 0;
break;
Matrix mat = new Matrix();
if (angle == 0 && bm.getWidth() > bm.getHeight())
mat.postRotate(90);
else
mat.postRotate(angle);
return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), mat, true);
catch (IOException e)
e.printStackTrace();
catch (OutOfMemoryError oom)
oom.printStackTrace();
return null;
public static String getRealPathFromURI(Activity activity, Uri contentUri)
String[] proj = MediaStore.Images.Media.DATA;
Cursor cursor = activity.managedQuery(contentUri, proj, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
希望我的代码对您有所帮助。祝你好运。
【讨论】：
【参考方案5】：我在 Nexus 中遇到了同样的问题。我使用了Android Image Cropper，它非常轻巧灵活。
编译'com.theartofdev.edmodo:android-image-cropper:2.2.+'
【讨论】：
【参考方案6】：每个版本都有自己的路径获取方式： 试试这个方法将适用于每个版本，它为我工作：
public static String getRealPathFromURI(final Context context, final Uri uri)
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri))
// ExternalStorageProvider
if (isExternalStorageDocument(uri))
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type))
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
// TODO handle non-primary volumes
// DownloadsProvider
else if (isDownloadsDocument(uri))
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
// MediaProvider
else if (isMediaDocument(uri))
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type))
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
else if ("video".equals(type))
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
else if ("audio".equals(type))
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
final String selection = "_id=?";
final String[] selectionArgs = new String[]split[1];
return getDataColumn(context, contentUri, selection,
selectionArgs);
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme()))
return getDataColumn(context, uri, null, null);
// File
else if ("file".equalsIgnoreCase(uri.getScheme()))
return uri.getPath();
return null;
【讨论】：
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