从Picasa // Google +同步文件夹中获取图片库中的图片不起作用
我正在尝试从Google+已同步的照片中的一个文件夹中获取图库应用中的图片。 select图像后，Uri被正确传回。 但是，当我尝试在存储设备上获取该映像的实际path时，我可以使用它，它会崩溃。 这个问题似乎是与picasa内容提供商专门有关的。
testingNexus S和Nexus 7以及其他设备。
E / AndroidRuntime（14572）：java.lang.RuntimeException：传递结果失败ResultInfo {who = null，request = 1，result = -1，data = Intent {dat = content：//com.google.android.gallery3d.provider / picasa / item / 5427003652908228690}}
在这里，dat字段似乎正确地通过了Uri，但是当我尝试获取图像的位置时，它会崩溃，并出现以下错误。
W / GalleryProvider（14381）：不支持的列：_data
似乎Picasa相册的内容提供商没有_data字段。
获取位置的代码是：
// imageUri是上面的Uri。
String [] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = context.getContentResolver（）。query（imageUri，proj，null，null，null）;
int column_index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
String filePath = cursor.getString（column_index）;
cursor.close（）;
该图像似乎只支持以下列：[user_account，picasa_id，_display_name，_size，mime_type，datetaken，纬度，经度，方向]
我们如何得到这个图像的实际位置。 如果我们不应该使用这个图像， 这些图像不应该首先显示给用户。
意图推出画廊应用程序是：
Intent intent = new Intent（）; intent.setType（ “图像/ *”）; intent.setAction（Intent.ACTION_GET_CONTENT）;
我现在浪费了大量的时间，现在我发现了一个解决scheme，可以在任何情况下工作，没有任何魔术下载特殊线程或东西。 以下方法从用户select的内容中返回一个stream，并且可以处理所有内容。
FileInputStream getSourceStream(Uri u) throws FileNotFoundException { FileInputStream out = null; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { ParcelFileDescriptor parcelFileDescriptor = mContext.getContentResolver().openFileDescriptor(u, "r"); FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor(); out = new FileInputStream(fileDescriptor); } else { out = (FileInputStream) mContext.getContentResolver().openInputStream(u); } return out; } 经过大量的研究，我觉得有太多的解决方法去做一些看起来很简单的事情。 所以，我继续写了一个小型的图书馆，处理所有复杂的，如果elses和碰巧适用于我能想到的所有可能的场景。 请尝试一下，看看这是否有帮助。
http://techdroid.kbeanie.com/2013/03/easy-image-chooser-library-for-android.html
这是一个初步的实施。 虽然它几乎可以处理所有的情况，但可能会有一些错误。 如果你使用这个库，请让我知道你的反馈，如果有的话可以进一步改进。
我在一年前面临同样的问题..我告诉你我的解决scheme（代码是相当混乱，请重构它）。 所以，你有从图库返回的图像的URI：
ImageInfo getImage(URI imageUri) { ImageInfo result = null; final String[] cursorColumns = {MediaStore.Images.Media.DATA, MediaStore.Images.Media.ORIENTATION}; // some devices (OS versions return an URI of com.android instead of com.google.android if (imageUri.toString().startsWith("content://com.android.gallery3d.provider")) { // use the com.google provider, not the com.android provider. imageUri = Uri.parse(imageUri.toString().replace("com.android.gallery3d","com.google.android.gallery3d")); } Cursor cursor = App.getContext().getContentResolver().query(imageUri, cursorColumns, null, null, null); if (cursor != null) { int dataColumnIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); int orientationColumnIndex = cursor.getColumnIndex(MediaStore.Images.ImageColumns.ORIENTATION); cursor.moveToFirst(); // if it is a picasa image on newer devices with OS 3.0 and up if (imageUri.toString().startsWith("content://com.google.android.gallery3d")) { result = new ImageInfo(downloadImage(imageUri), "0"); } else { // it is a regular local image file result = new ImageInfo(cursor.getString(dataColumnIndex), cursor.getString(orientationColumnIndex)); } cursor.close(); } else { result = new ImageInfo(downloadImage(imageUri), "0"); } return result; }
而现在我们需要function来下载图片：
private String downloadImage(URI imageUri) { File cacheDir; // if the device has an SD card if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) { cacheDir = new File(android.os.Environment.getExternalStorageDirectory(),".OCFL311"); } else { // it does not have an SD card cacheDir = App.getContext().getCacheDir(); } if(!cacheDir.exists()) cacheDir.mkdirs(); File f = new File(cacheDir, PUT_HERE_FILE_NAME_TO_STORE_IMAGE); try { InputStream is = null; if (imageUri.toString().startsWith("content://com.google.android.gallery3d")) { is = App.getContext().getContentResolver().openInputStream(imageUri); } else { is = new URL(imageUri.toString()).openStream(); } OutputStream os = new FileOutputStream(f); Utils.InputToOutputStream(is, os); return f.getAbsolutePath(); } catch (Exception ex) { Log.d(this.getClass().getName(), "Exception: " + ex.getMessage()); // something went wrong ex.printStackTrace(); return null; } }
ImageInfo是我的类来存储图像的path和方向。
public static class ImageInfo { public final String filePath; public final String imageOrientation; public ImageInfo(String filePath, String imageOrientation) { this.filePath = filePath; if (imageOrientation == null) imageOrientation = "0"; this.imageOrientation = imageOrientation; } }
基于@drindt的答案，下面的代码给出了从谷歌照片云同步，但不是在设备文件下载的临时Filepath。
@SuppressLint("NewApi") public static String getFilePath(final Context context, final Uri uri) { // Google photo uri example // content://com.google.android.apps.photos.contentprovider/0/1/mediakey%3A%2FAF1QipMObgoK_wDY66gu0QkMAi/ORIGINAL/NONE/114919 if ("content".equalsIgnoreCase(uri.getScheme())) { String result = getDataColumn(context, uri, null, null); // if (TextUtils.isEmpty(result)) if (uri.getAuthority().contains("com.google.android")) { try { File localFile = createImageFile(context, null); FileInputStream remoteFile = getSourceStream(context, uri); if(copyToFile(remoteFile, localFile)) result = localFile.getAbsolutePath(); remoteFile.close(); } catch (IOException e) { e.printStackTrace(); } } return result; } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } /** * Get the value of the data column for this Uri. This is useful for * MediaStore Uris, and other file-based ContentProviders. * * @param context The context. * @param uri The Uri to query. * @param selection (Optional) Filter used in the query. * @param selectionArgs (Optional) Selection arguments used in the query. * @return The value of the _data column, which is typically a file path. */ 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; } /** * Copy data from a source stream to destFile. * Return true if succeed, return false if failed. */ private static boolean copyToFile(InputStream inputStream, File destFile) { if (inputStream == null || destFile == null) return false; try { OutputStream out = new FileOutputStream(destFile); try { byte[] buffer = new byte[4096]; int bytesRead; while ((bytesRead = inputStream.read(buffer)) >= 0) { out.write(buffer, 0, bytesRead); } } finally { out.close(); } return true; } catch (IOException e) { return false; } } public static String getTimestamp() { try { return new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.ROOT).format(new Date()); } catch (RuntimeException e) { return new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date()); } } public static File createImageFile(Context context, String imageFileName) throws IOException { if (TextUtils.isEmpty(imageFileName)) imageFileName = getTimestamp(); // make random filename if you want. final File root; imageFileName = imageFileName; root = context.getExternalCacheDir(); if (root != null && !root.exists()) root.mkdirs(); return new File(root, imageFileName); } public static FileInputStream getSourceStream(Context context, Uri u) throws FileNotFoundException { FileInputStream out = null; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { ParcelFileDescriptor parcelFileDescriptor = context.getContentResolver().openFileDescriptor(u, "r"); FileDescriptor fileDescriptor = null; if (parcelFileDescriptor != null) { fileDescriptor = parcelFileDescriptor.getFileDescriptor(); out = new FileInputStream(fileDescriptor); } } else { out = (FileInputStream) context.getContentResolver().openInputStream(u); } return out; }
下面的技巧为我工作，我在这里做的是如果有URI中的任何权威URL，那么我使用下面的代码创build一个临时图像并返回相同的内容URI。
我也在这里回答了类似的问题。
public static String getImageUrlWithAuthority(Context context, Uri uri) { InputStream is = null; if (uri.getAuthority() != null) { try { is = context.getContentResolver().openInputStream(uri); Bitmap bmp = BitmapFactory.decodeStream(is); return writeToTempImageAndGetPathUri(context, bmp).toString(); } catch (FileNotFoundException e) { e.printStackTrace(); }finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } } return null; } public static Uri writeToTempImageAndGetPathUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); return Uri.parse(path); }
我用这种方法，对我来说工作得很好，希望这会帮助你….
ACTIVITYRESULT_CHOOSEPICTURE是您在调用startActivity（intent，requestCode）时使用的整数;
public void onActivityResult(int requestCode, int resultCode, Intent data) { if(requestCode == ACTIVITYRESULT_CHOOSEPICTURE) { BitmapFactory.Options options = new BitmapFactory.Options(); final InputStream ist = ontext.getContentResolver().openInputStream(intent.getData()); final Bitmap bitmap = BitmapFactory.decodeStream(ist, null, options); ist.close(); } }
如果上面的代码不工作，只是引用这个链接…它会显露出道路
最后以一个经典的解决scheme结束…通过使用Document.util，它涵盖了所有权限：-1 – 在您的onActivityResult（）： –
case GALLERY_CAPTURE_IMAGE_REQUEST_CODE: String filePath = DocumentUtils.getPath(MainContainerActivity.this,data.getData(); break;
2-创build类DocumentUtils： –
public class DocumentUtils { @TargetApi(Build.VERSION_CODES.KITKAT) public static String getPath(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 the remote address String url; if (isGooglePhotosUri(uri)) { url = getDataColumnWithAuthority(context, uri, null, null); return getDataColumn(context, Uri.parse(url), null, null); } return getDataColumn(context, uri, null, null); } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } /** * Get the value of the data column for this Uri. This is useful for * MediaStore Uris, and other file-based ContentProviders. * * @param context The context. * @param uri The Uri to query. * @param selection (Optional) Filter used in the query. * @param selectionArgs (Optional) Selection arguments used in the query. * @return The value of the _data column, which is typically a file path. */ 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; } /** * Function for fixing synced folder image picking bug * * **/ public static String getDataColumnWithAuthority(Context context, Uri uri, String selection, String[] selectionArgs) { Bitmap bitmap = null; InputStream is = null; if (uri.getAuthority()!=null){ try { is = context.getContentResolver().openInputStream(uri); } catch (FileNotFoundException e) { e.printStackTrace(); } Bitmap bmp = BitmapFactory.decodeStream(is); return ImageLoader.getImageUri(context,bmp).toString(); } return null; } /** * @param uri The Uri to check. * @return Whether the Uri authority is ExternalStorageProvider. */ public static boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is DownloadsProvider. */ public static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is MediaProvider. */ public static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is Google Photos. */ public static boolean isGooglePhotosUri(Uri uri) { if(uri.getAuthority()!=null) return true; return false; }
}
3-您也需要在ImageLoader.java中使用以下function：
public static Uri getImageUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); return Uri.parse(path); }
