61

我正在尝试从 Google+ 同步照片的其中一个文件夹中的图库应用程序中获取图像。选择图像后,Uri 正在正确传回。但是当我尝试在存储设备上获取该图像的实际路径以便我可以使用它时,它会崩溃。问题似乎与picasa 内容提供商有关。

在 Nexus S 和 Nexus 7 以及其他设备上进行了测试。

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 字段似乎正确地传递了 Uri,但是当我尝试获取图像的位置时,它会因以下错误而崩溃。

W/GalleryProvider(14381):不支持的列:_data

似乎 Picasa 相册的内容提供程序没有 _data 字段。

获取位置的代码是:

// imageUri 是上面的 Uri。
String[] proj = { MediaStore.Images.Media.DATA };
光标 cursor = context.getContentResolver().query(imageUri, proj,null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();

字符串文件路径 = cursor.getString(column_index);
光标.close();

此图像似乎支持的唯一列是:[user_account, picasa_id, _display_name, _size, mime_type, datetaken, latitude, longitude,orientation]

我们如何获得这张图片的实际位置。如果我们不应该使用这个图像,那么这些图像首先不应该显示给用户。

启动图库应用的意图是:

意图意图 = new Intent();
intent.setType("图片/*");
意图.setAction(意图.ACTION_GET_CONTENT);
4

7 回答 7

17

我现在浪费了很多时间,现在我找到了一个在所有情况下都有效的解决方案,而无需在特殊线程或其他东西中进行任何魔术下载。以下方法从用户选择的内容中返回一个流,这适用于野外的所有内容。

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;
}
于 2014-01-13T19:34:34.863 回答
7

经过大量研究,我觉得有太多变通方法来做一些似乎很简单的事情。因此,我继续编写了一个小型库,它可以处理所有复杂的 if else,并且恰好适用于我能想到的所有可能的场景。试一试,看看这是否有帮助。

http://techdroid.kbeanie.com/2013/03/easy-image-chooser-library-for-android.html

这是一个初步的实现。尽管它几乎可以处理所有情况,但可能存在一些错误。如果您使用此库,请告诉我您的反馈,如果可以进一步改进。

于 2013-03-30T18:45:40.207 回答
5

大约一年前我遇到了同样的问题。我向您展示了我的解决方案(代码很混乱,请重构它)。所以,你有从画廊返回的图像 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;                      
}

现在我们需要函数来下载图像:

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路径及其方向。

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;           
    }
}
于 2012-12-30T17:17:47.650 回答
2

根据@drindt 的回答,下面的代码给出File了从 Google Photo cloud-synced-but-not-in-device 文件下载的临时路径。

@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;
}
于 2016-06-12T03:50:34.030 回答
1

下面的技巧对我有用,我在这里做的是如果 URI 中有任何授权 url,那么我将使用下面的代码创建一个临时图像并返回相同的内容 URI。

在这里也回答了类似的问题。。

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);
}
于 2015-09-30T17:17:57.727 回答
0

我使用了这种方法,对我来说效果很好,希望这对你有帮助....

ACTIVITYRESULT_CHOOSEPICTURE 是调用 startActivity(intent, requestCode) 时使用的 int;

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();
  }
}

如果上面的代码不起作用,而不仅仅是参考这个链接......它会很好地展示方式

http://dimitar.me/how-to-get-picasa-images-using-the-image-picker-on-android-devices-running-any-os-version/

于 2014-05-14T10:47:22.810 回答
0

最后以经典解决方案结束...通过使用涵盖所有权限的 Document.util:-1-在您的 onActivityResult() 内部:-

case GALLERY_CAPTURE_IMAGE_REQUEST_CODE:
                    String filePath = DocumentUtils.getPath(MainContainerActivity.this,data.getData();

                    break;

2- 创建类 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-您还需要 ImageLoader.java 中的以下功能:-

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);
}
于 2015-05-26T08:41:08.103 回答