解决4.4版本以上剪裁图片时提示无法加载图片的问题

 /**
     * 将uri转换成字符串
     * 解决4.4版本以上获取到的uri是图片名称而非图片路径，导致剪裁图片时提示无法加载图片的问题
     * 详细的解决方案，请参考这篇文章
     * 当安卓的版本比较高时（如4.4），选择本地相册可能会返回“无法加载此图片”
     * 原因：正常uri是file：//...而高版本是content：//...
     * 所以需要一个转换操作
     *
     * @param context
     * @param uri
     * @return
     */
    @SuppressLint("NewApi")
    public static String getPath(final Context context, final Uri uri) {
//        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        final boolean isKitKat = Build.VERSION.SDK_INT >= 19;
        try {
            ReflectionUtil reflectionUtil = new ReflectionUtil();
            Object documentUri = reflectionUtil.invokeStaticMethod("android.provider.DocumentsContract", "isDocumentUri", new Object[]{context, uri});
            Object documentId = reflectionUtil.invokeStaticMethod("android.provider.DocumentsContract", "getDocumentId", new Object[]{uri});
            // DocumentProvider
//            if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            if (isKitKat && Boolean.valueOf(documentUri.toString()) == true) {
                // ExternalStorageProvider
                if (isExternalStorageDocument(uri)) {
//                    final String docId = DocumentsContract.getDocumentId(uri);
                    final String docId = documentId.toString();
                    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 String id = documentId.toString();
                    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 docId = documentId.toString();
                    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
                if (isGooglePhotosUri(uri))
                    return uri.getLastPathSegment();
                return getDataColumn(context, uri, null, null);
            }
            // File
            else if ("file".equalsIgnoreCase(uri.getScheme())) {
                return uri.getPath();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        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 index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        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) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }