Uri 转实际路径Path

 public static String getPath(final Context context, final Uri uri) {        // check here to KITKAT or new version        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 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();        }        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 index = cursor.getColumnIndexOrThrow(column);                return cursor.getString(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());    }

public static boolean isGooglePhotosUri(Uri uri) {        return "com.google.android.apps.photos.content".equals(uri                .getAuthority());    }

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