给系统库添加文件后扫描更新系统图库

 

paintPath = MediaStore.Images.Media.insertImage(context.getContentResolver(),bitmap,str,null);

Uri uri = Uri.parse(paintPath);

/**
 * 通过uri获得文件路径
 * @param context
 * @param uri
 * @return
 */
public static String getFilePathByContentResolver(Context context, Uri uri) {
    if (null == uri) {
        return null;
    }
    Cursor c = context.getContentResolver().query(uri, null, null, null, null);
    String filePath  = null;
    if (null == c) {
        throw new IllegalArgumentException(
                "Query on " + uri + " returns null result.");
    }
    try {
        if ((c.getCount() != 1) || !c.moveToFirst()) {
        } else {
            filePath = c.getString(
                    c.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA));
        }
    } finally {
        c.close();
    }
    return filePath;
}

// Tell the media scanner about the new file so that it is

            // immediately available to the user.

            MediaScannerConnection.scanFile(this,

                    new String[] { file.toString() }, null,

                    new MediaScannerConnection.OnScanCompletedListener() {

                public void onScanCompleted(String path, Uri uri) {

                    Log.i("ExternalStorage", "Scanned " + path + ":");

                    Log.i("ExternalStorage", "-> uri=" + uri);

                }

            });