Android刷新本地图片

public boolean saveImgToGallery(String filePath){
    boolean sdCardExist= Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
    if(!sdCardExist){
        return false;
    }
    try{
        ContentValues contentValues=new ContentValues();
        contentValues.put("mime_type","image/jpg");
        contentValues.put("_data",filePath);
        ContentResolver contentResolver=this.getContentResolver();
        contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,contentValues);
    }catch (Exception e){
        e.printStackTrace();
    }
    return true;
}