如何使用Arraylist访问Sqlite Adapter类到MainActivity？

Question

我正在创建示例图库应用，我正在尝试将图库项目存储在本地sqlite数据库中

Adapter.class的方法：

    public List<String> getImagePath()
{
    ArrayList<String> paths = new ArrayList<String>();
    String selectQuery = "SELECT * FROM " + Databaseconnect.TABLE_FILE;
    SQLiteDatabase db = dbHelper.getWritableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    // looping through all rows and adding to list
    if (cursor.moveToFirst())
    {
        do {

            paths.add(cursor.getString(3).toString());
 //                Log.d("getPathImage:", cursor.getString(0).toString());
        } while (cursor.moveToNext());
    }

    return paths;
}

比

    MuAdapter= new muadapter(Activityname.this);
    mudapter.open();
    ArrayList<String> list =getImagePath();

但是我的错误

    ArrayList<String> list =getImagePath();

如何初始化此方法？请给我一个解决方案。

Answer 1

img.desaturate{
    -webkit-filter: grayscale(100%);
    filter: gray;
    filter: grayscale(100%);
    filter: url(desaturate.svg#greyscale);
}