如何刷新使用光标适配器列表视图 [英] how to refresh the listView using the Cursor Adapter

问题描述

我创建了一个的ListView 使用的CursorAdapter 。我现在想更新的ListView 并刷新值到ListView。

I have created a ListView using CursorAdapter . Now I am Trying to update the ListView and Refresh the value to the ListView .

但我无法弄清楚。如何使用装载机工作或 changeCursor（）刷新我的的ListView

But I am not able to figure out . How to work with Loader or changeCursor() to refresh my ListView

下面是设置的我的code中的的CursorAdapter ：

Below is My code of setting the CursorAdapter :

//成功地在这里完成的。

//SucessFully done here

SQLDataSore datastore = new SQLDataSore(PrintContent.this);

Cursor cursor                 = datastore.getJSONData();

final CursorDemo cursorDemo = new CursorDemo(PrintContent.this, cursor);

list_View.setAdapter(cursorDemo);

我的按钮 的onClick 我更新值插入数据库
//成功地完成

My Button onClick I am updating the Value into the Database //SucessFully Done

btn_check.setOnClickListener( new OnClickListener() {

            @Override
            public void onClick(View view ) {

                String editTextValue = edit_check.getText().toString();

                if (editTextValue!=null) {


                    SQLDataSore sqlDataSore = new SQLDataSore(PrintContent.this);

                    Cursor cursor_update = sqlDataSore.updateData(editTextValue);

//Here How Should I update my ListView ...?
                }

            }

我的UpdateData方法：

My UpdateData Method:

public Cursor updateData(String editContent){

        SQLiteDatabase updateContent = getReadableDatabase();


        Cursor cursor_update = updateContent.rawQuery( "update " +TABLE_NAME + " set content = '"+ editContent
                +"' "+" where _id = 357", null);

        return cursor_update;
    }

CursorDemo类

CursorDemo Class

public class CursorDemo extends CursorAdapter{

        public CursorDemo(Context context, Cursor c) {

            super(context, c , false);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void changeCursor(Cursor cursor) {
            // TODO Auto-generated method stub
            super.changeCursor(cursor);
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            // TODO Auto-generated method stub

            TextView txt_content        = (TextView) view.findViewById(R.id.txt_content);
            TextView txt_likes_count    = (TextView) view.findViewById(R.id.txt_likescount);
            TextView txt_name         = (TextView) view.findViewById(R.id.txt_name);
            TextView txt_display_name = (TextView) view.findViewById(R.id.txt_display_name);

            txt_content.setText(cursor.getString(cursor.getColumnIndex("content")));

        }

        @Override
        public View newView(Context context , Cursor cursor, ViewGroup viewGroup) {
            // TODO Auto-generated method stub
            LayoutInflater inflater = LayoutInflater.from(context);
            View view = inflater.inflate(R.layout.message_row_view, viewGroup ,false);

            return view;
        }

    }

任何帮助pciated鸭$ P $ ...
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Any Help is Appreciated... });

推荐答案

如果CursorDemo延伸的CursorAdapter，那么你必须使用 adapter.swapCursor（cursor_update）;

If CursorDemo extends CursorAdapter, then you have to use adapter.swapCursor(cursor_update);

这应该关闭旧光标，并重新加载数据用新的

That should close old cursor, and reload data with the new one

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