改变一个TextView的文本一个ListView内

改变一个TextView的文本一个ListView内

本文介绍了改变一个TextView的文本一个ListView内的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

限时删除!!

我在做一个简单的待办事项列表,我希望能够点击的项目,并进入一个新的文本,然后将取代在该单元格中的TextView的文本。我已经得到了dialogAlert工作,我只是不知道如何抓住细胞的TextView的,并改变它

这是活动的样子,

 公共类MainActivity扩展AppCompatActivity {    私人ListDataSource DS;
    私人的ListView listViewToDo;    @覆盖
    保护无效的onCreate(捆绑savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.activity_main);
        最后上下文的背景下=这;
        Log.d(MainActivity,试图创建数据源);
        尝试{
            DS =新ListDataSource();
        }
        赶上(例外五)
        {
            e.printStackTrace();
            Log.d(MainActivity,无法创建数据源);
        }
        Log.d(主要活动,尝试空单视图查看屏幕上的链接);
        listViewToDo =(ListView控件)findViewById(R.id.listOfLists);
        Log.d(主要活动,查看联系在一起,试图设置适配器的ListView);
        listViewToDo.setAdapter(新ListDataSourceAdapter(这一点,DS));
        Log.d(主要活动,成功设置适配器);        //添加按钮监听器
        listViewToDo.setOnItemClickListener(新AdapterView.OnItemClickListener()
        {
            @覆盖
            公共无效onItemClick(适配器视图<>母公司,观景,最终诠释的地位,长期ID)
            {
                AlertDialog.Builder editItem =新AlertDialog.Builder(背景);
                最终的EditText的EditText =新的EditText(背景);
                editItem.setTitle(更改项目);
                editItem
                        .setMessage(设置新的待办事项)
                        .setView(EditText上)
                        .setCancelable(假)
                        .setPositiveButton(提交,新DialogInterface.OnClickListener()
                        {
                            公共无效的onClick(DialogInterface对话框,INT ID)
                            {
                                //我该怎么放在这里?
                            }
                        })
                        .setNegativeButton(取消,新DialogInterface.OnClickListener()
                        {
                            公共无效的onClick(DialogInterface对话框,INT ID)
                            {
                                dialog.cancel();
                            }
                        });
                AlertDialog alertDialog = editItem.create();
                alertDialog.show();
            }
        });
    }
}


解决方案

  ds.remove(位置);
ds.add(位置,edittext.getText()。的toString()。修剪())
ListDataSourceAdapter适配器=新ListDataSourceAdapter(这一点,DS)
listViewToDo.setAdapter(适配器);
adapter.notifDataSetChanged();

I'm making a simple to do list and I want to be able to click on the item and enter a new text which will then replace the text of the TextView in that cell. I've got the dialogAlert working, I just don't know how to grab the cell's TextView and change it

This is what the Activity looks like,

public class MainActivity extends AppCompatActivity {

    private ListDataSource ds;
    private ListView listViewToDo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final Context context = this;
        Log.d("MainActivity","Attempting to create data source");
        try {
            ds = new ListDataSource();
        }
        catch(Exception e)
        {
            e.printStackTrace();
            Log.d("MainActivity","Failed to create data source");
        }
        Log.d("Main Activity","Attempting to link empty list view to on screen view");
        listViewToDo = (ListView)findViewById(R.id.listOfLists);
        Log.d("Main Activity","Views linked, Attempting to set adapter to listView");
        listViewToDo.setAdapter(new ListDataSourceAdapter(this, ds));
        Log.d("Main Activity", "Successfully set Adapter");

        // add button listener
        listViewToDo.setOnItemClickListener(new AdapterView.OnItemClickListener()
        {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, final int position, long id)
            {
                AlertDialog.Builder editItem = new AlertDialog.Builder(context);
                final EditText edittext = new EditText(context);
                editItem.setTitle("Change Item");
                editItem
                        .setMessage("Set new todo item")
                        .setView(edittext)
                        .setCancelable(false)
                        .setPositiveButton("Submit", new DialogInterface.OnClickListener()
                        {
                            public void onClick(DialogInterface dialog, int id)
                            {
                                //what do I put here?
                            }
                        })
                        .setNegativeButton("Cancel", new DialogInterface.OnClickListener()
                        {
                            public void onClick(DialogInterface dialog, int id)
                            {
                                dialog.cancel();
                            }
                        });
                AlertDialog alertDialog = editItem.create();
                alertDialog.show();
            }
        });
    }
}
解决方案
ds.remove(position);
ds.add(position,edittext.getText().toString().trim())
ListDataSourceAdapter adapter = new ListDataSourceAdapter(this, ds)
listViewToDo.setAdapter(adapter );
adapter.notifDataSetChanged();

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1403页,肝出来的..

09-06 19:12