Question

我使用以下代码从数据库中获取记录。

 for (LocWiseProfileBeans cn : LocWiseProfile) {
        // get a reference for the TableLayout
        TableLayout table = (TableLayout) findViewById(R.id.locprofile_table);

        // create a new TableRow
        TableRow row = new TableRow(this);

        // count the counter up by one
        counter++;


        String log = "Loc Name: "+cn.getLocname()+" ,Lattitude: " + cn.getLattitude()+ " ,Longitude: " + cn.getLongitude()+ " , Selected Profile :"+cn.getSelectedprofile();
        TextView t = new TextView(this);
        // set the text to "text xx"
        t.setText(cn.getLocname());

        TextView t2 = new TextView(this);
        t2.setText(cn.getSelectedprofile());
        row.addView(t);
        row.addView(t2);
        table.addView(row,new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

但我需要启用此记录以便在用户请求时删除表示如果用户点击第二条记录，则该记录将被删除我试着找到答案，但找不到合适的答案.......
请提供参考代码或文章提前谢谢！

Answer 1

您可以通过将onClickListener设置为您的行来执行此操作。要确定单击哪一行，您可以为该行设置唯一标记。

row.setTag(counter);  //  use counter or index for tag, so you can get the data from LocWiseProfile later
row.setOnClickListener(new OnClickListener()  {
    @Override
    public void onClick(View v)  {
        int tag = (Integer)view.getTag();
        LocWiseProfileBeans cn = LocWiseProfile.get(tag);
        //  Perform delete action here
        //  ...
    }   
});

如果您只想将db的结果显示为列表，我建议您使用ListActivity或ListView，使用适配器可以更简单的方式显示和管理数据。

Answer 2

    //decleration 
EventDataSQLHelper eventsData; //Class where table is created
SQLiteDatabase dbx,rdbx;

//onCreate
eventsData = new EventDataSQLHelper(this);
rdbx= eventsData.getReadableDatabase();
        dbx=eventsData.getWritableDatabase();
btn1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
//specify the id of the record to be deleted
            dbx.delete("tablename", "id=" ?, null); 
            }
        });

如何在sqlite中检索后启用删除记录？

2 个答案: