Question

我使用自定义适配器创建了一个listView，它从数据库中获取数据并将其绑定到列表视图，适配器选择记录数量非常好，但它会一直显示所有条目的最后一条记录，例如，如果从db中检索到5条记录，列表视图将显示五次的最后一条记录。

这是代码

Activities SetAct = new Activities();
final ArrayList<Activities> sData = new ArrayList<Activities>();
try{
    SQLiteDatabase db = openOrCreateDatabase("iTimeDB", MODE_PRIVATE, null);
    Cursor c2 = db.rawQuery("SELECT * FROM Activities", null);   // WHERE ID = '" +ID+"'"
    for (c2.moveToFirst(); !c2.isAfterLast(); c2.moveToNext()) {
        String title =c2.getString(c2.getColumnIndex("Title"));
        String details =c2.getString(c2.getColumnIndex("Details"));
        String time =c2.getString(c2.getColumnIndex("Time"));
        String ref= c2.getString(c2.getColumnIndex("Ref"));
        String matter =c2.getString(c2.getColumnIndex("Matter"));
        String date = c2.getString(c2.getColumnIndex("Date"));
        String ID = c2.getString(c2.getColumnIndex("ID"));
        String IMEI1 =  c2.getString(c2.getColumnIndex("IMEI"));
        SetAct.setTitle(title);
        SetAct.setDetails(details);
        SetAct.setMatter(matter);
        SetAct.setRef(ref);
        SetAct.setTime(time);
        SetAct.setDate(date);
        SetAct.setID(ID);
        sData.add(SetAct);
        }
    c2.close();
    db.close();
    }
    catch(Exception e){
        e.printStackTrace();
        Log.v("YYY", e.toString());
    }
    final ListView listView = (ListView) findViewById(R.id.listView1);
    listView.setAdapter(new CustomListAdapter(this, sData));

Answer 1

从外部循环下面的 循环添加 > 循环

Activities SetAct = new Activities();

实施例

for (c2.moveToFirst(); !c2.isAfterLast(); c2.moveToNext()) {
       Activities SetAct = new Activities();
       String title =c2.getString(c2.getColumnIndex("Title"));
       // Remaining as it is..
}

Answer 2

像这样使用。

我使用以下模式来读取查询结果。

  SQLiteDatabase db = new DbHelper().getWritableDatabase();
    String sql = "SELECT ...";
    String[] args = ...;
    Cursor cs = db.rawQuery(sql, args);
    while (cs.moveToNext()) {
        // cs.getXxx(0), cs.getXxx(1)
    }
    cs.close();
    db.close();

DbHelper是我从SQLiteOpenHelper

扩展的类

ListView重复上次输入

2 个答案: