Question

所以我终于让我的listview从我的db查询中显示结果，但由于某种原因它只显示1，最后一个。

public class PastGames extends ListActivity {

@Override

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.pastgames);



    DBAdapter db = new DBAdapter(this);

    db.open();
    Cursor c = db.getAllFinalscores();
    if (c.moveToFirst())
    {
        do {
            String[] listData = new String [] {"Date: " + c.getString(1) + "\n" +
                    "Strokes: " + c.getString(2) + "\n" + "Holes: " + c.getString(3)};
            this.setListAdapter(new ArrayAdapter<String>(this,
                    R.layout.pastgames, listData));
        }
        while (c.moveToNext());
    }
    db.close();


}
}

将对DBAdapter

//***RETRIEVES ALL THE FINALSCORES***//
public Cursor getAllFinalscores()
{
    return db.query(DATABASE_TABLE, new String[] {
            KEY_ROWID,
            KEY_DATE,
            KEY_FINALSCORE,
            KEY_HOLESPLAYED},
            null, null, null, null, null);
}

有人能让我知道我做错了什么吗？为什么不显示db中的每一行？

编辑：这是我的xml文件

<?xml version="1.0" encoding="utf-8"?>
<TextView 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@id/android:list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="16sp"
    android:padding="10dp"/>

新（正确方式）：

public class PastGames extends ListActivity {

@Override

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.pastgames);


    db.open();
    Cursor c = db.getAllFinalscores();
    String[] listData = new String[c.getCount()];
    if (c.moveToFirst())
    {
    do {

        listData[c.getPosition()] = "Date: " + c.getString(1) + "\n" +
            "Strokes: " + c.getString(2) + "\n" + "Holes: " + c.getString(3);
    }
        while (c.moveToNext());
        this.setListAdapter(new ArrayAdapter<String>(this,
            R.layout.pastgames, listData));
    }
    db.close()
}

}

Answer 1

对于数组中的每一行，您都在循环中设置ListAdapter。这就是为什么你只显示最后一个......

String[] listData;
do {
     listData[i] = "Date: " + c.getString(1) + "\n" +
                        "Strokes: " + c.getString(2) + "\n" + "Holes: " + c.getString(3);
   }
while (c.moveToNext());
this.setListAdapter(new ArrayAdapter<String>(this,
                        R.layout.pastgames, listData));

在while循环中填充数组。然后只调用你的this.setListAdapter（）一次。这将解决问题

Answer 2

您正在每次循环执行时初始化列表数据

Listview仅显示查询的1个结果

2 个答案: