Question

好的，所以我有一个光标适配器，我从各种来源拼凑而成，大多数似乎工作 - 除了我的名字字段。列表视图中有两个复选框，每个名称，但我的名字都是相同的（名字）

有人发现我创造的问题吗？感谢您的帮助。

public class MyDataAdapter extends SimpleCursorAdapter {
private Cursor c;
private Context context;
private ArrayList<String> list = new ArrayList<String>();
private ArrayList<Boolean> itemCheckedHere = new ArrayList<Boolean>();
private ArrayList<Boolean> itemCheckedLate = new ArrayList<Boolean>();
private ArrayList<Integer> itemCheckedIdx = new ArrayList<Integer>();
int idxCol;
int idx;

// itemChecked will store the position of the checked items.

public MyDataAdapter(Context context, int layout, Cursor c, String[] from,
        int[] to) {
    super(context, layout, c, from, to);
    this.c = c;
    this.context = context;
    c.moveToFirst();
    for (int i = 0; i < c.getCount(); i++) {
        itemCheckedHere.add(i, false); // initializes all items value with false
        itemCheckedLate.add(i, false); // initializes all items value with false
    }
}

public View getView(final int pos, View inView, ViewGroup parent) {
    TextView studentName;
    ImageView studentPhoto;

    if (inView == null) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inView = inflater.inflate(R.layout.show_attendance, null);
    }

    final CheckBox cBoxH = (CheckBox) inView.findViewById(R.id.attend);
    final CheckBox cBoxL = (CheckBox) inView.findViewById(R.id.late);

    // set up name field

    studentName = (TextView) inView.findViewById(R.id.stuname);   
    if (studentName != null)
    {
            int index = c.getColumnIndex(gradeBookDbAdapter.KEY_NAME);
            String name = c.getString(index);
            studentName.setText(name);
    } 




    cBoxH.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {

            CheckBox cb = (CheckBox) v.findViewById(R.id.attend);

            if (cb.isChecked()) {
                itemCheckedHere.set(pos, true);
                // do some operations here
            } else if (!cb.isChecked()) {
                itemCheckedHere.set(pos, false);
                // do some operations here
            }
        }
    });
    cBoxL.setOnClickListener(new OnClickListener() {

       public void onClick(View v) {
            CheckBox cb = (CheckBox) v.findViewById(R.id.late);

            if (cb.isChecked()) {
               itemCheckedLate.set(pos, true);
               // do some operations here
            } else if (!cb.isChecked()) {
               itemCheckedLate.set(pos, false);
               // do some operations here
            }
        }
    });
    cBoxH.setChecked(itemCheckedHere.get(pos)); // this will Check or Uncheck the
    cBoxL.setChecked(itemCheckedLate.get(pos)); // this will Check or Uncheck the
    // CheckBox in ListView
    // according to their original
    // position and CheckBox never
    // loss his State when you
    // Scroll the List Items.
    return inView;
}

Answer 1

适配器中的光标未设置为正确的行。

首先，您应该为光标和上下文删除自己的成员变量！然后尝试实现CursorAdapter的bindView方法，它将提供已设置为当前行的游标：

public class MyDataAdapter extends SimpleCursorAdapter {
private ArrayList<String> list = new ArrayList<String>();
private ArrayList<Boolean> itemCheckedHere = new ArrayList<Boolean>();
private ArrayList<Boolean> itemCheckedLate = new ArrayList<Boolean>();
private ArrayList<Integer> itemCheckedIdx = new ArrayList<Integer>();


// itemChecked will store the position of the checked items.

public MyDataAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
    super(context, layout, c, from, to);

    for (int i = 0; i < c.getCount(); i++) {
        itemCheckedHere.add(i, false); // initializes all items value with false
        itemCheckedLate.add(i, false); // initializes all items value with false
    }
}

public void bindView (View inView, Context context, Cursor cursor){
    super.bindView(inView,context,cursor);

    TextView studentName;
    ImageView studentPhoto;

    //inView is never null in bindView

    final CheckBox cBoxH = (CheckBox) inView.findViewById(R.id.attend);
    final CheckBox cBoxL = (CheckBox) inView.findViewById(R.id.late);

    // set up name field

    studentName = (TextView) inView.findViewById(R.id.stuname);   
    if (studentName != null)
    {
            int index = cursor.getColumnIndex(gradeBookDbAdapter.KEY_NAME);
            String name = cursor.getString(index);
            studentName.setText(name);
    } 

    //your other code
}

//other methods

}

Answer 2

你要踢自己。您只是忘了将光标移动到与ListView中的索引相对应的位置：

c.moveToPosition(pos)

我对TextViews做了什么？

2 个答案: