使用游标适配器在ListView中显示TextViews和RatingBar

Question

我试图创建一个类，扩展CursorAdapter，以便在ListView中显示RatingBar和文本，使用它的newView和bindView方法。这是对Dev网站上的记事本教程的进一步尝试。我的问题是，程序崩溃主要是因为我实现了错误的方法，尽管在这个类或filldata方法中可能存在其他实现问题。我的问题是什么是编写代码的正确方法，以便我可以在列表视图中显示评级栏与其他textviews?谢谢你

package com.android.demo.notepad3;
import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.EditText;
import android.widget.RatingBar;
public class NoteA extends BaseAdapter{
    private final LayoutInflater mInflater;
    private EditText mTitleText;
    private EditText mBodyText;
    private RatingBar mRatingBar;
    private NotesDbAdapter mDbHelper;
    Context c1;
    static Cursor c;
    private static boolean autoRequery;

    public NoteA(Context context, int layout, Cursor c, String[] from, int[] to) {
    super(context, c, autoRequery);
    mInflater = LayoutInflater.from(context);
    c1=context;
    this.c=c;
     mDbHelper = new NotesDbAdapter(context);
      mDbHelper.open();
    }
    @Override
public View getView(int arg0, View arg1, ViewGroup arg2) {

      final View view = inflater.inflate(R.layout.notes_row, null);
      mTitleText = (EditText) view.findViewById(R.id.title);
      mBodyText = (EditText) view.findViewById(R.id.body);
      mRatingBar= (RatingBar) view.findViewById(R.id.ratingbar);
      mTitleText.setText(c.getString(
             c.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE)));
     mBodyText.setText(c.getString(
             c.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY)));
     mRatingBar.setRating(c.getFloat(
             c.getColumnIndexOrThrow(NotesDbAdapter.KEY_RATING)));
    return view;
}
     // @Override
//public void bindView(View view, Context context, Cursor cursor) {
//}
//@Override
//public View newView(Context context, Cursor cursor, ViewGroup parent) {
//final View view = mInflater.inflate(R.layout.notes_row, parent, false);
//bindView(view, context, cursor);
//return view;
//}

}

来自Notepad3类的Filldata方法，它扩展了ListActivity

 private void fillData() {
       Cursor notesCursor = mDbHelper.fetchAllNotes();
       startManagingCursor(notesCursor);
        // Create an array to specify the fields we want to display in the list (only TITLE)
       String[] from = new String[]{NotesDbAdapter.KEY_TITLE,NotesDbAdapter.KEY_BODY};
       // and an array of the fields we want to bind those fields to (in this case just text1)
       int[] to = new int[]{R.id.text1,R.id.text2};
         //Now create a simple cursor adapter and set it to display
        ListAdapter notes = new NoteA(this, R.layout.notes_row, notesCursor, from, to);
        setListAdapter(notes);
    }

Answer 1

你需要使用BaseAdapter创建你自己的自定义ListView .

这样的

.

public class MyCustomAdapter extends BaseAdapter{
private Context context;
private List<Phonebook> listPhonebook;
public PhonebookAdapter(Context context, List<Phonebook> listPhonebook) {
    this.context = context;
    this.listPhonebook = listPhonebook;
}
public int getCount() {
    return listPhonebook.size();
}
public Object getItem(int position) {
    return listPhonebook.get(position);
}
public long getItemId(int position) {
    return position;
}
public View getView(int position, View convertView, ViewGroup viewGroup) {
 outInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.phone_row, null); //This should be your Layout with the rating bar
 //Here you can get your widgets for use like this..
  TextView tvPhone = (TextView) convertView.findViewById(R.id.tvMobile);
 //You can do the same thing for the Rating bar you.
    }