我使用 simplecursoradapter 填充了一个列表视图。但是，我想添加图像，其中如果答案正确，则应在右侧显示检查，如果为空或不正确，则应显示 x 标记。它不显示任何内容，但没有错误。这是我的活动代码：
public class Results extends ListActivity{
DBAdapter db = new DBAdapter(this);
private Cursor mCursor;
ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.resultslist);
db.open();
fillData();
db.close();
}
private void fillData() {
mCursor = db.getAllInfo();
startManagingCursor(mCursor);
String[] from = new String[]{DBAdapter.KEY_QUESTIONS, DBAdapter.KEY_CORRECTANSWERS, DBAdapter.KEY_YOURANSWERS};
int[] to = new int[]{R.id.textViewquestionresults, R.id.textViewcorrectansresults, R.id.textViewyouranswerresults};
SimpleCursorAdapter c=
new SimpleCursorAdapter(this, R.layout.rowresults, mCursor, from, to);
setListAdapter(c);
}
private class c extends SimpleCursorAdapter{
Context lcontext;
public c(Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
lcontext = context;
}
@Override
public View getView(final int pos, View v, ViewGroup parent) {
v = super.getView(pos, v, parent);
final ImageView iv = (ImageView) v.findViewById(R.id.imageViewresults);
final TextView tvQuestion = (TextView) v.findViewById(R.id.textViewQuestion);
final TextView tvCorrectAns = (TextView) v.findViewById(R.id.textViewcorrectansresults);
final TextView tvYourAns = (TextView) v.findViewById(R.id.textViewyouranswerresults);
if(tvYourAns.equals(tvCorrectAns)){
iv.setImageResource(R.drawable.greencheckmark);
}else{
iv.setImageResource(R.drawable.redxmark);
}
return v;
}
}
}