我有一个包含自定义适配器和自定义行的列表。
问题是当我滚动列表视图时,图像处于错误的位置......
这是自定义行xml:
<LinearLayout
android:id="@+id/imagequality_listview_row_linearlayout"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:weightSum="1"
android:orientation="horizontal" xmlns:android="http://schemas.android.com/apk/res/android">
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/imagequality_listview_row_textview"
android:layout_width="0dp"
android:layout_height="40dip"
android:gravity="right"
android:paddingLeft="5dip"
android:drawableLeft="?android:attr/listChoiceIndicatorMultiple"
android:layout_weight="0.6"
/>
<com.example.listviewtest.LoaderImageView
android:id="@+id/imagequality_listview_row_loaderImageView"
android:layout_width="0dp"
android:layout_weight="0.4"
android:layout_height="100dp"
image="http://developer.android.com/images/dialog_buttons.png"
/>
</LinearLayout>
以下是GetView:
List<ImageQuality_Item> items;
Context context;
List<CheckedTextView> checkedList;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = View.inflate(context, R.layout.imagequality_listview_row, null);
holder = new ViewHolder();
holder.layout = (LinearLayout) convertView.findViewById(R.id.imagequality_listview_row_linearlayout);
holder.textview = (CheckedTextView) convertView.findViewById(R.id.imagequality_listview_row_textview);
holder.image = (LoaderImageView) convertView.findViewById(R.id.imagequality_listview_row_loaderImageView);
checkedList.add(holder.textview);
holder.layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
for (int i = 0; i < checkedList.size(); i++)
if (checkedList.get(i).isChecked())
checkedList.get(i).setChecked(false);
((CheckedTextView) ((LinearLayout) v).getChildAt(0)).setChecked(true);
}
});
holder.textview.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
for (int i = 0; i < checkedList.size(); i++)
if (checkedList.get(i).isChecked())
checkedList.get(i).setChecked(false);
((CheckedTextView) v).setChecked(true);
}
});
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
holder.textview.setText(items.get(position).getDescription());
if (holder.image.used == false) {
holder.image.setImageDrawable(items.get(position).getURL());
holder.image.used = true;
}
return convertView;
}
class ViewHolder {
LinearLayout layout;
LoaderImageView image;
CheckedTextView textview;
}
我该如何解决这个问题?
答案 0 :(得分:3)
每次调用Drawable
时都必须设置getView()
,因为android正在重用列表元素。如果您不更新,可能会出现较早设置的图像。
只需删除条件即可将图像设置为可绘制,并且它可以正常工作。