【发布时间】：2017-09-26 11:47:46
【问题描述】：
当滚动浏览 6 个图像的列表视图时，前 3 个图像与最后 3 个图像再次重复。文本也从前 3 个重复相同，但我的 toast 消息显示正确的消息，例如。图 1 - 6。
这是适配器类
public class CustomAdapter extends BaseAdapter {
Context context;
List<RowItem> rowItems;
CustomAdapter(Context context, List<RowItem> rowItems) {
this.context = context;
this.rowItems = rowItems;
}
@Override
public int getCount() {
return rowItems.size();
}
@Override
public Object getItem(int position) {
return rowItems.get(position);
}
@Override
public long getItemId(int position) {
return rowItems.indexOf(getItem(position));
}
/* private view holder class */
private class ViewHolder {
ImageView profile_pic;
TextView pic_name;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
View mView;
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
holder.pic_name = (TextView) convertView.findViewById(R.id.pic_name);
holder.profile_pic = (ImageView) convertView.findViewById(R.id.profile_pic);
convertView.setTag(holder);
RowItem row_pos = rowItems.get(position);
holder.profile_pic.setImageResource(row_pos.getProfile_pic_id());
holder.pic_name.setText(row_pos.getPic_name());
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
}
我的主要活动
public class MainActivity extends Activity implements OnItemClickListener {
String[] pic_names;
TypedArray profile_pics;
List<RowItem> rowItems;
ListView mylistview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rowItems = new ArrayList<RowItem>();
pic_names = getResources().getStringArray(R.array.pic_names);
profile_pics = getResources().obtainTypedArray(R.array.profile_pics);
for (int i = 0; i < pic_names.length; i++) {
RowItem item = new RowItem(pic_names[i], profile_pics.getResourceId(i, -1));
rowItems.add(item);
}
mylistview = (ListView) findViewById(R.id.list);
CustomAdapter adapter = new CustomAdapter(this, rowItems);
mylistview.setAdapter(adapter);
mylistview.setOnItemClickListener(this);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String pic_name = rowItems.get(position).getPic_name();
Toast.makeText(getApplicationContext(), "" + pic_name,
Toast.LENGTH_SHORT).show();
}
}
这些是 getter 和 setter
public class RowItem {
private String pic_name;
private int profile_pic_id;
public RowItem(String pic_name, int profile_pic_id) {
this.pic_name = pic_name;
this.profile_pic_id = profile_pic_id;
}
public String getPic_name() {
return pic_name;
}
public void setPic_name(String pic_name) {
this.pic_name = pic_name;
}
public int getProfile_pic_id() {
return profile_pic_id;
}
public void setProfile_pic_id(int profile_pic_id) {
this.profile_pic_id = profile_pic_id;
}
}
【问题讨论】：
标签： java android listview android-studio