我试图在我的列表视图中使用 scrollBy 方法并在列表中滚动，但会通过剪切项目使列表看起来很奇怪。
我试图通过使用类似的东西来刷新列表
l.invalidate();
l.requestLayout();
l.forceLayout();
l.invalidateViews();
l.postInvalidate();
l.refreshDrawableState();
但效果不佳：向下滚动 150 像素后查看图片
data5 下方还有更多条目，但已被剪裁。
代码：
public class TestListViewScrollActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ListView l = (ListView)findViewById(R.id.listView1);
final MyAdapter adapter = new MyAdapter(getApplicationContext());
l.setAdapter(adapter);
l.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
adapter.add();
l.scrollBy(0, 150);
l.invalidate();
l.requestLayout();
l.forceLayout();
l.invalidateViews();
l.postInvalidate();
l.refreshDrawableState();
}
});
}
}
class MyAdapter extends BaseAdapter {
ArrayList data = new ArrayList();
Context context;
public MyAdapter(Context context) {
data.add("data1");
data.add("data2");
data.add("data3");
data.add("data4");
data.add("data5");
data.add("data6");
data.add("data7");
data.add("data8");
data.add("data9");
this.context = context;
}
public void add() {
//data.add(0, "new data");
//notifyDataSetInvalidated();
notifyDataSetChanged();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return data.size();
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if (convertView == null) {
LayoutInflater vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.listitem, null);
} else {
v = convertView;
}
TextView text = (TextView) v.findViewById(R.id.text);
text.setText((String)data.get(position));
return v;
}
}