我在Viewpager裏面使用了listview,我需要根據child設置ListView的高度,當用戶滾動到Listview的最後位置時我需要添加新的Items。但問題是,當我動態設置列表視圖高度時,它使當前列表視圖項目可見(或選定)。這就是爲什麼自動獲取(調用方法來獲取數據)的原因。 守則如下:在Listview中正確檢測setOnScrollListener在設置Listview高度之後正確地使用
int index = lvNetwork.getFirstVisiblePosition();
View v = lvNetwork.getChildAt(0);
int top = (v == null) ? 0 : v.getTop();
adapter = new NetworkAdapter(activity, R.layout.network_custom_row, networkDataArrayList);
adapter.notifyDataSetChanged();
lvNetwork.setAdapter(adapter);
Utils.setlistViewHeight(lvNetwork, activity);
lvNetwork.setSelectionFromTop(index, top);
lvNetwork.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int finalItem = firstVisibleItem + visibleItemCount;
Log.d("dataCalling", "visible " + finalItem);
Log.d("dataCalling", "total " + totalItemCount);
if (finalItem == totalItemCount) {
if (preLast != finalItem) {
preLast = finalItem;
Log.d("dataCalling", String.valueOf(totalItemCount));
Log.d("dataCalling", "Page " + nextid);
progressBar.setVisibility(View.VISIBLE);
getNetworkFeed();
}
}
}
});
內utils的setlistviewHeight方法,
public static void setlistViewHeight(ListView listView, Context context) {
ListAdapter myListAdapter = listView.getAdapter();
if (myListAdapter == null) {
return;
}
int totalHeight = 0;
for (int size = 0; size < myListAdapter.getCount(); size++) {
View listItem = myListAdapter.getView(size, null, listView);
if (listItem instanceof ViewGroup)
listItem.setLayoutParams(new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
@SuppressWarnings("deprecation")
int screenWidth = display.getWidth();
int listViewWidth = screenWidth - 65;
int widthSpec = View.MeasureSpec.makeMeasureSpec(listViewWidth,
View.MeasureSpec.AT_MOST);
listItem.measure(widthSpec, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (myListAdapter.getCount()));
listView.setLayoutParams(params);
listView.requestLayout();
}
***此代碼的工作好,如果我不需要動態設置列表視圖高度。 我應該在這裏改變什麼,使其工作或任何替代解決方案來獲得慾望的結果?
任何幫助將不勝感激。
你可以發佈內部Utils.setlistViewHeight(lvNetwork,活動)的代碼; ? –
發佈,請檢查。 – Exigente05
日誌更正? visibleItemCount有一個正確的值? – Groco