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像標題中所述我嘗試在片段中使用OnItemClickListener(它不擴展ListFragment,它只是一個片段),但聽衆似乎沒有迴應。OnItemClickListener在片段與CustomAdapter不起作用
它是如何工作: 我創建了包含自定義ListViewItem的一個ListView片段,內容是從一個MySQL表下載與連接到PHP文件一類叫做下載和一類稱爲解析器,把特定的JSON結果成絃樂。有一個CustomAdapter接受結果並使用Parser的結果更改自定義ListViewItem的TextView。
創建ListView沒有問題,內容得到顯示。 片段代碼:
public class BiologyFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
String url = "URL FOR PHP - just cut that out :D";
private SwipeRefreshLayout ll;
private ListView lv;
private boolean isRefreshing;
private Handler refreshhandler = new Handler();
public BiologyFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
ll = (SwipeRefreshLayout)inflater.inflate(R.layout.fragment_biology, container, false);
//set up listener for pull to refresh
ll.setOnRefreshListener(this);
//Listview for the to be populated
lv = (ListView) ll.findViewById(R.id.lv);
//download on opening
new Downloader(getContext(), url, lv).execute();
//PROBLEM HERE !
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getContext(), "CLICKED " + position, Toast.LENGTH_SHORT).show();
}
});
lv.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
boolean enable = false;
if (lv != null && lv.getChildCount() > 0) {
// check if the first item of the list is visible
boolean firstItemVisible = lv.getFirstVisiblePosition() == 0;
// check if the top of the first item is visible
boolean topOfFirstItemVisible = lv.getChildAt(0).getTop() == 0;
// enabling or disabling the refresh layout
enable = firstItemVisible && topOfFirstItemVisible;
}
ll.setEnabled(enable);
}
});
return ll;
}
@Override
public void onRefresh() {
new Downloader(getContext(), url, lv).execute();
refreshhandler.post(refreshing);
}
Runnable refreshing = new Runnable() {
@Override
public void run() {
if(isRefreshing){
// re run the verification after 1 second
}else{
// stop the animation after the data is fully loaded
ll.setRefreshing(false);
}
}
};
}
片段的XML:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants">
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/lv"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="false"
/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@drawable/ic_menu_slideshow" />
</FrameLayout>
如果你只需要在ListViewItem的XML或CustomAdapter,下載或解析器類讓我知道,我會在這裏發佈,但我不確定這些是否有必要解決問題。
感謝您的關注!
這似乎沒有工作 「需要android.support.v4.widget.SwipeRefreshLayout 找到android.view.View」 – ProgFroz
@JustinN讓我更新我的代碼。 – Amir
您的代碼確實無誤地工作,但我無法再刷新,當我嘗試讓該圈子繼續在那裏而沒有做任何事情時。此外,它不能解決我的問題與onItemClickListener:/ – ProgFroz