我有一个使用自定义列表适配器的活动。如果填充列表视图的arraylist为空，则向用户显示一个文本框，否则该文本框变为不可见，并显示列表视图。每当arraylist为空时，都会出现该文本框，但是如果不是，则出现空白屏幕。我不确定这是因为我的列表视图不可见还是因为未正确填充它。昨天这个工作很好，但是从那时起我对班级进行了很多更改，而且我不确定是哪个导致了此问题。在过去的几个小时中，我一直在尝试遵循该代码来解决此问题，我注意到，如果我log在getView()适配器的方法，它不会显示，如果我在构造函数中添加它，它会很好显示。我还确保使用来调用适配器并在if语句中输入适当的条件log。我希望你们中的一个能够发现我所不能解决的问题。
调用适配器的方法：
private void PopulateLister(ArrayList<BetDisplayer> listwriterr) {
Log.d("POPULATING", listwriterr.toString());
if (listwriterr.isEmpty()) {
TextView emptybet = (TextView) findViewById(R.id.nobetstxtbox);
// emptybet.setText("None of your bets have been settled yet.");
emptybet.setVisibility(View.VISIBLE);
ListView listView = (ListView) findViewById(R.id.betslistviews);
listView.setVisibility(View.GONE);
}
else if (listwriterr.size() > 0){
TextView emptybet = (TextView) findViewById(R.id.nobetstxtbox);
emptybet.setVisibility(View.GONE);
ListView listView = (ListView) findViewById(R.id.betslistviews);
listView.setVisibility(View.VISIBLE);
if (listwriterr.get(0).getStatus().equals("open")){
ArrayAdapter<BetDisplayer> adapter = new MyListAdapter1();
listView.setAdapter(adapter);
}
else {
ArrayAdapter<BetDisplayer> adapter = new MyListAdapter2();
listView.setAdapter(adapter);
}
}
}
活动的XML：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout23"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:orientation="vertical">
<!-- Main ListView
Always give id value as list(@android:id/list)
-->
<fragment
android:id="@+id/fragment"
android:name="com.example.albert.betterapp.menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:layout="@layout/fragment_menu" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_gravity="center"
android:orientation="horizontal"
android:weightSum="100">
<LinearLayout
android:id="@+id/openbetslayout"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="49"
android:tag=""
android:background="@drawable/bettypeselector"
android:clickable="true">
<TextView
android:id="@+id/openbetstxtview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center"
android:clickable="false"
android:gravity="center"
android:text="Open Bets"
android:textColor="#B4B5AE"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@drawable/seperator">
</LinearLayout>
<LinearLayout
android:id="@+id/closedbetslayout"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="49"
android:tag=""
android:background="@drawable/bettypeselector"
android:clickable="true">
<TextView
android:id="@+id/settledbetstxtview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center"
android:clickable="false"
android:gravity="center"
android:text="Settled Bets"
android:textColor="#B4B5AE"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
<android.support.v4.widget.SwipeRefreshLayout
android:layout_width="fill_parent"
android:id = "@+id/displayallbetsrefresh"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="200dp"
android:id="@+id/nobetstxtbox"
android:text="You currently don't have any open bets saved."
android:textStyle="bold"
android:layout_gravity="center"
android:gravity="center"
android:visibility="gone"
android:textSize="17sp"
android:textColor="#067103"/>
<ListView
android:id="@+id/betslistviews"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/betcolor"></ListView>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
适配器 ：
private class MyListAdapter1 extends ArrayAdapter<BetDisplayer> {
public MyListAdapter1() {
super(DisplayAllBets.this, R.layout.activity_singletotalbet, openbetsarray);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.d("TESTING", "123123123");
itemView = convertView;
if (itemView == null) {
itemView = getLayoutInflater().inflate(R.layout.activity_singletotalbet, parent, false);
}
Button v = (Button) itemView.findViewById(R.id.detailsbutton);
BetDisplayer currentwriter = openbetsarray.get(position);
Log.d("TESTING", currentwriter.getSelections());
Log.d("TESTING2", currentwriter.getSelections());
String selections = currentwriter.getSelections();
int numberofselections = 0;
for (int i = 0; i < selections.length(); i++) {
if (selections.charAt(i) == '/') {
numberofselections++;
}
}
if (numberofselections == 1) {
TextView descriptor = (TextView) itemView.findViewById(R.id.no);
descriptor.setText("Single");
} else if (numberofselections == 2) {
TextView descriptor = (TextView) itemView.findViewById(R.id.no);
descriptor.setText("Double");
} else if (numberofselections == 3) {
TextView descriptor = (TextView) itemView.findViewById(R.id.no);
descriptor.setText("Treble");
} else {
TextView descriptor = (TextView) itemView.findViewById(R.id.no);
descriptor.setText("Accumulator" + "(" + numberofselections + ")");
}
TextView status = (TextView) itemView.findViewById(R.id.status);
status.setText(currentwriter.getStatus());
Log.d("ERRORDEBUG", currentwriter.toString());
if (status.getText().toString().equals("open")) {
TextView winnings = (TextView) itemView.findViewById(R.id.winnings);
winnings.setText("-");
/*LinearLayout displaylayout = (LinearLayout) itemView.findViewById(R.id.displaylayout);
displaylayout.setBackgroundColor(Color.parseColor("#FFFFFF"));
Button b = (Button) itemView.findViewById(R.id.detailsbutton);
b.setBackgroundResource(R.drawable.btnback);*/
}
else if (status.getText().toString().equals("lost")) {
TextView winnings = (TextView) itemView.findViewById(R.id.winnings);
winnings.setText("0");
/*LinearLayout displaylayout = (LinearLayout) itemView.findViewById(R.id.displaylayout);
Button b = (Button) itemView.findViewById(R.id.detailsbutton);
b.setBackgroundResource(R.drawable.btnbacklost);
displaylayout.setBackgroundResource(R.drawable.lost);*/
}
else {
TextView winnings = (TextView) itemView.findViewById(R.id.winnings);
winnings.setText(Integer.toString(currentwriter.getReturns()));
/* Button b = (Button) itemView.findViewById(R.id.detailsbutton);
b.setBackgroundResource(R.drawable.btnback);
LinearLayout displaylayout = (LinearLayout) itemView.findViewById(R.id.displaylayout);
displaylayout.setBackgroundResource(R.drawable.won);*/
}
TextView winningss = (TextView) itemView.findViewById(R.id.winningss);
winningss.setText(Integer.toString(currentwriter.getReturns()));
TextView stakes = (TextView) itemView.findViewById(R.id.stakes);
stakes.setText(Integer.toString(currentwriter.getStake()));
TextView tokens = (TextView) itemView.findViewById(R.id.tokens);
tokens.setText(currentwriter.getId().substring(0,10));
TextView teams = (TextView) itemView.findViewById(R.id.teams);
TextView finalteams = (TextView) itemView.findViewById(R.id.actteams);
String userselectionssetter = currentwriter.getUserselections();
String actteamssetter = currentwriter.getActualselections();
teams.setText(userselectionssetter);
finalteams.setText(actteamssetter);
return itemView;
}
}
您的SwipeRefreshLayout具有2个子视图，如果我没记错的话，这会导致显示问题。您应该有类似这样的东西：
<SwipeRefreshLayout>
<FrameLayout>
<ScrollView>
<TextView/>
</ScrollView>
<ListView/>
</FrameLayout>
</SwipeRefreshLayout>
当显示列表或文本时，这是拉动刷新工作的唯一方法，然后还必须重写canChildScrollUp（）。祝你好运。
否则，将文本放在SwipeRefreshLayout之外，仅将ListView作为其唯一子项放置，但是当显示文本时，将不会有滑动刷新的可能。
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句