ListView有＆＃34;空白＆＃34;行
我的列表视图大小没有根据适配器进行更新，我不知道为什么
（这是在我根据某个类别进行过滤后发生的，因此我也会发布类别过滤器）
在查看图像后，您可以看到已过滤的选项卡中有额外的空白行。
＆＃34; All＆＃34;的图像标签：
这是我的getView方法：
public View getView(int position,View view,ViewGroup parent) {
LayoutInflater inflater = ctx.getLayoutInflater();
View rowView = inflater.inflate(R.layout.list_item, null, true);
try {
Item i = getForName(names.get(position));
if (i.isCategory()) {
rowView = inflater.inflate(R.layout.cat_item, null, true);
TextView text = (TextView) rowView.findViewById(R.id.catTxt);
text.setText(i.getTitle());
text.setTypeface(null, Typeface.BOLD);
} else {
TextView text = (TextView) rowView.findViewById(R.id.listText);
ImageView image = (ImageView) rowView.findViewById(R.id.listImage);
try {
text.setText(names.get(position));
image.setImageResource(imageIds.get(position));
} catch (Exception e) {
}
}
} catch(Exception a ) {
a.printStackTrace();
}
return rowView;
};
这是类别过滤方法：
public void filterCategories(Context context) {
ArrayList<String> currNames = new ArrayList<>(); //List of the names in the current category (When we start looping)
ArrayList<Integer> currImaages = new ArrayList<>(); //List of the drawable IDs in the current category (When we start looping)
ArrayList<String> n = new ArrayList<>(); //Will be the finalized names list
ArrayList<Integer > is = new ArrayList<>(); //Will be the finalized id list
for(String name : names) {
Item item = getForName(name);
if(item != null)
if(item.isCategory()) {
String cat = item.getAcronym();
for(String n1 : names) {
Item i1 = getForName(n1);
if(i1 != null && !i1.isCategory() && i1.getParent() != null && !currNames.contains(i1.getTitle())) {
if(i1.getParent().equals(cat)) {
currNames.add(n1);
currImaages.add(context.getResources().getIdentifier(getForName(n1).getThumbnail(), "drawable", context.getPackageName()));
}
}
}
n.add(name);
is.add(0);
int c = 0;
for(String x : currNames) {
n.add(x);
is.add(currImaages.get(c));
c++;
}
}
currNames = new ArrayList<>();
currImaages = new ArrayList<>();
}
names = new ArrayList<>();
imageIds = new ArrayList<>();
for(String a : n) {
names.add(a);
}
for(Integer a : is) {
imageIds.add(a);
}
notifyDataSetChanged();
}
这里是a.printStackTrace（）的输出：
06-04 09:51:38.835 17900-17900/packagename W/System.err﹕ java.lang.IndexOutOfBoundsException: Invalid index 9, size is 7
06-04 09:51:38.835 17900-17900/packagename W/System.err﹕ at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
06-04 09:51:38.835 17900-17900/packagename W/System.err﹕ at java.util.ArrayList.get(ArrayList.java:308)
06-04 09:51:38.835 17900-17900/packagename W/System.err﹕ at packagename.util.ListAdapter.getView(ListAdapter.java:46)
06-04 09:51:38.835 17900-17900/packagename W/System.err﹕ at android.widget.AbsListView.obtainView(AbsListView.java:2387)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.ListView.makeAndAddView(ListView.java:1864)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.ListView.fillDown(ListView.java:698)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.ListView.fillSpecific(ListView.java:1356)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.ListView.layoutChildren(ListView.java:1651)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.AbsListView.onLayout(AbsListView.java:2191)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1705)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1559)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.onLayout(LinearLayout.java:1468)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:907)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:493)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1705)
06-04 09:51:38.836 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1559)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.widget.LinearLayout.onLayout(LinearLayout.java:1468)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.View.layout(View.java:15654)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4967)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2102)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1859)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1078)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5875)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.Choreographer.doCallbacks(Choreographer.java:580)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.Choreographer.doFrame(Choreographer.java:550)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:739)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95)
06-04 09:51:38.837 17900-17900/packagename W/System.err﹕ at android.os.Looper.loop(Looper.java:135)
06-04 09:51:38.841 17900-17900/packagename W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5299)
06-04 09:51:38.841 17900-17900/packagename W/System.err﹕ at java.lang.reflect.Method.invoke(Native Method)
06-04 09:51:38.841 17900-17900/packagename W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:372)
06-04 09:51:38.841 17900-17900/packagename W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
06-04 09:51:38.841 17900-17900/packagename W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
4 个答案:
答案 0 :(得分：1)
问题是您处理的getView方法有误。在这里，我将添加一个示例代码。
第1步 你需要一个像这样的viewHolder类。在这里添加你的膨胀的xml小部件：
/********* Create a holder Class to contain inflated xml file elements *********/
public static class ViewHolder{
public TextView text;
public TextView text1;
public TextView textWide;
public ImageView image;
}
第2步
在你的getView方法
中/****** Depends upon data size called for each row , Create each ListView row *****/
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView==null){
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
vi = inflater.inflate(R.layout.tabitem, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
holder = new ViewHolder();
holder.text = (TextView) vi.findViewById(R.id.text);
holder.text1=(TextView)vi.findViewById(R.id.text1);
holder.image=(ImageView)vi.findViewById(R.id.image);
/************ Set holder with LayoutInflater ************/
vi.setTag( holder );
}
else
holder=(ViewHolder)vi.getTag();
return vi;
}
这是示例问任何疑问
答案 1 :(得分：1)
在arraylist或hashmap中添加您的值并发送到您的Adapter。使用ViewHolder实现有效的ui元素可访问性。
答案 2 :(得分：1)
找到答案，原来我是个白痴。
只需要覆盖getCount
@Override
public int getCount() {
return names.size();
}
答案 3 :(得分：0)
我无法从您发布的代码中看到，但我认为您的适配器没有看到任何更改，因为它仍然引用您使用的原始列表。过滤时，不要为适配器创建新列表，而是更新原始列表。
所以，而不是使用它：
ArrayList<String> n = new ArrayList<>(); //Will be the finalized names list
刚刚更新了names数组
更多信息：只是一个有用的提示，您的getView()每次都会让视图膨胀而且价格昂贵。一种流行的方法是使用viewHolder模式。
Lars Vogella有一个很棒的教程：
http://www.vogella.com/tutorials/AndroidListView/article.html#adapterperformance_holder
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