Onclick监听器Gridview在Fragment中不起作用 [英] Onclick Listener Gridview does not work in Fragment
本文介绍了Onclick监听器Gridview在Fragment中不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
可能是什么问题？
我有3个使用gridview的片段，但onclikitem事件不起作用。 p我尽力而为，我尝试了所有这些，但并非如此。我认为问题在于碎片的使用，因为使用活动很正常。
public View onCreateView（LayoutInflater inflater，ViewGroup container， Bundle savedInstanceState）{
View view = inflater.inflate（R.layout.free_video_fragment，container，false）;
final GridView gridview =（GridView）view.findViewById（R.id.freevideogridview）;
列表< ItemObject> allItems = getAllItemObject（）;
CustomAdapter customAdapter = new CustomAdapter（getActivity（），allItems）;
gridview.setAdapter（customAdapter）;
gridview.setOnItemClickListener（new AdapterView.OnItemClickListener（）{
public void onItemClick（AdapterView<？> parent，final View view，final int position，long id）{
Toast.makeText getActivity（），Position，Toast.LENGTH_LONG）.show（）;
}
}）;
返回视图;
布局：
< GridView xmlns：android =http://schemas.android.com/apk/res/android
android：id =@ + id / freevideogridview
android： layout_width =match_parent
android：layout_height =match_parent
android：gravity =center
android：horizontalSpacing =4dp
android：numColumns =3
android：padding =4dp
android：scrollbars =none
android：stretchMode =columnWidth
android：verticalSpacing =4dp
/>
适配器：
public class CustomAdapter extends BaseAdapter {
private LayoutInflater layoutinflater;
私人列表< ItemObject> listStorage;
私有上下文上下文;
public CustomAdapter（Context context，List< ItemObject> customizedListView）{
this.context = context;
layoutinflater =（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
listStorage = customizedListView;
}
@Override
public int getCount（）{
return listStorage.size（）;
}
@Override
public Object getItem（int position）{
return position;
}
@Override
public long getItemId（int position）{
return position;
}
@Override
public View getView（int position，View convertView，ViewGroup parent）{
ViewHolder listViewHolder;
if（convertView == null）{
listViewHolder = new ViewHolder（）;
convertView = layoutinflater.inflate（R.layout.pop_music_list，parent，false）;
listViewHolder.screenShot =（ImageView）convertView.findViewById（R.id.screen_shot）;
listViewHolder.musicName =（TextView）convertView.findViewById（R.id.music_name）;
listViewHolder.musicAuthor =（TextView）convertView.findViewById（R.id.music_author）;
convertView.setTag（listViewHolder）;
} else {
listViewHolder =（ViewHolder）convertView.getTag（）;
}
listViewHolder.screenShot.setImageResource（listStorage.get（position）.getScreenShot（））;
listViewHolder.musicName.setText（listStorage.get（position）.getMusicName（））;
listViewHolder.musicAuthor.setText（listStorage.get（position）.getMusicAuthor（））;
返回convertView;
}
静态类ViewHolder {
ImageView screenShot;
TextView musicName;
TextView musicAuthor;
}
}
解决方案
@Override
public View getView（int位置，查看convertView，ViewGroup父）{
ViewHolder listViewHolder;
if（convertView == null）{
listViewHolder = new ViewHolder（）;
convertView = layoutinflater.inflate（R.layout.pop_music_list，parent，null）;
listViewHolder.screenShot =（ImageView）convertView.findViewById（R.id.screen_shot）;
listViewHolder.musicName =（TextView）convertView.findViewById（R.id.music_name）;
listViewHolder.musicAuthor =（TextView）convertView.findViewById（R.id.music_author）;
convertView.setTag（listViewHolder）;
} else {
listViewHolder =（ViewHolder）convertView.getTag（）;
}
listViewHolder.screenShot.setImageResource（listStorage.get（position）.getScreenShot（））;
listViewHolder.musicName.setText（listStorage.get（position）.getMusicName（））;
listViewHolder.musicAuthor.setText（listStorage.get（position）.getMusicAuthor（））;
返回convertView;
放入 null in放置视图的位置 false
I have 3 fragments with gridview but onclikitem event does not work.
What might be the problem?
I did my best and I tried all of them but not true. I think the problem is the use of fragments because with use activity works fine.
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.free_video_fragment, container, false);
final GridView gridview = (GridView) view.findViewById(R.id.freevideogridview);
List<ItemObject> allItems = getAllItemObject();
CustomAdapter customAdapter = new CustomAdapter(getActivity(), allItems);
gridview.setAdapter(customAdapter);
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, final View view, final int position, long id) {
Toast.makeText(getActivity(),"Position" , Toast.LENGTH_LONG).show();
}
});
return view;
Layout:
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/freevideogridview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:horizontalSpacing="4dp"
android:numColumns="3"
android:padding="4dp"
android:scrollbars="none"
android:stretchMode="columnWidth"
android:verticalSpacing="4dp"
/>
Adapter:
public class CustomAdapter extends BaseAdapter {
private LayoutInflater layoutinflater;
private List<ItemObject> listStorage;
private Context context;
public CustomAdapter(Context context, List<ItemObject> customizedListView) {
this.context = context;
layoutinflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
listStorage = customizedListView;
}
@Override
public int getCount() {
return listStorage.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder listViewHolder;
if(convertView == null){
listViewHolder = new ViewHolder();
convertView = layoutinflater.inflate(R.layout.pop_music_list, parent, false);
listViewHolder.screenShot = (ImageView)convertView.findViewById(R.id.screen_shot);
listViewHolder.musicName = (TextView)convertView.findViewById(R.id.music_name);
listViewHolder.musicAuthor = (TextView)convertView.findViewById(R.id.music_author);
convertView.setTag(listViewHolder);
}else{
listViewHolder = (ViewHolder)convertView.getTag();
}
listViewHolder.screenShot.setImageResource(listStorage.get(position).getScreenShot());
listViewHolder.musicName.setText(listStorage.get(position).getMusicName());
listViewHolder.musicAuthor.setText(listStorage.get(position).getMusicAuthor());
return convertView;
}
static class ViewHolder{
ImageView screenShot;
TextView musicName;
TextView musicAuthor;
}
}
解决方案
I think you have to change in your adapter like below.
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder listViewHolder;
if(convertView == null){
listViewHolder = new ViewHolder();
convertView = layoutinflater.inflate(R.layout.pop_music_list, parent, null);
listViewHolder.screenShot = (ImageView)convertView.findViewById(R.id.screen_shot);
listViewHolder.musicName = (TextView)convertView.findViewById(R.id.music_name);
listViewHolder.musicAuthor = (TextView)convertView.findViewById(R.id.music_author);
convertView.setTag(listViewHolder);
}else{
listViewHolder = (ViewHolder)convertView.getTag();
}
listViewHolder.screenShot.setImageResource(listStorage.get(position).getScreenShot());
listViewHolder.musicName.setText(listStorage.get(position).getMusicName());
listViewHolder.musicAuthor.setText(listStorage.get(position).getMusicAuthor());
return convertView;
}
put null in place of false at where you inflate your view.
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