单击网格视图中的某个项目时，我试图从光标获取_id字段，相同的代码在列表视图中工作正常，但在这里似乎不起作用：
等级：
CurAdapter Cur;
GridView grid;
onCreate：
Cursor mCur = dbHelper.contactsQuery();
grid = (GridView)rootView.findViewById(R.id.gridview);
Cur = new CurAdapter(getActivity(), mCur,0);
grid.setAdapter(Cur);
grid.setTextFilterEnabled(true);
点击：
grid.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
System.out.println(position);
System.out.println(id);
Cursor cursor = (Cursor) grid.getItemAtPosition(position);
}
});
我的CustomAdapter：
private class CurAdapter extends CursorAdapter{
public CurAdapter(Context context, Cursor c, int flags) {
super(context, c, flags);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView tv = (TextView) view.findViewById(R.id.item_text);
tv.setTypeface(helv_light);
final RoundedImageView iv = (RoundedImageView) view.findViewById(R.id.item_image);
String name = (cursor.getString(cursor.getColumnIndexOrThrow("Name")));
image = cursor.getString(cursor.getColumnIndexOrThrow("imageUri"));
String isAdhoc = (cursor.getString(cursor.getColumnIndexOrThrow("isAdhoc")));
if(isAdhoc.equals("1")){
boolean check = false;
String frName = null;
Cursor mCur = dbHelper.friendsName(name);
if(mCur != null && mCur.moveToFirst()){
do{
frName = mCur.getString(mCur.getColumnIndex("FriendsName"));
if(frName != null){
if(frName.equalsIgnoreCase(selfName)){
check = false;
}else {
check = true;
}
}
}while (mCur.moveToNext());
}
if(check){
name = name+" "+"("+frName+"'s"+" pet)";
}
}
tv.setText(name);
if((image.contains("jpg") || image.contains("png")) && image.contains("adhoc") != true){
image = "file://"+image;
}
final DisplayImageOptions options = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.icon_default)
.showImageForEmptyUri(R.drawable.icon_default)
.showImageOnFail(R.drawable.icon_default)
.resetViewBeforeLoading(true)
.cacheInMemory(true) // default
.cacheOnDisk(true) // default
.build();
ImageLoader.getInstance().displayImage(image, iv, options);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View view = LayoutInflater.from(context).inflate(R.layout.grid_layout, null);
return view;
}
public long getItemId(int position) {
return position;
}
public Object getItem(int position) {
return position;
}
}
我的问题：
11-10 14:51:47.989: E/AndroidRuntime(11194): java.lang.ClassCastException: java.lang.Integer cannot be cast to android.database.Cursor
11-10 14:51:47.989: E/AndroidRuntime(11194): at com.example.FragmentTab3$1.onItemClick(FragmentTab3.java:125)
最佳答案
您正在获取ClassCastException，因为您覆盖了getItem
public Object getItem(int position) {
return position;
}
在您的情况下，它返回的是
int而不是游标。您可以删除它并使用getItem的父实现（应该在位置返回Cursor）