I'm using custom ListView
and Adapter
for load image and description into ListView
. All the data loading from MySQL database. Then I try to scroll my list then automatically close my application. How can I solve this close problem?
Adapter class
public class ItemAdapter extends BaseAdapter {
private Context mContext;
private List<Item> mItemList;
public ItemAdapter(Context mContext, List<Item> mItemList) {
this.mContext = mContext;
this.mItemList = mItemList;
}
@Override
public int getCount() {
return mItemList.size();
}
@Override
public Object getItem(int position) {
return mItemList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = View.inflate(mContext, R.layout.item_item, null);
holder = new ItemAdapter.ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ItemAdapter.ViewHolder) convertView.getTag();
}
holder.name.setText(mItemList.get(position).getItemName());
holder.desc.setText(mItemList.get(position).getItemDesc());
Picasso.with(mContext).load(mItemList.get(position).getImgUrl()).into(holder.image);
convertView.setTag(mItemList.get(position).getItemId());
return convertView;
}
private static class ViewHolder {
private TextView name;
private TextView desc;
private ImageView image;
public ViewHolder(View v) {
name = (TextView) v.findViewById(R.id.item_name);
desc = (TextView) v.findViewById(R.id.item_description);
image = (ImageView) v.findViewById(R.id.img_item);
}
}
}
Item custom layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_marginTop="10dp"
android:paddingLeft="10dp"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:background="#ffffff"
android:scrollbars="vertical">
<android.support.v7.widget.CardView
android:id="@+id/item_cardview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:elevation="3dp"
card_view:cardUseCompatPadding="true"
card_view:cardElevation="4dp"
card_view:cardCornerRadius="1dp"
app:cardCornerRadius="6dp"
app:cardElevation="3dp"
app:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/img_item"
android:layout_width="match_parent"
android:layout_height="100dp"
android:src="@drawable/dap_launcher"
android:layout_marginLeft="15dp"
android:clickable="true"/>
<TextView
android:id="@+id/item_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/img_item"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:textStyle="bold"
android:text="Item Name"
android:textSize="15dp"
android:layout_marginTop="2dp"/>
<TextView
android:id="@+id/item_description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/item_name"
android:layout_marginTop="5dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:text="Item Description"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
List layout
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/listview_item"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:dividerHeight="10dp"
android:divider="#d1d1d1">
</ListView>
</RelativeLayout>
Logcat
07-13 15:37:43.853 25410-25410/com.example.swserver03.dap D/AndroidRuntime: Shutting down VM
07-13 15:37:43.855 25410-25410/com.example.swserver03.dap E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.swserver03.dap, PID: 25410
java.lang.ClassCastException: java.lang.Integer cannot be cast to com.example.swserver03.dap.Adapter.ItemAdapter$ViewHolder
at com.example.swserver03.dap.Adapter.ItemAdapter.getView(ItemAdapter.java:47)
at android.widget.AbsListView.obtainView(AbsListView.java:2428)
at android.widget.ListView.makeAndAddView(ListView.java:2083)
at android.widget.ListView.fillDown(ListView.java:793)
at android.widget.ListView.fillGap(ListView.java:757)
at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5520)
at android.widget.ListView.trackMotionScroll(ListView.java:1991)
at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:5052)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:981)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
at android.view.Choreographer.doFrame(Choreographer.java:718)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:967)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:101)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7425)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)
07-13 15:37:43.868 25410-25410/com.example.swserver03.dap I/Process: Sending signal. PID: 25410 SIG: 9
I find some simple way to resolve the problem.
I added setId
to my getView
. Then I can use getId
for my setOnItemClickListener
getView() in Adapter
convertView.setId(mItemList.get(position).getItemId());
convertView.setTag(holder);
setOnItemClickListener() in Item class
lvItem.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getActivity(),"Item ID : " + view.getId(),Toast.LENGTH_SHORT).show();
}
});