Hello I'm new to Android programming and I have two errors that I cannot figure out I tried googling the issue and still no luck so my last resort is here like it should be! I'm creating Android launcher that has multiple tabs with swipe gestures to get from one fragment to the other all of my screens are working just fine except for the shelfviewactivity ( even though it says activity is a fragment)
These are the two errors I am getting into not understand how to fix:
Multiple markers at this line
- The method setContentView(int) is undefined for the type
ShelfViewActivity
- The method setContentView(int) is undefined for the type
ShelfViewActivity
error2:
The constructor ShelfViewActivity.VerticalAdapter(ShelfViewActivity, int, ArrayList<ArrayList<BookItem>>) is
undefined
Here is ShelfViewActivity:
package com.d4a.tobias;
import java.util.ArrayList;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class ShelfViewActivity extends ListFragment {
/** Called when the activity is first created. */
private VerticalAdapter verListAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.main, container, false);
}
/*
* Calling Library & BookItem classes for create list of groups
* groupbyArrayBookItem return back array of array of items
*/
Library lb = new Library();{
for (BookItem item : BookItem.ALL_BOOKS) {
lb.addBookItem(item);
} //line 32
ArrayList<ArrayList<BookItem>> groupList = new ArrayList<ArrayList<BookItem>>();
groupList = lb.groupbyArrayBookItem(Library.AUTHOR);
verListAdapter = new VerticalAdapter(getActivity(), R.layout.bookrow, groupList);
setListAdapter(verListAdapter);
verListAdapter.notifyDataSetChanged();
}
/**
* This class add a list of ArrayList to ListView that it include multi
* items as bookItem.
*/
private class VerticalAdapter extends ArrayAdapter<ArrayList<BookItem>> {
private int resource;
public VerticalAdapter(Context _context, int _ResourceId,
ArrayList<ArrayList<BookItem>> _items) {
super(_context, _ResourceId, _items); //line 52
this.resource = _ResourceId;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView;
if (convertView == null) {
rowView = LayoutInflater.from(getContext()).inflate(resource,
null);
} else {
rowView = convertView;
}
HorizontalListView hListView = (HorizontalListView) rowView
.findViewById(R.id.subListview);
HorizontalAdapter horListAdapter = new HorizontalAdapter(
getContext(), R.layout.item, getItem(position));
hListView.setAdapter(horListAdapter);
return rowView;
}
}
/*
* This class add some items to Horizontal ListView this ListView include
* several bookItem.
*/
private class HorizontalAdapter extends ArrayAdapter<BookItem> {
private int resource;
public HorizontalAdapter(Context _context, int _textViewResourceId,
ArrayList<BookItem> _items) {
super(_context, _textViewResourceId, _items);
this.resource = _textViewResourceId;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View retval = LayoutInflater.from(getContext()).inflate(
this.resource, null);
TextView topText = (TextView) retval.findViewById(R.id.title);
TextView bottomText = (TextView) retval
.findViewById(R.id.author);
topText.setText(getItem(position).getAuthor());
bottomText.setText(getItem(position).getTitle());
return retval;
}
}
}
EDIT: app now launches but i get a crash on Shelf View Activity
heres the logcat:
11-11 17:17:44.500: E/AndroidRuntime(23305): FATAL EXCEPTION: main
11-11 17:17:44.500: E/AndroidRuntime(23305): Process: com.d4a.tobias, PID: 23305
11-11 17:17:44.500: E/AndroidRuntime(23305): java.lang.NullPointerException
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.widget.ArrayAdapter.init(ArrayAdapter.java:310)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:153)
11-11 17:17:44.500: E/AndroidRuntime(23305): at com.d4a.tobias.ShelfViewActivity$VerticalAdapter.<init>(ShelfViewActivity.java:52)
11-11 17:17:44.500: E/AndroidRuntime(23305): at com.d4a.tobias.ShelfViewActivity.<init>(ShelfViewActivity.java:36)
11-11 17:17:44.500: E/AndroidRuntime(23305): at it.gmariotti.android.examples.googleaccount.MainFrag$MyAdapter.getItem(MainFrag.java:80)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:95)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:649)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.support.v4.view.ViewPager.populate(ViewPager.java:783)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.support.v4.view.ViewPager.completeScroll(ViewPager.java:1280)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.support.v4.view.ViewPager.computeScroll(ViewPager.java:1176)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13315)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13372)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13268)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13372)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13268)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13372)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13268)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13372)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13268)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.View.getDisplayList(View.java:13372)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewRootImpl.draw(ViewRootImpl.java:2379)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2251)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1881)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5582)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.Choreographer.doFrame(Choreographer.java:532)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.os.Handler.handleCallback(Handler.java:733)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.os.Handler.dispatchMessage(Handler.java:95)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.os.Looper.loop(Looper.java:137)
11-11 17:17:44.500: E/AndroidRuntime(23305): at android.app.ActivityThread.main(ActivityThread.java:4998)
11-11 17:17:44.500: E/AndroidRuntime(23305): at java.lang.reflect.Method.invokeNative(Native Method)
11-11 17:17:44.500: E/AndroidRuntime(23305): at java.lang.reflect.Method.invoke(Method.java:515)
11-11 17:17:44.500: E/AndroidRuntime(23305): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
11-11 17:17:44.500: E/AndroidRuntime(23305): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
11-11 17:17:44.500: E/AndroidRuntime(23305): at dalvik.system.NativeStart.main(Native Method)
11-11 17:17:51.318: E/ACDB-LOADER(177): Error: ACDB AudProc vol returned = -8
Any links or references to show me what I'm doing wrong would be fantastic
Thanks 1,000,000 times in advance
