Android ImageAdapter with gridview in fragment

Question

I have an adapter with gridview that works like an Activity. I am trying to put it in a Fragment now and convert things, but that will not work. When I include an IconFragmentSystem in my activity, I gain strength when I try to open an Activity.

I know that activity works because I can use other fragments, and everything is fine, so I know that my problem lies in this file.

package com.designrifts.ultimatethemeui; import com.designrifts.ultimatethemeui.R; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.*; import java.util.ArrayList; public class IconFragmentSystem extends Fragment implements AdapterView.OnItemClickListener{ private static final String RESULT_OK = null; public Uri CONTENT_URI; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.main, container, false); super.onCreate(savedInstanceState); int iconSize=getResources().getDimensionPixelSize(android.R.dimen.app_icon_size); GridView gridview = (GridView) getActivity().findViewById(R.id.icon_grid); gridview.setAdapter(new IconAdapter(this, iconSize)); gridview.setOnItemClickListener(this); CONTENT_URI=Uri.parse("content://"+iconsProvider.class.getCanonicalName()); return view; } @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { String icon=adapterView.getItemAtPosition(i).toString(); Intent result = new Intent(null, Uri.withAppendedPath(CONTENT_URI,icon)); setResult(RESULT_OK, result); finish(); } private void setResult(String resultOk, Intent result) { // TODO Auto-generated method stub } private void finish() { // TODO Auto-generated method stub } private class IconAdapter extends BaseAdapter{ private Context mContext; private int mIconSize; public IconAdapter(Context mContext, int iconsize) { super(); this.mContext = mContext; this.mIconSize = iconsize; loadIcon(); } public IconAdapter(IconFragmentSystem iconssystem, int iconSize) { // TODO Auto-generated constructor stub } @Override public int getCount() { return mThumbs.size(); } @Override public Object getItem(int position) { return mThumbs.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView; if (convertView == null) { imageView = new ImageView(mContext); imageView.setLayoutParams(new GridView.LayoutParams(mIconSize, mIconSize)); } else { imageView = (ImageView) convertView; } imageView.setImageResource(mThumbs.get(position)); return imageView; } private ArrayList<Integer> mThumbs; //////////////////////////////////////////////// private void loadIcon() { mThumbs = new ArrayList<Integer>(); final Resources resources = getResources(); final String packageName = getActivity().getApplication().getPackageName(); addIcon(resources, packageName, R.array.systemicons); } private void addIcon(Resources resources, String packageName, int list) { final String[] extras = resources.getStringArray(list); for (String extra : extras) { int res = resources.getIdentifier(extra, "drawable", packageName); if (res != 0) { final int thumbRes = resources.getIdentifier(extra,"drawable", packageName); if (thumbRes != 0) { mThumbs.add(thumbRes); } } } } } } 

I tried different ways to implement this, but they all failed, and I really could use the help pointing me in the right direction.

This is my xml in layout

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <GridView android:id="@+id/gridview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:columnWidth="90dp" android:numColumns="auto_fit" android:verticalSpacing="10dp" android:horizontalSpacing="10dp" android:stretchMode="columnWidth" android:gravity="center" /> </RelativeLayout> 

Answer 1

I was able to fix the problem

I changed

  GridView gridview = (GridView) getActivity().findViewById(R.id.icon_grid); 

to

  GridView gridview = (GridView) view.findViewById(R.id.icon_grid); 

and I also changed

  gridview.setAdapter(new IconAdapter(this, iconSize)); 

to

  gridview.setAdapter(new IconAdapter(getActivity(), iconSize)); 

Answer 2

Try it...

 gridView = (GridView) rootView.findViewById(R.id.gridView); gridView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view,int pos, long l) { // do something... } }); 

For more information, see this link. Android gridview in the fragment adapter constructor is missing.

mark this as useful.

Answer 3

GridView gridview = (GridView) getActivity().findViewById(R.id.icon_grid);

it should be

GridView gridview = (GridView) container.findViewById(R.id.icon_grid);

 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.main, container, false); int iconSize = getResources().getDimensionPixelSize(android.R.dimen.app_icon_size); GridView gridview = (GridView) view.findViewById(R.id.icon_grid); gridview.setAdapter(new IconAdapter(this, iconSize)); gridview.setOnItemClickListener(this); CONTENT_URI = Uri.parse("content://"+iconsProvider.class.getCanonicalName()); return view; } 

If you want to remove the super call, that is, the remainder of your activity, the fragment does not call this method.