I'm trying to implement this gallery in my app using fragment.
I was able to adapt the code for my needing but I get a NullPointerException but I can't figured out why...
The issue is exactly like this one but the user solved it without posting any infos about it so I opened this issue....
This is my code:
GalleriaPersonaggio.java
import java.util.ArrayList;
import android.app.Fragment;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.InflateException;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;
import com.italiandevteam.chuck.adapter.GridViewAdapter;
import com.italiandevteam.chuck.model.ImageItem;
public class GalleriaPersonaggio extends Fragment{
Integer personaggio = null;
public GalleriaPersonaggio( int personaggio ){
this.personaggio = personaggio;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
int id = getIdPersonaggio();
View rootView = null;
if (rootView != null) {
ViewGroup parent = (ViewGroup) rootView.getParent();
if (parent != null)
parent.removeView(rootView);
}
try {
rootView = inflater.inflate(R.layout.gallery_grid, container, false);
} catch (InflateException e) {
}
GridView gridView = (GridView) getView().findViewById(R.id.gridView);
GridViewAdapter customGridAdapter = new GridViewAdapter(getActivity(), R.layout.gallery_row, getData(personaggio));
gridView.setAdapter(customGridAdapter);
return rootView;
}
public int getIdPersonaggio(){
return this.personaggio;
}
private ArrayList getData(int personaggio) {
final ArrayList imageItems = new ArrayList();
// retrieve String drawable array
TypedArray imgs = getResources().obtainTypedArray(R.array.chuck_ids);
for (int i = 0; i < imgs.length(); i++) {
Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(),
imgs.getResourceId(i, -1));
imageItems.add(new ImageItem(bitmap, "Image#" + i));
}
return imageItems;
}
}
This is my GridViewAdapter.java
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.italiandevteam.chuck.R;
import com.italiandevteam.chuck.model.ImageItem;
public class GridViewAdapter extends ArrayAdapter<ImageItem> {
private Context context;
private int layoutResourceId;
private ArrayList<ImageItem> data = new ArrayList<ImageItem>();
public GridViewAdapter(Context context, int layoutResourceId,
ArrayList<ImageItem> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.imageTitle = (TextView) row.findViewById(R.id.text);
holder.image = (ImageView) row.findViewById(R.id.image);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
ImageItem item = data.get(position);
holder.imageTitle.setText(item.getTitle());
holder.image.setImageBitmap(item.getImage());
return row;
}
static class ViewHolder {
TextView imageTitle;
ImageView image;
}
}
and this is my ImageItem.java
import android.graphics.Bitmap;
public class ImageItem {
private Bitmap image;
private String title;
public ImageItem(Bitmap image, String title) {
super();
this.image = image;
this.title = title;
}
public Bitmap getImage() {
return image;
}
public void setImage(Bitmap image) {
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
And this is the LogCat:
12-11 15:03:30.262: E/AndroidRuntime(19554): FATAL EXCEPTION: main
12-11 15:03:30.262: E/AndroidRuntime(19554): java.lang.NullPointerException
12-11 15:03:30.262: E/AndroidRuntime(19554): at com.italiandevteam.chuck.GalleriaPersonaggio.onCreateView(GalleriaPersonaggio.java:46)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.Fragment.performCreateView(Fragment.java:1695)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.BackStackRecord.run(BackStackRecord.java:682)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.os.Handler.handleCallback(Handler.java:730)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.os.Handler.dispatchMessage(Handler.java:92)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.os.Looper.loop(Looper.java:137)
12-11 15:03:30.262: E/AndroidRuntime(19554): at android.app.ActivityThread.main(ActivityThread.java:5103)
12-11 15:03:30.262: E/AndroidRuntime(19554): at java.lang.reflect.Method.invokeNative(Native Method)
12-11 15:03:30.262: E/AndroidRuntime(19554): at java.lang.reflect.Method.invoke(Method.java:525)
12-11 15:03:30.262: E/AndroidRuntime(19554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-11 15:03:30.262: E/AndroidRuntime(19554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-11 15:03:30.262: E/AndroidRuntime(19554): at dalvik.system.NativeStart.main(Native Method)
the line 46 is:
GridView gridView = (GridView) getView().findViewById(R.id.gridView);
