I have made Bean class in which we get & set values for name & image and make two other class .
i made MainActivity
class and ListAdapterPlay
class, in which i want to set images in listView item .
But it give NullPointerException
in LayoutInflater
public class ListAdapterPlay extends BaseAdapter {
// private Bean bean;
private ArrayList<Bean> objarraylist;
private Context context;
private LayoutInflater objlayoutinflater;
public ListAdapterPlay(ArrayList<Bean> objarraylist, Context context) {
this.context = context;
this.objarraylist = objarraylist;
objlayoutinflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); //error at this line
// TODO Auto-generated constructor stub
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Bean bean = (Bean) getItem(position);
convertView = objlayoutinflater.inflate(R.layout.listviewrow,null);
// TODO Auto-generated method stub
TextView txt = (TextView) convertView.findViewById(R.id.textView1);
// bean= new Bean();
txt.setText(bean.getName());
ImageView img = (ImageView) convertView.findViewById(R.id.imageView1);
String uri = "drawable/" + bean.getImage();
int imageResource = context.getResources().getIdentifier(uri, null,
context.getPackageName());
Drawable image = context.getResources().getDrawable(imageResource);
img.setImageDrawable(image);
// img.setBackgroundResource()
return convertView;
}
}
i made MainActivity
class as below
public class MainActivity extends Activity {
private ArrayList<Bean> objarraylist;
private ListAdapterPlay objlistadapter;
private ListView listview;
private Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
objarraylist=new ArrayList<Bean>();
objarraylist.add(new Bean("RAM","ic_launcher"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objarraylist.add(new Bean("RAM","lion"));
objlistadapter= new ListAdapterPlay(objarraylist,context);
listview=(ListView)this.findViewById(R.id.listview1);
listview.setAdapter(objlistadapter);
}
}
i want to set images in listView item but it through NullPointerException
in ListAdapterPlay
class.
error is at this line
objlayoutinflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
I am stuck at this situation why? It give NullPointerException
?
public ListAdapterPlay(ArrayList<Bean> objarraylist, Context context) {
this.context = context;
this.objarraylist = objarraylist;
objlayoutinflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); //error at this line
// TODO Auto-generated constructor stub
}
May be the context is null
objlistadapter= new ListAdapterPlay(objarraylist,context);
while constructing the ListAdapterPlay
try
objlistadapter= new ListAdapterPlay(objarraylist,this);