androidTag androidTag - 3 months ago 106
Android Question

Android :NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference

I'm trying to get image from sd card into bitmap for displaying in Image-view.After run the application first two to three images are displayed but when i scrolling list application is crashed and getting exception of NullPointerException : java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
at com.example.tazeen.classnkk.Activity1$MyListAdapter.getView(Activity1.java:357)


if(objElement.endsWith(mp3_Pattern))
{
Log.e("Mp3 ", " ends with ");

{
int scalFactor = fixHeight / h ;
newWidth = (int)( w * scalFactor);
Log.e("scalFactor "," = " + scalFactor);
Log.e("newWidth "," = " + newWidth);
Log.e("resizing... ","in if condition");
new_Height = fixHeight ;
}
else
{
newWidth = w;
new_Height = h;
}


Uri uri = Uri.fromFile(new File(objElement));
Picasso.with(getContext()).load(uri).resize(newWidth, new_Height).placeholder(R.drawable.img_placeholder).into(imageView , new com.squareup.picasso.Callback() {
@Override
public void onSuccess() {
if (pBar != null) {
pBar.setVisibility(View.GONE);
}
}
@Override
public void onError() {

}
});
}

holder.linearLayout.addView(imageView);
holder.linearLayout.addView(pBar);


Here is log information

08-28 14:22:14.077 2947-2947/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.tazeen.classnkk, PID: 2947
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
at com.example.tazeen.classnkk.AllPosts_Page$MyListAdapter.getView(AllPosts_Page.java:357)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.ListView.makeAndAddView(ListView.java:1864)
at android.widget.ListView.fillDown(ListView.java:698)
at android.widget.ListView.fillGap(ListView.java:662)
at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991)
at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3418)
at android.widget.AbsListView.onTouchMove(AbsListView.java:3801)
at android.widget.AbsListView.onTouchEvent(AbsListView.java:3632)
at android.view.View.dispatchTouchEvent(View.java:8471)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2399)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2092)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)

Answer

try this. inside your if (objElement.endsWith(png_Pattern))

  BitmapFactory.Options options = new BitmapFactory.Options();
  options.inPreferredConfig = Bitmap.Config.ARGB_8888;
  Bitmap bitmap = BitmapFactory.decodeFile(objElement, options);