androidasset-management

nullPointer Exception on Asset manager

I have this function in my class Activity :

private Bitmap getBitmapFromAsset(String strName) {
    AssetManager assetManager =this.getAssets();
    InputStream istr = null;
    try {
        istr = assetManager.open(strName);
    } catch (IOException e) {
        e.printStackTrace();
    }
    Bitmap bitmap = BitmapFactory.decodeStream(istr);
    return bitmap;
}

this function is in public class Game1 extends Activity

but I get nullpointer exception on :

AssetManager assetManager = this.getAssets();
Caused by: java.lang.NullPointerException at packagename.Game1.getBitmapFromAsset

what should I do?

Solution

  • You need to call getBitmapFromAsset() after the activity is created. If you call it before the activity creation then it will give NullPointerException.

    The code then -

    AssetManager assetManager = this.getAssets();

    Here the this = getActivity() and therefore is null.