Attempt to invoke virtual method 'android.content.res.AssetManager android.content.res.Resources.getAssets()' on a null object reference

Question

What is happening:

1. I have a stacktrace from the appstore as below, problem i am facing is that it dosen't show which class has caused this crash.
2. what i can understand is that its causing due to the assets that i have used
3. Only place i am using assets is at the application level to set the font

Code:

private void setDefaultFont() {

        try {
            final Typeface bold = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Bold.ttf");
            final Typeface italic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Italic.ttf");
            final Typeface boldItalic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-BoldItalic.ttf");
            final Typeface regular = Typeface.createFromAsset(getAssets(),"fonts/OpenSans-Regular.ttf");

            Field DEFAULT = Typeface.class.getDeclaredField("DEFAULT");
            DEFAULT.setAccessible(true);
            DEFAULT.set(null, regular);

            Field DEFAULT_BOLD = Typeface.class.getDeclaredField("DEFAULT_BOLD");
            DEFAULT_BOLD.setAccessible(true);
            DEFAULT_BOLD.set(null, bold);

            Field sDefaults = Typeface.class.getDeclaredField("sDefaults");
            sDefaults.setAccessible(true);
            sDefaults.set(null, new Typeface[]{
                    regular, bold, italic, boldItalic
            });

        } catch (NoSuchFieldException e) {
           // logFontError(e);
        } catch (IllegalAccessException e) {
           // logFontError(e);
        } catch (Throwable e) {
            //cannot crash app if there is a failure with overriding the default font!
           // logFontError(e);
        }
    }

StackTrace from Appstore:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.AssetManager android.content.res.Resources.getAssets()' on a null object reference
at android.app.LoadedApk.getAssets(LoadedApk.java:528)
at android.app.LoadedApk.makeApplication(LoadedApk.java:584)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4526)
at android.app.ActivityThread.access$1500(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

What approach should i need to take to resolve this??

Answer 1

I saw this too from Lollipop devices with the same stacktrace, also without any reference to own code. It seems to be a platform bug coming from incomplete app updates, see https://code.google.com/p/android/issues/detail?id=56296

Answer 2

Try to declare the font styles separately (not in the same line), as following, change:

final Typeface bold = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Bold.ttf");
final Typeface italic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Italic.ttf");
final Typeface boldItalic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-BoldItalic.ttf");
final Typeface regular = Typeface.createFromAsset(getAssets(),"fonts/OpenSans-Regular.ttf");

to:

final Typeface bold;
final Typeface italic;
final Typeface boldItalic;
final Typeface regular;

bold = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Bold.ttf");
italic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-Italic.ttf");
boldItalic = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-BoldItalic.ttf");
regular = Typeface.createFromAsset(getAssets(),"fonts/OpenSans-Regular.ttf");