support v7 ActionBar API > 21

[AnguelSC]

Hi, I'm using the Library but for Lollipop devices when I go to preferences, the application stops. Giving me an error.

void android.support.v7.app.ActionBar.setHomeButtonEnabled(boolean)

[ferrannp]

Hello, please could you explain what do you mean here?

[AnguelSC]

Hi, this is the detail error

[ferrannp]

I think you didn't copy the error detail?

[cmatsuoka]

I just stumbled on a similar problem after updating appcompat-v7 to version 23.1.1:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setHomeButtonEnabled(boolean)' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
    at android.app.ActivityThread.access$800(ActivityThread.java:144)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5221)
    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:899)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setHomeButtonEnabled(boolean)' on a null object reference
    at com.fnp.materialpreferences.PreferenceActivity.onCreate(PreferenceActivity.java:44)

It happens in getSupportActionBar().setHomeButtonEnabled(true); in PreferenceActivity's onCreate method.

[ferrannp]

That's probably because you are using a theme without action bar in >21 ? I think I just need to check for null and use always a toolbar in the lib. Let's see if I have a moment to fix this. Thanks for reporting. I think it's the same as #11

[cmatsuoka]

Indeed, this was the problem. Silly me! Thanks :)

    <activity
        android:name=".preferences.Preferences"
        android:theme="@style/AppTheme.NoActionBar" />