Android Studio: New activity opens as blank screen

Question

Hello!
I\'m just starting in Android Studio. I searched for a matching question but no joy, please yell out if you\'ve seen this one already!

My main activity ha

Answer 1

Have you set the layout for your activity in the line setContentView() like this. Here activity_second is the activity layout of my SecondActivity

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
    }

if not then your activity will show up as blank. Hope this solves your problem.

Answer 2

Check weather you have set the correct layout for the setContentView() method of your second activity.

Answer 3

You can just go to dependencies in build.gradle file and add this line there.. & try.

implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

Answer 4

It sometimes happens when instead of overloading

protected void onCreate(Bundle savedInstanceState) {

you end up overloading

public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) 

instead. Make sure the onCreate with only savedInstanceState as a argument is overloaded.

Answer 5

In my case, I changed device in Android Virtual Divice Manager and this fix problem