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Android Build a Simple Android App (2014) Improving Our Code Adding More Colors

Keishi Mii
Keishi Mii
3,122 Points

App keeps crashing after the step where the background should be switching colors randomly

I have followed the video exactly, but when I try to run the app it will just force exit the application instead of switching colors.

2 Answers

Hi,

Can you please post the code of the activity which is causing the application crash as well as some logcat output?

Thanks.

Martin Georgiev
Martin Georgiev
13,541 Points

Hey,

I have the same issue as well. After adding an Id to the RelativeLayout and trying to change it dynamically my app crashes. I receive the following error: "Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.RelativeLayout" showing the error on line 23 where I have: final RelativeLayout relativeLay = (RelativeLayout) findViewById(R.id.relativeLay);

I double-checked the code provided by the tutorial and what I have, Id, classes, methods etc...

update: I moved back several steps and tried to run the app without any color related code. It turns out that as soon as I put an ID on the RelaviteLayout the app crashes.