java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.loginpanel2/com.example.loginpanel2.MainActivity}:

Issue

When I run my application, I get an "Application Stopped" error.

Solution

Your crash is caused by the theme of activity. If you are using AppCompatActivity You need to set...

android:theme="@style/Theme.YourTheme"

to your manifest(application or activity).

If your activity extends Activity, No need to add it to your manifest, and the crash will not happen.

Answered By - Yousef Kazemi