In my android project, I have many activities and some of them already extend other stuff like map activity or BroadcastReceiver.
How do I create a function that I can call from any activity, because I don't want to have to repeat any code in multiple activities.
thanks.
Create a new Java class BaseActivity with abstract Modifiers and extends it with AppCompatActivity.
Move all your methods under Java class BaseActivity.
package com.example.madbox;
public abstract class BaseActivity extends AppCompatActivity {
protected void YourClass() {
}
}