How do I create common code for parts of Android activities?

Question

In my application there are 14 activities. Out of that 9 activity contains custom title bar and tab pane. so here I need to write this common code at one place instead of redund

Answer 1

The common way is:

• Create a super class called, for instance, CommonActivity which extends Activity
• Put the boilerplate code inside that class
• Then make your activities extend CommonActivity instead of Activity:

Here a simple example:

public class CommonActivity extends Activity{
    public void onCreate(Bundle b){
        super.onCreate(b);
        // code that is repeated
    }

    protected void moreRepeatitiveCode(){
    }
}

And your current activities:

public class AnActivity extends CommonActivity{
    public void onCreate(Bundle b){
        super.onCreate(b);
        // specific code
    }
}