How can i add another button intent beside previous one?

Question

Here is my code: it contains a button named as button1A and when I click on it, It opens a list named as list1. How can I put a code for my a

Answer 1

Change your addListenerOnButton method using switch-case to minimize code and add single OnClickListener listener to multiple button as :

    public void addListenerOnButton() {

        button1A = (Button) findViewById(R.id.button1A);
        button1A.setOnClickListener(clicklistener);
        // add OnClickListener to second Button 
        button1B = (Button) findViewById(R.id.button1B);
        button1B.setOnClickListener(clicklistener);
    OnClickListener clicklistener = new View.OnClickListener() {
     @Override
      public void onClick(View v) {
        switch(v.getId()){

          case R.id.button1A: 
                    // start second List Activity
               Intent a1 = new Intent(v.getContext(), List1.class);
               startActivity(a1);
               break;

          case R.id.button2A: 
                     // start second List Activity
               Intent a2 = new Intent(v.getContext(), List2.class);
               startActivity(a2);
               break;

        }
       }
     };
   }