How to use setContentView(layout_id) second time in main_activity of android code?

Question

My activity_main.xml has 2 buttons. I have implemented onClickListner(); for both of them .

For MainActivity, - > setContentView(R.layout.activity_main) This activity_main has the 2 buttons.

Button1 - setContentView(R.layout.layout1); Button2 - setContentView (R.layout.layout2);

Is this the proper way to use?? Because..

The program runs fine. The problem is that when I click Button2, the layout2 loads, I want to come back to main_activity now, So I press 'Back' button. The entire app closes..!! I am taken to homescreen of the phone.

How to get around this?? I say ViewSwitcher. I do not have a button to come back.

Any other way?? Please excuse for basic question and bad English.

score 1 · Answer 1 · edited Jan 19 '15 at 18:26

1

U have to override onBackPressed() function in your activity and again u have to setContentView to activity_main.xml and remove the super.onBackPressed from onBackPressed.

Something like this:

@Override
public void onBackPressed() {
    //validation if you are in second layout
    if(layout2){
       //do things
        showLayout1();
    }else{
       super.onBackPressed();
    }
}

edited Jan 19 '15 at 18:26

rafaelasguerra

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answered Jan 19 '15 at 18:00

Rider

463
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Thank you... How do I write if(layout2) ?? How to see if current view is set to layout2? – Android_Noob Jan 20 '15 at 06:59

score 0 · Accepted Answer · answered Jan 19 '15 at 18:07

You should pretty much never call setContentView() more than once. What you're describing is standard backstack behavior. Either start a new Activity whatever layout you're transitioning to, or switch to using Fragments, and add a new Fragment to the backstack instead of calling setContentView().

Both approaches will give you native behavioral support for the back button.

How to use setContentView(layout_id) second time in main_activity of android code?

2 Answers2