How to show/hide grouped views in Android?

Question

I want to create an activity such as mentioned in photo... as soon as I press the maximize button I want it to become full screen for the activity and part 1 become minimize, an

Answer 1

There is a bit simplified solution, than Diego Palomar produced, without using additional variable. I'll take his code to show:

    public class MyActivity extends Activity implements OnClickListener { 

    private View mViewGroup;
    private Button mButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mViewGroup = findViewById(R.id.viewsContainer);

        mButton = findViewById(R.id.button);
        mButton.setOnClickListener(this);
    }


    @Override
    public void onClick(View button) {

    if (mViewGroup.getVisibility() == View.VISIBLE) {
        mViewGroup.setVisibility(View.GONE);
        mButton.setText("Show");
    } else {
        mViewGroup.setVisibility(View.VISIBLE);
        mButton.setText("Hide");
    }

}