always display 3 buttons in a HorizontalScrollView

Question

Hello everyone I am trying to display 3 to X buttons on android. The idea is to always

Answer 1

If you are setting the size dynamically and there are unknown number of child views, then weight approach isn't that feasible. Instead get the width of the screen, and based on that set the width of the button. Also, LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 0.33f)); this line in your code will not work as you expected. You need to set the params to button to make it work.

You can try something like this,

HomeCircledButton button = HomeCircledButton_.build(this);
button.title.setText(sc.get(i).getLabel());
//divide the screen width by 3
int buttonWidth = getScreenWidth() / 3;
LinearLayout.LayoutParams buttonparams= new LinearLayout.LayoutParams(buttonWidth, LinearLayout.LayoutParams.MATCH_PARENT);
button.setLayoutParams(buttonparams);
homeButtonsLL.addView(button);

...

private int getScreenWidth( ) {
        DisplayMetrics displayMetrics = new DisplayMetrics();
        int width;
        getWindowManager().getDefaultDisplay()
        .getMetrics(displayMetrics);
        width = displayMetrics.widthPixels;
        return width;
    }

and you don't have to set weight sum in xml,

<HorizontalScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:orientation="horizontal"
                android:gravity="center"
                android:id="@+id/home_buttons_ll">
           </LinearLayout>
  </HorizontalScrollView>