Take screen size in xml

Question

I would like Layout to have the size of the screen horizontal. But when the screen turned, it would still be the same size. I’ve made a little sketch of how I intend it to look:

The current xml is only :

<LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:padding="16dp"></LinearLayout>

Edited

I ended up using even the code in the create da acivity:

DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);
    int minimo=Math.min(dm.widthPixels,dm.heightPixels);
View layoutAlto = findViewById(R.id.login_layoutalto);
    layoutAlto.getLayoutParams().width = minimo;

Thanks for the help

Answer 1

I’m not going to give you a ready-made solution because it would be a bit extensive, and I can’t find a solution for the case where the application is initially executed in landscape mode.

To obtain the width and height of a view which have these values stated in xml as match_parent or wrap_content use this code:

private final int largura;
private final int altura;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ....
    ....
    final View aSuaView = findViewById(R.id.aSuaView);
    aSuaView.getViewTreeObserver().addOnGlobalLayoutListener(new 

        ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                //Remove o listenner para não ser novamente chamado.
                aSuaView.getViewTreeObserver().removeOnGlobalLayoutListener(this);

                //Coloca a largura igual à altura
                largura = aSuaView.getWidth();
                altura = aSuaView.getHeight();
            }
        });
}

To know if the device is in landscape mode use:

getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE

You must keep the value of the width that the view has in portrait mode and when to pass the landscape mode assigns it to her.

To save the value you can use the savedInstanceState.

Answer 2

The only way to do this is to change the width at runtime. Since xml does not support mathematical operations. In onCreate :

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int minimo=Math.min(dm.widthPixels,dm.heightPixels);
View layoutView = findViewById(R.id.iddolayout);
layoutView .getLayoutParams().width = minimo;

Using the min operation because it is smaller dimension that will be the width of the layout.

Answer 3

All you want to do is use layout_weight. Follow the example:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#123">
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#678">
    </LinearLayout>       

</LinearLayout>