Layout issues on different screens

Question

I developed and tested my application the whole time on my 5.2 inch device (LG G2).

Only just I started the application on a bigger 5.5 inch device (OnePlus 3T) and it looks not good as you can see below:

This is the main Activity:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:app="http://schemas.android.com/apk/res-auto"
          android:id="@+id/layout_main_menu"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:background="#b2b2b2"
          android:orientation="vertical">

<!-- android:layout_height="wrap_content" -->
<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    android:fitsSystemWindows="true"
    android:minHeight="?attr/actionBarSize"
    android:padding="2dp"
    app:titleMarginStart="20dp"
    app:titleTextAppearance="@style/MyMaterialTheme.Base.TitleTextStyle"
    app:titleTextColor="@color/textColorPrimary">

    <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textColor="@android:color/white"
        android:textStyle="bold|italic"/>

</android.support.v7.widget.Toolbar>


<!--android:columnWidth="160dp"-->
<GridView
    android:id="@+id/grid_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:gravity="center"
    android:horizontalSpacing="20dp"
    android:numColumns="2"
    android:stretchMode="columnWidth"
    android:verticalSpacing="20dp"></GridView>

</LinearLayout>

And this is the layout xml for the sub items:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/item"
android:layout_width="300dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal"
android:background="#FFFFFFFF"
android:gravity="center_horizontal"
android:orientation="horizontal"
tools:context="de.dk.masterfitness.ActMain" >

<!-- PART I. -->
<!-- THIS IS THE BAR ON THE LEFT -->

<TextView
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_weight="2"
    android:background="@android:color/holo_green_light" />

<!-- PART II. -->
<!-- THIS IS THE MIDDLE WITH TEXTS AND LINE -->

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_weight="6"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        android:layout_weight="2"
        android:background="#FFFFFFFF"
        android:orientation="horizontal" >

        <!-- ViewGroup with texts -->

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="10dp"
            android:layout_marginTop="5dp"
            android:layout_weight="2"
            android:background="#FFFFFFFF"
            android:orientation="vertical" >

            <!-- First is fitted with triangle -->

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal" >

                <ImageView
                    android:id="@+id/iv_training"
                    android:layout_width="20dp"
                    android:layout_height="20dp"
                    android:rotation="90.0"
                    android:src="@drawable/triangle" />

                <TextView
                    android:id="@+id/tv_header"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:textColor="@android:color/black"
                    android:textStyle="bold" />
            </LinearLayout>

            <TextView
                android:id="@+id/tv_text"
                android:layout_width="200dp"
                android:layout_height="70dp"
                android:paddingLeft="20dp"
               android:textAppearance="?android:attr/textAppearanceSmall" />
        </LinearLayout>

        <!-- nothing more than single vertical line -->

        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="#F1999999" >
        </View>
    </LinearLayout>
</LinearLayout>

<!-- PART III. -->
<!-- BUTTON ON THE RIGHT -->

<TextView
    android:layout_width="10dp"
    android:layout_height="match_parent"
    android:layout_weight="6"
    android:gravity="center"
    android:text=">"
    android:textAlignment="gravity"
    android:textColor="@android:color/holo_green_light"
    android:textSize="40dp"
    android:textStyle="bold" />
</LinearLayout>

What I'm doing wrong here?

EDIT:

I searched a little bit and found a solution to set the minimum height of the GridView dynamically with following code:

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);

int width = metrics.widthPixels;
int height = metrics.heightPixels;

In addition I added these lines of code to my Adapter:

gridView = inflater.inflate(R.layout.act_main_menu_sub, null);
gridView.setMinimumHeight(ActMainMenu.height/2);

In my case I have to divide the screen height through 2 because there are 2 rows. If I do this the result looks like this:

The View becomes scrollable now and the items have the same size. But it doesn't fit on the screen.

If I divide the height through 3 it looks better on my 5.5 device:

But I don't like this solution and I don't understand why it looks better if I choose 3 instead of 2.

Answer 1

You can use PercentageRelativeLayout for better result.

Here is some Referral Link of it, Hope it helps you

https://developer.android.com/reference/android/support/percent/PercentRelativeLayout.html

https://inthecheesefactory.com/blog/know-percent-support-library/en