PercentRelativeLayout inside ScrollView

Question

I have created a layout using a ScrollView which has a PercentRelativeLayout as its child. It doesn't work on Lollipop and older devices but works fine on Marshmallow devices. Please check the code below:

<ScrollView
    android:id="@+id/scrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <android.support.percent.PercentRelativeLayout
        android:id="@+id/scrollContent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_heightPercent="100%"
        app:layout_widthPercent="50%">

        <TextView
            android:id="@+id/textView1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/holo_red_dark"
            android:text="kkjknadko"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textView1"
            android:text="Abcaad"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview2"
            android:background="@android:color/holo_red_dark"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview3"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview4"
            android:background="@android:color/holo_red_dark"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview6"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview5"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview7"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview6"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

        <TextView
            android:id="@+id/textview8"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/textview7"
            android:text="Abcd"
            android:textColor="@android:color/black"
            app:layout_heightPercent="10%"
            app:layout_marginTopPercent="10%"
            app:layout_widthPercent="50%"/>

    </android.support.percent.PercentRelativeLayout>
</ScrollView>

And also I android:fillViewport="true", it doesn't show anything in Lollipop and older Android versions.

Unfortunately, the percent layout won't work with ScrollView before M. The reason for that is that they depend on the size hint being delivered in the measuring step. Before M most layouts would provide size hint 0 when sending unspecified measure spec.

You can try to fix that by creating your own subclass of ScrollView and overriding measureChild and measureChildWithMargins (fortunately both are protected) to provide the size hint.

source - plus.google.com.

Can someone help me with creating custom ScrollView to make it work?

Answer 1

Create one custom scrollview and set Measured Height and Width as you want to it for Example

CustomScrollView

public class CustomScrollView extends ScrollView {


    public CustomScrollView(Context context) {
        super(context);
    }

    public CustomScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public CustomScrollView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int size = 0;
        int width = getMeasuredWidth();
        int height = getMeasuredHeight();

        if (width > height) {
            size = height;
        } else {
            size = width;
        }
        setMeasuredDimension(size, size);
    }
}

Use customscrollview in your xml.

    <yourscrollviewclasspath.CustomScrollView           // here you have scrollview path like com.yourpackage.folder_where_your_scrollview_lies
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        >
</yourscrollviewclasspath.CustomScrollView >

hope this will help.