How to stretch three images across the screen preserving aspect ratio?

Got it working! But as I said above, you need to create your own class. But it is pretty small. I created it with the help of this Bob Lee's answer in this post: Android: How to stretch an image to the screen width while maintaining aspect ratio?

package com.yourpackage.widgets;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;

public class AspectRatioImageView extends ImageView {

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

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

    public AspectRatioImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = width * getDrawable().getIntrinsicHeight() / getDrawable().getIntrinsicWidth();
        setMeasuredDimension(width, height);
    }
}

Now to use it in the XML:

<com.yourpackage.widgets.AspectRatioImageView 
    android:id="@+id/image"
    android:src="@drawable/yourdrawable" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true" 
    android:layout_centerHorizontal="true" 
    android:adjustViewBounds="true" />

Have fun!

=====================================

Found another way to do the same only in XML by using android:adjustViewBounds="true". Here an example:

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <ImageView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:src="@drawable/image1" />

    <ImageView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:src="@drawable/image2" />


    <ImageView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:src="@drawable/image2" />

</LinearLayout>

Only a minor upgrade to take into account what could possible go wrong: null Drawable or 0 width.

package com.yourpackage.yourapp;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class AspectRatioImageView extends ImageView {

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

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

public AspectRatioImageView(Context context, AttributeSet attrs,
        int defStyle)
{
    super(context, attrs, defStyle);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
    Drawable drawable = getDrawable();
    if (drawable != null)
    {
        int width =  MeasureSpec.getSize(widthMeasureSpec);
        int diw = drawable.getIntrinsicWidth();
        if (diw > 0)
        {
            int height = width * drawable.getIntrinsicHeight() / diw;
            setMeasuredDimension(width, height);
        }
        else
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
    else
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}

Jake Wharton improves AspectRatioImageView class, you can set dominantMeasurement and aspectRatio via xml. You can find it in the link below.

https://gist.github.com/JakeWharton/2856179

How to stretch three images across the screen preserving aspect ratio?

Related

Recent Posts