How to resize a Bitmap image in Android

Question

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:paddingLeft="32dp"
    android:paddingTop="10dp"
    android:paddingRight="0dp"
    android:paddingBottom="10dp">
    <item android:bottom="3dp">
        <bitmap
            android:gravity="center_vertical|left"
            android:src="@drawable/ic_publish_black_24dp" />
        <shape android:shape="rectangle">
            <stroke
                android:width="0dp"
                android:color="#37474f" />
        </shape>
    </item>
</layer-list>

This is how I call it:

TextView aboutBags = new TextView( mContext );
aboutBags.setText("Compose");
aboutBags.setTextAppearance( R.style.RevStyleHelpAbout );
aboutBags.setBackgroundResource( R.drawable.rev_item_h_border_left );

I've tried border attributes android:width="22dp" android:height="22dp" all over the XML, but the image doesn't get resized.

How can I resize the bitmap image?

Vielen dank im voraus.

Animesh Patra · Accepted Answer · 2017-07-15 08:10:17Z

7

Using Bitmap may help you. Use like this:

Bitmap nameYourBitmap;

Bitmap resized = Bitmap.createScaledBitmap(nameYourBitmap, newWidth, newHeight, true);

You can also do like this:

resized = Bitmap.createScaledBitmap(nameYourBitmap,(int)(nameYourBitmap.getWidth()*0.8), (int)(nameYourBitmap.getHeight()*0.8), true);

Refer to this: How to resize Image in Android?

For XML, the scale attributes are defined for ScaleDrawables, and they can scale another drawable. Please refer to this developer site: https://developer.android.com/guide/topics/resources/drawable-resource.html#Scale

edited Jul 15, 2017 at 8:10

answered Jul 15, 2017 at 8:01

Animesh Patra

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2 Comments

Program-Me-Rev Over a year ago

Thank you for the reply @Animesh Patra. Can I do it inside the XML.

Animesh Patra Over a year ago

@Program-Me-Rev You are welcome. If my answer was any help, you may accept it for future reference to others.

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