How can I shrink the drawable on a button?

Question

how can I make the drawable on a button smaller? The icon is too big, actually higher than the button. This is the code I am using:

    <Button
    android:background="@drawable/red_button"
    android:drawableLeft="@drawable/s_vit"
    android:id="@+id/ButtonTest"
    android:gravity="left|center_vertical" 
    android:text="S-SERIES CALCULATOR"
    android:textColor="@android:color/white"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_marginLeft="25dp"
    android:layout_marginRight="25dp"
    android:drawablePadding="10dp">
    </Button>

The upper is how it should look, the lower how it looks right now.

I tried this but there is no image displayed. :-(

    Resources res = getResources();
    ScaleDrawable sd = new ScaleDrawable(res.getDrawable(R.drawable.s_vit), 0, 10f, 10f);
    Button btn = (Button) findViewById(R.id.ButtonTest);
    btn.setCompoundDrawables(sd.getDrawable(), null, null, null);

Answer 1

• Using "BATCH DRAWABLE IMPORT" feature you can import custom size depending upon your requirement example 20dp*20dp

  • Now after importing use the imported drawable_image as drawable_source for your button

  • It's simpler this way

Answer 2

I made a custom button class to achieve this.

CustomButton.java

public class CustomButton extends android.support.v7.widget.AppCompatButton {

    private Drawable mDrawable;

    public CustomButton(Context context, AttributeSet attrs) {
        super(context, attrs);

        TypedArray a = context.getTheme().obtainStyledAttributes(
                attrs,
                R.styleable.CustomButton,
                0, 0);

        try {
            float mWidth = a.getDimension(R.styleable.CustomButton_drawable_width, 0);
            float mHeight = a.getDimension(R.styleable.CustomButton_drawable_width, 0);

            Drawable[] drawables = this.getCompoundDrawables();
            Drawable[] resizedDrawable = new Drawable[4];

            for (int i = 0; i < drawables.length; i++) {
                if (drawables[i] != null) {
                    mDrawable = drawables[i];
                }
                resizedDrawable[i] = getResizedDrawable(drawables[i], mWidth, mHeight);
            }

            this.setCompoundDrawables(resizedDrawable[0], resizedDrawable[1], resizedDrawable[2], resizedDrawable[3]);
        } finally {
            a.recycle();
        }
    }

    public Drawable getmDrawable() {
        return mDrawable;
    }

    private Drawable getResizedDrawable(Drawable drawable, float mWidth, float mHeight) {
        if (drawable == null) {
            return null;
        }

        try {
            Bitmap bitmap;

            bitmap = Bitmap.createBitmap((int)mWidth, (int)mHeight, Bitmap.Config.ARGB_8888);

            Canvas canvas = new Canvas(bitmap);
            drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
            drawable.draw(canvas);
            return drawable;
        } catch (OutOfMemoryError e) {
            // Handle the error
            return null;
        }
    }
}

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="CustomButton">
        <attr name="drawable_width" format="dimension" />
        <attr name="drawable_height" format="dimension" />
    </declare-styleable>
</resources>

Usage in xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.MainActivity">

     <com.example.CustomButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:drawableTop="@drawable/ic_hero"
            android:text="Avenger"
            custom:drawable_height="10dp"
            custom:drawable_width="10dp" />

</RelativeLayout>