CompoundDrawable size

I finally released a library for it:

https://github.com/a-tolstykh/textview-rich-drawable

Use this library to set size of compound drawable.

Original answer

You can add custom attribute to your view to work with size of drawable. Of course, this solution requires additional code, but only once! After you can solve the problem using xml only (only once change the control and use it in all project).

See my example:

TextViewDrawableSize.java

public class TextViewDrawableSize extends TextView {

    private int mDrawableWidth;
    private int mDrawableHeight;

    public TextViewDrawableSize(Context context) {
        super(context);
        init(context, null, 0, 0);
    }

    public TextViewDrawableSize(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs, 0, 0);
    }

    public TextViewDrawableSize(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs, defStyleAttr, 0);
    }

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

    private void init(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.TextViewDrawableSize, defStyleAttr, defStyleRes);

        try {
            mDrawableWidth = array.getDimensionPixelSize(R.styleable.TextViewDrawableSize_compoundDrawableWidth, -1);
            mDrawableHeight = array.getDimensionPixelSize(R.styleable.TextViewDrawableSize_compoundDrawableHeight, -1);
        } finally {
            array.recycle();
        }

        if (mDrawableWidth > 0 || mDrawableHeight > 0) {
            initCompoundDrawableSize();
        }
    }

    private void initCompoundDrawableSize() {
        Drawable[] drawables = getCompoundDrawables();
        for (Drawable drawable : drawables) {
            if (drawable == null) {
                continue;
            }

            Rect realBounds = drawable.getBounds();
            float scaleFactor = realBounds.height() / (float) realBounds.width();

            float drawableWidth = realBounds.width();
            float drawableHeight = realBounds.height();

            if (mDrawableWidth > 0) {
                // save scale factor of image
                if (drawableWidth > mDrawableWidth) {
                    drawableWidth = mDrawableWidth;
                    drawableHeight = drawableWidth * scaleFactor;
                }
            }
            if (mDrawableHeight > 0) {
                // save scale factor of image

                if (drawableHeight > mDrawableHeight) {
                    drawableHeight = mDrawableHeight;
                    drawableWidth = drawableHeight / scaleFactor;
                }
            }

            realBounds.right = realBounds.left + Math.round(drawableWidth);
            realBounds.bottom = realBounds.top + Math.round(drawableHeight);

            drawable.setBounds(realBounds);
        }
        setCompoundDrawables(drawables[0], drawables[1], drawables[2], drawables[3]);
    }
}

attrs.xml

<resources>
    <declare-styleable name="TextViewDrawableSize">
        <attr name="compoundDrawableWidth" format="dimension"/>
        <attr name="compoundDrawableHeight" format="dimension"/>
    </declare-styleable>
</resources>

And usage

    <com.alt.view.TextViewDrawableSize
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/logo"
        android:drawableStart="@drawable/logo"
        android:drawablePadding="@dimen/space_micro"
        app:compoundDrawableHeight="@dimen/small_logo_height"
        app:compoundDrawableWidth="@dimen/small_logo_width"
        />

There is a solution but its not 100% satisfying since you cannot control the size directly only the relative padding with inset:

background.xml

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
       android:insetBottom="4dp"
       android:insetTop="4dp"
       android:insetLeft="4dp"
       android:insetRight="4dp">
    <bitmap android:src="@drawable/your_icon"/>
</inset>

layout.xml

<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Your text"
        android:drawableLeft="@drawable/background"
        android:drawablePadding="8dp"
        />

Another solution would ScaleDrawables, but I guess this wont work great over different pixel densities.

If you scale the images in code as Drawable objects, you can then set them in code using the setCompoundDrawables() method of TextView. This will require having called setBounds() on the Drawables.

As far as I know there is no way to set the size in XML.