TilingDrawable

TilingDrawable.java

public class TilingDrawable extends android.support.v7.graphics.drawable.DrawableWrapper {

    private boolean callbackEnabled = true;

    public TilingDrawable(Drawable drawable) {
        super(drawable);
    }

    @Override
    public void draw(Canvas canvas) {
        callbackEnabled = false;
        Rect bounds = getBounds();
        Drawable wrappedDrawable = getWrappedDrawable();

        int width = wrappedDrawable.getIntrinsicWidth();
        int height = wrappedDrawable.getIntrinsicHeight();
        for (int x = bounds.left; x < bounds.right + width - 1; x+= width) {
            for (int y = bounds.top; y < bounds.bottom + height - 1; y += height) {
                wrappedDrawable.setBounds(x, y, x + width, y + height);
                wrappedDrawable.draw(canvas);
            }
        }
        callbackEnabled = true;
    }

    @Override
    protected void onBoundsChange(Rect bounds) {
    }

    /**
     * {@inheritDoc}
     */
    public void invalidateDrawable(Drawable who) {
        if (callbackEnabled) {
            super.invalidateDrawable(who);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void scheduleDrawable(Drawable who, Runnable what, long when) {
        if (callbackEnabled) {
            super.scheduleDrawable(who, what, when);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void unscheduleDrawable(Drawable who, Runnable what) {
        if (callbackEnabled) {
            super.unscheduleDrawable(who, what);
        }
    }
}

Thank you for sharing, that's very useful!
I've also added

    @Override
    public int getMinimumWidth() {
        return 0;
    }
    @Override
    public int getMinimumHeight() {
        return 0;
    }

, so wrapped drawable's size won't affect view's size.

I'm having an issue, the super() in the constructor warns

DrawableWrapper can only be called from within the same library group (groupId=com.android.support)

Similarly the getWrappedDrawable() in the draw(Canvas canvas) states

DrawableWrapper.getWappedDrawable can only be called from within the same library group (groupId=com.android.support)

Tried my Google-Fu, but very little results are online. Any help you can offer?

It seems an @RestrictTo annotation was added to the class in the support library, so I think the only solution would be to copy the entire source of DrawableWrapper and subclass that.

Could you write a constructor for this class for tiling layout, simple "get started"?

Is it a correct example of use? At least, it work… :)
Drawable drawable = ContextCompat.getDrawable(this, R.drawable.my_drawable_resource); TilingDrawable tDraw = new TilingDrawable(drawable); tDraw.draw(new Canvas()); mRelativeLayout.setBackground(tDraw);

@antaki93 You can use this way on Kotlin:

    yourView.background = TilingDrawable(AppCompatResources.getDrawable(this, R.drawable.your_drawable))

BTW, here's the original code of the TilingDrawable, in Kotlin:

open class DrawableWrapper(drawable: Drawable) : Drawable(), Drawable.Callback {
    var wrappedDrawable: Drawable? = drawable
        set(drawable) {
            field?.callback = null
            field = drawable
            drawable?.callback = this
        }

    override fun draw(canvas: Canvas) = wrappedDrawable!!.draw(canvas)

    override fun onBoundsChange(bounds: Rect) {
        wrappedDrawable!!.bounds = bounds
    }

    override fun setChangingConfigurations(configs: Int) {
        wrappedDrawable!!.changingConfigurations = configs
    }

    override fun getChangingConfigurations() = wrappedDrawable!!.changingConfigurations

    override fun setDither(dither: Boolean) = wrappedDrawable!!.setDither(dither)

    override fun setFilterBitmap(filter: Boolean) {
        wrappedDrawable!!.isFilterBitmap = filter
    }

    override fun setAlpha(alpha: Int) {
        wrappedDrawable!!.alpha = alpha
    }

    override fun setColorFilter(cf: ColorFilter?) {
        wrappedDrawable!!.colorFilter = cf
    }

    override fun isStateful() = wrappedDrawable!!.isStateful

    override fun setState(stateSet: IntArray) = wrappedDrawable!!.setState(stateSet)

    override fun getState() = wrappedDrawable!!.state


    override fun jumpToCurrentState() = DrawableCompat.jumpToCurrentState(wrappedDrawable!!)

    override fun getCurrent() = wrappedDrawable!!.current

    override fun setVisible(visible: Boolean, restart: Boolean) = super.setVisible(visible, restart) || wrappedDrawable!!.setVisible(visible, restart)

    override fun getOpacity() = wrappedDrawable!!.opacity

    override fun getTransparentRegion() = wrappedDrawable!!.transparentRegion

    override fun getIntrinsicWidth() = wrappedDrawable!!.intrinsicWidth

    override fun getIntrinsicHeight() = wrappedDrawable!!.intrinsicHeight

    override fun getMinimumWidth() = wrappedDrawable!!.minimumWidth

    override fun getMinimumHeight() = wrappedDrawable!!.minimumHeight

    override fun getPadding(padding: Rect) = wrappedDrawable!!.getPadding(padding)

    override fun invalidateDrawable(who: Drawable) = invalidateSelf()

    override fun scheduleDrawable(who: Drawable, what: Runnable, `when`: Long) = scheduleSelf(what, `when`)

    override fun unscheduleDrawable(who: Drawable, what: Runnable) = unscheduleSelf(what)

    override fun onLevelChange(level: Int) = wrappedDrawable!!.setLevel(level)

    override fun setAutoMirrored(mirrored: Boolean) = DrawableCompat.setAutoMirrored(wrappedDrawable!!, mirrored)

    override fun isAutoMirrored() = DrawableCompat.isAutoMirrored(wrappedDrawable!!)

    override fun setTint(tint: Int) = DrawableCompat.setTint(wrappedDrawable!!, tint)

    override fun setTintList(tint: ColorStateList?) = DrawableCompat.setTintList(wrappedDrawable!!, tint)

    override fun setTintMode(tintMode: PorterDuff.Mode) = DrawableCompat.setTintMode(wrappedDrawable!!, tintMode)

    override fun setHotspot(x: Float, y: Float) = DrawableCompat.setHotspot(wrappedDrawable!!, x, y)

    override fun setHotspotBounds(left: Int, top: Int, right: Int, bottom: Int) = DrawableCompat.setHotspotBounds(wrappedDrawable!!, left, top, right, bottom)
}