Triangle Shape View with drawable

attrs.xlm

   <declare-styleable name="TriangleShapeView">
        <attr name="img" format="reference"  />
        <attr name="imgPadding" format="dimension"  />
        <attr name="triangleBackground" format="color"  />
    </declare-styleable>

TriangleShapeView.java

public class TriangleShapeView extends View {
        Paint paint;
        Path trianglePath;
        Drawable drawable;
        int imgPadding;
        int backgroundColor;

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

        public TriangleShapeView(Context context, AttributeSet attrs) {
            this(context, attrs, 0);
        }

        public TriangleShapeView(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);

            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TriangleShapeView);
            drawable = a.getDrawable(R.styleable.TriangleShapeView_img);
            imgPadding = a.getDimensionPixelSize(R.styleable.TriangleShapeView_imgPadding, 5);
            backgroundColor = a.getColor(R.styleable.TriangleShapeView_triangleBackground, Color.TRANSPARENT);
            a.recycle();

            trianglePath = new Path();
            paint = new Paint();
            paint.setColor(backgroundColor);
        }

    public void setBackgroundColor(int backgroundColor) {
        this.backgroundColor = backgroundColor;
        invalidate();
    }

    public void setDrawable(Drawable drawable) {
        this.drawable = drawable;
        invalidate();
    }

    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        int size = Math.max(getWidth(), getHeight()) / 2 + imgPadding;
        trianglePath.lineTo(size, 0);
        trianglePath.lineTo(0, size);
        trianglePath.lineTo(0, 0);
        trianglePath.close();

        canvas.drawPath(trianglePath, paint);
        drawable.draw(canvas);
        paint.setColor(backgroundColor);
    }

    @Override
    protected boolean verifyDrawable(Drawable who) {
        return super.verifyDrawable(who) || who == drawable;
    }

    @Override
    public void jumpDrawablesToCurrentState() {
        super.jumpDrawablesToCurrentState();
        if (drawable != null) drawable.jumpToCurrentState();
    }

    @Override
    protected void drawableStateChanged() {
        super.drawableStateChanged();
        if (drawable != null && drawable.isStateful()) {
            drawable.setState(getDrawableState());
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        if (drawable != null) {
            drawable.setBounds(imgPadding, imgPadding, drawable.getIntrinsicWidth() + imgPadding, drawable.getIntrinsicHeight() + imgPadding);
            invalidate();
        }
    }
}