Android MarqueeTextView

MarqueeTextView.java

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.TypedValue;

public class MarqueeTextView extends android.support.v7.widget.AppCompatTextView {
    private Paint paint = null;
    private float x = 0.0f;
    private float y = 0.0f;
    private float speed = 2.0f;

    public MarqueeTextView(Context context) {
        super(context);
        init();
    }

    public MarqueeTextView(Context context, AttributeSet attributeSet) {
        super(context, attributeSet);
        init();
    }

    public MarqueeTextView(Context context, AttributeSet attributeSet, int defStyle) {
        super(context, attributeSet, defStyle);
        init();
    }

    public void setSpeed(float speed) {
        this.speed = speed;
    }

    private void init() {
        paint = getPaint();
    }

    @Override
    public void onDraw(Canvas canvas) {
        String text = getText().toString();
        paint.setColor(getCurrentTextColor());
        setTextSize(TypedValue.COMPLEX_UNIT_PX, getHeight() - (getHeight() / 10));
        y = getTextSize() + getPaddingTop();
        canvas.drawText(text, getWidth() + paint.measureText(text) - x, y, paint);
        if (x == 0 || x > (getWidth() + (paint.measureText(text) * 2)))
            x = paint.measureText(text);
        else
            x += speed;
        invalidate();
    }
}