Android:在画布中添加onclick文本？

public class CustomTextView extends View {
    private Paint mPaint;
    private Rect mTextBounds;
    private String mText;
    private OnClickListener mClickListener;

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

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

    private void init() {
        mPaint = new Paint();
        mPaint.setTextSize(40);
        mPaint.setColor(Color.BLACK);
        mTextBounds = new Rect();
        mText = "Click me";
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPaint.getTextBounds(mText, 0, mText.length(), mTextBounds);
        int x = getWidth() / 2 - mTextBounds.width() / 2;
        int y = getHeight() / 2 + mTextBounds.height() / 2;
        canvas.drawText(mText, x, y, mPaint);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            if (mTextBounds.contains(x, y)) {
                if (mClickListener != null) {
                    mClickListener.onClick(this);
                }
                return true;
            }
        }
        return super.onTouchEvent(event);
    }

    public void setOnClickListener(OnClickListener listener) {
        mClickListener = listener;
    }

    public interface OnClickListener {
        void onClick(View view);
    }
}

CustomTextView customTextView = new CustomTextView(this);
customTextView.setOnClickListener(new CustomTextView.OnClickListener() {
    @Override
    public void onClick(View view) {
        // 处理点击事件
    }
});