Android自定义手绘板 签字板

/**
 * 作者：guoyzh
 * 时间：2019/4/12 16:06
 * 功能：手写画笔
 */
public class CustomerPainterView extends View {

    private Paint mPaint;
    private Path mPath;
    private float mLastX;
    private float mLastY;
    private Canvas canvas;

    public CustomerPainterView(Context context) {
        this(context, (AttributeSet) null);
    }

    public CustomerPainterView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomerPainterView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.initView();
    }

    private void initView() {
        this.mPath = new Path();
        this.mPaint = new Paint();
        this.mPaint.setStyle(Paint.Style.STROKE);
        this.mPaint.setColor(Color.parseColor("#303F9F"));
        this.mPaint.setStrokeWidth(5.0F);
        this.mPaint.setAntiAlias(true);
        // getParent().requestDisallowInterceptTouchEvent(false);
    }

    public boolean onTouchEvent(MotionEvent event) {
        float x = event.getX();
        float y = event.getY();
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                this.mPath.moveTo(x, y);
                this.mLastX = x;
                this.mLastY = y;
                return true;
            case MotionEvent.ACTION_MOVE:
                float endX = (this.mLastX + x) / 2.0F;
                float endY = (this.mLastY + y) / 2.0F;
                this.mPath.quadTo(this.mLastX, this.mLastY, endX, endY);
                this.mLastX = x;
                this.mLastY = y;
                this.invalidate();
            case MotionEvent.ACTION_UP:
            default:
                return super.onTouchEvent(event);
        }
    }

    protected void onDraw(Canvas canvas) {
        this.canvas = canvas;
        canvas.drawPath(this.mPath, this.mPaint);
    }

    public void setPenColorRes(@ColorRes int penColorId) {
        int color = this.getResources().getColor(penColorId);
        this.mPaint.setColor(color);
    }

    public void setPenColor(@ColorInt int penColor) {
        this.mPaint.setColor(penColor);
    }

    public void setPenWidth(float penWidth) {
        this.mPaint.setStrokeWidth(penWidth);
    }

    public void clear() {
        this.mPath.reset();
        this.invalidate();
    }

    public Bitmap createBitmap() {
        return BitmapUtil.convertViewToBitmap(this, this.getWidth(), this.getHeight());
    }

    /**
     * 清空当前已绘制内容
     */
    public void clearDrawable() {
        clear();
    }
}