android引导遮罩

第一步：类的复制HighLightLayoutFang

public class HighLightLayoutFang extends RelativeLayout {
    public HighLightLayoutFang(Context context) {
        super(context);
        init();
    }

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

    public HighLightLayoutFang(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public void addRes(int res) {
        View view = View.inflate(getContext(), res, null);
        addView(view);
    }

    public void init() {
        setBackgroundColor(Color.TRANSPARENT);
    }

    ArrayList<Path> paths = new ArrayList<>();
    int size = 0;

    public void setView(View... views) {
        size = views.length;
        for (final View view : views) {
            view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {

                        Path path = new Path();
                    int[] position = new int[2];
                    view.getLocationInWindow(position);
                    float x = position[0] + view.getWidth() / 2f;
                    float y = position[1] + view.getHeight() / 2f;
                    float r;
                    if (view.getWidth() > view.getHeight()) {
                        r = view.getWidth() / 2f;
                    } else {
                        r = view.getHeight() / 2f;
                    }
                    path.addCircle(x, y, r, Path.Direction.CW);
                    //根据需求更改：圆形、正方形、圆角正方形、都是根据x轴Y轴来计算的
                              //这个是矩形的
              //  path.addRect(position[0], position[1], position[0]+ view.getWidth(),position[1]+view.getHeight(), Path.Direction.CW);
                //下面是圆角正方形
                path.addRoundRect(new RectF(position[0], position[1], position[0]+ view.getWidth(),position[1]+view.getHeight()), radiusArray, Path.Direction.CW);
                    paths.add(path);
                    if (paths.size() >= size) {
                        invalidate();
                    }
                    view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                }
            });
        }
    }

    Paint paint = new Paint();

    @SuppressLint("NewApi")
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.save();
        int layerId = canvas.saveLayer(0, 0, canvas.getWidth(), canvas.getHeight(), null, Canvas.ALL_SAVE_FLAG);
        paint.setColor(Color.parseColor("#b2000000"));
        canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), paint);
        paint.setColor(Color.parseColor("#ff000000"));
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
        for (Path path : paths) {
            canvas.drawPath(path, paint);

        }

        //canvas.drawRect(new Rect(0,0,100,100), paint);
        paint.setXfermode(null);
        canvas.restoreToCount(layerId);
        canvas.restore();
    }
}

第二步：//判断是否第一次登陆 如果是第一次登陆就有功能引导页面否则没有create_new() 写在进页面的地方

public void create_new() {
        addImg();
        boolean theFirst = SPUtils.getSp(this).getBoolean(TAG, true);
        if (theFirst) {
            SPUtils.getEditor(this).putBoolean(TAG, false).commit();
        } else {

        }
    }

第三步：//新功能引导页 的做法 添加需要遮罩的Id 和显示的View

 public void addImg() {
        boolean theFirst = SPUtils.getSp(getActivity()).getBoolean(SPTAG, true);
        if (theFirst) {
            //第一次启动
            HighLightLayoutFang view = new HighLightLayoutFang(getActivity());
            view.addRes(R.layout.view_guide_simple);
            view.setView(rootView.findViewById(R.id.sjgz), rootView.findViewById(R.id.wdjz), rootView.findViewById(R.id.kf), rootView.findViewById(R.id.jsq));
            ((ViewGroup) getActivity().getWindow().getDecorView()).addView(view);
            view.invalidate();
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    ((ViewGroup) getActivity().getWindow().getDecorView()).removeView(view);
                }
            });
            SPUtils.getEditor(getActivity()).putBoolean(SPTAG, false).commit();
        }


    }