原理：

• 首先獲取根佈局的Fragment
• 利用canvas和paint繪製一個透明背景
• 使用CLEAR作為PorterDuffXfermode繪製需要高亮的地方
  然後在Fragment裡addview自己需要的圖片，例如箭頭，文字說明等
  
  
  
  程式碼：這是蒙版程式碼，裡面包括需要高亮的View

    class MyView extends View {
        private Paint mPaint;
        public MyView(Context context) {
            super(context);
            mPaint
 
=new Paint();
        }

         @Override

         protected void onDraw(Canvas canvas) {
             super.onDraw(canvas);
             //設定背景色
             //canvas.drawColor(Color.parseColor("#88000000"));
             int canvasWidth = getWidth();
             int canvasHeight = getHeight();
             canvas.saveLayer(
 
0, 0, canvasWidth, canvasHeight, null, Canvas.ALL_SAVE_FLAG);
             int r = canvasWidth / 3;
             //繪製透明背景蒙版
             mPaint.setColor(Color.parseColor("#88000000"));
             canvas.drawRect(0, 0,canvasWidth,canvasHeight, mPaint);
             //使用CLEAR作為PorterDuffXfermode繪製藍色的矩形（mPaint顏色隨意）
 

             mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
             mPaint.setColor(0xFF66AAFF);
             canvas.drawRect(getWidth() >> 1, r, r * 2.7f, r * 2.7f, mPaint);
             //最後將畫筆去除Xfermode
             mPaint.setXfermode(null);


         }

注意：紅色的程式碼是重點一定要寫，不然無效

然後在根佈局Fragment裡新增這個guideView和自己想要的View

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        View view = getWindow().getDecorView().findViewById(R.id.activity_main);

if (view == null) {
            return;
        }
        ViewParent viewParent = view.getParent();
        if (viewParent instanceof FrameLayout) {
            FrameLayout frameParent = (FrameLayout) viewParent;//獲取根佈局的fragment
            //載入想要的佈局
            View inflate = LayoutInflater.from(this).inflate(R.layout.itemone, null, false);
            MyView m=new MyView(this);
            m.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    frameParent.removeView(inflate);
                    frameParent.removeView(m);
                }
            });
            frameParent.addView(m);
            frameParent.addView(inflate);

        }
}

注意：這裡的根佈局的Fragment是DecorView下面的Fragment，每個Actvity頁面都有

測試效果：