Setmargins does not work

Problem description
When you use viewpage for advertising and scrolling, a dot is generated for each photo based on the number of photos. The current photo is rolling, but the height and width of the dot are set to normal with the layoutparams object, setting the dot spacing with setmargins is invalid.

private void initUI(Context context) {LayoutInflater.from(context).inflate(R.layout.layout_slideshow, this,true);mLyTest= (ViewGroup) findViewById(R.id.ly_test);int num = 0;for (int imageID : this.getImagesResIds()) {ImageView view = new ImageView(context);view.setImageResource(imageID);view.setScaleType(ScaleType.FIT_XY);imageViewsList.add(view);LayoutParams lp = new LayoutParams(63, 63,1);  lp.setMargins(500, 50, 500, 50);  ImageView viewImage = new ImageView(mContext);viewImage.setId(imageID);viewImage.setLayoutParams(lp);viewImage.setPadding(50, 0, 50, 0);if (num==0) {viewImage.setBackgroundResource(R.drawable.dot_focused);num++;}else {viewImage.setBackgroundResource(R.drawable.dot_normal);}mLyTest.addView(viewImage);}//// dotViewsList.add(findViewById(R.id.v_dot1));// dotViewsList.add(findViewById(R.id.v_dot2));viewPager = (ViewPager) findViewById(R.id.viewPager);viewPager.setFocusable(true);viewPager.setAdapter(new MyPagerAdapter());viewPager.setOnPageChangeListener(new MyPageChangeListener());}

Solution 1
It depends on the specific layout type of the mlytest variable, for example, linear layout, and then change the LP variable type to linearlayout. layoutparams. I have encountered this problem some time ago.

Setmargins does not work