Android 新手引导蒙层效果实现代码示例
时间：2021-01-08 12:18:30 | 栏目：Android代码 | 点击：次
先上效果图：
这个效果一开始我是想直接让UI给个切图，后来发现这样不行，适配很差，达不到效果。所以就自己动手写代码，其实思路也很简单：在这个布局的父布局上面再手动添加一个view（通常LinearLayout比较方便），然后把这个linearlayout的背景设置成#88000000，之后就是给这个linearlayout动态增加子view，初步效果就能达到。
下面直接上代码：
public void showGuideView() {
View view = getWindow().getDecorView().findViewById(R.id.activity_main);
if (view == null) return;
ViewParent viewParent = view.getParent();
if (viewParent instanceof FrameLayout) {
final FrameLayout frameParent = (FrameLayout) viewParent;//整个父布局
final LinearLayout linearLayout = new LinearLayout(this);//新建一个LinearLayout
linearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setBackgroundResource(#88000000);//背景设置灰色透明
linearLayout.setGravity(Gravity.CENTER_HORIZONTAL);
linearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
frameParent.removeView(linearLayout);
}
});
Rect rect = new Rect();
Point point = new Point();
nearby.getGlobalVisibleRect(rect, point);
//获得nearby这个控件的宽高以及XY坐标 nearby这个控件对应就是需要高亮显示的地方
ImageView topGuideview = new ImageView(this);
topGuideview.setLayoutParams(new ViewGroup.LayoutParams(rect.width(), rect.height()));
topGuideview.setBackgroundResource(R.drawable.iv_topguide);
Rect rt = new Rect();
getWindow().getDecorView().getWindowVisibleDisplayFrame(rt);
topGuideview.setY(point.y - rt.top);//rt.top是手机状态栏的高度
ImageView bottomGuideview = new ImageView(this);
bottomGuideview.setLayoutParams(new ViewGroup.LayoutParams(WRAP_CONTENT, WRAP_CONTENT));
bottomGuideview.setBackgroundResource(R.drawable.iv_bottomguide);
bottomGuideview.setY(point.y + topGuideview.getHeight());
linearLayout.addView(topGuideview);
linearLayout.addView(bottomGuideview);
frameParent.addView(linearLayout);
}
}