开发笔记:android气泡小红点（BadgeView）

BadgeView可以实现类似效果&＃xff1a;

引入方法&＃xff1a;

1.在build.gradle中引入依赖

implementation (&＃39;q.rorbin:badgeview:1.1.3&＃39;)//气泡小红点

2.编写工具类BadgeUtil

public class BadgeUtil {
/**
* 右上小红点数量提示
* &＃64;param context 当前的activity
* &＃64;param view 要显示的控件
* &＃64;param i 数量&＃xff08;点内数字&＃xff09;
*/
public static void Badge(Context context, View view, int i){
new QBadgeView(context)
.bindTarget(view)
.setBadgeNumber(i)
.setBadgeGravity(Gravity.END | Gravity.TOP)
.setGravityOffset(10,0,true);
}
}

3.使用时

//气泡提示小红点
BadgeUtil.QBadge(getContext(),relativeLayoutFriendInform,1);

4.使用BottomNavigationView布局时&＃xff0c;要在含有此布局的Activity中实现

BottomNavigationView navView &＃61; findViewById(R.id.nav_view);
...
BottomNavigationMenuView itemView &＃61;(BottomNavigationMenuView) navView.getChildAt(0);
BadgeUtil.QBadge(this, itemView.getChildAt(3),9);//从0开始
BadgeUtil.QBadge(this, itemView.getChildAt(4),1);