摘要: 不显示小数点后的0,只显示2位小数 DecimalFormat df = new DecimalFormat(".##"); double num = 450.029000089; System.out.println(df.format(num)); 打印结果:450.03 阅读全文
posted @ 2019-12-04 14:22 滴滴打的哒 阅读(507) 评论(0) 推荐(0) 编辑
摘要: private boolean isForeground() { ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); List<ActivityManager. 阅读全文
posted @ 2019-11-27 18:21 滴滴打的哒 阅读(346) 评论(0) 推荐(0) 编辑