Android 判断app是否在前台还是在后台运行

来源：互联网发布：剑三网络延迟不稳定编辑：程序博客网时间：2024/04/30 02:06

Android 判断app是否在前台还是在后台运行，直接看代码，可直接使用。

    public static boolean isBackground(Context context) {              ActivityManager activityManager = (ActivityManager) context                      .getSystemService(Context.ACTIVITY_SERVICE);              List<RunningAppProcessInfo> appProcesses = activityManager                      .getRunningAppProcesses();              for (RunningAppProcessInfo appProcess : appProcesses) {                  if (appProcess.processName.equals(context.getPackageName())) {                      /*                     BACKGROUND=400 EMPTY=500 FOREGROUND=100                     GONE=1000 PERCEPTIBLE=130 SERVICE=300 ISIBLE=200                      */                      Log.i(context.getPackageName(), "此appimportace ="                              + appProcess.importance                              + ",context.getClass().getName()="                              + context.getClass().getName());                      if (appProcess.importance != RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {                          Log.i(context.getPackageName(), "处于后台"                                  + appProcess.processName);                          return true;                      } else {                          Log.i(context.getPackageName(), "处于前台"                                  + appProcess.processName);                          return false;                      }                  }              }              return false;          }

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