逻辑是获取系统的运行栈,处于栈顶的就是处于前台的app,然后对比包名,不同则表示app处于后台,反之,则表示app处于前台.
/** * app是否在后台 * * @param context * @return true 是 false 不是 */ public static boolean isBackground(Context context) { ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); List<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1); if (!tasks.isEmpty()) { ComponentName topActivity = tasks.get(0).topActivity; StaticMethod.debugEMSG(topActivity.getPackageName() + " : " + context.getPackageName()); if (!topActivity.getPackageName().equals(context.getPackageName())) { return true; } } return false; }