用户在应用的当前Activity中按Home键后,重新进入应用时无需跑初始化Activity逻辑而直接进入之前的Activity,这时可以使用ActivityManager来解决,在初始化Activity逻辑中加入以下代码:
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> tasklist = am.getRunningTasks(1);
ActivityManager.RunningTaskInfo runTask = tasklist.get(0);
int n = runTask.numActivities;
if (n != 1) {
finish();
return ;
}