启动根系活力（一个具有ACTION = MAIN和类别= LAUNCHER在清单），并添加 Intent.FLAG_ACTIVITY_NEW_TASK 。如果应用程序已经处于活动状态（无论哪个活动是顶部），这将只是把任务前面。如果应用程序未激活，它会启动它与您的根系活力。

Launch the root activity (the one that has ACTION=MAIN and CATEGORY=LAUNCHER in the manifest) and add Intent.FLAG_ACTIVITY_NEW_TASK. If the app is already active (no matter which activity is on top) this will just bring the task to the front. If the app isn't active, it will start it with your root activity.