简单和简单的方法退出应用程序

Intent homeIntent = new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_HOME);
homeIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);

要退出应用程序，您可以使用以下命令:

getActivity().finish();
Process.killProcess(Process.myPid());
System.exit(1);

也可以调用下面的方法来停止服务:

private void stopServices() {        
    final ActivityManager activityManager = SystemServices.getActivityManager(context);
    final List<ActivityManager.RunningServiceInfo> runningServices = activityManager.getRunningServices(Integer.MAX_VALUE);
    final int pid = Process.myPid();
    for (ActivityManager.RunningServiceInfo serviceInfo : runningServices) {
        if (serviceInfo.pid == pid && !SenderService.class.getName().equals(serviceInfo.service.getClassName())) {
            try {
                final Intent intent = new Intent();
                intent.setComponent(serviceInfo.service);
                context.stopService(intent);
            } catch (SecurityException e) { 
                 // handle exception
            }
        }
    }
}

getActivity().finish();
System.exit(0);

这是退出应用程序的最佳方式!!

对我来说最好的解决方案。

从API 16开始，你可以使用finishAffinity方法，它似乎非常接近于通过它的名称和Javadoc描述关闭所有相关的活动:

this.finishAffinity();

Finish this activity as well as all activities immediately below it in the current task that have the same affinity. This is typically used when an application can be launched on to another task (such as from an ACTION_VIEW of a content type it understands) and the user has used the up navigation to switch out of the current task and into its own task. In this case, if the user has navigated down into any other activities of the second application, all of those should be removed from the original task as part of the task switch. Note that this finish does not allow you to deliver results to the previous activity, and an exception will be thrown if you are trying to do so.

从API 21开始，您可以使用非常类似的命令

finishAndRemoveTask();

完成此任务中的所有活动，并将其从最近任务列表中移除。

只是在终止应用程序的残酷方法列表中添加一个:

Process.sendSignal (Process.myPid (), Process.SIGNAL_KILL);

如果你在Activity中，最好使用finish()，如果你在Fragment中，最好使用getActivity().finish()。

如果你想完全退出应用程序，那么使用:

getActivity().finish();
System.exit(0);