问题描述
我是新来的机器人。在我的应用程序，我想跟踪多少时间，其他应用程序（这是安装在设备）的使用（在前台）。
I am new to android. In my application, i want to track for how much time other applications (which are installed on device) are used (in foreground).
这可能吗？如果是的话怎么办？
Is it possible? If yes then how?
在此先感谢！
推荐答案
第一件事情，这是需要被称这里是什么是被在前台运行的应用程序：
First thing , that's required to be known here is what are the applications that are running in the foreground :
您可以检测当前与前景/背景的应用程序 ActivityManager.getRunningAppProcesses（）电话。
You can detect currently foreground/background application with ActivityManager.getRunningAppProcesses() call.
因此，它看起来像::
So, it will look something like ::
class findForeGroundProcesses extends AsyncTask<Context, Void, Boolean> {
@Override
protected Boolean doInBackground(Context... params) {
final Context context = params[0].getApplicationContext();
return isAppOnForeground(context);
}
private boolean isAppOnForeground(Context context) {
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
if (appProcesses == null) {
return false;
}
final String packageName = context.getPackageName();
for (RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
return true;
}
}
return false;
}
}
// Now you call this like:
boolean foreground = new findForeGroundProcesses().execute(context).get();
您也许可以看看这个还有：Determining前台/后台进程。
You can probably check this out as well : Determining foreground/background processes.
要衡量其运行适当的时候采取的方法的时候，你可以用这个方法：
To measure the time taken by a process to run its due course , you can use this method :
getElapsedCpuTime()
请参阅此文章。
这篇关于测量时间花在Android应用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！