解决方法
首先,这里需要知道的是前台运行的应用程序是什么：
您可以使用ActivityManager.getRunningAppProcesses()调用检测当前的前台/后台应用程序.
所以,它看起来像::
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();
您也可以查看一下：Determining foreground/background processes.
要测量进程运行其到期时间所花费的时间,您可以使用此方法：
getElapsedcpuTime()
请参阅此article.
