android – isApplicationBroughtToBackground安全功能经常行为不端

为您的活动准备基础课程.在里面：

@Override
protected void onPause() {
    Utils.wenTinBACkground(this);
    super.onPause();
}

@Override
protected void onResume() {
    Utils.wenTinForeground(this);
    super.onResume();
}@H_419_17@ 
 
然后在静态实用程序类中有这样的：
 
  
 
public static void wenTinBACkground(final Activity which) {
    inBACkground = true;
    lastPaused = which.getClass().getSimplename();

    final PoweRMANager poweRMANager = (PoweRMANager) which.getSystemservice(POWER_serviCE);
    final Boolean isScreenOn = poweRMANager.isScreenOn();

    if (isApplicationSentToBACkground(which) || !isScreenOn) {
        // Do your security lockdown here.
    }
}


public static Boolean isApplicationSentToBACkground(final Context context) {
    Activitymanager am = (Activitymanager) context.getSystemservice(Context.ACTIVITY_serviCE);
    List<RunningTaskInfo> tasks = am.getRunningTasks(1);

    if (!tasks.isEmpty()) {
        ComponentName topActivity = tasks.get(0).topActivity;
        if (!topActivity.getPackagename().equals(context.getPackagename())) {
            return true;
        }
    }

    return false;
}


public static void wenTinForeground(final Activity which) {
    inBACkground = false;
    final String activityName = which.getClass().getSimplename();

    if (lastPaused.equals(activityName) || !isLoggedIn()) {

        if (isLoggedIn()) {
             // Do your security lockdown here again,if necessary.
        }

        // Show your security screen or whatever you need to.
    }
}

public static Boolean isLoggedIn() {
    return loggedIn;
}@H_419_17@