Android：在应用程序暂停时调用的BroadcastReceiver（）onReceive

Question

我有一个BroadcastReceiver（），即使应用程序暂停/死亡，也会调用onReceive方法。我希望只有当用户从主屏幕打开通知时才会调用onReceive，我该怎么做？

MainClass：

private ObservableCollection<SalesPeriodV> salesPeriods = new ObservableCollection<SalesPeriodV>();
public ObservableCollection<SalesPeriodV> SalesPeriods
{
    get { return salesPeriods; }
    set { salesPeriods = value; OnPropertyChanged("SalesPeriods"); }
}
private SalesPeriodV selectedItem = new SalesPeriodV();
public SalesPeriodV SelectedItem
{
    get { return selectedItem; }
    set { selectedItem = value; OnPropertyChanged("SelectedItem"); }
}

private void _ComboBoxCurrencyExchange_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ComboBox cb = (ComboBox)sender;
    SelectedItem = (SalesPeriodV)(cb.SelectedItem);
    string text = cb.SelectedValue.ToString();
}

BroadCastReceiver类

 broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            }
    };

    final Intent intent = registerReceiver(broadcastReceiver, intentFilter);

清单

 Intent intent;
    if(rootActivity.getPackageName().equalsIgnoreCase("myapp"))
    {
        //your app is open
        intent = new Intent();
        intent.setComponent(rootActivity);

    } else {
        //your app is not open,start it by calling launcher activity
        intent = new Intent(context, MainActivity.class);
    }

    intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    mBuilder.setContentIntent(contentIntent);