Xamarin:如何构建在来电时执行代码的应用程序
问题描述:
我试图构建一个在后台运行并在传入呼叫时激活的应用程序,经过一些研究后,我发现我必须nativelly执行,但我的代码是什么都不做。Xamarin:如何构建在来电时执行代码的应用程序
如果有办法在PCL项目上做到这一点,请让我知道。 我正在使用服务和广播接收器。 这里是我的实际代码:
[Activity(Label = "Teste2", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
public static Context AppContext;
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
AppContext = this.ApplicationContext;
StartPushService();
}
public static void StartPushService()
{
AppContext.StartService(new Intent(AppContext, typeof(Services.BackgroundService)));
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Kitkat)
{
PendingIntent pintent = PendingIntent.GetService(AppContext, 0, new Intent(AppContext, typeof(Services.BackgroundService)), 0);
AlarmManager alarm = (AlarmManager)AppContext.GetSystemService(Context.AlarmService);
alarm.Cancel(pintent);
}
}
public static void StopPushService()
{
AppContext.StopService(new Intent(AppContext, typeof(Services.BackgroundService)));
PendingIntent pintent = PendingIntent.GetService(AppContext, 0, new Intent(AppContext, typeof(Services.BackgroundService)), 0);
AlarmManager alarm = (AlarmManager)AppContext.GetSystemService(Context.AlarmService);
alarm.Cancel(pintent);
}
}
服务:
[Service(Name = "com.xamarin.Teste2.BackgroundService")]
public class BackgroundService : Service
{
// Magical code that makes the service do wonderful things.
public override void OnCreate()
{
base.OnCreate();
}
public override StartCommandResult OnStartCommand(Android.Content.Intent intent, StartCommandFlags flags, int startId)
{
return StartCommandResult.Sticky;
}
public override Android.OS.IBinder OnBind(Android.Content.Intent intent)
{
return null;
}
public override void OnDestroy()
{
base.OnDestroy();
}
}
和广播接收器:
[BroadcastReceiver]
[IntentFilter(new[] { Android.Content.Intent.ActionAnswer })]
public class CallReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Incoming call from someone", ToastLength.Short).Show();
System.Console.WriteLine("Incoming call from someone");
}
}
答
这是不可能的,因为IOS不会允许它
你不能做它在PCL中,因为这种代码是由平台定义的。 iOS没有任何API来支持这一点。 – Jason
这很奇怪,我们不能控制IOS中的来电。 –
允许第三方应用程序干扰设备的基本功能将是一个巨大的安全风险 – Jason