lets consider I have an Xyz SDK that has special type of activity and delegates, in java you have to do
public class MyDemoActivity extends XyzUiActivity implements
XyzOperationDelegate,
XyzOperationDelegate.OperationListener,
.........
#Override public void operationEvent(XyzObject t, XyzOperation.XyzObject detailedOperationData) {
// code
}
Please any help on how to implement this in nativescript? I'm using typescript and angular.
Related
I know that i can launch a Xamarin Forms page from an Native Android Activity, but how do i start a Native Android Activity from Xamarin Forms ContentPage. I tried with DependencyService but without success.
I figured it out.
First i needed to create a Interface like this in Xamarin Project
public interface IRecordVideoPage
{
void StartNativeIntentOrActivity();
}
then i launched the Native Android Activity from my Xamarin Forms Content Page using Dependency Service like this:
DependencyService.Register<IRecordVideoPage>();
DependencyService.Get<IRecordVideoPage>().StartNativeIntentOrActivity();
next I created a RecordActivity class in my Android Project that loads the Test Activity
[assembly: Xamarin.Forms.Dependency(typeof(RecordActivity))]
namespace StreamTest.Droid
{
[Activity(Label = "RecordActivity")]
public class RecordActivity : IRecordVideoPage
{
public void StartNativeIntentOrActivity()
{
var intent = new Intent(Forms.Context, typeof(Test));
Forms.Context.StartActivity(intent);
}
}
finally I set the content view in the Test class:
public class Test : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
public Test() { }
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Record);
}
}
}
DependencyService is your best option. The concept behind PCL (Portable Class Library) is exactly to be platform independet.
Maybe we can help if you show the error you are getting with Dependency Service
I would like to parse an android app's build.gradle file in Java and I am trying to use Groovy CodeVistorSupport for that as follows:
public class parseBuildGradle extends CodeVisitorSupport{
#Override
public void visitMethodCallExpression(MethodCallExpression call)
{
//My code
}
}
In order to use this class, I assume I should somehow get the compilation unit or ast and then call the class. However, I am not sure what APIs I should be using and unfortunately I could not find any related documentation. I am wondering if anyone can help me with that.
Below is a possible answer to my question:
SourceUnit unit = SourceUnit.create("gradle", gradleFileToString);
unit.parse();
unit.completePhase();
unit.convert();
visitScriptCode(unit, new parseBuildGradle());
private void visitScriptCode(SourceUnit source, GroovyCodeVisitor transformer) {
source.getAST().getStatementBlock().visit(transformer);
for (Object method : source.getAST().getMethods()) {
MethodNode methodNode = (MethodNode) method;
methodNode.getCode().visit(transformer);
}
}
Is there a way in Xamarin's WebView that allows me to attach javascript events to my html elements and call C# method.
I could easily do this in Android by using JavaScriptInterface
<video width="320" height="240" controls="controls" poster='poster.gif'
onclick="window.JSInterface.startVideo('file:///sdcard/test.3gp');"
How would I manage to this in Xamarin
Create a JavaScript Interface Class
Create a C# class that contains methods to be called from JavaScript.
If you are targeting Android API level 17 or later, this
JavaScript-to-C# interface class must annotate each
JavaScript-callable method with [JavascriptInterface] and [Export]
as shown in the following example. If you are targeting Android API
Level 16 or earlier, this interface class must implement
Java.Lang.IRunnable as explained in Android API Level 16 and
Earlier (later in this recipe):
Create a C# class that is derived from Java.Lang.Object. In the following example, we name our class MyJSInterface and implement a
method to display a toast when it is called from JavaScript:
public class MyJSInterface : Java.Lang.Object
{
Context context;
public MyJSInterface (Context context)
{
this.context = context;
}
public void ShowToast ()
{
Toast.MakeText (context, "Hello from C#", ToastLength.Short).Show ();
}
}
Annotate each method that is to be exposed to JavaScript with [Export] and [JavascriptInterface] (see IJavascriptInterface
for more information about the JavascriptInterface annotation). In
the following example, the ShowToast method is annotated so that it
can be called from JavaScript. Note that you must include the
Java.Interop and Android.Webkit using statements as shown in this
example:
using Java.Interop;
using Android.Webkit;
...
[Export]
[JavascriptInterface]
public void ShowToast ()
{
Toast.MakeText(context, "Hello from C#", ToastLength.Short).Show();
}
Add a project reference to Mono.Android.Export (so you can use the [Export] annotation):
1.In Visual Studio, right-click References in the Solution Explorer and select Add Reference.... In Xamarin Studio,
right-click References in the Solution Pad and select Edit
References....
2.In the search field, enter Mono.Android.Export. When you have located it, enable the check mark next to it and click OK.
Refer :
http://dotnetthoughts.net/how-to-invoke-c-from-javascript-in-android/
https://developer.xamarin.com/recipes/android/controls/webview/call_csharp_from_javascript/
https://developer.xamarin.com/samples/monodroid/WebViewJavaScriptInterface/
https://developer.xamarin.com/api/type/Android.Webkit.JavascriptInterface/
Is there a way to programmatically access the application package name/namespace/version information in Xamarin portable C# code?
Like this (link is how to access for Android, I want to know if there is a pre-existing C# cross platform way to access this in the portable class code.)
Not this.
i got answer to your problem, but it is using dependency service to work. There is no other way if there is no Xamarin plugin.
Here is the code:
Interface in pcl project:
public interface IPackageName
{
string PackageName { get; }
}
Android implementation:
public class PackageNameDroid : IPackageName
{
public PackageNameDroid()
{
}
public string PackageName
{
get { return Application.Context.PackageName; }
}
}
iOS implementation:
public class PackageNameIOS : IPackageName
{
public PackageNameIOS()
{
}
public string PackageName
{
get { return NSBundle.MainBundle.BundleIdentifier; }
}
}
Don't forget to mark platform files for dependency service in Android file:
[assembly: Xamarin.Forms.Dependency(typeof(PackageNameDroid))]
and iOS file:
[assembly: Xamarin.Forms.Dependency(typeof(PackageNameIOS))]
Now you're good to go and can use it in PCLs just like that:
string packageName = DependencyService.Get<IPackageName>().PackageName;
Hope it helps others.
I am trying to use following libraries to develop my app.
Robospice
Gson
and Spring for android
To do so, In my gradle file I have following dependencies added
compile 'com.octo.android.robospice:robospice-spring-android:1.4.13'
compile 'com.google.code.gson:gson:2.2.4'
And in manifest file, I have following lines inserted inside application tag.
<service
android:name="com.octo.android.robospice.GsonSpringAndroidSpiceService"
android:exported="false" />
Now, I created a base class that is used as Base Activity. And, I have did this in the following way:
public class BaseSpiceActivity extends Activity {
private SpiceManager spiceManager = new SpiceManager(GsonSpringAndroidSpiceService.class);
#Override
protected void onStart() {
spiceManager.start(this);
super.onStart();
}
#Override
protected void onStop() {
spiceManager.shouldStop();
super.onStop();
}
protected SpiceManager getSpiceManager() {
return spiceManager;
}
}
And then I used that base class to extend my own class where I had to use spice service request.
SimpleTextRequest text = new SimpleTextRequest(placeUrl);
getSpiceManager().execute(text, "place", DurationInMillis.ONE_MINUTE, new RequestListener<String>() {
//Other functions and codes
}
)
But when the above code gets executed, I am getting following error
E/AndroidRuntime﹕ FATAL EXCEPTION: SpiceManagerThread 0
java.lang.RuntimeException: Impossible to start SpiceManager as no service of class : com.octo.android.robospice.SpiceService is registered in AndroidManifest.xml file !
at com.octo.android.robospice.SpiceManager.checkServiceIsProperlyDeclaredInAndroidManifest(SpiceManager.java:1287)
at com.octo.android.robospice.SpiceManager.tryToStartService(SpiceManager.java:1168)
at com.octo.android.robospice.SpiceManager.run(SpiceManager.java:247)
at java.lang.Thread.run(Thread.java:856)
I have been trying to solve the issue from many hours. But unfortunately couldn't. Please help me out.
I am 100% sure you got messed somewhere. Search for new SpiceManager(SpiceService.class); in your code, and you will find out that you do use this service instead of the desired GsonSpringAndroidSpiceService.
You need to declare your service in your manifest.xml
Like this
<service android:name=".SampleRetrofitService"
android:exported="false"/>
Try to find out where using SpiceManager.
In my case, I named a activity SpiceActivity, and others extend it.
But robospice library also offer a activity named SpiceActivity. And it uses new SpiceManager(SpiceService.class)
So activity extends the wrong SpiceActivity which use SpiceService, then cause the error.