Android Question android.,media.AudioManager - setWiredDeviceConnectionState

[Jmu5667]

Hi All

I need to get some help converting some java to B4A. Here the link http://stackoverflow.com/questions/33422325/how-to-hide-headset-icon


It nedd to uses reflection as mentioned in the link.

Here's the code:

AudioManager manager =(AudioManager) aContext.getSystemService(Context.AUDIO_SERVICE);

try{int deviceType =AudioSystem.DEVICE_OUT_WIRED_HEADSET;
// turn off headset
int state =0;
Class<?> cl =Class.forName("android.media.AudioManager");
Method method = cl.getMethod("setWiredDeviceConnectionState",newClass[]{Integer.TYPE,Integer.TYPE,String.class}); 
method.invoke(manager,newObject[]{ deviceType, state,"device"});}

catch(Exception e)

{ iLog.error("disableHeadset, exception {}",ExceptionUtils.getStackTrace(e));}

Thanks

John.

 

[Erel]

Not tested:

Dim jo As JavaObject
jo.InitializeContext
Dim r As Reflector
r.Target = jo.RunMethod("getSystemService", Array("audio")
r.RunMethod4("setWiredDeviceConnectionState", Array (deviceType, state, "device"), Array As String("java.lang.int", java.lang.int", "java.lang.String"))

 

[Jmu5667]

Not tested:

Dim jo As JavaObject
jo.InitializeContext
Dim r As Reflector
r.Target = jo.RunMethod("getSystemService", Array("audio")
r.RunMethod4("setWiredDeviceConnectionState", Array (deviceType, state, "device"), Array As String("java.lang.int", java.lang.int", "java.lang.String"))

Hi Erel

Many thanks for the help. That worked fine.

code updated so anyone else can use it

   Dim jo As JavaObject
   jo.InitializeContext
   
   Dim r As Reflector
   r.Target = jo.RunMethod("getSystemService", Array("audio"))
   r.RunMethod4("setWiredDeviceConnectionState", Array (4, 0, "device"), _
           Array As String("java.lang.int", "java.lang.int", "java.lang.String"))

A good reference is https://github.com/android/platform...ter/media/java/android/media/AudioSystem.java for const values.

Regards

John.

 

[Jmu5667]

He is a sample for anyone interested. I will be adding in more functions very soon. @lemonisdead @Johan Schoeman

 

[Jmu5667]

Updated version using media sessions compay

 

[Jmu5667]

Hello again

The code below failed on API 23 (Marshmallow), any ideas?

Sub reroute_speakerphone(state As Int)

   Dim jo As JavaObject
   jo.InitializeContext
   
   Dim r As Reflector
   
   Try
     r.Target = jo.RunMethod("getSystemService", Array("audio"))
     r.RunMethod4("setWiredDeviceConnectionState", Array (4, state, "device"), _
           Array As String("java.lang.int", "java.lang.int", "java.lang.String"))
   Catch
     ToastMessageShow(LastException.Message,True)
   End Try

End Sub

There is reference here, but it's all Java to me
https://github.com/AndroidSDKSource...3/blob/master/android/media/AudioManager.java

@lemonisdead
@stevel05

Regard

JOhn

 

[lemonisdead]

Hello John,
As usual, I don't have the reply but, couldn't it be an issue with the new permissions for SDK-23 ? Do we have any error code ?

 

[stevel05]

It appears that method is not in the official documentation : http://developer.android.com/reference/android/media/AudioManager.html although it would normally say if it was deprecated. Maybe an oversight.

Does it compile?

 

[stevel05]

Of course it compiles, you're accessing it using Reflection. Ignore that question.

I get a method not found error, is that the same error?

And it runs on my Android 5.1.1 device.

A little more reading and it looks like it was a private method. They may have just removed it.

 

[stevel05]

I can't find any other reference to it on Google, or Google developers.

 

[Jmu5667]

Hi guys, I just get the Method not found error, the app, KeyCut seems to achieve this, I shall look into it further today.

 

[lemonisdead]

My 50cts : could the appcompat version fix the problem ? I had got the same even on Lollipop and the latest code version fixed (perhaps something related to the chipset I had thought)

 

[Jmu5667]

My 50cts : could the appcompat version fix the problem ? I had got the same even on Lollipop and the latest code version fixed (perhaps something related to the chipset I had thought)

Have you tried the appcompat ?

@stevel05

 

[Jmu5667]

Found this

https://github.com/AndroidSDKSource...3/blob/master/android/media/AudioManager.java goto line 3122, this seems to take 4 parms unlike the current method which takes 3.

 /**
  * Indicate wired accessory connection state change.
  * @param device type of device connected/disconnected (AudioManager.DEVICE_OUT_xxx)
  * @param state  new connection state: 1 connected, 0 disconnected
  * @param name  device name
  * {@hide}
  */
  public void setWiredDeviceConnectionState(int type, int state, String address, String name) {
  IAudioService service = getService();
  try {
  service.setWiredDeviceConnectionState(type, state, address, name,
  mApplicationContext.getOpPackageName());
  } catch (RemoteException e) {
  Log.e(TAG, "Dead object in setWiredDeviceConnectionState "+e);
  }
  }

 

[stevel05]

Have you tried the appcompat ?

As it doesn't instantiate the class directly but calls getSystemService, we can only use the class that the system gives us. Unless it has been moved to a new class somewhere, which I couldn't find any documentation for. The documentation in the link is for AudioManager, which is what we've asked for in the code. If it just needed different parameters we would get a parameters not matched error.

I would guess that if the functionality is working in an app, there must be a different approach to achieving the same thing.

 

[stevel05]

the app, KeyCut seems to achieve this

Just looked at this app, it requires a rooted device, so maybe it does it at a lower level.

 

[Jmu5667]

Just looked at this app, it requires a rooted device, so maybe it does it at a lower level.

Thanks Steve

 

[Jmu5667]

Hi @stevel05 we have an unrooted HTC M9 and keycut seems to work on it. I know that the source of keycut is out that as I have come across it, however my java skills as a bit week

 

[stevel05]

I know that the source of keycut is out

Do you have a link to it?

 

[stevel05]

Well, I am at a loss, the method appears in the Android 6 source code listed here: http://androidxref.com/6.0.0_r5/xref/frameworks/base/media/java/android/media/AudioManager.java

But it's not in the official documentation here: http://developer.android.com/reference/android/media/AudioManager.html

And not in the SDK's android.jar, or on my nexus 7 device.

I couldn't see anything in the MediaRouter class that may help either.

There is not much more I can do I'm afraid.