Android Question [SOLVED] [Things] How to use the new 3 APIs to control settings in Android Things

[Carlengue]

Google added new APIs in Android Things DP6 to control device settings, including display orientation, uses three different APIs to control settings for the screen (display), system time, and available locales.

How can use it in B4A? I use the orignal raspberry PI touch screen Display, and work perfectly using B4A.

Classes:

-ScreenManager, to control different screen-related settings
-TimeManager, to control different time-related settings
-DeviceManager, to control the list of locales available to the device.

https://developer.android.com/things/sdk/apis/settings.html

Thanks.

 

[Erel]

Is there any specific API that you want to call?

 

[Carlengue]

Is there any specific API that you want to call?

Hi Erel,

Yes, for me the most importat API is the "ScreenMangaer"

Thanks

 

[Erel]

Dim ScreenManager, ScreenManagerStatic As JavaObject
ScreenManager.InitializeNewInstance("com.google.android.things.device.ScreenManager", Array(0))
ScreenManagerStatic.InitializeStatic("com.google.android.things.device.ScreenManager")

ScreenManager.RunMethod("setBrightnessMode", Array(ScreenManagerStatic.GetField("BRIGHTNESS_MODE_MANUAL"))
ScreenManager.RunMethod("setBrightness", Array(255))
ScreenManager.RunMethod("lockRotation", Array(ScreenManagerStatic.GetField("ROTATION_90"))

https://developer.android.com/things/reference/com/google/android/things/device/ScreenManager.html

 

[Carlengue]

I have tried the code that you have given me and I receive the following error, which the class does not find. I have the latest version of Android Things installed

Error occurred on line: 185 (Main)
java.lang.ClassNotFoundException: com.google.android$things$device$ScreenManager
at anywheresoftware.b4j.object.JavaObject.getCorrectClassName(JavaObject.java:288)
at anywheresoftware.b4j.object.JavaObject.InitializeNewInstance(JavaObject.java:83)
at b4a.Carlos.main._boton_brillo_click(main.java:559)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:710)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:339)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:139)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:6294)
at android.view.View$PerformClick.run(View.java:24770)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
** Activity (main) Pause, UserClosed = true **

 

[Erel]

Are you using the latest developer preview version?

 

[Carlengue]

Yes.

Version: 0.6.1-devpreview

I need to add any #AdditionalJar?

 

[Erel]

Try to replace androidthings.jar with the one attached. Make sure to clean the project afterward.

 

[Carlengue]

I ve change the androidthings,jar and when compiling gives this error:

PARSE ERROR:
unsupported class file version 52.0
...while parsing com/google/android/things/AndroidThings.class
1 error; aborting

In the manifest i have this line:

AddApplicationText(<uses-library android:name="com.google.android.things"/>)

 

[Carlengue]

I've put back the old androidthings.jar and made some modifications
Now the error seems to be of permissions.

Caused by: java.lang.SecurityException: Calling process requires permission com.google.android.things.permission.MODIFY_SCREEN_SETTINGS

Error occurred on line: 225 (Main)
java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:131)
    at b4a.Carlos.main._boton_brillo_click(main.java:600)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:710)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:339)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:139)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:6294)
    at android.view.View$PerformClick.run(View.java:24770)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6494)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.SecurityException: Calling process requires permission com.google.android.things.permission.MODIFY_SCREEN_SETTINGS
    at android.os.Parcel.readException(Parcel.java:2004)
    at android.os.Parcel.readException(Parcel.java:1950)
    at com.google.android.things.internal.device.IDeviceManagementService$Stub$Proxy.setScreenBrightnessMode(IDeviceManagementService.java:385)
    at com.google.android.things.device.ScreenManager.setBrightnessMode(ScreenManager.java:155)
    ... 21 more

 

[DonManfred]

Try to add

AddPermission(com.google.android.things.permission.MODIFY_SCREEN_SETTINGS)

to your manifesteditor

 

[Carlengue]

Yes i ve test it and the first time it dont work

I ve reboot the RPI3 and now works

Thanks