CODEWITHSUNDEEP
android
LaurentY
LaurentY

Reputation: 7653

Is Presentation API supported on android version 11 or greater?

I have a project using secondary display, using Presentation API. It works with emulator with Android 10, device with Android 9 but not with emulator with Android 11 or 12.

On emulator, I create secondary display as shown on picture: enter image description here

Here my activity:

class MainActivity : AppCompatActivity() {
    private var presentation: Presentation?  = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        val displayManager = getSystemService(Context.DISPLAY_SERVICE) as DisplayManager
        if (displayManager.displays != null && displayManager.displays.size > 1) {
            val display = displayManager.displays[1]
            presentation = TestPresentation(this, display)
        }
    }

    override fun onResume() {
        presentation?.show()
        super.onResume()
    }

    override fun onPause() {
        presentation?.hide()
        super.onPause()
    }
}

And my presentation

class TestPresentation(context: Context, display: Display): Presentation(context,display) 
{
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        requestWindowFeature(Window.FEATURE_NO_TITLE)
        setContentView(R.layout.presentation_layout)
    }
}

On Android 11 or greater, I've got this error:

2022-03-21 22:44:55.458 3563-3563/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.testpresentation2, PID: 3563 java.lang.RuntimeException: Unable to resume activity {com.example.testpresentation2/com.example.testpresentation2.MainActivity}: android.view.WindowManager$InvalidDisplayException: Unable to add window android.view.ViewRootImpl$W@9b166b1 -- the specified display can not be found at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4444) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4476) at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) Caused by: android.view.WindowManager$InvalidDisplayException: Unable to add window android.view.ViewRootImpl$W@9b166b1 -- the specified display can not be found at android.view.ViewRootImpl.setView(ViewRootImpl.java:1096) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:409) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:109) at android.app.Dialog.show(Dialog.java:340) at android.app.Presentation.show(Presentation.java:257) at com.example.testpresentation2.MainActivity.onResume(MainActivity.kt:35)

Upvotes: 4

Views: 934

Answers (1)

LaurentY
LaurentY

Reputation: 7653

There's a bug in AVD/Emulator.

Emulator extended control needs to support passing flags for the display setup. A display needs to explicitly specify FLAG_PRESENTATION in order to be a valid target for a presentation.

Issue open on google tracker: https://issuetracker.google.com/issues/227218392

Upvotes: 2

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