Android Question UsageStatsManager

MarcoRome · Oct 26, 2016

Hi all. If i write this line in Javaobject:

B4X:

Dim jo As JavaObject
Log(jo.InitializeStatic("android.app.usage.UsageStatsManager").RunMethodJO("isAppInactive",Array As String("b4a.example")))

i have this error:

** Service (starter) Create **
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
main_activity_create (B4A line: 37)
Log(jo.InitializeStatic("android.app.usage.UsageSt
java.lang.IllegalArgumentException: Expected receiver of type android.app.usage.UsageStatsManager, but got java.lang.Class<android.app.usage.UsageStatsManager>
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:131)
at anywheresoftware.b4j.object.JavaObject.RunMethodJO(JavaObject.java:138)
at b4a.example.main._activity_create(main.java:371)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at b4a.example.main.afterFirstLayout(main.java:102)
at b4a.example.main.access$000(main.java:17)
at b4a.example.main$WaitForLayout.run(main.java:80)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

THIS IS DOCUMENTATION

Where :

Where i wrong ?
Thank you

Erel · Oct 26, 2016

You can only call static methods when you the object is initialized with InitializeStatic.

The correct way to access UsageStatsManager is:

B4X:

Dim ctxt As JavaObject
ctxt.InitializeContext
Dim stats As JavaObject = ctxt.RunMethod("getSystemService", Array("usagestats"))
'work with stats.

MarcoRome · Oct 26, 2016

Thank you Erel , now work. But with Android 5.1.1 i have this message:

java.lang.RuntimeException: Method: isAppInactive not found in: android.app.usage.UsageStatsManager

with Android 6.0.1 work without problem.

Any idea ?
Thank you
Marco

inakigarm · Oct 26, 2016

Was added on SDK 23

Check also https://developer.android.com/sdk/api_diff/23/changes.html
https://developer.android.com/sdk/api_diff/23/changes.html

DonManfred · Oct 26, 2016

https://www.b4x.com/android/forum/threads/usagestatsmanager.72377/

Android Question UsageStatsManager

MarcoRome

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Erel

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MarcoRome

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inakigarm

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