Android Question Read and Set phone screen-off time

[ducphu]

Hi everyone,

Can anyone show me how to read the current screen-off time setting and change it programmatically.
I checked through Phone library but there is only option to keep the screen always on. Thank you.

 

[Erel]

Here:

Sub Activity_Create(FirstTime As Boolean)
   SetScreenTimeout(120000)
   Log(GetScreenTimeout)
End Sub


Sub SetScreenTimeout(Timeout As Int) As Int
   Dim jo As JavaObject
   Return jo.InitializeStatic("android.provider.Settings.System") _
     .RunMethod("putInt", Array As Object(GetContext.RunMethod("getContentResolver", Null) _
     , "screen_off_timeout", Timeout))
End Sub

'Return the timeout measured in milliseconds
Sub GetScreenTimeout As Int
   Dim jo As JavaObject
   Return jo.InitializeStatic("android.provider.Settings.System") _
     .RunMethod("getInt", Array As Object(GetContext.RunMethod("getContentResolver", Null) _
     , "screen_off_timeout"))
End Sub

Sub GetContext As JavaObject
  Return GetBA.GetField("context")
End Sub

Sub GetBA As JavaObject
  Dim jo As JavaObject
  Dim cls As String = Me
  cls = cls.SubString("class ".Length)
  jo.InitializeStatic(cls)
  Return jo.GetFieldJO("processBA")
End Sub

Manifest editor:

AddPermission(android.permission.WRITE_SETTINGS)

 

[ducphu]

Hi Erel, thanks a lot. The GetScreenTimeOut works great, but when I try SetScreenTimeOut, I got the following error:

java.lang.NumberFormatException: Invalid double: "true"
at java.lang.StringToReal.invalidReal(StringToReal.java:63)
at java.lang.StringToReal.initialParse(StringToReal.java:94)
at java.lang.StringToReal.parseDouble(StringToReal.java:263)
at java.lang.Double.parseDouble(Double.java:295)
at anywheresoftware.b4a.BA.ObjectToNumber(BA.java:612)
at b4a.example.main._setscreentimeout(main.java:3111)
at b4a.example.main._activity_create(main.java:597)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:174)
at b4a.example.main.afterFirstLayout(main.java:98)
at b4a.example.main.access$100(main.java:16)
at b4a.example.main$WaitForLayout.run(main.java:76)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:5225)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)

My code in Activity_Create sub is

If GetScreenTimeout < 120000 Then SetScreenTimeout(120000)

 

[ducphu]

Ok Solved it. It should be

Sub SetScreenTimeout(Timeout AsInt)

not

Sub SetScreenTimeout(Timeout AsInt) As Int

Now another issue is, I want to change the screen time out to, let say 120000 when my app is running, and then reset it back to user's setting when my app is closed. I manage to do that if the user click on "Quit" button in my app or click on BACK_KEY., but I cant do it if user click the HOME_KEY, since as I read through some tut that HOME_KEY is not captured. So, is there anyone have solution for my problem?

 

[Erel]

Reset the value in Activity_Pause and set it again in Activity_Resume.

 

[Embouk]

I know this is an old thread but i'm trying to change the screen timeout time but can't get it to work. the code above doesn't seem to work for me. it says in the log 120000 but when i check it on my device it doesn't time out and when i check the display settings it says 2 minutes. any help would be great. thanks in advanced

 

[DonManfred]

1 Second are 1000 ms
120 Second = 2 Minutes
2 minutes = 120000 ms

 

[Embouk]

Oops. I'm so sorry. it's been a long day. thank you DonManfred.

 

[jeronimovilar]

Whas is this error:
main_setscreentimeout (java line: 298)

java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:84)
at teste.tela.main._setscreentimeout(main.java:298)
at teste.tela.main._activity_create(main.java:211)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
at teste.tela.main.afterFirstLayout(main.java:84)
at teste.tela.main.access$100(main.java:16)
at teste.tela.main$WaitForLayout.run(main.java:72)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.SecurityException: Permission Denial: writing com.android.providers.settings.SettingsProvider uri content://settings/system from pid=568, uid=10038 requires android.permission.WRITE_SETTINGS
at android.os.Parcel.readException(Parcel.java:1322)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:160)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:408)
at android.content.ContentResolver.insert(ContentResolver.java:604)
at android.provider.Settings$NameValueTable.putString(Settings.java:575)
at android.provider.Settings$System.putString(Settings.java:771)
at android.provider.Settings$System.putInt(Settings.java:854)
... 20 more
java.lang.reflect.InvocationTargetException

----------------------------------------------------------
MANIFEST EDITOR:
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="4" />
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
AddPermission(android.permission.WRITE_SETTINGS)
'End of default text.

 

[DonManfred]

Caused by: java.lang.SecurityException: Permission Denial: writing com.android.providers.settings.SettingsProvider uri content://settings/system from pid=568, uid=10038 requires android.permission.WRITE_SETTINGS

But as you wrote it is already in your manifest.
So i don´t know what next, sorry.

 

[Erel]

It does work here, on a Nexus 5 device running Android 6:

Sub SetScreenTimeout(Timeout As Int)
  Dim jo As JavaObject
  Dim context As JavaObject
  context.InitializeContext
  jo.InitializeStatic("android.provider.Settings.System") _
  .RunMethod("putInt", Array As Object(context.RunMethod("getContentResolver", Null) _
  , "screen_off_timeout", Timeout))
End Sub

 

[jeronimovilar]

with new sub(setscreentimeout):

Compiling code. Error
Error compiling program.
Error description: Unknown member: initializecontext
Occurred on line: 23
context.InitializeContext
Word: initializecontext

 

[DonManfred]

Do you have the newest Javaobject library?
Maybe it is you B4A version; which version of b4a are you using?

 

[jeronimovilar]

Javaobject library is ok
Version: 2.02

 

[DonManfred]

Javaobject library is ok
Version: 2.02

2.05 is the newest
https://www.b4x.com/android/help/javaobject.html

 

[jeronimovilar]

thanks
It´s working fine: (sorry my english)

Sub SetScreenTimeout(Timeout As Int)
Dim jo As JavaObject
Return jo.InitializeStatic("android.provider.Settings.System") _
.RunMethod("putInt", Array As Object(GetContext.RunMethod("getContentResolver", Null) _
, "screen_off_timeout", Timeout))
End Sub

 

[DonManfred]

i´m sure erel has posted it somewhere...
Edit: But maybe it is part of b4a 5.8 installation?

see attached. Make sure to copy it to the INTERNAL librariesfolder!