If we leave the game by pressing the back button or by exiting the app then the game's undo history is lost. I sometimes run into this problem when I accidentally press the back button in the middle of a long "trial and error" deduction. When that happens I can't undo those moves anymore and basically have to reset the puzzle and start again from scratch.

If the arrow next to the high-score heading is clicked it does not do anything

Sudoku used 7% of my battery in 3 minutes.

Sony Xperia Z1
Kitkat 4.4.4

java.lang.RuntimeException: at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4226) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4328) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3427) at android.app.ActivityThread.access$1100(ActivityThread.java:229) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:7407) at java.lang.reflect.Method.invoke(Native Method:0) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.IllegalArgumentException: at java.lang.Enum.valueOf(Enum.java:200) at org.secuso.privacyfriendlysudoku.ui.GameActivity.onResume(GameActivity.java:250) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1287) at android.app.Activity.performResume(Activity.java:7015) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4215)

Settings:

• Highlight input mistakes

1. Open Sudoku
2. Solve it with mistakes
3. Clear board
4. Mistakes still highlighted

because of #8, i recently saw my phone power down in the middle of a "difficult"-level game. when i restarted the phone, the game was gone!!! i was expecting the game to be automatically saved because there is a "continue" button on the main screen.

When adding small numbers, sometimes it becomes obvious that that number can only be in one box, and so I need to switch to big numbers, enter it, then back to small numbers to continue working through the puzzle.

I'd like to propose allowing to enter big numbers when in small numbers mode by long-pressing in a box, and vice versa. I think this will help make the app more user-friendly.

The levels in Sudoku are too hard compared to other applications and "offline" Sudokus.
The levels must be adjusted.

It would be helpful if we could see cells populated originally in one color, cells populated by us in another color, and cells penciled in with a given value in a third color.

java.lang.NullPointerException: at org.secuso.privacyfriendlysudoku.ui.TutorialActivity.launchHomeScreen(TutorialActivity.java:133) at org.secuso.privacyfriendlysudoku.ui.TutorialActivity.access$000(TutorialActivity.java:30) at org.secuso.privacyfriendlysudoku.ui.TutorialActivity$2.onClick(TutorialActivity.java:103) at android.view.View.performClick(View.java:5721) at android.widget.TextView.performClick(TextView.java:10949) at android.view.View$PerformClick.run(View.java:22624) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:7407) at java.lang.reflect.Method.invoke(Native Method:0) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Hi @SecUSo

I found this app and also this one on the Google Play Store. This guy just took your source code, added some ads in it or made it payable and put it on the Store, without warning this is free software...

As you are the owner of the source code, feel free to open a request to google here to remove the false app from the Store, if it's your wish ;)

Don't forget to tell Google that:

• The app is licensed under GNU GPL v3 license and this guy is violating it;
• He is falsely claiming he made the app.

Suggestion for enhancement:
upon completion of a number, immediately mark the number button yellow (or some other colour). Currently the yellow line only appears when you press the number button again or switch to another number. This means that sometimes I'm checking all boxes to see whether they contain the number I'm working on, whereas it would be great if this could be shown visually immediately when entering the last of that particular number.

Feature request to enter own Sudokus for playing

Hello,
I've been using your app for some time and really like it. I'd really like to be able to add personal puzzles in order to be able to solve them in your neat interface.
Thanks

Phone : Wiko Ozzy
Android version : 4.2.2
App version : 2.1.1
Language : French

Scenario :

Open the application
Open a new 9*9 game

Expected behaviour :

Game is playable

Current behaviour :

Screen is broken

java.lang.RuntimeException: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2583) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2665) at android.app.ActivityThread.-wrap11(ActivityThread.java:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1499) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5765) at java.lang.reflect.Method.invoke(Native Method:0) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) Caused by: java.lang.NullPointerException: at org.secuso.privacyfriendlysudoku.ui.AboutActivity.onCreate(AboutActivity.java:23) at android.app.Activity.performCreate(Activity.java:6318) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2530)

This should be fixed for the next version.

It would be nice if the changes of version 3.0.0 were mentioned/documented in the changelog file.

esp. the NewLevelManager and QQWingGenerator has a lot of dead code now because of the restructuring.

Hi, after the last update the grill becomes so small. I miss the old look.

The font color of the "new game" and "continue game" buttons has to be white.

java.lang.IllegalStateException: at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) at android.view.View.performClick(View.java:5721) at android.widget.TextView.performClick(TextView.java:10949) at android.view.View$PerformClick.run(View.java:22624) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:7407) at java.lang.reflect.Method.invoke(Native Method:0) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.reflect.InvocationTargetException: at java.lang.reflect.Method.invoke(Native Method:0) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)

The font color of the number pad within the game should be white, too.

I recognized a constant high CPU usage, which results in a unlimited increase and harmful battery temperature. I tried to configure the app to minimalistic features but this doesn't solve the issue.

On the Fairphone 2 it takes about 5 min and on the HTC One m8 it takes about 15 min to resch > 42°C. Both devices running LineageOS 14.1

It's pity, because this is the best Sudoku app i ever played on Android and i would be totally happy to play one round without a break.

Maybe you could add an 16x16 variant?
I find the 12x12 a bit wired because the layout is not square...

EO
Mi havas peton pri motivo de la jena regulo en CONTRIBUTING.md:

Unwanted Changes:
New translations/languages

Bonvolu klarigi kiel tradukoj de la aplikaĵo kontraŭas al privateco de la uzanto.
Se vi plue decidos al rifuzi la kunfand-petojn #48 k #15, bonvolu konsideri ŝanĝi la titolon de la aplikaĵo al:
Privacy Friendly Sudoku Only For English People

——————————————————
EN (automatic translation)
I have a request for a reason for the following rule in CONTRIBUTING.md:

Unwanted Changes:
New translations / languages

Please explain how translations of the application are contrary to the user's privacy.
If you further decide to reject the merge requests #48 & #15, please consider changing the title of the application to:
Privacy Friendly Sudoku Only For English People

——————————————————
DE (automatische Übersetzung)
Ich habe eine Anfrage nach einem Grund für die folgende Regel in CONTRIBUTING.md:

Unwanted Changes:
New translations/languages

Bitte erläutern Sie, inwiefern Übersetzungen der Anwendung die Privatsphäre des Benutzers verletzen.
Wenn Sie die Zusammenführungsanforderungen #48 und #15 weiter ablehnen möchten, sollten Sie den Titel der Anwendung in Folgendes ändern:
Privacy Friendly Sudoku Only For English People

Hello, the app drains my phone's battery really fast, playing for 2 hours can drain it completely. OpenSudoku for comparison doesn't do that, so it's definitely not a device problem.

Reported from Android 6.0

java.lang.IndexOutOfBoundsException
	at android.graphics.Canvas.drawText(Canvas.java:1696)
	at android.text.Layout.drawText(Layout.java:410)
	at android.widget.Editor.drawHardwareAccelerated(Editor.java:1752)
	at android.widget.Editor.onDraw(Editor.java:1674)
	at android.widget.TextView.onDraw(TextView.java:5719)
	at android.view.View.draw(View.java:16270)
	at android.view.View.updateDisplayListIfDirty(View.java:15267)
	at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3594)
	at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3574)
	at android.view.View.updateDisplayListIfDirty(View.java:15227)
	at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3594)
	at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3574)
	at android.view.View.updateDisplayListIfDirty(View.java:15227)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.support.design.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1195)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.draw(View.java:16273)
	at android.view.View.updateDisplayListIfDirty(View.java:15267)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:1379)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.draw(View.java:16273)
	at android.view.View.updateDisplayListIfDirty(View.java:15267)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.updateDisplayListIfDirty(View.java:15262)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.updateDisplayListIfDirty(View.java:15262)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.updateDisplayListIfDirty(View.java:15262)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.updateDisplayListIfDirty(View.java:15262)
	at android.view.View.draw(View.java:16040)
	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)
	at android.view.View.draw(View.java:16273)
	at com.android.internal.policy.PhoneWindow$DecorView.draw(PhoneWindow.java:2697)
	at android.view.View.updateDisplayListIfDirty(View.java:15267)
	at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:281)
	at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:287)
	at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:322)
	at android.view.ViewRootImpl.draw(ViewRootImpl.java:2619)
	at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2438)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2071)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1111)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6017)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
	at android.view.Choreographer.doCallbacks(Choreographer.java:670)
	at android.view.Choreographer.doFrame(Choreographer.java:606)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
	at android.os.Handler.handleCallback(Handler.java:739)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:234)
	at android.app.ActivityThread.main(ActivityThread.java:5526)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

It shows only one column and controls are more working on RTL locals

After the recent updates (starting with 3.0.0 and getting worse with 3.0.1) the game becomes unplayable for me:

Here are some other screenshots …
Watch the date – level overlap:

Watch the stars overflowing the borders:

I admit, it is phone with a really small screen, but it worked with the 2.2.x series …

This is on Android 8.1 and on a Jelly Pro phone.

Hello,
When I use targetSdkVersion 26 the application works fine in my smart phone but once I change it to targetSdkVersion 28 it goes throw the tutorial and then crashed.
Any Idea about this issue?
Chaker

The navigation drawer should be analogue to https://github.com/SecUSo/privacy-friendly-app-example

Great app. It would be nice if the app would mark obvious wrong entries (e.g. same number already exists in line, column or square) and thus warn the user about them. If you say this would not be desirable for everyone because of higher/lower difficulty it could be configurable and either be on or off by default.

The top page of settings has to follow the same design as the sub pages.

java.lang.RuntimeException: at android.app.LoadedApk.makeApplication(LoadedApk.java:516) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4553) at android.app.ActivityThread.access$1500(ActivityThread.java:139) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1353) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:149) at android.app.ActivityThread.main(ActivityThread.java:5257) at java.lang.reflect.Method.invokeNative(Native Method:0) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:610) at dalvik.system.NativeStart.main(Native Method:0) Caused by: java.lang.IllegalStateException: at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:376) at android.app.LoadedApk.getClassLoader(LoadedApk.java:329) at android.app.LoadedApk.makeApplication(LoadedApk.java:508)

Hi,
I have Sudoku v2.0.1 from fdroid running on a fire tablet 7" with Android 5.1.1.

• The grid has different border sizes, sometimes gray
• The Notes are pixelated
• Numbers on the buttons are too small
• Border of the buttons in the last row are too big

Reported from Android Version 5.0 while playing in an easy level.

java.lang.RuntimeException: Unable to start activity ComponentInfo{org.secuso.privacyfriendlysudoku/org.secuso.privacyfriendlysudoku.ui.GameActivity}: java.lang.IllegalArgumentException: Saved level is does not have the correct size.
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2534)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2614)
	at android.app.ActivityThread.access$800(ActivityThread.java:178)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1470)
	at android.os.Handler.dispatchMessage(Handler.java:111)
	at android.os.Looper.loop(Looper.java:194)
	at android.app.ActivityThread.main(ActivityThread.java:5650)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:372)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)
Caused by: java.lang.IllegalArgumentException: Saved level is does not have the correct size.
	at org.secuso.privacyfriendlysudoku.controller.NewLevelManager.loadLevel(NewLevelManager.java:107)
	at org.secuso.privacyfriendlysudoku.controller.GameController.loadNewLevel(GameController.java:101)
	at org.secuso.privacyfriendlysudoku.ui.GameActivity.onCreate(GameActivity.java:119)
	at android.app.Activity.performCreate(Activity.java:6092)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481)
	... 10 more

• Stats were reported to be deleted on update
  Note: investigate issue

The required classes:
Colors: https://github.com/SecUSo/privacy-friendly-app-example/blob/master/app/src/main/res/values/colors.xml
Java Classes: https://github.com/SecUSo/privacy-friendly-app-example/tree/master/app/src/main/java/org/secuso/privacyfriendlyexample/tutorial
Activity Layout: https://github.com/SecUSo/privacy-friendly-app-example/blob/master/app/src/main/res/layout/activity_tutorial.xml
Tutorial Slides: https://github.com/SecUSo/privacy-friendly-app-example/blob/master/app/src/main/res/layout/tutorial_slide1.xml

When using chinese numbers, the number 10 is 十; 11 is 十一; and 12 is 十二.
If 10 and 11 are marked on the same square (as small numbers), the 十 on both of them overlaps perfectly, making it impossible to discern whether number 10 is there or not.