B4A Library AppCompat - Make Material Design apps compatible with older Android versions

This library is a wrapper for the Google AppCompat v7 support library.

B4A V6.0 or newer is required!
From V3.52 on B4A V6.80 or newer is required! If you still use B4A < V6.80, use V3.51 of this library.

The main reason for this library is to make your apps compatible with older Android versions and to use features in old Android versions which were implemented in newer Android releases. One big advantage of this library is that you can bring Material Design to pre Lollipop Android devices.

Setting up the library
Note: Please, Please read these instructions carefully. AppCompat depends on many things like a special theme with special features. Even special versions of build tools are required and last but not least there are often bugs in the Google support libraries.

I created this instructions to help you getting things ready for using AppCompat. So please follow these instructions carefully and all should work as expected and you don't have to ask in the forum.

Thanks.

The library uses the Android Support Repository. Please install it from the Extras Section of the Android SDK Manager. If you upgrade from an earlier release you can deinstall the "Android Support Library" since it is outdated and marked as obsolete in the Android SDK.
  1. First copy the AppCompat.jar, AppCompat.aar and AppCompat.xml files to your additional libraries folder.
  2. Start the Android SDK-Manager and download/update the latest Extras->Android Support Repository. Use at least support repository 36!
  3. In Android SDK-Manager be sure that the "Android SDK Build-tools" 25.x.x is installed! Deinstall all versions prior to version 25! If you leave older versions than 23.0.3 of build tools installed, your compiled app may work on Android 5.0 and above but it will fail on older Android versions like KitKat.
  4. In the B4A IDE in your projects check the AppCompat library on the libraries tab.
  5. Make sure that you reference the latest android.jar in the IDE under the "Tools/Configure Paths" menu. Don't worry. The android.jar is only used for compilation. It does not mean that you can't run your app on lower Android Versions. The Support libraries require to compile against the same API version as the library itself. So for Support library 25.xx which is the current now you should compile with API25 android.jar.
  6. If you are updating from a version older than v3.20 then remove the b4a_appcompat resource folder delivered with older versions of this library.
To use the AppCompat library your activities MUST extend android.support.v7.app.AppCompatActivity (extending the old android.support.v7.app.ActionBarActivity still works.)

B4X:
 #Extends: android.support.v7.app.AppCompatActivity

Additionally you MUST use one of the AppCompat themes like Theme.AppCompat. You can set it directly in the manifest editor or create your own theme that has an AppCompat theme as its parent. The easiest way is to set the AppCompat theme in the manifest:

B4X:
SetApplicationAttribute(android:theme, "@style/Theme.AppCompat")

If you have upgraded this library from an older version than 3.20 then you have to remove the #AdditionalRes: attribute related to the AppCompat library from your projects. They are not needed anymore.

Some Tutorials for this library
Material Design 2 - Using the AppCompat library
Material Design 3 - Using a ToolBar as ActionBar
Material Design 4 - Modifyable and advanced Menu

Troubleshooting Guide
Because it is not so easy to setup this library I will try to give a troubleshooting guide here for the most common problems.

1. Compile always with the newest android.jar file. This can be configured in the IDE under "Tools/Configure Paths". Download the latest platform version with the SDK Manager and configure it with the IDE. Don't worry, your app will still run on older platform versions. AppCompat support library needs this only at compile time.

2. Be sure you have a correct theme file for your project. If the app seems to crash immediately without a stack trace it is most probably a problem with the theme file.

3. If you post your issue in the forum please provide the stack trace of the error! And before you post, please do a forum seach. Most probably the same error was previously reported by another user. If you don't see a stack trace in the log window, please try the unfiltered logs. Unfortunately most errors only show when you have your device connected via USB in the unfiltered logs.

4. If you post your issue in the forum please provide as many information as possible. The error you receive, screenshots if possible and most important: the stack trace.

Your support:
Creating libraries and wrappers for existing library projects is a lot of work. The use of this library is totally free and you even don't need to mention in your app that you use it.
But if you use this library in your projects and you think it is useful to you please consider to make a donation:

Thanks very much for your support.

Version History

V1.00
  • Object AppCompat - Utilities which are useful for working with AppCompat
  • Object ACActionBar - Like StdActionBar or StdActionBarHelper to control some features of the ActionBar.
  • Object ACEditText - Replacement for EditText with Material Design colors.
  • Object ACCheckBox - Replacement for CheckBox with Material Design colors.
  • Object ACRadioButton - Replacement for RadioButton with Material Design colors.
  • Object ACSwitch - Wrapper for a Switch.
  • Object ACFlatButton - Borderless Button for Dialogs etc.
V1.10
  • New object ACToolBarLight - Toolbar for light themes
  • New object ACToolBarDark - Toolbar for dark themes
  • New object ACActionMenu - Create action menus (action items and/or overflow menu everywhere in your layout. (The view needs to have a minimum width of 56dip to work properly. This seems to be a bug and hopefully will change in later versions of the AppCompat library)
  • New object ACActionModeWrapper - Change ActionBar/Toolbar to an ActionMode ActionBar. Mostly used for multiselect lists.
  • New object ACMenu - Access and modify the ActionMode, ActionMenu or Toolbar menus.
  • New object ACMenuItem - Access and modify the ActionMode, ActionMenu or Toolbar menu items.
  • New object ACPopupMenu - Implements a popup menu.
  • New object ACSearchView - Add a search view to your ActionBar/Toolbar
  • Add: AppCompat object has new methods for getting height of system components like StatusBar, ActionBar and NavigationBar.
  • Add: AppCompat object has a new method for setting the elevation of every view. With this all views (like Panels) can cast shadows. Unfortunately the shadow is only visible on Android 5.0 or above.
V2.00
  • #Extends: android.support.v7.app.AppCompatActivity should now be used (ActionBarActivity still works)
  • New object ACSpinner - AppCompat Spinner with additional support to show an icon in front of the text.
  • New object ACSubMenu - Adding Submenus to menus.
  • New Event ACSearchView_QueryChanged
  • Some internal changes (xml files for Views are not needed anymore)
  • Support for tinting Drawables.
  • Possibility to set a click effect to any view - This is experimental. It should add a ripple effect in Lollipop and above and a color change in previous versions.
  • To update from V1.xx to V2.00 delete the b4a_appcompat resource folder and copy the new one from the archive. The old xml files for buttons, edittext etc. are not needed anymore. Now there is only one xml for the spinner needed.
V3.00
  • Requires B4A 6.0 or above
  • References AppCompat from Maven repository
  • Full designer custom properties support for all views
  • Fix: ACRadioButton now supports grouping in a panel
  • Desupport of the Activity Entry animation.
  • New: ACSeekbar
  • Fix: ACSearchview closed() event does not fire (AppCompat bug). Added workaround for this.
  • Fix: Fixed several minor and major bugs
  • New example App which shows main features
V3.01

  • Fix: additionally depends on com.android.support:support-v4 which should make it work better if you mix old and new libraries.
  • Fix: ACSearchview_Closed event will not crash on API < 12 but it will not fire on these devices. Sorry, there is no workaround for this.
V3.20
  • Moved resource files to aar library file - see new setup instructions
  • Fix: ACButton ButtonColor attribute now works on all Android versions.
V3.30
  • Fix: Remove log output from ACSpinner
  • Fix: Hopefully fixed crashes with missing designer properties
  • Fix: Mixed case Eventnames in Toolbars now working
  • New: Support for ActionViews in MenuItems (Needed for CustomViews in NavigationView of DesignSupport library)
  • Change: Minimum Support Repository 36
V3.41:
  • Fix: Change packagename to anywheresoftware.b4a.orbjects to reduce resouce fields
V3.42:
  • Fix: ToolBars should raise their events correctly again.
V3.50:
  • New: Support for CharSequences wherever possible.
V3.51
  • Fix: Getters return String instead of CharSequence again to avoid problems.
V3.52
  • Fix: Compiled against B4A 6.80 Core library to avoid some problems with CharSequences.
V4.00
  • Change: Compiled against 28.0.0 Support library
  • New: Styles for most Views
 

Attachments

  • AppCompatBaseExample3_20.zip
    10.9 KB · Views: 3,507
  • AppCompatLib3_51.zip
    87.2 KB · Views: 1,507
  • AppCompatLib3_52.zip
    87.3 KB · Views: 3,386
  • AppCompatLib4_00.zip
    181.8 KB · Views: 2,888
Last edited by a moderator:

Lildinti

Member
Licensed User
Hi Corwin,
Love the library but have a question: How do you define other items in the theme? For example primary text color, divider color, etc?
If I add them to the manifest, compilation gives error:

Generating R file. Error
res\values\theme.xml:7: error: Error: No resource found that matches the given name: attr 'colorTextPrimary'.


Any thoughts?
Thanks heaps

lildinti
 

Fusseldieb

Active Member
Licensed User
Hi corwin42, could you please post the older appcompact library version? i dont have the b4a 6.0, and i realy need the second version of it.... thanks
 

chrjak

Active Member
Licensed User
I am wondering if it is possible to set the click effect to a view but keep its background drawable...
 

dragonguy

Active Member
Licensed User
is it we can add control ACSwitch into ACMenuItem?

like below screenshot
 

Attachments

  • IMG_20170201_163523.jpg
    IMG_20170201_163523.jpg
    26.4 KB · Views: 130

GGSoft

Member
Licensed User
V3.41:
  • Fix: Change packagename to anywheresoftware.b4a.orbjects to reduce resouce fields

Since V3.41 I can not get
B4X:
Sub Activity_Create(FirstTime As Boolean)
    ...
    ActionBar.InitMenuListener
End Sub

...

Sub ActionBar_NavigationItemClick
    ...
    ' Any stuff here
End Sub

to work i.e. "Up" button does not respond when no menu is present.

Until V3.30 it worked perfectly. Can it be a side effect?

Best regards.
 

corwin42

Expert
Licensed User
to work i.e. "Up" button does not respond when no menu is present.

Until V3.30 it worked perfectly. Can it be a side effect?

Thanks for reporting. Indeed this is a bug caused by an internal change. I will fix it as soon as possible.
 

kelevra1602

Member
Licensed User
In b4a v6.8, I get the following error when
Compile the app AppCompatBaseExample3_20

B4X:
java.lang.NoSuchMethodError: No virtual method setText(Ljava/lang/Object;)V in class Lde/amberhome/objects/appcompat/ACButtonWrapper; or its super classes (declaration of 'de.amberhome.objects.appcompat.ACButtonWrapper' appears in /data/app/de.amberhome.appcompat.basicexample-1/base.apk)
 

corwin42

Expert
Licensed User
In b4a v6.8, I get the following error when
Compile the app AppCompatBaseExample3_20

B4X:
java.lang.NoSuchMethodError: No virtual method setText(Ljava/lang/Object;)V in class Lde/amberhome/objects/appcompat/ACButtonWrapper; or its super classes (declaration of 'de.amberhome.objects.appcompat.ACButtonWrapper' appears in /data/app/de.amberhome.appcompat.basicexample-1/base.apk)

Yes. I expected these problems with B4A 6.80. It is because some of the AppCompat Views extend TextViewWrapper and the signature of some methods in this class changed because of the new CharSequence feature. I will update the library very soon.
 
Last edited:

corwin42

Expert
Licensed User
In b4a v6.8, I get the following error when
Compile the app AppCompatBaseExample3_20

B4X:
java.lang.NoSuchMethodError: No virtual method setText(Ljava/lang/Object;)V in class Lde/amberhome/objects/appcompat/ACButtonWrapper; or its super classes (declaration of 'de.amberhome.objects.appcompat.ACButtonWrapper' appears in /data/app/de.amberhome.appcompat.basicexample-1/base.apk)

Please try V3.52 of this library. It should fix the problem.
 

kelevra1602

Member
Licensed User
Thanks for the update so fast, ACButton works fine, but now I have this error
B4X:
config_activity_create (java line: 392)
java.lang.NoSuchMethodError: No virtual method setText(Ljava/lang/Object;)V in class Lde/amberhome/objects/appcompat/ACEditTextWrapper; or its super classes (declaration of 'de.amberhome.objects.appcompat.ACEditTextWrapper' appears in /data/app/Us.InsEncues.com-2/base.apk)
    at de.amberhome.objects.FloatlabelEditTextWrapper.setText(FloatlabelEditTextWrapper.java:188)
    at Us.InsEncues.com.config._activity_create(config.java:392)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:179)
    at Us.InsEncues.com.config.afterFirstLayout(config.java:102)
    at Us.InsEncues.com.config.access$000(config.java:17)
    at Us.InsEncues.com.config$WaitForLayout.run(config.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:135)
    at android.app.ActivityThread.main(ActivityThread.java:5258)
    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:974)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:769)
 

corwin42

Expert
Licensed User
Thanks for the update so fast, ACButton works fine, but now I have this error
Did you update DesignSupport library, too? FloatlabelEditText is in the DesignSupport library which is also updated.
 

SandroB4A

Member
Licensed User
Hello,
I just installed B4A 6.5 and downloaded sdk tools, and I have NOT problems!:D

But may be instructions on the first page must be updated, with last release of sdk the paths seem to be different, and also libraries name:

Support.png


Appcompact-V7.png


Appcompact-V7 sub.png


In my case I simply copied the appcompat lib (3.51 as I use B4A 6.5), pointed to the last android.jar (25) and all was fine! this is my sdk config.

SDK.png
 
Last edited:

corwin42

Expert
Licensed User
Hello,
I just installed B4A 6.5 and downloaded sdk tools, and I have NOT problems!:D

But may be instructions on the first page must be updated, with last release of sdk the paths seem to be different, and also libraries name:

Which part should be updated in your opinion? I think everything in the instructions is still correct.
 

SandroB4A

Member
Licensed User
corwin42 you're right, in the first post there are no indications about paths and instructions are still correct.

I had in mind all the problems encountered by users in later posts where the tip was often: "Copy android-support-v4.jar and android-support-v7-appcompat.jar to support lib" .

Now that procedure is not longer necessary, correct?
 

corwin42

Expert
Licensed User
Now that procedure is not longer necessary, correct?

Yes. There is no need to copy any support library jar to the customlibs folder anymore.
Since B4A 6.0 the maven repository for the support libraries is used.
 

JNG

Member
Licensed User
Yesterday I updated to library ver 3.51(I am using B4A 6.50) and also the latest design support lib I got the following error; Earlier working fine.

Compiling generated Java code. Error
B4A line: 558
TabLayout.SetViewPager(VP)
javac 1.8.0_66
src\b4A\joinme\mainevent.java:3822: error: incompatible types: AHViewPager cannot be converted to ViewPager
mostCurrent._tablayout.SetViewPager(mostCurrent._vp);

regard
jng
 
Top