Develop Reference

RecyclerView Class android.support.v7.recyclerview.R$styleable can not be found

I'm using RecyclerView on my app, but at runtime app crashes and my logcat reads:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.recyclertest/com.example.recyclertest.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class android.support.v7.widget.RecyclerView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
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:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class android.support.v7.widget.RecyclerView
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
at android.app.Activity.setContentView(Activity.java:2145)
at com.example.recyclertest.MainActivity.onCreate(MainActivity.java:20)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.recyclertest.MainActivity.onCreate(MainActivity.java:20)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.a
ndroid.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/recyclerview/R$styleable;
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:434)
at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:404)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.recyclertest.MainActivity.onCreate(MainActivity.java:20)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.recyclerview.R$styleable" on path: DexPathList[[zip file "/data/app/com.example.recyclertest-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
            at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:434)
            at android.support.v7.widget.RecyclerView.<init>(RecyclerView.java:404)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.recyclertest.MainActivity.onCreate(MainActivity.java:20)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Suppressed: java.lang.ClassNotFoundException: android.support.v7.recyclerview.R$styleable
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 27 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
I added android-support-v7-cardview, android-support-v7-gridlayout,
android-support-v7-recyclerview and android-support-v7-appcompat
to my project.
I'm using intellij idea
a on API Level 22

You need to clear recyclerview lib project and build it again. Then build your app. Now class must be found.

I am still using Eclipse, not Intellij, but it might help you, as I stumbled across this very error today after upgrading to the latest version of the support library.
I used to just have the recyclerview jar copied into my project;s lib folder and added to dependencies. Apparently this was not the right way anymore. I had to re-add the library as "library with resources" - pretty much the same way as the cardview library needs to be added.
For Eclipse I just followed the instructions at https://developer.android.com/tools/support-library/setup.html from the "Adding libraries with resources" section. FWIW I had to mark the newly added recyclerview as being a library during the import process (the default is not and this step was skipped in the instructions).
I hope it helps!

I also got a similar error a while back.
Make sure that you are not using
<RecyclerView>
tag as it is in your code, and using
<android.support.v7.widget.RecyclerView>
and that your build.gradle file has the following code
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:22.2.1'
compile 'com.android.support:cardview-v7:22.2.1'
compile 'com.android.support:recyclerview-v7:22.2.1'}
Taking care of these two things fixed the error for me.
If in your case you have done anything else, then please share your code so that I can point to the cause of the error.

I had the save error. After half of an hour I discovered, that recyclerview was not marked as "Library module" in project structure. This setting solved the problem

I encountered the same error today.
I Opened my project structure -> Modules.
Expand the module and select the Android option.
Set the support libraries modules as "Library Module" then it worked
I hope it helps
Project Structure screen shot

After hours of battling this (and trying literally every solution online, what worked for me was:
Close AndroidStudio
Push project to remote
Delete project from local
Clone project again and run
Somehow, the local project got "corrupted"

Snackbar InflateException in Design Support Library 22.2.1

I'm trying to use the Snackbar from the Design Support Library 22.2.1 and I'm getting an InflateException.
This is how I'm using it:
Snackbar.make(searchQueryButton, "Hello world", Snackbar.LENGTH_LONG).show();
And this is the exception:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.android.search.test_app/com.myapp.android.search.test_app.MainActivity}: android.view.InflateException: Binary XML file line #18: Error inflating class android.support.design.widget.Snackbar$SnackbarLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2339)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: android.view.InflateException: Binary XML file line #18: Error inflating class android.support.design.widget.Snackbar$SnackbarLayout
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.support.design.widget.Snackbar.<init>(Snackbar.java:127)
at android.support.design.widget.Snackbar.make(Snackbar.java:148)
at com.myapp.android.search.test_app.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:6010)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
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:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.support.design.widget.Snackbar.<init>(Snackbar.java:127)
at android.support.design.widget.Snackbar.make(Snackbar.java:148)
at com.myapp.android.search.test_app.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:6010)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: android.view.InflateException: Binary XML file line #34: Error inflating class TextView
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at android.support.design.widget.Snackbar$SnackbarLayout.<init>(Snackbar.java:534)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.support.design.widget.Snackbar.<init>(Snackbar.java:127)
at android.support.design.widget.Snackbar.make(Snackbar.java:148)
at com.myapp.android.search.test_app.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:6010)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5343)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.RuntimeException: Failed to resolve attribute at index 13
at android.content.res.TypedArray.getDrawable(TypedArray.java:747)
at android.view.View.<init>(View.java:3742)
at android.widget.TextView.<init>(TextView.java:637)
at android.widget.TextView.<init>(TextView.java:632)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:44)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:40)
at android.support.v7.internal.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:103)
at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:806)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:836)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at android.support.design.widget.Snackbar$SnackbarLayout.<init>(Snackbar.java:534)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.support.design.widget.Snackbar.<init>(Snackbar.java:127)
            at android.support.design.widget.Snackbar.make(Snackbar.java:148)
            at com.myapp.android.search.test_app.MainActivity.onCreate(MainActivity.java:60)
            at android.app.Activity.performCreate(Activity.java:6010)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
            at android.app.ActivityThread.access$800(ActivityThread.java:155)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5343)
            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:905)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Any ideas on how to fix this? Is this an issue from the library?
BTW, I'm running it on Lollipop 5.1 and I have all my activities extending from AppCompatActivity with the proper theme.
EDIT:
I realised that the theme is the problem. If I make my activity use Theme.AppCompat.Light.NoActionBar, it works as expected.
However, if I use my own theme (which overrides Theme.AppCompat.Light.NoActionBar), it throws the exception I described above.
This is my theme:
<style name="Theme.MLTheme" parent="#style/Theme.AppCompat.Light.NoActionBar">
<item name="android:windowBackground">#color/background_color</item>
<item name="android:windowActionModeOverlay">true</item>
<item name="vpiCirclePageIndicatorStyle">#style/CustomCirclePageIndicator</item>
<item name="android:actionMenuTextColor">#color/gray_dark</item>
<item name="actionBarTabBarStyle">#style/Widget.MLTheme.ActionBar</item>
<item name="actionBarStyle">#style/Widget.MLTheme.ActionBar</item>
<item name="actionBarTabStyle">#style/Widget.MLTheme.ActionBar.TabView</item>
<item name="actionBarTabTextStyle">#style/Widget.MLTheme.ActionBar.TabText</item>
<item name="android:buttonStyle">#style/MLButton.Primary</item>
<item name="buttonBarButtonStyle">#style/MLButton.Primary</item>
<item name="android:textViewStyle">#style/textview_default</item>
<item name="android:progressBarStyle">#style/Widget.MyApp.ProgressBar.Horizontal</item>
<item name="android:progressBarStyleHorizontal">#style/Widget.MyApp.ProgressBar.Horizontal</item>
<item name="android:progressBarStyleLarge">#style/Widget.MyApp.ProgressBar.Horizontal</item>
<item name="android:scrollViewStyle">#style/Widget.ScrollView.Default</item>
<item name="drawerArrowStyle">#style/DrawerArrowStyle</item>
<item name="colorAccent">#color/blue</item>
<item name="android:actionBarSize">#dimen/abc_action_bar_default_height_material</item>
<item name="android:colorPressedHighlight">#color/selection_color</item>
<item name="android:colorLongPressedHighlight">#color/selection_color</item>
<item name="android:spinnerItemStyle">#style/MLSpinnerItem</item>
<item name="android:listSeparatorTextViewStyle">#style/MLPreference.ListHeader</item>
<item name="android:dropDownItemStyle">#style/MLDropDownItemStyle</item>
<item name="actionBarItemBackground">?attr/selectableItemBackgroundBorderless</item>
<!-- for native ActionBar -->
<item name="android:actionBarItemBackground">?attr/selectableItemBackgroundBorderless</item>
<item name="selectableItemBackground">?attr/selectableItemBackground</item>
</style>
EDIT 2:
I found that if I remove the last entry in my theme, everything works as expected again.
<item name="selectableItemBackground">?attr/selectableItemBackground</item>
Does anyone know why this is causing the exception? And also, does anyone know how to replace that entry to achieve the same effect by keeping the Snackbar working?
Thank you.

Ok, I finally solved the issue by changing this:
<item name="selectableItemBackground">?attr/selectableItemBackground</item>
... to this:
<item name="selectableItemBackground">?android:attr/selectableItemBackground</item>
I suspect that if you upgrade AppCompat to 22.2.1, you also have to change that attribute.

integrate facebook login with android app

Hi I am trying to integrate facebook login with my android application. I have created an app on facebook and have added the app id to my strings.xml I have also set the following permissions in my manifest file
<uses-permission android:name="android.permission.INTERNET" />
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="#string/facebook_app_id"/>
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="#android:style/Theme.Translucent.NoTitleBar"
android:label="#string/app_name" />
I have also added the key hash to my facebook developer console and I have added the login button to my xml file.
<com.facebook.login.widget.LoginButton
android:id="#+id/fb_login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
android:layout_marginBottom="30dp" />
When I try to run the app it fails with the following error
java.lang.ExceptionInInitializerError
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at com.savale.dejalearn.BaseActivity.actionBarInit(BaseActivity.java:96)
at com.savale.dejalearn.BaseActivity.onCreate(BaseActivity.java:83)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
at android.app.ActivityThread.access$900(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
Caused by: null
at com.facebook.internal.Validate.sdkInitialized(Validate.java:99)
at com.facebook.FacebookSdk.getCallbackRequestCodeOffset(FacebookSdk.java:735)
at com.facebook.internal.CallbackManagerImpl$RequestCodeOffset.toRequestCode(CallbackManagerImpl.java:109)
at com.facebook.login.widget.LoginButton.<clinit>(LoginButton.java:58)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.savale.dejalearn.BaseActivity.actionBarInit(BaseActivity.java:96)
            at com.savale.dejalearn.BaseActivity.onCreate(BaseActivity.java:83)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
            at android.app.ActivityThread.access$900(ActivityThread.java:147)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
This error occurs when the layout which has the login button is inflated. It just says null which is making it difficult for me to debug this error. Any help will be appreciated.
Thanks

You need to call FacebookSdk.sdkInitialize(context) before using any SDK features.

Google Maps for Business crashing app with R$styleable NoClassDefFoundError

Converting one of my apps over to use the new Google Maps for Business package and now I am stuck with a crash every time our activity attempts to call setContentView() in our onCreate() method.
build.gradle:
dependencies {
// external dependencies: will need network connection if not already cached
compile 'com.google.android.gms:play-services:6.5.87'
compile 'com.android.support:support-v4:21.0.3'
// local dependencies: jar libraries checked into source control
compile files('libs/resty-0.3.4.jar')
compile files('libs/robospice-1.4.9.jar')
compile files('libs/robospice-cache-1.4.9.jar')
compile files ('libs/maps_m4b-2.12.0.rc1.jar')
}
activity_location.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.m4b.maps.MapFragment" />
Crash:
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/m4b/maps/R$styleable;
at com.google.android.m4b.maps.GoogleMapOptions.createFromAttributes(GoogleMapOptions.java:428)
at com.google.android.m4b.maps.MapFragment.onInflate(MapFragment.java:408)
at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2115)
at android.app.Activity.onCreateView(Activity.java:5282)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:916)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:802)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
at android.app.Activity.setContentView(Activity.java:2144)
at com.nate.android.hammerhead.LocationActivity.onCreate(LocationActivity.java:106)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.m4b.maps.R$styleable" on path: DexPathList[[zip file "/data/app/com.nate.android.hammerhead-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
            at com.google.android.m4b.maps.GoogleMapOptions.createFromAttributes(GoogleMapOptions.java:428)
            at com.google.android.m4b.maps.MapFragment.onInflate(MapFragment.java:408)
            at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2115)
            at android.app.Activity.onCreateView(Activity.java:5282)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.parseInclude(LayoutInflater.java:916)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:802)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
            at android.app.Activity.setContentView(Activity.java:2144)
            at com.nate.android.hammerhead.LocationActivity.onCreate(LocationActivity.java:106)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Suppressed: java.lang.ClassNotFoundException: com.google.android.m4b.maps.R$styleable
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 28 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
I have followed the guide provided by Google (https://developers.google.com/maps/documentation/business/mobile/android/) and what should have been a simple swap for the new static jar library has turned into a configuration nightmare trying to track this down to little or no avail.

How did you import the jar file?
First you need to unzip the downloaded zip file, and copy the Jar files from the google-maps-sdk-m4b_lib -> libs folder to Android Studio's libs folder.
See the below image for the completed Jar files path:

After working with a Google representative it appears that this was an issue with the *.jar package for the current 2.12.0.rc1 version.

Android Studio OutOfMemoryError

I have made an app and have been testing it on Android Studio with different screen sizes (AVDs). I started with small one and worked my way up. It is very slow, but I got up to 5.96" screens and everything worked fine. When trying it with the 5.96" I got the following error:
01-01 11:59:09.226 1317-1317/com.luanca.charangomaster E/art﹕ Throwing OutOfMemoryError "Failed to allocate a 29833456 byte allocation with 4194304 free bytes and 12MB until OOM"
01-01 11:59:09.228 1317-1317/com.luanca.charangomaster D/skia﹕ --- allocation failed for scaled bitmap
01-01 11:59:09.232 1317-1317/com.luanca.charangomaster D/AndroidRuntime﹕ Shutting down VM
--------- beginning of crash
01-01 11:59:09.246 1317-1317/com.luanca.charangomaster E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.luanca.charangomaster, PID: 1317
android.view.InflateException: Binary XML file line #1: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
at android.app.Dialog.setContentView(Dialog.java:490)
at com.luanca.charangomaster.CustomDialog.<init>(CustomDialog.java:25)
at com.luanca.charangomaster.ChordActivity$2.onClick(ChordActivity.java:178)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
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:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
            at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
            at android.app.Dialog.setContentView(Dialog.java:490)
            at com.luanca.charangomaster.CustomDialog.<init>(CustomDialog.java:25)
            at com.luanca.charangomaster.ChordActivity$2.onClick(ChordActivity.java:178)
            at android.view.View.performClick(View.java:4756)
            at android.view.View$PerformClick.run(View.java:19749)
            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:5221)
            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:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 29833456 byte allocation with 4194304 free bytes and 12MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:973)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2423)
at android.content.res.Resources.loadDrawable(Resources.java:2330)
at android.content.res.TypedArray.getDrawable(TypedArray.java:749)
at android.view.View.<init>(View.java:3730)
at android.view.ViewGroup.<init>(ViewGroup.java:491)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:248)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:244)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:240)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)
            at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)
            at android.app.Dialog.setContentView(Dialog.java:490)
            at com.luanca.charangomaster.CustomDialog.<init>(CustomDialog.java:25)
            at com.luanca.charangomaster.ChordActivity$2.onClick(ChordActivity.java:178)
            at android.view.View.performClick(View.java:4756)
            at android.view.View$PerformClick.run(View.java:19749)
            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:5221)
            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:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Now I'm confused, because the app worked with all other screen sizes. Anyone with some insight in how to fix this? Is it a code error or is it something I have to fix in Android Studio?
Works fine with 7" and 10" screens too. I don't understand the error with 5.96"...
This is where it happens. When I press one of the first 2 buttons (which should open a dialog while still on the same activity (as links because I reach limit of stackoverflow):
https://dl.dropboxusercontent.com/u/43384650/activity_main.xml
And the 2 dialogs:
https://dl.dropboxusercontent.com/u/43384650/dialog.xml
https://dl.dropboxusercontent.com/u/43384650/dialog2.xml

the drawable wood
i hope its an image and just
replace some color code to this line n try
android:background="#drawable/wood"
as
android:background="#000000"
i hope its work for u.

I ran into the same issue, and fixed it by increasing the VM Heap Size of the AVD from 64 MB to 128 MB.