Develop Reference

How to use a bottom sheet dialog from navigation ui component

I'm using nav graph for internal navigations. Now I want to open a bottom sheet dialog fragment using nav_graph.
I tried adding
<dialog
android:id="#+id/ItemBottomSheetFragment"
android:name="xxxxxxx.fragments.InvoiceItemBottomSheetFragment"
tools:layout="#layout/fragment_invoice_item_bottom_sheet"
android:label="ItemBottomSheetFragment" />
But my app crashes when I launch it.
Crash report
2019-11-23 18:42:13.393 16111-16111/xxxxxxxxxxxxx E/AndroidRuntime: FATAL EXCEPTION: main
Process: xxxxxxxxxxxxx, PID: 16111
java.lang.RuntimeException: Unable to start activity ComponentInfo{xxxxxxxxxxxxx/xxxxxxxxxxxxx.MainActivity}: android.view.InflateException: Binary XML file line #17: Binary XML file line #17: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: android.view.InflateException: Binary XML file line #17: Binary XML file line #17: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
Caused by: java.lang.RuntimeException: Exception inflating xxxxxxxxxxxxx:navigation/nav_graph line 266
at androidx.navigation.NavInflater.inflate(NavInflater.java:90)
at androidx.navigation.NavController.setGraph(NavController.java:447)
at androidx.navigation.NavController.setGraph(NavController.java:429)
at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:226)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:2528)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:843)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1135)
at androidx.fragment.app.FragmentManagerImpl.addFragment(FragmentManagerImpl.java:1391)
at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManagerImpl.java:3123)
at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:134)
at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:360)
at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:339)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:537)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:303)
at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284)
at xxxxxxxxxxxxx.MainActivity.onCreate(MainActivity.kt:19)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
2019-11-23 18:42:13.395 16111-16111/xxxxxxxxxxxxx E/AndroidRuntime: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.IllegalStateException: Could not find Navigator with name "dialog". You must call NavController.addNavigator() for each navigation type.
at androidx.navigation.NavigatorProvider.getNavigator(NavigatorProvider.java:98)
at androidx.navigation.NavInflater.inflate(NavInflater.java:100)
at androidx.navigation.NavInflater.inflate(NavInflater.java:132)
at androidx.navigation.NavInflater.inflate(NavInflater.java:81)

Previously I was using navigation UI version 2.0.0
After upgrading to 2.1.0, it's working fine

My app keep closing in the emulator after migrate to androidx. Does anyone have solution for this?

I just migrated to androidx. For some reason, my app keeps crashing whenever I use it in the emulator. I need help
I have been searching on the Internet for hours but have not seen any solution for that. I also examine my logcat but I do not get the error
2019-10-16 18:33:11.287 7763-7763/com.example.recyclerview E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.recyclerview, PID: 7763
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.recyclerview/com.example.recyclerview.MainActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.core.widget.DrawerLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.core.widget.DrawerLayout
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class androidx.core.widget.DrawerLayout
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.widget.DrawerLayout" on path: DexPathList[[zip file "/data/app/com.example.recyclerview-gS5TXhudi0GJX8tyIujcvA==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.recyclerview-gS5TXhudi0GJX8tyIujcvA==/lib/x86, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.view.LayoutInflater.createView(LayoutInflater.java:606)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.recyclerview.MainActivity.onCreate(MainActivity.java:40)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

In the activity java and xml file with drawer layout replace androidx.core.widget.DrawerLayou with androidx.drawerlayout.widget.DrawerLayout. If you can't see it directly, use find option and search the string directly.

try to change androidx.core.widget.DrawerLayout with androidx.drawerlayout.widget.DrawerLayout

Your error message says your layout used in com.example.recyclerview.MainActivity.onCreate contains the class androidx.core.widget.DrawerLayout, but the package name for DrawerLayout is androidx.drawerlayout.widget.DrawerLayout. Correct your layout to use the right class name.

Account kit crashes in splitscreen mode

I have trouble with account kit, it crashes on entering phone number screen in split screen mode.
Im using next dependencies with last versions.
implementation 'com.facebook.android:account-kit-sdk:4.34.0'
Here is stacktrace:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.appname.dev, PID: 25576
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.appname.dev/com.facebook.accountkit.ui.AccountKitActivity}: android.view.InflateException: Binary XML file line #26: Binary XML file line #26: Error inflating class TextView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2831)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2906)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4778)
at android.app.ActivityThread.-wrap18(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1611)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:172)
at android.app.ActivityThread.main(ActivityThread.java:6637)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #26: Binary XML file line #26: Error inflating class TextView
Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class TextView
Caused by: java.lang.UnsupportedOperationException: Can't convert value at index 37 to dimension: type=0x1
at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:730)
at android.view.View.<init>(View.java:4998)
at android.widget.TextView.<init>(TextView.java:824)
at android.widget.TextView.<init>(TextView.java:818)
at android.support.v7.widget.ab.<init>(AppCompatTextView.java:76)
at android.support.v7.widget.ab.<init>(AppCompatTextView.java:72)
at android.support.v7.app.AppCompatViewInflater.a(AppCompatViewInflater.java:176)
at android.support.v7.app.AppCompatViewInflater.a(AppCompatViewInflater.java:101)
at android.support.v7.app.j.b(AppCompatDelegateImplV9.java:1035)
at android.support.v7.app.j.onCreateView(AppCompatDelegateImplV9.java:1092)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:772)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.facebook.accountkit.ui.be$a.a(TitleFragmentFactory.java:87)
at com.facebook.accountkit.ui.ai.onCreateView(LoginFragment.java:43)
at com.facebook.accountkit.ui.be$a.onCreateView(TitleFragmentFactory.java:50)
at android.app.Fragment.performCreateView(Fragment.java:2611)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1276)
at android.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1549)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1611)
at android.app.FragmentManagerImpl.dispatchMoveToState(FragmentManager.java:3039)
at android.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:2991)
at android.app.FragmentController.dispatchActivityCreated(FragmentController.java:178)
at android.app.Activity.performCreateCommon(Activity.java:6969)
at android.app.Activity.performCreate(Activity.java:6977)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2784)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2906)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4778)
at android.app.ActivityThread.-wrap18(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1611)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:172)
at android.app.ActivityThread.main(ActivityThread.java:6637)
E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Android 8.0
Xiaomi Mi A1

AuthUI.IdpConfig.EmailBuilder() inflate view error

I need to use firebase-ui-auth in my programm...
// Choose authentication providers
List providers = Arrays.asList(
new AuthUI.IdpConfig.EmailBuilder().build(),
new AuthUI.IdpConfig.GoogleBuilder().build());
// Create and launch sign-in intent
caller.startActivityForResult(
AuthUI.getInstance()
.createSignInIntentBuilder()
.setAvailableProviders(providers)
.build(),
RC_SIGN_IN);`
and function very good (I call this in my mainActivity)...
but, when I choose only: AuthUI.IdpConfig.EmailBuilder() the app crashes, because there is some problem to inflate xml...
error code:
Process: com.superena.superenaactivity, PID: 6516
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.superena.superenaactivity/com.firebase.ui.auth.ui.email.EmailActivity}: android.view.InflateException: Binary XML file line #24: Binary XML file line #24: Error inflating class android.support.design.widget.TextInputLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: android.view.InflateException: Binary XML file line #24: Binary XML file line #24: Error inflating class android.support.design.widget.TextInputLayout
Caused by: android.view.InflateException: Binary XML file line #24: Error inflating class android.support.design.widget.TextInputLayout
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.firebase.ui.auth.ui.email.CheckEmailFragment.onCreateView(CheckEmailFragment.java:89)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2335)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1423)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1754)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1822)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2591)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2378)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2333)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2240)
at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3243)
at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3195)
at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:195)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:596)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1334)
at android.app.Activity.performStart(Activity.java:7029)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2741)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
06-27 12:54:24.320 6516-6516/com.superena.superenaactivity E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.NoSuchFieldError: No static field error_color_material of type I in class Landroid/support/v7/appcompat/R$color; or its superclasses (declaration of 'android.support.v7.appcompat.R$color' appears in /data/app/com.superena.superenaactivity-reFM-WL6EH7D2KJRxYTXFw==/split_lib_slice_2_apk.apk)
at android.support.design.widget.TextInputLayout.setErrorEnabled(TextInputLayout.java:654)
at android.support.design.widget.TextInputLayout.<init>(TextInputLayout.java:257)
at android.support.design.widget.TextInputLayout.<init>(TextInputLayout.java:187)
... 40 more
with the two options it works very well; with only new AuthUI.IdpConfig.EmailBuilder().build());don't functions, if somebody can help me, please

I face same problem. Solved it by adding this
compile 'com.android.support:design:28.0.0'
into dependencies of app level gradle file.

Android Architecture Navigation component and Proguard results in java.lang.ClassNotFoundException

When running a proguard enabled build with the new android navigation component, my fragment class cannot be found. I receive this stack trace:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.myapppackage.path, PID: 24334
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapppackage.path/com.myapppackage.path.MainActivity}: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
Caused by: java.lang.RuntimeException: Exception inflating com.myapppackage.path:navigation/nav_graph line 7
at androidx.navigation.h.a(Unknown Source:124)
at androidx.navigation.c.a(Unknown Source:4)
at androidx.navigation.fragment.NavHostFragment.a(Unknown Source:88)
at android.support.v4.app.g.k(Unknown Source:15)
at android.support.v4.app.m.a(Unknown Source:382)
at android.support.v4.app.m.b(Unknown Source:7)
at android.support.v4.app.m.a(Unknown Source:74)
at android.support.v4.app.m.onCreateView(Unknown Source:216)
at android.support.v4.app.j.a(Unknown Source:4)
at android.support.v4.app.h.a(Unknown Source:2)
at android.support.v4.app.e.onCreateView(Unknown Source:0)
at android.support.v4.app.h.onCreateView(Unknown Source:0)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.j.b(Unknown Source:23)
at android.support.v7.app.c.setContentView(Unknown Source:4)
at com.myapppackage.path.MainActivity.onCreate(Unknown Source:6)
at android.app.Activity.performCreate(Activity.java:6999)
at android.app.Activity.performCreate(Activity.java:6990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.myapppackage.path.ui.start.StartFragment
at androidx.navigation.fragment.a$a.a(Unknown Source:58)
at androidx.navigation.fragment.a$a.a(Unknown Source:19)
at androidx.navigation.h.a(Unknown Source:16)
at androidx.navigation.h.a(Unknown Source:133)
at androidx.navigation.h.a(Unknown Source:31)
at androidx.navigation.c.a(Unknown Source:4) 
at androidx.navigation.fragment.NavHostFragment.a(Unknown Source:88) 
at android.support.v4.app.g.k(Unknown Source:15) 
at android.support.v4.app.m.a(Unknown Source:382) 
at android.support.v4.app.m.b(Unknown Source:7) 
at android.support.v4.app.m.a(Unknown Source:74) 
at android.support.v4.app.m.onCreateView(Unknown Source:216) 
at android.support.v4.app.j.a(Unknown Source:4) 
at android.support.v4.app.h.a(Unknown Source:2) 
at android.support.v4.app.e.onCreateView(Unknown Source:0) 
at android.support.v4.app.h.onCreateView(Unknown Source:0) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863) 
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:515) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.support.v7.app.j.b(Unknown Source:23) 
at android.support.v7.app.c.setContentView(Unknown Source:4) 
at com.myapppackage.path.MainActivity.onCreate(Unknown Source:6) 
at android.app.Activity.performCreate(Activity.java:6999) 
at android.app.Activity.performCreate(Activity.java:6990) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6494) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
Caused by: java.lang.ClassNotFoundException: com.myapppackage.path.ui.start.StartFragment
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:453)
E/AndroidRuntime: at androidx.navigation.fragment.a$a.a(Unknown Source:45)
... 38 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.myapppackage.path.ui.start.StartFragment" on path: DexPathList[[zip file "/data/app/com.myapppackage.path-yqk9eOoCoeyT3xg78oYcxg==/base.apk"],nativeLibraryDirectories=[/data/app/com.myapppackage.path-yqk9eOoCoeyT3xg78oYcxg==/lib/arm64, /system/lib64, /vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 41 more
It says it cannot find the fragment class which is defined in my nav_graph.xml file:
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.myapppackage.path.ui.start.StartFragment
My nav_graph.xml:
<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
app:startDestination="#id/start">
<fragment
android:id="#+id/start"
android:name="com.myapppackage.path.ui.start.StartFragment"
android:label="start_fragment"
tools:layout="#layout/start_fragment" />
</navigation>
As you can see the name of the fragment is set in the xml, this path seems to become invalid after running through proguard.
My only work-around so far is to define each of my fragment class paths as -keepnames in my proguard-rules.pro file. For example:
-keepnames class com.myapppackage.path.ui.start.StartFragment
After this, the obfuscated compile runs fine without crashing.
Although I'm not sure if this is correct, am I doing something wrong?
How can we use the new navigation architecture component with our obfuscated builds without defining a rule for each fragment in proguard rules?
I understand this issue may only be a problem right now because the navigation-fragment component is still in alpha.