Android 导航组件未与当前代码库合并
我在阅读导航组件、匕首和数据绑定的用法时遇到了一个问题 我在错误抛出上的堆栈跟踪是Android 导航组件未与当前代码库合并,android,dependency-injection,dagger-2,android-architecture-navigation,Android,Dependency Injection,Dagger 2,Android Architecture Navigation,我在阅读导航组件、匕首和数据绑定的用法时遇到了一个问题 我在错误抛出上的堆栈跟踪是 E/AndroidRuntime: FATAL EXCEPTION: main Process: go.ke.antifgmboard.androidapp, PID: 16021 java.lang.RuntimeException: Unable to start activity ComponentInfo{go.ke.antifgmboard.androidapp/go.ke.antifg
E/AndroidRuntime: FATAL EXCEPTION: main
Process: go.ke.antifgmboard.androidapp, PID: 16021
java.lang.RuntimeException: Unable to start activity ComponentInfo{go.ke.antifgmboard.androidapp/go.ke.antifgmboard.androidapp.ui.signup.AuthActivity}: android.view.InflateException: Binary XML file line #36 in go.ke.antifgmboard.androidapp:layout/activity_auth: Binary XML file line #36 in go.ke.antifgmboard.androidapp:layout/activity_auth: Error inflating class androidx.fragment.app.FragmentContainerView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: android.view.InflateException: Binary XML file line #36 in go.ke.antifgmboard.androidapp:layout/activity_auth: Binary XML file line #36 in go.ke.antifgmboard.androidapp:layout/activity_auth: Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: android.view.InflateException: Binary XML file line #36 in go.ke.antifgmboard.androidapp:layout/activity_auth: Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
at go.ke.antifgmboard.androidapp.viewModel.MyViewModelFactory.create(MyViewModelFactory.java:37)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:187)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:150)
at go.ke.antifgmboard.androidapp.ui.signup.LandingFragment.onCreate(LandingFragment.java:34)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:2684)
at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:280)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1175)
at androidx.fragment.app.FragmentManager.addAddedFragments(FragmentManager.java:2224)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1997)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1953)
at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1849)
at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2629)
at androidx.fragment.app.FragmentManager.dispatchCreate(FragmentManager.java:2571)
at androidx.fragment.app.Fragment.onCreate(Fragment.java:1685)
at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:264)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:2684)
at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:280)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1175)
at androidx.fragment.app.FragmentManager.addAddedFragments(FragmentManager.java:2224)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1997)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1953)
at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1818)
E/AndroidRuntime: at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:303)
at androidx.fragment.app.FragmentContainerView.<init>(FragmentContainerView.java:166)
at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:51)
at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:135)
at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:356)
at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:335)
at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1069)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:997)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:696)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)
at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:303)
at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284)
at go.ke.antifgmboard.androidapp.ui.signup.AuthActivity.onCreate(AuthActivity.java:32)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
at go.ke.antifgmboard.androidapp.util.PreferenceManager.<init>(PreferenceManager.java:12)
at go.ke.antifgmboard.androidapp.di.AppModule.providesPreferenceManager(AppModule.java:19)
at go.ke.antifgmboard.androidapp.di.AppModule_ProvidesPreferenceManagerFactory.providesPreferenceManager(AppModule_ProvidesPreferenceManagerFactory.java:37)
at go.ke.antifgmboard.androidapp.di.AppModule_ProvidesPreferenceManagerFactory.get(AppModule_ProvidesPreferenceManagerFactory.java:27)
at go.ke.antifgmboard.androidapp.di.AppModule_ProvidesPreferenceManagerFactory.get(AppModule_ProvidesPreferenceManagerFactory.java:10)
at go.ke.antifgmboard.androidapp.repository.AuthenticationRepository_Factory.get(AuthenticationRepository_Factory.java:26)
at go.ke.antifgmboard.androidapp.repository.AuthenticationRepository_Factory.get(AuthenticationRepository_Factory.java:9)
at go.ke.antifgmboard.androidapp.viewModel.AuthenticationViewModel_Factory.get(AuthenticationViewModel_Factory.java:22)
at go.ke.antifgmboard.androidapp.viewModel.AuthenticationViewModel_Factory.get(AuthenticationViewModel_Factory.java:8)
at go.ke.antifgmboard.androidapp.viewModel.MyViewModelFactory.create(MyViewModelFactory.java:35)
... 55 more
I/Process: Sending signal. PID: 16021 SIG: 9
<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/authentication_navigation"
app:startDestination="@id/navigation_landing">
<fragment
android:id="@+id/navigation_landing"
android:name="go.ke.antifgmboard.androidapp.ui.signup.LandingFragment"
android:label=""
tools:layout="@layout/fragment_landing" >
<action
android:id="@+id/action_navigation_landing_to_checkUSer"
app:destination="@id/navigation_checkUser" />
<action
android:id="@+id/action_navigation_landing_to_permissions_fragment"
app:destination="@id/navigation_permission" />
</fragment>
<fragment
android:id="@+id/navigation_checkUser"
android:name="go.ke.antifgmboard.androidapp.ui.signup.CheckUserFragment"
android:label="Input phone"
tools:layout="@layout/fragment_check_user" >
<action
android:id="@+id/action_navigation_checkuser_to_login_fragment"
app:destination="@id/navigation_Login" />
<action
android:id="@+id/action_navigation_checkuser_to_register_fragment"
app:destination="@id/navigation_Register" />
</fragment>
<fragment
android:id="@+id/navigation_Login"
android:name="go.ke.antifgmboard.androidapp.ui.signup.LoginFragment"
android:label="Input Otp"
tools:layout="@layout/fragment_login" >
<action
android:id="@+id/action_navigation_login_to_permissions_fragment"
app:destination="@id/navigation_permission" />
<action
android:id="@+id/action_navigation_login_to_image_upload"
app:destination="@id/navigation_image_upload" />
</fragment>
<fragment
android:id="@+id/navigation_Register"
android:name="go.ke.antifgmboard.androidapp.ui.signup.RegisterFragment"
android:label="Register"
tools:layout="@layout/fragment_register" >
<action
android:id="@+id/action_navigation_newsfeed_to_newsFeedPostDetailsFragment"
app:destination="@id/navigation_Login" />
</fragment>
<fragment
android:id="@+id/navigation_image_upload"
android:name="go.ke.antifgmboard.androidapp.ui.signup.RegisterFragment"
android:label="Image Upload"
tools:layout="@layout/fragment_upload_image" >
<action
android:id="@+id/action_navigation_image_upload_to_navigation_permission"
app:destination="@id/navigation_permission" />
</fragment>
<fragment
android:id="@+id/navigation_permission"
android:name="go.ke.antifgmboard.androidapp.ui.signup.PermissionsFragment"
android:label="Grant Permission"
tools:layout="@layout/fragment_permission" >
</fragment>
</navigation>
我的问题似乎源于我连接导航组件的那一点，希望你们中的一位能够提供帮助，di模块也在抱怨，但我确信，一旦基本问题得到解决，这一切都可以得到解决。尝试在
navigation.xmlstartDestinationimplementation "androidx.fragment:fragment:1.2.5"
我终于发现了我的代码有什么问题。。。最糟糕的是，它与导航错误完全无关，但是错误堆栈跟踪精确地指出了问题的根源 原因是一个空的SharedPreference管理课程让我的di陷入疯狂，这就是问题所在
public class PreferenceManager {
Context context;
String UNICEF_PREFERENCE = "UNICEF_Preference";
SharedPreferences preference;
SharedPreferences.Editor editor;
public PreferenceManager(Context context){
this.context=context;
}
preference = context.getSharedPreferences(UNICEF_PREFERENCE,Context.MODE_PRIVATE);
editor = preference.edit();
}
public class PreferenceManager {
Context context;
String UNICEF_PREFERENCE = "UNICEF_Preference";
SharedPreferences preference;
SharedPreferences.Editor editor;
public PreferenceManager(Context context){
this.context=context;
preference = context.getSharedPreferences(UNICEF_PREFERENCE,Context.MODE_PRIVATE);
editor = preference.edit();
}
}
我已经做了以上所有的。。。让我添加导航类定义
implementation "androidx.fragment:fragment:1.2.5"
public class PreferenceManager {
Context context;
String UNICEF_PREFERENCE = "UNICEF_Preference";
SharedPreferences preference;
SharedPreferences.Editor editor;
public PreferenceManager(Context context){
this.context=context;
}
preference = context.getSharedPreferences(UNICEF_PREFERENCE,Context.MODE_PRIVATE);
editor = preference.edit();
}
public class PreferenceManager {
Context context;
String UNICEF_PREFERENCE = "UNICEF_Preference";
SharedPreferences preference;
SharedPreferences.Editor editor;
public PreferenceManager(Context context){
this.context=context;
preference = context.getSharedPreferences(UNICEF_PREFERENCE,Context.MODE_PRIVATE);
editor = preference.edit();
}
}