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Code  ›  Android开发 报错: xxx does not have a NavController set on xxx_do partial code cache collection, code=61kb, data=
android开发 activity
https://blog.csdn.net/zhangjianming2018/article/details/124176921
曾深爱过的酱肘子
2 年前

在Activity的onCreate生命周期里执行下列代码,导致 xxx does not have a NavController set on xxx 报错 

I/art: Do partial code cache collection, code=57KB, data=58KB
I/art: After code cache collection, code=53KB, data=56KB
I/art: Increasing code cache capacity to 256KB
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.zjm.myapplication, PID: 6291
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zjm.myapplication/com.zjm.myapplication.footNavigation.FootNavActivity}: java.lang.IllegalStateException: Activity com.zjm.myapplication.footNavigation.FootNavActivity@23141b0 does not have a NavController set on 2131230967
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2668)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2729)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1480)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6176)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
     Caused by: java.lang.IllegalStateException: Activity com.zjm.myapplication.footNavigation.FootNavActivity@23141b0 does not have a NavController set on 2131230967
        at androidx.navigation.Navigation.findNavController(Navigation.java:61)
        at com.zjm.myapplication.footNavigation.FootNavActivity.onCreate(FootNavActivity.java:28)
        at android.app.Activity.performCreate(Activity.java:6692)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2621)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2729) 
        at android.app.ActivityThread.-wrap12(ActivityThread.java) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1480) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.app.ActivityThread.main(ActivityThread.java:6176) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783) 

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/activity_foot_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".footNavigation.FootNavActivity">
    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottomNavigationView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:menu="@menu/menu_foot_nav" />
    <androidx.fragment.app.FragmentContainerView
        android:id="@+id/fragmentContainerView2"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:defaultNavHost="true"
        app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:navGraph="@navigation/nav_graph_foot" />
</androidx.constraintlayout.widget.ConstraintLayout>
 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityFootNavBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());
        BottomNavigationView bottomNavigationView = findViewById(R.id.bottomNavigationView);
        NavController navController = Navigation.findNavController(this,R.id.fragmentContainerView2);
        AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build();
        NavigationUI.setupActionBarWithNavController(this,navController,appBarConfiguration);
        NavigationUI.setupWithNavController(bottomNavigationView,navController);

问题原因就是在onCreate生命周期里FragmentContainerView对应的NavController未构建成功.
 

很简单直接onStart生命周期里获取NavController,如下代码:
 

    @Override
    protected void onStart() {
        super.onStart();
        navController = Navigation.findNavController(this,R.id.fragmentContainerView2);

或者,将获取NavController的任务放到view创建测绘完成后在执行
 

        mBinding.fragment.post(new Runnable() {
            @Override
            public void run() {
                        navController = Navigation.findNavController(this,R.id.fragmentContainerView2);

使用getSupportFragmentManager获取
 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityFootNavBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());
        BottomNavigationView bottomNavigationView = findViewById(R.id.bottomNavigationView);
        NavHostFragment navHostFragment = (NavHostFragment)getSupportFragmentManager().findFragmentById(R.id.fragmentContainerView2);
        NavController navController = navHostFragment.getNavController();
        AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build();
        NavigationUI.setupActionBarWithNavController(this,navController,appBarConfiguration);
        NavigationUI.setupWithNavController(bottomNavigationView,navController);
                                    回复 DCloud_Android_zl:04/30 17:42:54: Launching app$ adb shell am start -n "com.hua366.lehua/io.dcloud.PandoraEntry" -a android.intent.action.MAIN -c android.intent.category.LAUNCHERClient not ready ye...
《Android开发艺术探索》作者：任玉刚 第1章 Activity的生命周期和启动模拟
https://developer.android.google.cn/guide/components/activities/activity-lifecycle.html
https://developer.
import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevic...
                                    最近发现当把xml中的标签替换为<androidx.fragment.app.FragmentContainerView>,然后在Activity的onCreate方法获取NavController,就会发生does not have a NavController set on xxxxx 的错误
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState
                                    Android Navigation 异常：java.lang.RuntimeException: Unable to start activity ComponentInfo{...MainActivity}: java.lang.IllegalStateException: Activity ***..**.MainActivity@*** does not have a NavController set on *****
问题代码如下所示：
NavController navController =
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在Activity的onCreate生命周期里执行下列代码,导致 xxx does not have a NavController set on xxx 报错
   <androidx.fragment.app.FragmentContainerView
        android:id="@+id/fragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
                                    今天使用ButtomNavigationView时build过程出现了如下错误：
java.lang.RuntimeException: 
Unable to start activity ComponentInfo{XXActivity}: 
java.lang.IllegalStateException: Activity XXActivity@198a72 does not have a NavController set on 2131230893       
说没有找到controller，但
 <androidx.fragment.app.FragmentContainerView
        android:id="@+id/nav_host_fragment"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_
                                    在Android的应用开发过程中，总是需要将一系列的数据进行列表式展示。这个时候最常用到的控件就是ListView了，这个控件是很多Android初学者（包括笔者也是，很长时间之后才弄明白的）都感觉比较难掌握的。本文就来梳理一下有关ListView开发的点点滴滴，希望对于初学Android编程的朋友有帮助。一个原始而简单的例子首先，我们看下关于ListView的简单使用方式。我们现在想要在ListV
 
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