Android studio IllegalArgumentException:ID未引用此活动内的视图
我一直在尝试为我的应用程序制作一个主页，其中包含一些现代化的仪表板和导航抽屉。 在我的代码中发现错误：Android studio IllegalArgumentException:ID未引用此活动内的视图,android-studio,nullpointerexception,android-actionbar,illegalargumentexception,Android Studio,Nullpointerexception,Android Actionbar,Illegalargumentexception,我一直在尝试为我的应用程序制作一个主页，其中包含一些现代化的仪表板和导航抽屉。 在我的代码中发现错误： E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.thinkerlab, PID: 13956 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.thinkerlab/com.example.thi
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.thinkerlab, PID: 13956
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.thinkerlab/com.example.thinkerlab.HomePage}: java.lang.IllegalArgumentException: ID does not reference a View inside this Activity
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2517)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2577)
at android.app.ActivityThread.access$1000(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1414)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5619)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:737)
Caused by: java.lang.IllegalArgumentException: ID does not reference a View inside this Activity
at androidx.core.app.ActivityCompat.requireViewById(ActivityCompat.java:368)
at androidx.navigation.Navigation.findNavController(Navigation.java:58)
at com.example.thinkerlab.HomePage.onCreate(HomePage.java:70)
at android.app.Activity.performCreate(Activity.java:6351)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1114)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2470)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2577)
at android.app.ActivityThread.access$1000(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1414)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5619)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:737)
<?xml version="1.0" encoding="utf-8"?>
package com.example.thinkerlab;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.Menu;
import android.widget.Toast;
import com.google.android.material.navigation.NavigationView;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.core.view.GravityCompat;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
public class HomePage extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
DrawerLayout drawerLayout;
NavigationView navigationView;
Toolbar toolbar;
ActionBar actionBar;
Activity activity;
private AppBarConfiguration mAppBarConfiguration;
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page);
toolbar = findViewById(R.id.toolbar2);
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.nav_view);
Menu menu=navigationView.getMenu();
menu.findItem(R.id.nav_Log_out).setVisible(true);
menu.findItem(R.id.nav_Profile).setVisible(true);
navigationView.bringToFront();
ActionBarDrawerToggle toggle= new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
navigationView.setNavigationItemSelectedListener(this);
navigationView.setCheckedItem(R.id.nav_home);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
mAppBarConfiguration = new AppBarConfiguration.Builder(
R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
.setDrawerLayout(drawerLayout)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
NavigationUI.setupWithNavController(navigationView, navController);
}
public void onBackPressed()
{
if(drawerLayout.isDrawerOpen(GravityCompat.START))
{
drawerLayout.closeDrawer(GravityCompat.START);
}
else
{
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home_page, menu);
return true;
}
@Override
public boolean onSupportNavigateUp() {
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
return NavigationUI.navigateUp(navController, mAppBarConfiguration)
|| super.onSupportNavigateUp();
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId())
{
case R.id.nav_home:
break;
case R.id.nav_Science:
startActivity(new Intent(HomePage.this,Page1.class));
break;
case R.id.nav_Contact_Us:
Toast.makeText(this,"Share",Toast.LENGTH_SHORT).show();
break;
case R.id.nav_Log_out:
startActivity(new Intent(HomePage.this,MainActivity.class));
break;
}
drawerLayout.closeDrawer(GravityCompat.START);
return true;
}
}
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<?xml version="1.0" encoding="utf-8"?>
package com.example.thinkerlab;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.Menu;
import android.widget.Toast;
import com.google.android.material.navigation.NavigationView;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.core.view.GravityCompat;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
public class HomePage extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
DrawerLayout drawerLayout;
NavigationView navigationView;
Toolbar toolbar;
ActionBar actionBar;
Activity activity;
private AppBarConfiguration mAppBarConfiguration;
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page);
toolbar = findViewById(R.id.toolbar2);
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.nav_view);
Menu menu=navigationView.getMenu();
menu.findItem(R.id.nav_Log_out).setVisible(true);
menu.findItem(R.id.nav_Profile).setVisible(true);
navigationView.bringToFront();
ActionBarDrawerToggle toggle= new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
navigationView.setNavigationItemSelectedListener(this);
navigationView.setCheckedItem(R.id.nav_home);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
mAppBarConfiguration = new AppBarConfiguration.Builder(
R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
.setDrawerLayout(drawerLayout)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
NavigationUI.setupWithNavController(navigationView, navController);
}
public void onBackPressed()
{
if(drawerLayout.isDrawerOpen(GravityCompat.START))
{
drawerLayout.closeDrawer(GravityCompat.START);
}
else
{
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home_page, menu);
return true;
}
@Override
public boolean onSupportNavigateUp() {
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
return NavigationUI.navigateUp(navController, mAppBarConfiguration)
|| super.onSupportNavigateUp();
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId())
{
case R.id.nav_home:
break;
case R.id.nav_Science:
startActivity(new Intent(HomePage.this,Page1.class));
break;
case R.id.nav_Contact_Us:
Toast.makeText(this,"Share",Toast.LENGTH_SHORT).show();
break;
case R.id.nav_Log_out:
startActivity(new Intent(HomePage.this,MainActivity.class));
break;
}
drawerLayout.closeDrawer(GravityCompat.START);
return true;
}
}
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
@颜色/原色
@颜色/原色暗
@颜色/颜色重音
假的
真的
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/header"
app:menu="@menu/main_menu" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv1"
android:layout_width="0dp"
android:layout_height="150dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/textView2"
app:layout_constraintTop_toBottomOf="@+id/toolbar2"
app:srcCompat="@drawable/p" />
<TextView
android:id="@+id/textView3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:fontFamily="sans-serif-condensed-medium"
android:text="Let's Think and Build"
android:textSize="18sp"
app:layout_constraintEnd_toStartOf="@+id/iv1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView2" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:fontFamily="serif"
android:text="Thinker Lab"
android:textSize="36sp"
app:layout_constraintEnd_toStartOf="@+id/iv1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/toolbar2" />
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#04FFFFFF"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
tools:layout_editor_absoluteX="1dp"
tools:ignore="MissingConstraints" />
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="175dp"
android:orientation="horizontal"
android:padding="10dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/iv1">
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv2"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
app:srcCompat="@drawable/science" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/iv2"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:fontFamily="@font/aclonica"
android:text="Science"
android:textSize="18sp" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv3"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
app:srcCompat="@drawable/maths" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/iv3"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:fontFamily="@font/aclonica"
android:text="Mathematics"
android:textSize="18sp" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="175dp"
android:orientation="horizontal"
android:padding="10dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/linearLayout2">
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv4"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
app:srcCompat="@drawable/engg" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/iv4"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:fontFamily="@font/aclonica"
android:text="Engineering"
android:textSize="18sp" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv5"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
app:srcCompat="@drawable/tech" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/iv5"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:fontFamily="@font/aclonica"
android:text="Technology"
android:textSize="18sp" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.drawerlayout.widget.DrawerLayout>
请帮我找到解决办法。我陷入这个困境已经一个多星期了。我在使用多模块开发时也遇到了这个问题。经过调查，我发现这是因为我在另一个模块中创建了一个同名的XML。XML中没有任何内容，因此请更改名称以解决它。这都是关于文件命名的。回想一下您最近添加/替换/重命名了哪些文件，并将其回滚。在当前的
活动主页中似乎没有ID为工具栏的
，
，layout.E/AndroidRuntime:FATAL EXCEPTION:main Process:com.example.thinkerlab，PID:3053 java.lang.RuntimeException:无法启动活动组件信息{com.example.thinkerlab/com.example.thinkerlab.HomePage}:java.lang.IllegalArgumentException:ID未引用android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2517）中此活动内的视图在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2577）在android.app.ActivityThread.access$1000（ActivityThread.java:166）现在显示此错误，我更改了您所说的，这是一个完全不同的问题。您的活动主页
布局中是否有ID为的
导航主机碎片
？我的活动主页布局中没有碎片。我已经发布了我的xml文件，请帮助我。没有更多要说的了。如果要在该活动中使用导航组件，则需要在其布局中使用上述
。假设您希望抽屉始终在那里，它将取代
，您将移动到它自己的布局文件中，以获得一个单独的片段。否则，如果您真的不想在那里使用导航，那么就去掉所有Java代码。