IllegalArgumentException: ID does not reference a View inside this Activity - android-studio

Question

I have been trying to make a home page for my app which contains some modern dashboard along with navigation drawer.
Error found in my code:
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) 
AndroidManifest.xml file of my project:
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".Page1"></activity>
<activity android:name=".Startpage" />
<activity
android:name=".HomePage"
android:label="#string/title_activity_home_page"
android:theme="#style/AppTheme.NoActionBar" />
<activity android:name=".ResetPassword" />
<activity android:name=".RegistrationActivity" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="preloaded_fonts"
android:resource="#array/preloaded_fonts" />
</application>
HomePage.java file of my project:
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;
}
}
styles.xml file of my project:
<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" />
My activity_home_page xml file:
<?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>
Please Help me find a solution to this. I am stuck in this for over a week now.

Answer 1

I also encountered this problem when I used multi-module development. After investigation, I found that it was because I created an XML with the same name in another module. There is no in that XML, so change the name to solve it.

Answer 2

you are using this nav controller
mNavController = findNavController(R.id.nav_host_fragment_activity_main)
you need to use this supportFragmentManager nav controller
val navHostFragment =
supportFragmentManager.findFragmentById(R.id.nav_host_fragment_activity_main)
as NavHostFragment
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
mNavController = navHostFragment.navController
xml code looks like this
<androidx.fragment.app.FragmentContainerView
android:id="#+id/nav_host_fragment_activity_main"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />

Answer 3

It's all about file naming. Recall what files have you added/replaced/renamed just recently and roll it back.