CODEWITHSUNDEEP
androidandroid-recyclerview
Angelo Dayao
Angelo Dayao

Reputation: 25

Error when trying to use a RecyclerView - why?

I am a new Android Studio developer and I am studying how to use RecyclerView but it seem I can't make it work using all the tutorials I searched both on google and youtube. Below errors are showing when I try to run the code I copied on this website - https://medium.com/android-grid/how-to-use-firebaserecycleradpater-with-latest-firebase-dependencies-in-android-aff7a33adb8b

Please help. I'm using the latest AndroidStudio version.

Errors:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.itbscorp.testrecycler, PID: 18467
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.itbscorp.testrecycler/com.itbscorp.testrecycler.MainActivity}: android.view.InflateException: Binary XML file line #33: Binary XML file line #33: Error inflating class android.support.v7.widget.RecyclerView
        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 #33: Binary XML file line #33: Error inflating class android.support.v7.widget.RecyclerView
     Caused by: android.view.InflateException: Binary XML file line #33: Error inflating class android.support.v7.widget.RecyclerView
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.widget.RecyclerView" on path: DexPathList[[zip file "/data/app/com.itbscorp.testrecycler-kbheTQbZQdBBMxi8OmT9Ew==/base.apk"],nativeLibraryDirectories=[/data/app/com.itbscorp.testrecycler-kbheTQbZQdBBMxi8OmT9Ew==/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.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:555)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
        at com.itbscorp.testrecycler.MainActivity.onCreate(MainActivity.java:43)
        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)

MainActivity.java

public class Model {
    public String mId, mTitle, mDesc;

    public Model() {

    }

    public Model(String mId, String mTitle, String mDesc) {
        this.mId = mId;
        this.mTitle = mTitle;
        this.mDesc = mDesc;
    }

    public String getmId() {
        return mId;
    }

    public void setmId(String mId) {
        this.mId = mId;
    }

    public String getmTitle() {
        return mTitle;
    }

    public void setmTitle(String mTitle) {
        this.mTitle = mTitle;
    }

    public String getmDesc() {
        return mDesc;
    }

    public void setmDesc(String mDesc) {
        this.mDesc = mDesc;
    }
}

activity_main.xml

    <?xml version="1.0" encoding="utf-8"?>a
    <LinearLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <EditText
            android:id="@+id/et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="8dp"
            android:layout_gravity="center" />
        <EditText
            android:id="@+id/etd"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="8dp"
            android:layout_gravity="center" />
        <Button
            android:id="@+id/btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Add"/>
    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </android.support.v7.widget.RecyclerView>

</LinearLayout>

Model.java

public class Model {
    public String mId, mTitle, mDesc;

    public Model() {

    }

    public Model(String mId, String mTitle, String mDesc) {
        this.mId = mId;
        this.mTitle = mTitle;
        this.mDesc = mDesc;
    }

    public String getmId() {
        return mId;
    }

    public void setmId(String mId) {
        this.mId = mId;
    }

    public String getmTitle() {
        return mTitle;
    }

    public void setmTitle(String mTitle) {
        this.mTitle = mTitle;
    }

    public String getmDesc() {
        return mDesc;
    }

    public void setmDesc(String mDesc) {
        this.mDesc = mDesc;
    }
}

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="16dp"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    android:layout_marginStart="16dp"
    android:layout_marginTop="8dp">

    <LinearLayout
        android:id="@+id/list_root"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:focusable="true"
        android:orientation="vertical"
        android:background="?attr/selectableItemBackground"
        android:padding="16dp">

        <TextView
            android:id="@+id/list_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Title"
            android:textColor="#000000"
            android:textSize="16sp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/list_desc"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:text="Description" />

    </LinearLayout>

</android.support.v7.widget.CardView>

build.grade file

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.itbscorp.testrecycler"
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.firebaseui:firebase-ui-database:6.1.0'
    implementation 'com.firebaseui:firebase-ui-firestore:6.1.0'
    implementation 'com.firebaseui:firebase-ui-auth:6.1.0'
    implementation 'com.firebaseui:firebase-ui-storage:6.1.0'
    implementation 'com.google.firebase:firebase-database:16.0.4'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Upvotes: 0

Views: 107

Answers (2)

Wassim Ben Hssen
Wassim Ben Hssen

Reputation: 529

you should change android.support.v7.widget.RecyclerView in your xml to androidx.recyclerview.widget.RecyclerView.

and in your project dependencies check if you set the right one for recyclerview

implementation 'androidx.recyclerview:recyclerview:1.1.0'

Upvotes: 1

Timmeeh93
Timmeeh93

Reputation: 233

You're using the android.support.v7.widget.RecyclerView, which is outdated and also not included in your project.

Either make sure to include android.support.v7.widget.RecyclerView in your build.gradle or refactor by using the androidx recyclerview library.

for the old support library use: implementation 'com.android.support:recyclerview-v7:28.0.0'

For AndroidX: implementation 'androidx.recyclerview:recyclerview:1.1.0' and change android.support.v7.widget.RecyclerView in your xml with androidx.recyclerview.widget.RecyclerView.

Upvotes: 1

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