Cannot resolve symbol v7 : import android.support.v7.widget.RecyclerView

I'm trying to import this :import android.support.v7.widget.RecyclerView;

But I got that : "Cannot resolve symbole v7".

Indeed, when I'm typing android.support. I can choose v4 but not v7

This is my build.gradle :

apply plugin: 'com.android.application'
android { compileSdkVersion 28 defaultConfig { applicationId "com.example.bibstandardandroidstudio" minSdkVersion 23 targetSdkVersion 28 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } buildToolsVersion '28.0.3'
}
dependencies { implementation fileTree(include: ['*.jar'], dir: 'libs') implementation 'androidx.appcompat:appcompat:1.1.0-alpha04' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.2.0-alpha03' androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0-alpha03' implementation 'com.google.android.material:material:1.0.0' implementation 'org.mindrot:jbcrypt:0.4' implementation 'com.android.volley:volley:1.1.1' implementation 'com.google.code.gson:gson:2.8.5' implementation 'com.android.support:appcompat-v7:28.0.0' implementation 'com.android.support:recyclerview-v7:28.0.0'
}

I'm new to Android and I'm trying to follow this tutorial : Create a List with RecyclerView

I saw that implementation 'com.android.support:appcompat-v7:28.0.0' should unlock my situation but it don't seem to work

2 Answers

Add the following dependency to use recylerview:

implementation 'com.android.support:recyclerview-v7:28.0.0'

or for Android X:

implementation 'androidx.recyclerview:recyclerview:1.0.0'

as specified in point 2 under "Add the support library" creating recylerview. You can use the recyclerview under androidx like so:

 <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent"/>

The support library has got a new version and is no longer used. I also recommend to use AndroidX.

Click Refactor option in the android studio ribbon and choose Migrate to AndroidX. If you are new there then first create a copy of the project and then try AndroidX. Well, there is not much difference.

Then use the AndroidX recyclerview:

<androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent"/>