CODEWITHSUNDEEP
androidandroid-studiointellij-idea
Zionnite
Zionnite

Reputation: 463

Could not Resolve Symbol R After Migrating to Androidx

After migrating to Androidx,my project start displaying a red underline error which says could not resolve R.

  1. i have Tried googling for some similar issue but yet the error remain,
  2. i have checked my manifest, my Res folder for error
  3. i have novalidate/restart project
  4. i have clean and rebuild project
  5. i have sync gradle with android project

yet after i have done these, the error still remains

dependencies {
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
//    implementation 'com.google.android.material:material:1.0.0-rc01'
    implementation 'com.google.android.material:material:1.1.0-alpha05'
    implementation 'androidx.multidex:multidex:2.0.1'
    implementation 'androidx.appcompat:appcompat:1.0.2'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'


    implementation 'com.github.maxyou:CalendarPicker:v1.1.2'

//    Ramotion
    implementation 'com.ramotion.paperonboarding:paper-onboarding:1.1.3'
    implementation 'com.ramotion.foldingcell:folding-cell:1.2.3'
    implementation 'com.ramotion.garlandview:garland-view:0.3.3'
}

MyApplication.java

package xyz.esusku.nearbyworker;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}```

Upvotes: 3

Views: 2243

Answers (2)

CrazyCoder
CrazyCoder

Reputation: 402403

See https://twitter.com/tasomaniac/status/1103020923874131968 for the details.

Gradle Android Plugin 3.3+ no longer generates R source file. You either need to update to the IDE that supports the new binary format for the resources or downgrade the plug-in to an older version in your build.gradle.

Upvotes: 4

Sujeet Kumar
Sujeet Kumar

Reputation: 276

Hope you have added these line in gradle.properties file: as you are trying to migrate existing project.

android.useAndroidX=true
android.enableJetifier=true

one more thing try removing the duplicate import- 

import android.support.v7.app.AppCompatActivity; //remove this line
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

Upvotes: 1

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