CODEWITHSUNDEEP
androidreactjsreact-nativeexpo
Tias
Tias

Reputation: 73

Android Error: Cannot resolve symbol 'PackageList'

Cannot resolve symbol 'PackageList'

I am getting this error once I open the android folder in my newly generated react-native project.

The steps to recreate it for me is to make the expo project: expo init my-app

Then eject the project: Expo eject

And then I go into the android folder and open android\app\src\main\java\Android\Screen\MainActivity.java

and I get the bug.

any help would be much appreciated.Image of error in the android studio

Upvotes: 7

Views: 20909

Answers (6)

VelocityPulse
VelocityPulse

Reputation: 632

Solution 1

If it's not done, you should verify that you correctly have this apply at the end of your android/app/build.gradle.

apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

If you open ../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle You can see the beginning of the file speaking about PackageList:

import groovy.json.JsonSlurper
import org.gradle.initialization.DefaultSettings
import org.apache.tools.ant.taskdefs.condition.Os

**def generatedFileName = "PackageList.java"**
def generatedFilePackage = "com.facebook.react"
def generatedFileContentsTemplate = """
package $generatedFilePackage;

import android.app.Application;
import android.content.Context;
import android.content.res.Resources;

It seems that this apply in the gradle was not mandatory before.

Solution 2

If it's still not working, this link help me to verify more the updates to do in my android/app/build.gradle https://github.com/facebook/react-native/issues/25787#issuecomment-514285556 And more precisely : https://react-native-community.github.io/upgrade-helper/?from=0.68.5&to=0.73.4#RnDiffApp-android-app-build.gradle

And in my case I was missing some stuffs : Removing

project.ext.react = [
    enableHermes: true,
]

and also renaming enableHermes to hermesEnabled in the following code :

if (hermesEnabled.toBoolean()) {
    implementation("com.facebook.react:hermes-android")
} else {
    implementation jscFlavor
}

That solved this error while I was doing migration from 0.68 to 0.73.

Source: https://github.com/MohGovIL/hamagen-react-native/issues/178

Upvotes: 1

naveed ahmed
naveed ahmed

Reputation: 470

I have to run my project, and my issue will be resolved.

Upvotes: 5

abdi
abdi

Reputation: 589

I was getting this on version 0.3.1 of @react-native-masked-view/masked-view on react-native v0.67.5. Downgrading to v0.2.9 works as a temporary solution.

Upvotes: 0

SUSMITA BHATTACHARYA
SUSMITA BHATTACHARYA

Reputation: 21

I am Totally agree with above answer.

You can solve this by creating a new package (right click on your java folder and select new -> package), give it any name. Within the package create a java class called PackageList.

But in the above code, on the following line

return this.reactNativeHost.getApplication(); I get some error, like

Blockquote error: getApplication() has protected access in ReactNativeHost return this.reactNativeHost.getApplication();

So, to resolve this, this is my modified PackageList Class.

package packagelist;

import android.app.Application;
import android.content.Context;
import android.content.res.Resources;

import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainPackageConfig;
import com.facebook.react.shell.MainReactPackage;

import java.util.Arrays;
import java.util.ArrayList;

public class PackageList {
    private Application application;
    private ReactNativeHost reactNativeHost;
    private MainPackageConfig mConfig;

    public PackageList(Application application) {
        this(application, null);
    }

    public PackageList(Application application, MainPackageConfig config) {
        this.application = application;
        this.reactNativeHost = null;
        this.mConfig = config;
    }

    private Resources getResources() {
        return this.application.getResources();
    }

    private Context getApplicationContext() {
        return this.application.getApplicationContext();
    }

    public ArrayList<ReactPackage> getPackages() {
        return new ArrayList<>(Arrays.asList(
                new MainReactPackage(mConfig)
        ));
    }
}

Hope, this will help someone. :)

Upvotes: 1

Rich
Rich

Reputation: 975

You need to do a gradle sync (and build) first - the build will fail, but create PackageList for you (in e.g. android/app/build/generated/rncli/src/main/java/com/facebook/react/PackageList.java

Similarly, it creates a BuildConfig.java

Upvotes: 8

Ezile Mdodana
Ezile Mdodana

Reputation: 82

You can solve this by creating a new package (right click on your java folder and select new -> package), give it any name. Within the package create a java class called PackageList within PackageList paste the following code:

package com<NameOfYourProject>;

import android.app.Application;
import android.content.Context;
import android.content.res.Resources;

import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainPackageConfig;
import com.facebook.react.shell.MainReactPackage;
import java.util.Arrays;
import java.util.ArrayList;



public class PackageList {
  private Application application;
  private ReactNativeHost reactNativeHost;
  private MainPackageConfig mConfig;

  public PackageList(ReactNativeHost reactNativeHost) {
    this(reactNativeHost, null);
  }

  public PackageList(Application application) {
    this(application, null);
  }

  public PackageList(ReactNativeHost reactNativeHost, MainPackageConfig config) {
    this.reactNativeHost = reactNativeHost;
    mConfig = config;
  }

  public PackageList(Application application, MainPackageConfig config) {
    this.reactNativeHost = null;
    this.application = application;
    mConfig = config;
  }

  private ReactNativeHost getReactNativeHost() {
    return this.reactNativeHost;
  }

  private Resources getResources() {
    return this.getApplication().getResources();
  }

  private Application getApplication() {
    if (this.reactNativeHost == null) return this.application;
    return this.reactNativeHost.getApplication();
  }

  private Context getApplicationContext() {
    return this.getApplication().getApplicationContext();
  }

  public ArrayList<ReactPackage> getPackages() {
    return new ArrayList<>(Arrays.<ReactPackage>asList(
      new MainReactPackage(mConfig)
    ));
  }
}

Upvotes: 2

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