App doesn't work after installation expo-av package

I just installed bare react-native app with expo-cli and install expo-av library (configure it of course), run it with react-native run-android, and it actually doesn’t work.

Expo CLI 2.11.9 environment info: System: OS: macOS High Sierra 10.13.6 Shell: 3.2.57 - /bin/bash Binaries: Node: 11.10.0 - /usr/local/bin/node npm: 6.8.0 - /usr/local/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman IDEs: Android Studio: 3.3 AI-182.5107.16.33.5314842 Xcode: 10.1/10B61 - /usr/bin/xcodebuild npmPackages: react: 16.6.3 => 16.6.3 react-native: 0.58.6 => 0.58.6 npmGlobalPackages: expo-cli: 2.11.9

my MainApplication.java

`package com.mytestapp;

import android.app.Application;

import com.facebook.react.ReactApplication;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.facebook.soloader.SoLoader;

import org.unimodules.adapters.react.ReactAdapterPackage;
import org.unimodules.adapters.react.ModuleRegistryAdapter;
import org.unimodules.adapters.react.ReactModuleRegistryProvider;
import org.unimodules.core.interfaces.Package;
import org.unimodules.core.interfaces.SingletonModule;
import expo.modules.constants.ConstantsPackage;
import expo.modules.permissions.PermissionsPackage;
import expo.modules.filesystem.FileSystemPackage;
import expo.modules.av.AVPackage;

import java.util.Arrays;
import java.util.List;

public class MainApplication extends Application implements ReactApplication {
  private final ReactModuleRegistryProvider mModuleRegistryProvider = new ReactModuleRegistryProvider(Arrays.<Package>asList(
     new ReactAdapterPackage(),
     new ConstantsPackage(),
     new PermissionsPackage(),
     new FileSystemPackage(),
     new AVPackage()
  ), Arrays.<SingletonModule>asList());

  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    @Override
    public boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
          new MainReactPackage(),
          new ModuleRegistryAdapter(mModuleRegistryProvider)
      );
    }

    @Override
    protected String getJSMainModuleName() {
      return "index";
    }
  };

  @Override
  public ReactNativeHost getReactNativeHost() {
    return mReactNativeHost;
  }

  @Override
  public void onCreate() {
    super.onCreate();
    SoLoader.init(this, /* native exopackage */ false);
  }
}
`

[sjchmiela]

Glad to hear that!

Try adding some style={{ width: 300, height: 300 }} to your Video component. 🙂

[sjchmiela]

I was able to fix this issue by adding

android {
  // ...

  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }

  // ...
}

to android/app/build.gradle. Could you please try this workaround?