React Native Google Cast MiniPlayer Base Implementation (Android)

GoogleCastMiniPlayer.java

package com.yourapp.cast;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;


import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

import com.facebook.react.ReactActivity;
import com.facebook.react.bridge.ReactContext;


public class GoogleCastMiniPlayer extends FrameLayout {
  public GoogleCastMiniPlayer(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    initView();
  }

  public GoogleCastMiniPlayer(Context context, AttributeSet attrs) {
    super(context, attrs);
    initView();
  }

  public GoogleCastMiniPlayer(Context context) {
    super(context);
    initView();
  }


  private void initView() {
    // FIXME: there are still cases where this can throw because of a duplicate ID (especially with react fast refresh!)
    inflate(this.getContext(), R.layout.google_cast_miniplayer, this);
  }

  @Override
  protected void onDetachedFromWindow() {

    // required to handle react reloads. We need to destroy the old fragment because it uses a static id that would crash with "duplicate"
    // There is only one instance of the fragment possible!
    FragmentManager fm = ((ReactActivity) ((ReactContext) this.getContext()).getCurrentActivity()).getSupportFragmentManager();

    Fragment xmlFragment = fm.findFragmentById(R.id.castMiniController);
    if (xmlFragment != null) {
      fm.beginTransaction().remove(xmlFragment).commit();
    }
    super.onDetachedFromWindow();
  }
}

GoogleCastMiniPlayerManager.java

package com.yourapp.cast;

import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.SimpleViewManager;
import com.facebook.react.uimanager.ThemedReactContext;
import com.google.android.gms.cast.framework.media.widget.MiniControllerFragment;

public class GoogleCastMiniPlayerManager extends SimpleViewManager<GoogleCastMiniPlayer> {

  public static final String REACT_CLASS = "RNGoogleCastMiniPlayer";
  ReactApplicationContext mCallerContext;

  public GoogleCastMiniPlayerManager(ReactApplicationContext reactContext) {
    mCallerContext = reactContext;
  }

  @Override
  public String getName() {
    return REACT_CLASS;
  }

  @Override
  public GoogleCastMiniPlayer createViewInstance(ThemedReactContext context) {
    return new GoogleCastMiniPlayer(context);
  }
}

GoogleCastPackage.java

package com.yourapp.cast;

import androidx.annotation.NonNull;

import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class GoogleCastPackage implements ReactPackage {


  @NonNull
  @Override
  public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
    List<ViewManager> modules = new ArrayList<>();
    modules.add(new GoogleCastMiniPlayerManager(reactContext));
    return modules;
  }

  @NonNull
  @Override
  public List<NativeModule> createNativeModules(
          ReactApplicationContext reactContext) {
    List<NativeModule> modules = new ArrayList<>();

    return modules;
  }
}

Thank you for posting this, saved my butt on a project I am working on to have this.