fix(android): Do not hold a strong reference to native module in the package (#434)

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManager.java

   // state and release page resources (including any running JavaScript).
   protected static final String BLANK_URL = "about:blank";
   protected WebViewConfig mWebViewConfig;
-  private RNCWebViewPackage aPackage;
 
   public RNCWebViewManager() {
     mWebViewConfig = new WebViewConfig() {
       }
 
       protected void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType) {
-        getModule().startPhotoPickerIntent(filePathCallback, acceptType);
+        getModule(reactContext).startPhotoPickerIntent(filePathCallback, acceptType);
       }
 
       protected void openFileChooser(ValueCallback<Uri> filePathCallback) {
-        getModule().startPhotoPickerIntent(filePathCallback, "");
+        getModule(reactContext).startPhotoPickerIntent(filePathCallback, "");
       }
 
       protected void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType, String capture) {
-        getModule().startPhotoPickerIntent(filePathCallback, acceptType);
+        getModule(reactContext).startPhotoPickerIntent(filePathCallback, acceptType);
       }
 
       @TargetApi(Build.VERSION_CODES.LOLLIPOP)
         String[] acceptTypes = fileChooserParams.getAcceptTypes();
         boolean allowMultiple = fileChooserParams.getMode() == WebChromeClient.FileChooserParams.MODE_OPEN_MULTIPLE;
         Intent intent = fileChooserParams.createIntent();
-        return getModule().startPhotoPickerIntent(filePathCallback, intent, acceptTypes, allowMultiple);
+        return getModule(reactContext).startPhotoPickerIntent(filePathCallback, intent, acceptTypes, allowMultiple);
       }
     });
     reactContext.addLifecycleEventListener(webView);
 
     webView.setDownloadListener(new DownloadListener() {
       public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
-        RNCWebViewModule module = getModule();
+        RNCWebViewModule module = getModule(reactContext);
 
         DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
 
     ((RNCWebView) webView).cleanupCallbacksAndDestroy();
   }
 
-  public RNCWebViewPackage getPackage() {
-    return this.aPackage;
-  }
-
-  public void setPackage(RNCWebViewPackage aPackage) {
-    this.aPackage = aPackage;
-  }
-
-  public RNCWebViewModule getModule() {
-    return this.aPackage.getModule();
+  public RNCWebViewModule getModule(ReactContext reactContext) {
+    return reactContext.getNativeModule(RNCWebViewModule.class);
   }
 
   protected static class RNCWebViewClient extends WebViewClient {

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewModule.java

   private static final int PICKER_LEGACY = 3;
   private static final int FILE_DOWNLOAD_PERMISSION_REQUEST = 1;
   final String DEFAULT_MIME_TYPES = "*/*";
-  private final ReactApplicationContext reactContext;
-  private RNCWebViewPackage aPackage;
   private ValueCallback<Uri> filePathCallbackLegacy;
   private ValueCallback<Uri[]> filePathCallback;
   private Uri outputFileUri;
 
   public RNCWebViewModule(ReactApplicationContext reactContext) {
     super(reactContext);
-    this.reactContext = reactContext;
     reactContext.addActivityEventListener(this);
   }
 
     return result;
   }
 
-  public RNCWebViewPackage getPackage() {
-    return this.aPackage;
-  }
-
-  public void setPackage(RNCWebViewPackage aPackage) {
-    this.aPackage = aPackage;
-  }
-
   private Intent getPhotoIntent() {
     Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
     outputFileUri = getOutputUri(MediaStore.ACTION_IMAGE_CAPTURE);

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewPackage.java

 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.uimanager.ViewManager;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
 public class RNCWebViewPackage implements ReactPackage {
-
-  private RNCWebViewManager manager;
-  private RNCWebViewModule module;
-
   @Override
   public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
-    List<NativeModule> modulesList = new ArrayList<>();
-    module = new RNCWebViewModule(reactContext);
-    module.setPackage(this);
-    modulesList.add(module);
-    return modulesList;
+    return Collections.singletonList(new RNCWebViewModule(reactContext));
   }
 
   // Deprecated from RN 0.47
 
   @Override
   public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
-    manager = new RNCWebViewManager();
-    manager.setPackage(this);
-    return Arrays.<ViewManager>asList(manager);
-  }
-
-  public RNCWebViewModule getModule() {
-    return module;
+    return Collections.singletonList(new RNCWebViewManager());
   }
 }