fix MissingPluginException for Android

android/src/main/java/vn/hunghd/flutter/plugins/imagecropper/ImageCropperDelegate.java

@@ -5,6 +5,8 @@
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.net.Uri;
+import android.content.pm.PackageManager;
+import androidx.core.app.ActivityCompat;
 
 import com.yalantis.ucrop.UCrop;
 import com.yalantis.ucrop.model.AspectRatio;
@@ -20,7 +22,18 @@
 
 import static android.app.Activity.RESULT_OK;
 
-public class ImageCropperDelegate implements PluginRegistry.ActivityResultListener {
+public class ImageCropperDelegate implements PluginRegistry.ActivityResultListener,
+        PluginRegistry.RequestPermissionsResultListener {
+
+    static final int REQUEST_CODE_CHOOSE_IMAGE_FROM_GALLERY = 2342;
+    static final int REQUEST_CODE_TAKE_IMAGE_WITH_CAMERA = 2343;
+    static final int REQUEST_EXTERNAL_IMAGE_STORAGE_PERMISSION = 2344;
+    static final int REQUEST_CAMERA_IMAGE_PERMISSION = 2345;
+    static final int REQUEST_CODE_CHOOSE_VIDEO_FROM_GALLERY = 2352;
+    static final int REQUEST_CODE_TAKE_VIDEO_WITH_CAMERA = 2353;
+    static final int REQUEST_EXTERNAL_VIDEO_STORAGE_PERMISSION = 2354;
+    static final int REQUEST_CAMERA_VIDEO_PERMISSION = 2355;
+
     private final Activity activity;
     private MethodChannel.Result pendingResult;
     private FileUtils fileUtils;
@@ -127,6 +140,7 @@ private UCrop.Options setupUiCustomizedOptions(UCrop.Options options, MethodCall
         Integer toolbarWidgetColor = call.argument("android.toolbar_widget_color");
         Integer backgroundColor = call.argument("android.background_color");
         Integer activeControlsWidgetColor = call.argument("android.active_controls_widget_color");
+        Integer activeWidgetColor = call.argument("android.active_widget_color");
         Integer dimmedLayerColor = call.argument("android.dimmed_layer_color");
         Integer cropFrameColor = call.argument("android.crop_frame_color");
         Integer cropGridColor = call.argument("android.crop_grid_color");
@@ -158,6 +172,9 @@ private UCrop.Options setupUiCustomizedOptions(UCrop.Options options, MethodCall
         if (activeControlsWidgetColor != null) {
             options.setActiveControlsWidgetColor(activeControlsWidgetColor);
         }
+        if (activeWidgetColor != null) {
+            //options.setActiveWidgetColor(activeWidgetColor);
+        }
         if (dimmedLayerColor != null) {
             options.setDimmedLayerColor(dimmedLayerColor);
         }
@@ -227,4 +244,44 @@ private AspectRatio parseAspectRatioName(String name) {
                     CropImageView.SOURCE_IMAGE_ASPECT_RATIO, 1.0f);
         }
     }
-}
+
+    @Override
+    public boolean onRequestPermissionsResult(
+            int requestCode, String[] permissions, int[] grantResults) {
+        boolean permissionGranted =
+                grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED;
+
+        switch (requestCode) {
+            case REQUEST_EXTERNAL_IMAGE_STORAGE_PERMISSION:
+                if (permissionGranted) {
+                }
+                break;
+            case REQUEST_EXTERNAL_VIDEO_STORAGE_PERMISSION:
+                if (permissionGranted) {
+                }
+                break;
+            case REQUEST_CAMERA_IMAGE_PERMISSION:
+                if (permissionGranted) {
+                }
+                break;
+            case REQUEST_CAMERA_VIDEO_PERMISSION:
+                if (permissionGranted) {
+                }
+                break;
+            default:
+                return false;
+        }
+
+        if (!permissionGranted) {
+            switch (requestCode) {
+                case REQUEST_EXTERNAL_IMAGE_STORAGE_PERMISSION:
+                case REQUEST_EXTERNAL_VIDEO_STORAGE_PERMISSION:
+                case REQUEST_CAMERA_IMAGE_PERMISSION:
+                case REQUEST_CAMERA_VIDEO_PERMISSION:
+                    break;
+            }
+        }
+
+        return true;
+    }
+}

android/src/main/java/vn/hunghd/flutter/plugins/imagecropper/ImageCropperPlugin.java

@@ -1,10 +1,23 @@
 package vn.hunghd.flutter.plugins.imagecropper;
 
+import android.util.Log;
 import android.app.Activity;
-
+import android.app.Application;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Looper;
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.DefaultLifecycleObserver;
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleOwner;
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.embedding.engine.plugins.activity.ActivityAware;
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
+import io.flutter.embedding.engine.plugins.lifecycle.FlutterLifecycleAdapter;
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
@@ -17,29 +30,106 @@
 
 /** ImageCropperPlugin */
 public class ImageCropperPlugin implements MethodCallHandler, FlutterPlugin, ActivityAware {
+
+  private class LifeCycleObserver
+          implements Application.ActivityLifecycleCallbacks, DefaultLifecycleObserver {
+    private final Activity thisActivity;
+
+    LifeCycleObserver(Activity activity) {
+      this.thisActivity = activity;
+    }
+
+    @Override
+    public void onCreate(@NonNull LifecycleOwner owner) {}
+
+    @Override
+    public void onStart(@NonNull LifecycleOwner owner) {}
+
+    @Override
+    public void onResume(@NonNull LifecycleOwner owner) {}
+
+    @Override
+    public void onPause(@NonNull LifecycleOwner owner) {}
+
+    @Override
+    public void onStop(@NonNull LifecycleOwner owner) {
+      onActivityStopped(thisActivity);
+    }
+
+    @Override
+    public void onDestroy(@NonNull LifecycleOwner owner) {
+      onActivityDestroyed(thisActivity);
+    }
+
+    @Override
+    public void onActivityCreated(Activity activity, Bundle savedInstanceState) {}
+
+    @Override
+    public void onActivityStarted(Activity activity) {}
+
+    @Override
+    public void onActivityResumed(Activity activity) {}
+
+    @Override
+    public void onActivityPaused(Activity activity) {}
+
+    @Override
+    public void onActivitySaveInstanceState(Activity activity, Bundle outState) {}
+
+    @Override
+    public void onActivityDestroyed(Activity activity) {
+      if (thisActivity == activity && activity.getApplicationContext() != null) {
+        ((Application) activity.getApplicationContext())
+                .unregisterActivityLifecycleCallbacks(
+                        this); // Use getApplicationContext() to avoid casting failures
+      }
+    }
+
+    @Override
+    public void onActivityStopped(Activity activity) {
+      if (thisActivity == activity) {
+        //delegate.saveStateBeforeResult();
+      }
+    }
+  }
+
   static
   {
     AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
   }
-  private static final String CHANNEL = "plugins.hunghd.vn/image_cropper";
 
-  private static ImageCropperPlugin instance;
-  private static MethodChannel channel;
-  private static ImageCropperDelegate delegate;
+  private static final String CHANNEL = "plugins.hunghd.vn/image_cropper";
 
+//  private static ImageCropperPlugin instance;
+//  private static MethodChannel channel;
+//  private static ImageCropperDelegate delegate;
+//  private ActivityPluginBinding activityBinding;
+//  private Activity activity;
+
+  private MethodChannel channel;
+  private ImageCropperDelegate delegate;
+  private FlutterPluginBinding pluginBinding;
+  private ActivityPluginBinding activityBinding;
+  private Application application;
   private Activity activity;
+  // This is null when not using v2 embedding;
+  private Lifecycle lifecycle;
+  private LifeCycleObserver observer;
+
   private final Object initializationLock = new Object();
 
   /** Plugin registration. */
   public static void registerWith(Registrar registrar) {
-    if (instance == null) {
-      instance = new ImageCropperPlugin();
+    if (registrar.activity() == null) {
+      return;
     }
-    if (registrar.activity() != null) {
-      instance.onAttachedToEngine(registrar.messenger());
-      instance.onAttachedToActivity(registrar.activity());
-      registrar.addActivityResultListener(instance.getActivityResultListener());
+    Activity activity = registrar.activity();
+    Application application = null;
+    if (registrar.context() != null) {
+      application = (Application) (registrar.context().getApplicationContext());
     }
+    ImageCropperPlugin plugin = new ImageCropperPlugin();
+    plugin.setup(registrar.messenger(), application, activity, registrar, null);
   }
 
   @Override
@@ -53,65 +143,90 @@ public void onMethodCall(MethodCall call, Result result) {
     }
   }
 
-  private void onAttachedToEngine(BinaryMessenger messenger) {
-    synchronized (initializationLock) {
-      if (channel != null) {
-        return;
-      }
+  public ImageCropperPlugin() {}
 
-      channel = new MethodChannel(messenger, CHANNEL);
-      channel.setMethodCallHandler(this);
-    }
-  }
-
-  private void onAttachedToActivity(Activity activity) {
+  @VisibleForTesting
+  ImageCropperPlugin(final ImageCropperDelegate delegate, final Activity activity) {
+    this.delegate = delegate;
     this.activity = activity;
-    delegate = new ImageCropperDelegate(activity);
-  }
-
-  private PluginRegistry.ActivityResultListener getActivityResultListener() {
-    return delegate;
   }
 
   @Override
   public void onAttachedToEngine(FlutterPluginBinding binding) {
-    onAttachedToEngine(binding.getBinaryMessenger());
+    pluginBinding = binding;
   }
 
   @Override
   public void onDetachedFromEngine(FlutterPluginBinding binding) {
-    channel.setMethodCallHandler(null);
-    channel = null;
+    pluginBinding = null;
   }
 
-
   @Override
   public void onAttachedToActivity(ActivityPluginBinding binding) {
-    if (getActivityResultListener() != null) {
-      binding.removeActivityResultListener(getActivityResultListener());
-    }
-    onAttachedToActivity(binding.getActivity());
-    binding.addActivityResultListener(getActivityResultListener());
+    activityBinding = binding;
+    setup(
+            pluginBinding.getBinaryMessenger(),
+            (Application) pluginBinding.getApplicationContext(),
+            activityBinding.getActivity(),
+            null,
+            activityBinding);
+  }
+
+  @Override
+  public void onDetachedFromActivity() {
+    tearDown();
   }
 
   @Override
   public void onDetachedFromActivityForConfigChanges() {
-    activity = null;
-    delegate = null;
+    onDetachedFromActivity();
   }
 
   @Override
   public void onReattachedToActivityForConfigChanges(ActivityPluginBinding binding) {
-    if (getActivityResultListener() != null) {
-      binding.removeActivityResultListener(getActivityResultListener());
+    onAttachedToActivity(binding);
+  }
+
+  private void setup(
+          final BinaryMessenger messenger,
+          final Application application,
+          final Activity activity,
+          final PluginRegistry.Registrar registrar,
+          final ActivityPluginBinding activityBinding) {
+    this.activity = activity;
+    this.application = application;
+    this.delegate = constructDelegate(activity);
+    channel = new MethodChannel(messenger, CHANNEL);
+    channel.setMethodCallHandler(this);
+    observer = new LifeCycleObserver(activity);
+    if (registrar != null) {
+      // V1 embedding setup for activity listeners.
+      application.registerActivityLifecycleCallbacks(observer);
+      registrar.addActivityResultListener(delegate);
+      registrar.addRequestPermissionsResultListener(delegate);
+    } else {
+      // V2 embedding setup for activity listeners.
+      activityBinding.addActivityResultListener(delegate);
+      activityBinding.addRequestPermissionsResultListener(delegate);
+      lifecycle = FlutterLifecycleAdapter.getActivityLifecycle(activityBinding);
+      lifecycle.addObserver(observer);
     }
-    onAttachedToActivity(binding.getActivity());
-    binding.addActivityResultListener(getActivityResultListener());
   }
 
-  @Override
-  public void onDetachedFromActivity() {
-    activity = null;
+  private void tearDown() {
+    activityBinding.removeActivityResultListener(delegate);
+    activityBinding.removeRequestPermissionsResultListener(delegate);
+    activityBinding = null;
+    lifecycle.removeObserver(observer);
+    lifecycle = null;
     delegate = null;
+    channel.setMethodCallHandler(null);
+    channel = null;
+    application.unregisterActivityLifecycleCallbacks(observer);
+    application = null;
+  }
+
+  private final ImageCropperDelegate constructDelegate(final Activity setupActivity) {
+    return new ImageCropperDelegate(setupActivity);
   }
-}
+}

example/.flutter-plugins-dependencies

@@ -0,0 +1 @@
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"image_picker","path":"/Users/lolq/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.6.6+1/","dependencies":[]},{"name":"image_cropper","path":"/Users/lolq/workspace/flutter_image_cropper/","dependencies":[]}],"android":[{"name":"flutter_plugin_android_lifecycle","path":"/Users/lolq/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_plugin_android_lifecycle-1.0.7/","dependencies":[]},{"name":"image_picker","path":"/Users/lolq/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.6.6+1/","dependencies":["flutter_plugin_android_lifecycle"]},{"name":"image_cropper","path":"/Users/lolq/workspace/flutter_image_cropper/","dependencies":["flutter_plugin_android_lifecycle"]}],"macos":[],"linux":[],"windows":[],"web":[]},"dependencyGraph":[{"name":"flutter_plugin_android_lifecycle","dependencies":[]},{"name":"image_picker","dependencies":["flutter_plugin_android_lifecycle"]},{"name":"image_cropper","dependencies":["flutter_plugin_android_lifecycle"]}],"date_created":"2020-05-12 18:42:18.873526","version":"1.18.0-11.0.pre.6"}

example/android/android.iml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="android" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="java-gradle" name="Java-Gradle">
+      <configuration>
+        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/../build" />
+        <option name="BUILDABLE" value="false" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>