Android infra, getAlbumsWithThumbnails working

android/build.gradle

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+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 23
+    buildToolsVersion "23.0.3"
+
+    defaultConfig {
+        minSdkVersion 16
+        targetSdkVersion 22
+        versionCode 1
+        versionName "1.0"
+        ndk {
+            abiFilters "armeabi-v7a", "x86"
+        }
+    }
+    lintOptions {
+       warning 'InvalidPackage'
+    }
+}
+
+dependencies {
+    compile 'com.facebook.react:react-native:0.20.+'
+}

android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.wix.RNCameraKit">
+</manifest>

android/src/main/java/com/wix/RNCameraKit/NativeGalleryManager.java

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+package com.wix.RNCameraKit;
+
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.provider.MediaStore;
+import android.util.Base64;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.Promise;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.bridge.WritableArray;
+import com.facebook.react.bridge.WritableMap;
+
+import java.io.ByteArrayOutputStream;
+import java.util.Collection;
+import java.util.HashMap;
+
+/**
+ * Created by yedidyak on 29/06/2016.
+ */
+public class NativeGalleryManager extends ReactContextBaseJavaModule {
+
+    private class Album {
+        String name;
+        String imageData = null;
+        int count = 1;
+
+        public Album(String name) {
+            this.name = name;
+        }
+    }
+
+    private class AlbumList {
+        HashMap<String, Album> albums = new HashMap<>();
+
+        public void addAlbum(String name) {
+            if (!albums.containsKey(name)) {
+                albums.put(name, new Album(name));
+            }
+            else {
+                albums.get(name).count++;
+            }
+        }
+
+        public void setThumbnail(String name, Bitmap thumbnail) {
+
+            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+            thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
+            byte[] byteArray = byteArrayOutputStream .toByteArray();
+            String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
+
+            albums.get(name).imageData = encoded;
+        }
+
+        public boolean hasThumbnail(String name) {
+            return albums.get(name).imageData != null;
+        }
+
+        public Collection<Album> getAlbums() {
+            return albums.values();
+        }
+    }
+
+    public NativeGalleryManager(ReactApplicationContext reactContext) {
+        super(reactContext);
+    }
+
+    @Override
+    public String getName() {
+        return "NativeGalleryManager";
+    }
+
+    @ReactMethod
+    public void getAlbumsWithThumbnails(Promise promise) {
+
+        String[] projection = new String[]{
+            MediaStore.Images.Media._ID,
+            MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
+            MediaStore.Images.Media._ID
+        };
+
+        Uri images = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+        Cursor imagesCursor = getCurrentActivity().getContentResolver().query(images, projection, null, null, null);
+
+        AlbumList albums = new AlbumList();
+
+        if (imagesCursor.moveToFirst()) {
+            int bucketColumn = imagesCursor.getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
+            int thumbIdColumn = imagesCursor.getColumnIndex(MediaStore.Images.Media._ID);
+            do {
+                String name = imagesCursor.getString(bucketColumn);
+                albums.addAlbum(name);
+
+                if(!albums.hasThumbnail(name)) {
+                    int thumbId = imagesCursor.getInt(thumbIdColumn);
+                    Bitmap thumb = MediaStore.Images.Thumbnails.getThumbnail(
+                            getCurrentActivity().getContentResolver(),
+                            thumbId,
+                            MediaStore.Images.Thumbnails.MINI_KIND,
+                            null);
+                    albums.setThumbnail(name, thumb);
+                }
+            } while (imagesCursor.moveToNext());
+        }
+
+        WritableArray arr = Arguments.createArray();
+
+        for (Album album : albums.getAlbums()) {
+            WritableMap map = Arguments.createMap();
+            map.putInt("imagesCount", album.count);
+            map.putString("albumName", album.name);
+            map.putString("image", album.imageData);
+            arr.pushMap(map);
+        }
+
+        WritableMap ret = Arguments.createMap();
+        ret.putArray("albums", arr);
+
+        promise.resolve(ret);
+    }
+
+    @ReactMethod
+    public void getPhotosForAlbum(String albumName, int numberOfPhotos, Promise promise) {
+
+    }
+}

android/src/main/java/com/wix/RNCameraKit/RNCameraKitPackage.java

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+package com.wix.RNCameraKit;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.JavaScriptModule;
+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 RNCameraKitPackage implements ReactPackage {
+
+  @Override
+  public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+    List<NativeModule> modules = new ArrayList<>();
+    modules.add(new NativeGalleryManager(reactContext));
+    return modules;
+  }
+
+  @Override
+  public List<Class<? extends JavaScriptModule>> createJSModules() {
+  	return Collections.emptyList();
+  }
+
+  @Override
+  public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+  	return Collections.emptyList();
+  }
+
+}

index.android.js

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+import CameraKitGallery from './src/CameraKitGallery';
+//import CameraKitCamera from './src/CameraKitCamera';
+//import CameraKitGalleryView from './src/CameraKitGalleryView';
+
+export {
+	CameraKitGallery,
+  //CameraKitCamera,
+  //CameraKitGalleryView
+};
+
+
+

src/CameraKitGallery.android.js

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+import {NativeModules} from 'react-native';
+const NativeGalleryManager = NativeModules.NativeGalleryManager;
+import _ from 'lodash';
+
+async function getAlbumsWithThumbnails() {
+  const albums = await NativeGalleryManager.getAlbumsWithThumbnails();
+  return albums;
+}
+
+
+async function getPhotosForAlbum(albumName, numberOfPhotos) {
+
+}
+
+export default {
+  getAlbumsWithThumbnails,
+  getPhotosForAlbum
+}