content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.weex.utils;
  
  import android.content.Context;
  import android.content.Intent;
  import android.graphics.Bitmap;
  import android.graphics.Color;
  import android.net.Uri;
  import android.os.Environment;
  import android.os.Handler;
  import android.os.Looper;
  import android.provider.MediaStore;
  import android.support.annotation.ColorInt;
  import android.view.View;
  
  import org.apache.weex.WXSDKManager;
  
  import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  
  /**
   * Created by miomin on 7/25/17.
   */
  public class WXViewToImageUtil {
  
      public static int mBackgroundColor = Color.TRANSPARENT;
  
      /**
       * Generate image and return path via callback
       */
      public static void generateImage(final View imageView, final int width,
                                       @ColorInt final int backgroundColor, final OnImageSavedCallback mOnImageSavedCallback) {
  
          mBackgroundColor = backgroundColor;
  
          // Only one save image task occurs at the same time
          WXSDKManager.getInstance().getWXWorkThreadManager().post(new Thread(new Runnable() {
              @Override
              public void run() {
                  // Generate bitmap from ImageView
                  Bitmap bitmap = getBitmapFromImageView(imageView, width);
  
                  if (bitmap == null) {
                      if (mOnImageSavedCallback != null) {
                          mOnImageSavedCallback.onSaveFailed("Image is empty");
                      }
                      return;
                  }
  
                  // Sava bitmap to gallery
                  final String destPath = saveBitmapToGallery(imageView.getContext(), bitmap, mOnImageSavedCallback);
  
                  new Handler(Looper.getMainLooper()).post(new Runnable() {
                      @Override
                      public void run() {
                          if (mOnImageSavedCallback != null) {
                              mOnImageSavedCallback.onSaveSucceed(destPath);
                              imageView.getContext().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse(destPath)));
                          }
                      }
                  });
              }
          }));
      }
  
      /**
       * Save bitmap to gallery
       * @return image save path
       */
      public static String saveBitmapToGallery(Context context, Bitmap bitmap, final OnImageSavedCallback mOnImageSavedCallback) {
  
          // Save image
          File appDir = new File(Environment.getExternalStorageDirectory(), "Weex");
          if (!appDir.exists()) {
              appDir.mkdir();
          }
  
          String fileName = System.currentTimeMillis() + ".jpg";
          File file = new File(appDir, fileName);
  
          try {
              FileOutputStream fos = new FileOutputStream(file);
              bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
              fos.flush();
              fos.close();
          } catch (FileNotFoundException e) {
              if (mOnImageSavedCallback != null)
                  mOnImageSavedCallback.onSaveFailed("Image creation failed due to system reason");
              e.printStackTrace();
          } catch (IOException e) {
              if (mOnImageSavedCallback != null)
                  mOnImageSavedCallback.onSaveFailed("Android IOException");
              e.printStackTrace();
          }
  
          // Insert the image file into the system gallery
          try {
              MediaStore.Images.Media.insertImage(context.getContentResolver(),
                      file.getAbsolutePath(), fileName, null);
          } catch (FileNotFoundException e) {
              e.printStackTrace();
          }
  
          // Notify the system gallery update
          context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + appDir.getAbsolutePath() + "/" + fileName)));
  
          return file.getAbsolutePath();
      }
  
      /**
       * Save state callback
       */
      public interface OnImageSavedCallback {
          void onSaveSucceed(String path);
          void onSaveFailed(String errorDesc);
      }
  
      /**
       * Get bitmap from imageview
       */
      public static Bitmap getBitmapFromImageView(final View view, int width) {
          if (view.getWidth() <= 0 || view.getHeight() <= 0) {
              view.measure(View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
                      View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
              view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
          }
  
          view.setDrawingCacheEnabled(true);
          Bitmap bitmap = view.getDrawingCache();
          return bitmap;
      }
  }
  