在viewpager中將圖像從imageview保存到圖庫

Question

我設法使用onlongclicklistner（）在下面給出的代碼的幫助下將圖像從imageview保存到圖庫。但問題是，它總是保存最後的圖像劑量問題，我試圖保存圖像。

public class CapturePhotoUtils { 


     public final String insertImage(ContentResolver cr, 
               Bitmap source, 
               String title, 
               String description) { 

      ContentValues values = new ContentValues(); 
      values.put(MediaStore.Images.Media.TITLE, title); 
      values.put(MediaStore.Images.Media.DISPLAY_NAME, title); 
      values.put(MediaStore.Images.Media.DESCRIPTION, description); 
      values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg"); 
      // Add the date meta data to ensure the image is added at the front of the gallery 
      values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis()); 
      values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis()); 

      Uri url = null; 
      String stringUrl = null; /* value to be returned */ 

      try { 
       url = cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); 

       if (source != null) { 
        OutputStream imageOut = cr.openOutputStream(url); 
        try { 
         source.compress(Bitmap.CompressFormat.JPEG, 50, imageOut); 
        } finally { 
         imageOut.close(); 
        } 

        long id = ContentUris.parseId(url); 
        // Wait until MINI_KIND thumbnail is generated. 
        Bitmap miniThumb = MediaStore.Images.Thumbnails.getThumbnail(cr, id, MediaStore.Images.Thumbnails.MINI_KIND, null); 
        // This is for backward compatibility. 
        storeThumbnail(cr, miniThumb, id, 50F, 50F, MediaStore.Images.Thumbnails.MICRO_KIND); 
       } else { 
        cr.delete(url, null, null); 
        url = null; 
       } 
      } catch (Exception e) { 
       if (url != null) { 
        cr.delete(url, null, null); 
        url = null; 
       } 
      } 

      if (url != null) { 
       stringUrl = url.toString(); 
      } 

      return stringUrl; 
     } 


     private final Bitmap storeThumbnail(
       ContentResolver cr, 
       Bitmap source, 
       long id, 
       float width, 
       float height, 
       int kind) { 

      // create the matrix to scale it 
      Matrix matrix = new Matrix(); 

      float scaleX = width/source.getWidth(); 
      float scaleY = height/source.getHeight(); 

      matrix.setScale(scaleX, scaleY); 

      Bitmap thumb = Bitmap.createBitmap(source, 0, 0, 
        source.getWidth(), 
        source.getHeight(), matrix, 
        true 
      ); 

      ContentValues values = new ContentValues(4); 
      values.put(MediaStore.Images.Thumbnails.KIND,kind); 
      values.put(MediaStore.Images.Thumbnails.IMAGE_ID,(int)id); 
      values.put(MediaStore.Images.Thumbnails.HEIGHT,thumb.getHeight()); 
      values.put(MediaStore.Images.Thumbnails.WIDTH,thumb.getWidth()); 

      Uri url = cr.insert(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, values); 

      try { 
       OutputStream thumbOut = cr.openOutputStream(url); 
       thumb.compress(Bitmap.CompressFormat.JPEG, 100, thumbOut); 
       thumbOut.close(); 
       return thumb; 
      } catch (FileNotFoundException ex) { 
       return null; 
      } catch (IOException ex) { 
       return null; 
      } 
     } 
    } 

我從viewpager從可繪製的陣列獲取圖像將圖像

類CustomPagerAdapter擴展PagerAdapter {

Context mContext; 
    LayoutInflater mLayoutInflater; 

    public CustomPagerAdapter(Context context) { 
     mContext = context; 
     mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getCount() { 
     return mResources.length; 
    } 


    @Override 
    public boolean isViewFromObject(View view, Object object) { 
     return view == ((LinearLayout) object); 
    } 

    @Override 
    public Object instantiateItem(ViewGroup container, int position) { 
     View itemView = mLayoutInflater.inflate(R.layout.image_slider_item, container, false); 

     imageView = (TouchImageView) itemView.findViewById(R.id.imageView); 
     imageView.setImageResource(mResources[position]); 

     imageView.setOnLongClickListener(new View.OnLongClickListener() { 
      @Override 
      public boolean onLongClick(View view) { 

       CapturePhotoUtils photoUtils = new CapturePhotoUtils(); 
       imageView.setDrawingCacheEnabled(true); 
       Bitmap b = imageView.getDrawingCache(); 
       photoUtils.insertImage(Full_Screen_Slider.this.getContentResolver(), 
        b, "1image", "this is downloaded image sample"); 
       Toast.makeText(mContext, "longpress ", Toast.LENGTH_SHORT).show(); 

       return true; 
      } 
     }); 

     container.addView(itemView); 

     return itemView; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     container.removeView((LinearLayout) object); 
    } 

} 

Answer 1

替換此

@Override 
    public Object instantiateItem(ViewGroup container,final int position) { 
     final View itemView = mLayoutInflater.inflate(R.layout.image_slider_item, container, false); 

     final TouchImageView imageView = (TouchImageView) itemView.findViewById(R.id.imageView); 
     imageView.setImageResource(mResources[position]); 

     imageView.setOnLongClickListener(new View.OnLongClickListener() { 
      @Override 
      public boolean onLongClick(View view) { 

       CapturePhotoUtils photoUtils = new CapturePhotoUtils(); 
       imageView.setDrawingCacheEnabled(true); 
       Bitmap b = imageView.getDrawingCache(); 
       photoUtils.insertImage(Full_Screen_Slider.this.getContentResolver(), 
        b, "1image", "this is downloaded image sample"); 
       Toast.makeText(mContext, "longpress ", Toast.LENGTH_SHORT).show(); 

       return true; 
      } 
     }); 

     container.addView(itemView); 

     return itemView; 
    } 

它替換你的看法每次它調用instantiateItem，所以最終它會有所幫助。