Question

在我的应用程序中，我想从图库中选择图像并在ImageView中显示图像，并且还想将图像移动到新文件夹。我在ImageView中获得了图像，但它没有移动到另一个文件夹。谁能帮我？我用下面的代码来实现这个....

 button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.setType("image/*");
            startActivityForResult(intent, 1); 

        }
    });

在onActivityResult

   @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };

        System.out.println("File Path Column "+filePathColumn);

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        System.out.println("Column Index "+columnIndex);
        picturePath = cursor.getString(columnIndex);
        cursor.close();
        //imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

        BitmapFactory.Options options=new BitmapFactory.Options();
        options.inSampleSize = 3;
        Bitmap preview_bitmap=BitmapFactory.decodeFile(picturePath,options);
        System.out.println("Image patha in Messaging "+picturePath);
        imageView.setImageBitmap(preview_bitmap);
        differentpic.setText("Click on Upload if you wish to solve a different pic");
        differentpic.setPadding(0, 0, 0, 30);

        OutputStream out;
        File direct = new File(Environment.getExternalStorageDirectory()
                + "/Solve");

        if (!direct.exists()) {
            direct.mkdirs();
        }
        File file = new File(Environment.getExternalStorageDirectory()+ "/Solve"+String.valueOf(System.currentTimeMillis())+"jpg");
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        try {
        file.createNewFile();
        out = new FileOutputStream(file);                       
        //Bitmap bmp = intent.getExtras().get("data");
        //ByteArrayOutputStream stream = new ByteArrayOutputStream();

        int bytes = preview_bitmap.getByteCount();
      //or we can calculate bytes this way. Use a different value than 4 if you don't use 32bit images.
      //int bytes = b.getWidth()*b.getHeight()*4; 

      ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
      preview_bitmap.copyPixelsToBuffer(buffer); //Move the byte data to the buffer

      byte[] array = buffer.array();


            out.write(array);
            out.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        // TODO Auto-generated catch block


    }

 }

我做错了什么？

提前致谢

Answer 1

如果你有文件sourceFile和destinationFile的路径，那么你可以使用以下代码复制文件。

/**
 * copies content from source file to destination file
 * 
 * @param sourceFile
 * @param destFile
 * @throws IOException
 */
private void copyFile(File sourceFile, File destFile) throws IOException {
    if (!sourceFile.exists()) {
        return;
    }

    FileChannel source = null;
    FileChannel destination = null;
    source = new FileInputStream(sourceFile).getChannel();
    destination = new FileOutputStream(destFile).getChannel();
    if (destination != null && source != null) {
        destination.transferFrom(source, 0, source.size());
    }
    if (source != null) {
        source.close();
    }
    if (destination != null) {
        destination.close();
    }

}

Answer 2

检查以下代码

 private OnClickListener photoAlbumListener = new OnClickListener(){
      @Override
      public void onClick(View arg0) {
        Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
        imagepath = Environment.getExternalStorageDirectory()+"/sharedresources/"+HelperFunctions.getDateTimeForFileName()+".png";
        uriImagePath = Uri.fromFile(new File(imagepath));
        photoPickerIntent.setType("image/*");
        photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT,uriImagePath);
        photoPickerIntent.putExtra("outputFormat",Bitmap.CompressFormat.PNG.name());
        photoPickerIntent.putExtra("return-data", true);
        startActivityForResult(photoPickerIntent, REQUEST_CODE_CHOOSE_PICTURE_FROM_GALLARY);

      }
  };






  protected void onActivityResult(int requestCode, int resultCode, Intent data) {


       if (resultCode == RESULT_OK) {
            switch(requestCode){


             case 22:
                    Log.d("onActivityResult","uriImagePath Gallary :"+data.getData().toString());
                    Intent intentGallary = new Intent(mContext, ShareInfoActivity.class);
                    intentGallary.putExtra(IMAGE_DATA, uriImagePath);
                    intentGallary.putExtra(TYPE, "photo");
                    File f = new File(imagepath);
                    if (!f.exists())
                    {
                        try {
                            f.createNewFile();
                            copyFile(new File(getRealPathFromURI(data.getData())), f);
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }

                    startActivity(intentGallary);
                    finish();
             break;


            }
          }





    }

   private void copyFile(File sourceFile, File destFile) throws IOException {
        if (!sourceFile.exists()) {
            return;
        }

        FileChannel source = null;
            FileChannel destination = null;
            source = new FileInputStream(sourceFile).getChannel();
            destination = new FileOutputStream(destFile).getChannel();
            if (destination != null && source != null) {
                destination.transferFrom(source, 0, source.size());
            }
            if (source != null) {
                source.close();
            }
            if (destination != null) {
                destination.close();
            }


}

private String getRealPathFromURI(Uri contentUri) {

   String[] proj = { MediaStore.Video.Media.DATA };
   Cursor cursor = managedQuery(contentUri, proj, null, null, null);
   int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
   cursor.moveToFirst();
   return cursor.getString(column_index);
}

在Gallery中将图像从一个文件夹复制到另一个文件夹

2 个答案: