使用SimpleCursorAdapter和ViewBinder在ListView项目中设置图像

Question

Is there a way I could set an image to an ImageView inside a ListView ? In this, I am using a SimpleCursorAdapter to display all the fields and using a ViewBinder to set the image bitmap to the ImageView . The image is downloaded using an AsyncTask . The code that I have written is provided below:

    private void updateTimelineUI() {
        Cursor data = dbHelper.query(Constants.TABLE_NAME, null, null);
        if (data.moveToFirst()) {
            adapter = new SimpleCursorAdapter(this, R.layout.tweet_row, data, new String[] {Constants.CREATED_TIME, Constants.USERNAME, Constants.PROFILE_IMAGE, Constants.TWEET}, new int[] {R.id.time, R.id.username, R.id.userImageView, R.id.tweetMessage});
            SimpleCursorAdapter.ViewBinder viewBinder = new SimpleCursorAdapter.ViewBinder() {
                public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
                    if(view != null && view.getId() != R.id.userImageView) {
                        return false;
                    }
                String imageUrlString = cursor.getString(columnIndex);
                String username = cursor.getString(cursor.getColumnIndex(Constants.USERNAME));
                String path = getDir("images", MODE_PRIVATE).getAbsolutePath() + "/" + username + ".png";
                ImageDownloader downloader = new ImageDownloader();
                downloader.setImageUrlString(imageUrlString);
                downloader.setImageView(view);
                downloader.setFilePath(path);
                downloader.execute(imageUrlString);
                return true;
                }
            };
            int index = data.getColumnIndex(Constants.PROFILE_IMAGE);
            //Log.d(Constants.TAG, "" + index);
            adapter.setViewBinder(viewBinder);
            viewBinder.setViewValue(userImageView, data, index);
            timelineList.setAdapter(adapter);
        }
    }

Is there a way to set the image to the correct row with this method?

With the code that I currently have, the images are downloaded successfully. However, the images are being set randomly.

Answer 1

I created a custom class that inherits from SimpleCursorAdapter , like Serdar Dogruyol mentions. Inside this custom class I @Override bindView . Inside bindView I call the super , then get a handle to my ImageView using view.findViewById , with view being one of the parameters passed into bindView .

Answer 2

您应该创建自己的适配器，该适配器将继承自SimpleCursorAdapter，因此您可以使用自定义设计制作自己的ListView项目，并为其设置自定义布局，您可以在其中添加所需的任何Ui元素，包括ImageView