我的ListView中有一个继承自parse.com数据库的ParseImageView。但android studio表示它无法解析ProgressCallback方法。 代码：
@Override
public View getItemView(Campaign campaign, View v, ViewGroup parent) {
if (v == null) {
v = View.inflate(getContext(), R.layout.list_single, null);
}
super.getItemView(campaign, v, parent);
ParseImageView mealImage = (ParseImageView) v.findViewById(android.R.id.icon);
progressBar = (ProgressBar) v.findViewById(R.id.progressBar);
ParseFile photoFile = campaign.getImage();
if (photoFile != null) {
mealImage.setParseFile(campaign.getImage());
mealImage.loadInBackground(new GetDataCallback() {
@Override
public void done(byte[] data, ParseException e) {
// nothing to do
}
}
, new ProgressCallback() {
@Override
public void done(Integer percentDone) {
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(percentDone);
}
}
)
}
if (photoFile == null) {
mealImage.setImageResource(R.drawable.default_icon);
}
TextView titleTextView = (TextView) v.findViewById(R.id.title);
titleTextView.setText(campaign.getTitle());
TextView descriptionTextView = (TextView) v
.findViewById(R.id.description);
descriptionTextView.setText(campaign.getDescription());
return v;
}
我得Cannot resolve method loadInBackground(anonymous com.parse.getDataCallback, anonymous com.parse.ProgressCallback)
那么，loadInBackground()不包含ProgressCallback吗？如果是这样，我如何根据加载量来设置进度条的百分比？