在 ParseQueryAdapter 中，我想返回我正在查询的对象的关系。这是我目前所拥有的；我正在执行查询，检索当前用户创建的所有目标；在 public View getItemView 中，我开始获取对象(目标)的关系。我会创建一个 for 循环，并将结果存储在一个数组中吗？如果是这样，我该如何设置列表中的文本？非常感谢您的帮助!
public class GoalDetailViewAdapter extends ParseQueryAdapter<ParseObject> {
protected ParseObject mPracticeName;
public GoalDetailViewAdapter(Context context) {
super(context, new ParseQueryAdapter.QueryFactory<ParseObject>() {
public ParseQuery create() {
// Here we can configure a ParseQuery to display
// midwives
ParseQuery<ParseObject> query = ParseQuery.getQuery("goal");
query.whereEqualTo("createdby", ParseUser.getCurrentUser());
return query;
}
});
}
@Override
public View getItemView(ParseObject object, View view, final ViewGroup parent) {
if (view == null) {
view = View.inflate(getContext(), R.layout.activity_goal_detail_view, null);
}
//use midwifefirm as item view/list
super.getItemView(object, view, parent);
// find in layout the practice name
TextView titleTextView = (TextView) view.findViewById(R.id.goalname);
//in the midwifefirm data model, call getPracticename
titleTextView.setText(object.getString("goalname"));
TextView practiceTextView = (TextView) view.findViewById(R.id.practicename);
ParseRelation relation = object.getRelation("practicerelation");
relation.getQuery().findInBackground(new FindCallback() {
@Override
public void done(List list, ParseException e) {
if (e !=null) {
//error
}
else {
}
}
});
/*mAddGoal = (ImageButton) view.findViewById(R.id.addgoal);
mAddGoal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(parent.getContext(), AddGoal.class);
v.getContext().startActivity(intent);
}
});*/
return view;
最佳答案
好的，现在我了解了您的情况，我准备好给出答案了。
您需要做的(至少在我看来)是改变您与指针数组的关系。只要您不存储超过数百个指针，那么此设计应该不会出现明显的性能问题。
拥有指向关系的指针数组的巨大好处是它们可以直接包含在查询中。
现在你可以这样做:
public class GoalDetailViewAdapter extends ParseQueryAdapter<ParseObject> {
protected ParseObject mPracticeName;
public GoalDetailViewAdapter(Context context) {
super(context, new ParseQueryAdapter.QueryFactory<ParseObject>() {
public ParseQuery create() {
// Here we can configure a ParseQuery to display
// midwives
ParseQuery<ParseObject> query = ParseQuery.getQuery("goal");
query.whereEqualTo("createdby", ParseUser.getCurrentUser());
// now all the pointers will be populated with data
// once the query returns
query.include("practicerelation");
return query;
}
});
}
@Override
public View getItemView(ParseObject object, View view, final ViewGroup parent) {
if (view == null) {
view = View.inflate(getContext(), R.layout.activity_goal_detail_view, null);
}
//use midwifefirm as item view/list
super.getItemView(object, view, parent);
// find in layout the practice name
TextView titleTextView = (TextView) view.findViewById(R.id.goalname);
//in the midwifefirm data model, call getPracticename
titleTextView.setText(object.getString("goalname"));
TextView practiceTextView = (TextView) view.findViewById(R.id.practicename);
// now you can iterate the practices directly
// note that this is not async no more
List<ParseObject> practices = object.getList("practicerelation")
StringBuilder b = new StringBuilder();
for (ParseObject practice: practices) {
// assuming you have a 'step' col
// this is just for the sake of example
String step = practice.getString("step");
b.append(step);
b.append(",");
}
practiceTextView.setText(b.toString());
return view;
关于android - 解析，安卓； ParseQuery 适配器中的 relation.getQuery()，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30111099/