从FirebaseDatabase获取的数据将显示在3个单独的AlertDialog中，而不是一个 [英] Data fetched from FirebaseDatabase is getting shown in 3 separate AlertDialogs instead of one

问题描述

我从 FirebaseDatabase 获取一些数据，然后将它们放入数组中，然后尝试显示它们在一个自定义 AlertDialog 中的 List 。

以下是代码：

  query = mDatabase.child（child）。child（anotherChild）.child（yetAnotherChild ）; 
 
 uProfile.setOnClickListener（new View.OnClickListener（）{
 @Override 
 public void onClick（View view）{
 query.orderByChild（someChild）。 addChildEventListener（new ChildEventListener（）{
 @Override 
 public void onChildAdded（DataSnapshot dataSnapshot，String s）{$ b $ if（dataSnapshot！= null）{
 
 Map< String，String> newD =（Map< String，String>）dataSnapshot.getValue（）; 
 
 ArrayList< String> l = new ArrayList< String>（$; 
 l.add （）; 
 
字符串名称alertDialog = new AlertDialog.Builder（Activity.this）; 
 LayoutInflater inflater = getLayoutInflater（）; 
查看convertView = inflater.inflate（R.layout.dialog_list，null）; 
 alertDialog.setView（convertView）; 
 alertDialog.setTitle（title）; 
 ListView lv =（ListView）convertView.findViewById（R.id.lv）; 
 ArrayAdapter< String> adapter = new ArrayAdapter< String>（getBaseContext（），android.R.layout.simple_list_item_1，names）; 
 lv.setAdapter（adapter）; 
 
 alertDialog.setPositiveButton（OK，new DialogInterface.OnClickListener（）{
 @Override 
 public void onClick（DialogInterface dialogInterface，int i）{
 
} 
}）; 
 
 alertDialog.show（）; 
} else {
 Toast.makeText（getBaseContext（），NULLLLL，Toast.LENGTH_SHORT）.show（）; 
} 
} 
 
 ... 
 ... 
}）; 
 
} 
}）; 
  

以下是数据库结构：

<$ p $ app
-child
-anotherChild
-yetAnotherChild
-inaccessibleChild
-someChild：value
-lol： value


我无法使用 valueEventListener（）在这里，因为我没有访问 inaccessibleChild 。 inaccessibleChild 这里是其他用户的 uid 。我怎样才能访问 uid ？

问题在于数据正在被抓取但不是在 AlertDialog 列表中显示，而是在 3 单独的 AlertDialog 。

这里出了什么问题？

请让我知道。

<上面的答案都没有帮助，尽管Linxy的回答是正确的，但我在解决问题后看到了这个答案。

把所有的代码移出来，只写这行： alertDialog.show（）; 里面 setOnClickListener（）改进我的代码：

  query = mDatabase.child（child ）.child（anotherChild）.child（ yetAnotherChild）; 
 
 query.orderByChild（someChild）。addChildEventListener（new ChildEventListener（）{
 @Override $ b $ public void onChildAdded（DataSnapshot dataSnapshot，String s）{
 if （dataSnapshot！= null）{
 
 Map< String，String> newD =（Map< String，String>）dataSnapshot.getValue（）; 
 
 ArrayList< String> l = new ArrayList< String>（）; 
 l.add（newD.get（lol）。substring（30））; 
 
 String names [] = l.toArray（new String [0]）; 
 
 AlertDialog.Builder alertDialog = new AlertDialog.Builder（Activity.this）; 
 LayoutInflater inflater = getLayoutInflater（）; 
查看convertView = inflater.inflate （R.layout.dialog_list，null）; 
 alertDialog.setView（convertView）; 
 aler tDialog.setTitle（ 标题）; 
 ListView lv =（ListView）convertView.findViewById（R.id.lv）; 
 ArrayAdapter< String> adapter = new ArrayAdapter< String>（getBaseContext（），android.R.layout.simple_list_item_1，names）; 
 lv.setAdapter（adapter）; 
 
 alertDialog.setPositiveButton（OK，new DialogInterface.OnClickListener（）{
 @Override 
 public void onClick（DialogInterface dialogInterface，int i）{
 
} 
}）; 
} else {
 Toast.makeText（getBaseContext（），NULLLLL，Toast.LENGTH_SHORT）.show（）; 
} 
} 
 
 ... 
 ... 
}）; 
 
 uProfile.setOnClickListener（new View.OnClickListener（）{
 @Override 
 public void onClick（View view）{
 alert11.show（）; 
} 
}）; 
  

无论如何，我要感谢所有回答这个问题的人。

和平。

I'm fetching some data from FirebaseDatabase and then putting them into an array and then trying to show them in a List which is in a custom AlertDialog.

Here's the code:

query = mDatabase.child("child").child(anotherChild).child("yetAnotherChild");

uProfile.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        query.orderByChild("someChild").addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                if (dataSnapshot != null) {

                    Map<String, String> newD = (Map<String, String>) dataSnapshot.getValue();

                    ArrayList<String> l = new ArrayList<String>();
                    l.add(newD.get("lol").substring(30));

                    String names[] = l.toArray(new String[0]);

                    AlertDialog.Builder alertDialog = new AlertDialog.Builder(Activity.this);
                    LayoutInflater inflater = getLayoutInflater();
                    View convertView = inflater.inflate(R.layout.dialog_list, null);
                    alertDialog.setView(convertView);
                    alertDialog.setTitle("title");
                    ListView lv = (ListView) convertView.findViewById(R.id.lv);
                    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1, names);
                    lv.setAdapter(adapter);

                    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {

                        }
                    });

                    alertDialog.show();
                } else {
                    Toast.makeText(getBaseContext(), "NULLLLL", Toast.LENGTH_SHORT).show();
                }
            }

            ...
            ...
        });

    }
});

Here's the database structure:

app
 -child
   -anotherChild
     -yetAnotherChild
       -inaccessibleChild
         -someChild: "value"
         -lol: "value"

I can't use valueEventListener() here as I have no access to inaccessibleChild. The inaccessibleChild here is the uid of the other users who followed a particular user. How can I access there uid?

The problem is that data is getting fetched but instead of getting shown in a list in one AlertDialog, it is getting shown one-by-one in 3 separate AlertDialog.

What is going wrong here?

Please let me know.

解决方案

Well, none of the above answers really helped, though Linxy's answer is correct, I saw it after solving the probelm.

Moving all the code out and writing just this line: alertDialog.show(); inside setOnClickListener() improving my code to this:

    query = mDatabase.child("child").child(anotherChild).child("yetAnotherChild");

    query.orderByChild("someChild").addChildEventListener(new ChildEventListener() {
                @Override
                public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                    if (dataSnapshot != null) {

                        Map<String, String> newD = (Map<String, String>) dataSnapshot.getValue();

                        ArrayList<String> l = new ArrayList<String>();
                        l.add(newD.get("lol").substring(30));

                        String names[] = l.toArray(new String[0]);

                        AlertDialog.Builder alertDialog = new AlertDialog.Builder(Activity.this);
                        LayoutInflater inflater = getLayoutInflater();
                        View convertView = inflater.inflate(R.layout.dialog_list, null);
                        alertDialog.setView(convertView);
                        alertDialog.setTitle("title");
                        ListView lv = (ListView) convertView.findViewById(R.id.lv);
                        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1, names);
                        lv.setAdapter(adapter);

                        alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {

                            }
                        });
                    } else {
                        Toast.makeText(getBaseContext(), "NULLLLL", Toast.LENGTH_SHORT).show();
                    }
                }

                ...
                ...
            });

uProfile.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        alert11.show();
    }
});

Anyway, I would like to thank all those who answered this question.

Peace.

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