Wie bekomme ich bestimmte Kinder aus einem Expandable Listview?

Question

Ich arbeite an einer Android-Anwendung für Bestellungen, und ich habe eine Aktivität mit einer erweiterbaren ListView, die ich durch Parsen einer JSON-Datei bevölkern. Jetzt habe ich in jeder Zeile der Expandable ListView ein EditText Feld zur Eingabe des Betrags, und auf einen Button klicken möchte ich alle Kinder, die einen Wert ungleich 0 haben in diesem EditText Feld, und die Daten in eine Datenbank legen (für die Produkte und die Menge, die bestellt wurde).

Ich würde eine Hilfe brauchen, um eine Funktion zu erstellen, um diese Elemente zu bekommen, seit ich damit kürzlich gekämpft habe. Hier ist mein Code

erweiterbare Liste Adapter:

public class ExpandableListAdapter extends BaseExpandableListAdapter { 

    private Context _context; 
    private List<String> _listDataHeader; // header titles 
    // child data in format of header title, child title 
    private HashMap<String, List<Artikl>> _listDataChild; 

    public ExpandableListAdapter(Context context, List<String> 
listDataHeader, 
           HashMap<String, List<Artikl>> 
listChildData) { 
     this._context = context; 
     this._listDataHeader = listDataHeader; 
     this._listDataChild = listChildData; 
    } 

    @Override 
    public Object getChild(int groupPosition, int childPosititon) { 
     return 
this._listDataChild.get(this._listDataHeader.get(groupPosition)) 
       .get(childPosititon); 
    } 

    @Override 
    public long getChildId(int groupPosition, int childPosition) { 
     return childPosition; 
    } 

    public int getChildAmount(int groupPosition, int childPosition,View 
    convertView) { 

     int kolicina; 
     if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this._context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.list_item, null); 
     } 

     EditText amount = (EditText) 
convertView.findViewById(R.id.editText); 
     kolicina=Integer.parseInt(amount.getText().toString()); 

     return kolicina; 


    } 

    @Override 
    public View getChildView(int groupPosition, final int childPosition, 
          boolean isLastChild, View convertView, 
ViewGroup 
    parent) { 

     final Artikl child = (Artikl) getChild(groupPosition, 
childPosition); 
     final String childText = child.getNaziv(); 


     if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this._context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.list_item, null); 
     } 

     TextView txtListChild = (TextView) convertView 
       .findViewById(R.id.from_name); 


     txtListChild.setText(childText); 
     return convertView; 
    } 



    @Override 
    public int getChildrenCount(int groupPosition) { 
     return 
this._listDataChild.get(this._listDataHeader.get(groupPosition)) 
       .size(); 
    } 

    @Override 
    public Object getGroup(int groupPosition) { 
     return this._listDataHeader.get(groupPosition); 
    } 

    @Override 
    public int getGroupCount() { 
     return this._listDataHeader.size(); 
    } 

    @Override 
    public long getGroupId(int groupPosition) { 
     return groupPosition; 
    } 

    @Override 
    public View getGroupView(int groupPosition, boolean isExpanded, 
          View convertView, ViewGroup parent) { 
     String headerTitle = (String) getGroup(groupPosition); 
     if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this._context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.list_group, null); 
     } 

     TextView lblListHeader = (TextView) convertView 
       .findViewById(R.id.lblListHeader); 
     lblListHeader.setTypeface(null, Typeface.BOLD); 
     lblListHeader.setText(headerTitle); 

     return convertView; 
    } 

    @Override 
    public boolean hasStableIds() { 
     return false; 
    } 

    @Override 
    public boolean isChildSelectable(int groupPosition, int childPosition) { 
     return true; 
    }} 

List_item.xml

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
    android:orientation="vertical" 
    android:paddingTop="2.5dp" 
    android:paddingBottom="2.5dp" 
    android:paddingLeft="5dp" 
    android:paddingRight="5dp"> 

    <RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:background="#fff" 
     android:orientation="horizontal" 
     android:padding="10dp" > 



     <TextView 
      android:id="@+id/from_name" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentTop="true" 
      android:layout_toRightOf="@+id/thumbnail" 
      android:text="Pineapple" 
      android:textColor="#040404" 
      android:textSize="15dip" 
      android:typeface="sans" /> 

     <LinearLayout 
      android:id="@+id/cart_plus_minus_layout" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_below="@+id/from_name" 
      android:orientation="horizontal" 
      android:weightSum="1"> 


      <TextView 
       android:id="@+id/cena_view" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_gravity="center_horizontal|center_vertical" 
       android:paddingRight="25dip" 
       android:text="100 gm" 
       android:textColor="#343434" 
       android:textSize="12dip" /> 

      <TextView 
       android:text="Amount" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView" /> 

      <EditText 
     android:layout_width="48dp" 
     android:layout_height="66dp" 
     android:inputType="textPersonName" 
       android:ems="10" 
     android:layout_alignParentBottom="true" 
     android:layout_toRightOf="@+id/from_name" 
     android:layout_toEndOf="@+id/from_name" 
     android:layout_marginLeft="21dp" 
     android:layout_marginStart="21dp" 
     android:id="@+id/editText" 
     android:layout_weight="0.08" 
       android:hint="0" 
       android:text="0" /> 

     </LinearLayout> 

     </RelativeLayout> 

     </LinearLayout> 

ListGroup.xml

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" 
    android:padding="8dp" 
    android:background="#0a2859"> 


    <TextView 
     android:id="@+id/lblListHeader" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="? 
    android:attr/expandableListPreferredItemPaddingLeft" 
     android:textSize="17dp" 
     android:textColor="#ffffff" /> 

    </LinearLayout> 

Bestellen Aktivität Layout:

<?xml version="1.0" encoding="utf-8"?> 
    <RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:background="#f4f4f4" > 

    <TextView android:layout_width="fill_parent" 
     android:layout_height="70dp" 
     android:id="@+id/market_dolg" 
     android:background="#8090aa" 
     android:textColor="@android:color/white" 
     android:textSize="18dp" 
     android:text="Hello!" 
     android:gravity="center"/> 

    <ExpandableListView 
     android:id="@+id/lvExp" 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent" 
     android:layout_below="@id/market_dolg" 
     android:layout_weight="1"/> 


    <Button 
    android:layout_width="wrap_content" 
    android:layout_height="50dp" 
    android:layout_below="@id/lvExp" 
    android:id="@+id/otkazi" 
    android:background="#9ea6a8" 
    android:textColor="@android:color/white" 
    android:textSize="18dp" 
    android:text="Cancel Order" 
    android:onClick="Otkazi_nar" 
    android:gravity="center" 
    android:layout_alignParentLeft="true" 
    android:orientation="horizontal" 

    /> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="50dp" 
     android:layout_below="@id/lvExp" 
     android:id="@+id/order" 
     android:background="#3fa5ba" 
     android:textColor="@android:color/white" 
     android:textSize="18dp" 
     android:text="Order" 
     android:gravity="center" 
     android:layout_alignParentRight="true" 
     android:orientation="horizontal" 

     /> 

    </RelativeLayout> 

Sortieren Aktivität Java-Code:

public class Order extends Activity { 


private static final String TAG = Order.class.getSimpleName(); 
private static final String url = "artikli.json"; 
ExpandableListAdapter listAdapter; 
ExpandableListView expListView; 
List<String> listDataHeader; 
public List<Artikl> voda = new ArrayList<Artikl>(); 
public List<Artikl> sok = new ArrayList<Artikl>(); 

HashMap<String, List<Artikl>> listDataChild; 

Button button; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_naracka); 

    // get the listview 
    expListView = (ExpandableListView) findViewById(R.id.lvExp); 

    // preparing list data 
    prepareListData(); 

    listAdapter = new ExpandableListAdapter(this, listDataHeader, 
listDataChild); 

    // setting list adapter 
    expListView.setAdapter(listAdapter); 

    // Listview Group click listener 
    expListView.setOnGroupClickListener(new OnGroupClickListener() { 

     @Override 
     public boolean onGroupClick(ExpandableListView parent, View v, 
            int groupPosition, long id) { 

      return false; 
     } 
    }); 


} 

/* 
* Preparing the list data 
*/ 
private void prepareListData() { 
    listDataHeader = new ArrayList<String>(); 
    listDataChild = new HashMap<String, List<Artikl>>(); 

    // Adding child data 
    listDataHeader.add("Вода"); 
    listDataHeader.add("Сок"); 


    // Adding child data 

    JsonArrayRequest Req = new JsonArrayRequest(url, 
      new Response.Listener<JSONArray>() { 
       @Override 
       public void onResponse(JSONArray response) { 
        Log.d(TAG, response.toString()); 


        // Parsing json 
        for (int i = 0; i < response.length(); i++) { 
         try { 

          JSONObject obj = response.getJSONObject(i); 
          String sifra = obj.getString("sifra"); 

          if (sifra.equals("1")) { 
           Artikl artikl = new Artikl(); 
           artikl.setNaziv(obj.getString("naziv")); 
           artikl.setCena(obj.getInt("cena")); 

           artikl.setSifra(sifra); 
           artikl.setEdm(obj.getString("edm")); 

           voda.add(artikl); 
          } 

         } catch (JSONException e) { 
          e.printStackTrace(); 
         } 

        } 

       } 
      }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError error) { 
      VolleyLog.d(TAG, "Error: " + error.getMessage()); 


     } 
    }); 

    // Adding request to request queue 
    AppController.getInstance().addToRequestQueue(Req); 


    JsonArrayRequest Req1 = new JsonArrayRequest(url, 
      new Response.Listener<JSONArray>() { 
       @Override 
       public void onResponse(JSONArray response) { 
        Log.d(TAG, response.toString()); 


        // Parsing json 
        for (int i = 0; i < response.length(); i++) { 
         try { 

          JSONObject obj = response.getJSONObject(i); 
          String sifra = obj.getString("sifra"); 
          if (sifra.equals("2")) { 
           Artikl artikl1 = new Artikl(); 
           artikl1.setNaziv(obj.getString("naziv")); 
           artikl1.setCena(obj.getInt("cena")); 
           artikl1.setSifra(obj.getString("sifra")); 
           artikl1.setEdm(obj.getString("edm")); 

           sok.add(artikl1); 
          } 

         } catch (JSONException e) { 
          e.printStackTrace(); 
         } 

        } 

       } 
      }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError error) { 
      VolleyLog.d(TAG, "Error: " + error.getMessage()); 


     } 
    }); 

    AppController.getInstance().addToRequestQueue(Req1); 


    listDataChild.put(listDataHeader.get(0), voda); 
    listDataChild.put(listDataHeader.get(1), sok); 


}} 

und das Modell (Artikl.java) nur Get und Methoden Set

Answer 1

In getChildView Methode des Adapters hinzufügen addTextChangedListener EditText und in afterTextChanged Methode speichern Text eingeben in der Datenbank, wenn Sie wollen nur Zahlen dann beschränken Sie die Tastatur Nummer

mEtReference.addTextChangedListener(new TextWatcher() { 
     @Override 
     public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { 
     } 

     @Override 
     public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { 

     } 

     @Override 
     public void afterTextChanged(Editable editable) { 
      if (editable.length() > 0) { 
       int value = Integer.parseInt(editable + ""); 
       // save value 
      } 
     } 
    });