Android-Добавление элементов в spinner из listview

Question

Я пытаюсь добавить элементы из списка-списка в spinner.My first Activity содержит list-view. Я использую кнопку каждый раз, когда вставлена ​​новая запись строки, использующая базу данных SQLite в моих действиях ListView, и каждая строка правильно добавляет в список. А еще у меня есть счетчик во второй активности.

И я хочу добавить каждый элемент list_view в spinner во вторую активность.

Это мой продукт класса Список адаптер:

public class Product_List_Adapter extends BaseAdapter 
    { 
     @SuppressWarnings("unused") 
     private Context mContext; 
     private ArrayList<String> Productid_ArrayList; 
     private ArrayList<String> ProductName_ArrayList; 
     private ArrayList<String> ProductDescription_ArrayList; 


     public Product_List_Adapter(Context mContext, 
       ArrayList<String> productid_ArrayList, 
       ArrayList<String> productName_ArrayList, 
       ArrayList<String> productDescription_ArrayList) 
     { 
      super(); 
      this.mContext = mContext; 
      Productid_ArrayList = productid_ArrayList; 
      ProductName_ArrayList = productName_ArrayList; 
      ProductDescription_ArrayList = productDescription_ArrayList; 
     } 




     @Override 
     public int getCount() { 
      // TODO Auto-generated method stub 
      return Productid_ArrayList.size(); 
     } 

     @Override 
     public Object getItem(int position) { 
      // TODO Auto-generated method stub 
      return position; 
     } 

     @Override 
     public long getItemId(int position) { 
      // TODO Auto-generated method stub 
      return position; 
     } 

     @Override 
     public View getView(int pos, View child, ViewGroup parent) { 
      // TODO Auto-generated method stub 
      Holder mHolder; 
      LayoutInflater layoutInflater; 

      if(child == null) 
      { 
       layoutInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       child = layoutInflater .inflate(R.layout.define_products_listrow, null); 
       mHolder = new Holder(); 
       mHolder.txt_product_id = (TextView)child.findViewById(R.id.txt_ProductId); 
       mHolder.txt_product_name = (TextView)child.findViewById(R.id.txt_ProductName); 
       mHolder.txt_product_description = (TextView)child.findViewById(R.id.txt_ProductDescr); 

       child.setTag(mHolder); 
      } 
      else 
      { 
       mHolder = (Holder) child.getTag(); 
      } 

      mHolder.txt_product_id.setText(Productid_ArrayList.get(pos)); 
      mHolder.txt_product_name.setText(ProductName_ArrayList.get(pos)); 
      mHolder.txt_product_description.setText(ProductDescription_ArrayList.get(pos)); 

      return child; 
     } 

     public class Holder { 
      TextView txt_product_id; 
      TextView txt_product_name; 
      TextView txt_product_description; 
     } 
    } 





The ProductDefine Sctivity which is contain Listview 



public class DefineProducts_Activity6 extends Activity { 

    String log; 
    List<String> list_Dataset; 
    String[] str_Splitup1; 
    String[] str_Splitup2; 
    String[] str_Splitup3; 

    Product_List_Adapter disadpt; 
    //public ArrayAdapter<String> adapter; 

    private com.db_mgmt.DbHelper mHelper; 
    private SQLiteDatabase dataBase; 

    private static ArrayList<String> products_Id_ArrayList = new ArrayList<String>(); 
    private static ArrayList<String> products_Name_ArrayList = new ArrayList<String>(); 
    private static ArrayList<String> products_Details_ArrayList = new ArrayList<String>(); 

    private ListView products_List; 
    private AlertDialog.Builder build; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.define_products_listview); 

     products_List = (ListView) findViewById(R.id.products_List); 
     mHelper = new DbHelper(this); 


     //add new record 
     findViewById(R.id.btnAdd_DefineProduct).setOnClickListener(new OnClickListener() { 

      public void onClick(View v) { 

       Intent i = new Intent(getApplicationContext(), 
         Add_Define_Product.class); 

       i.putExtra("update", false); 
       startActivity(i); 

      } 
     }); 


     //click to update data 
     products_List.setOnItemClickListener(new OnItemClickListener() { 

      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, 
        long arg3) { 

       Intent i = new Intent(getApplicationContext(), 
         Add_Define_Product.class); 
       i.putExtra("productsName", products_Name_ArrayList.get(arg2)); 
       i.putExtra("productsDetails", products_Details_ArrayList.get(arg2)); 
       i.putExtra("productsID", products_Id_ArrayList.get(arg2)); 
       i.putExtra("update", true); 
       startActivity(i); 

      } 
     }); 


     //long click to delete data 
     products_List.setOnItemLongClickListener(new OnItemLongClickListener() { 

      public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
        final int arg2, long arg3) { 

       build = new AlertDialog.Builder(DefineProducts_Activity6.this); 
       build.setTitle("Delete " + products_Name_ArrayList.get(arg2) + " " 
         + products_Details_ArrayList.get(arg2)); 
       build.setMessage("Do you want to delete ?"); 
       build.setPositiveButton("Yes", 
         new DialogInterface.OnClickListener() { 

          public void onClick(DialogInterface dialog, 
            int which) { 

           Toast.makeText(
             getApplicationContext(), 
             products_Name_ArrayList.get(arg2) + " " 
               + products_Details_ArrayList.get(arg2) 
               + " is deleted.", Toast.LENGTH_LONG).show(); 

           dataBase.delete(
             DbHelper.TABLE_DEFINE_PRODUCT_NAME, 
             DbHelper.KEY_ID + "=" 
               + products_Id_ArrayList.get(arg2), null); 
           displayData(); 
           dialog.cancel(); 
          } 
         }); 

       build.setNegativeButton("No", 
         new DialogInterface.OnClickListener() { 

          public void onClick(DialogInterface dialog, 
            int which) { 
           dialog.cancel(); 
          } 
         }); 
       AlertDialog alert = build.create(); 
       alert.show(); 

       return true; 
      } 
     }); 
    } 



    @Override 
    protected void onResume() { 
     displayData(); 
     super.onResume(); 
    } 

    /** 
    * displays data from SQLite 
    */ 
    private void displayData() { 
     dataBase = mHelper.getWritableDatabase(); 
     Cursor mCursor = dataBase.rawQuery("SELECT * FROM " 
       + DbHelper.TABLE_DEFINE_PRODUCT_NAME, null); 

     products_Id_ArrayList.clear(); 
     products_Name_ArrayList.clear(); 
     products_Details_ArrayList.clear(); 


     if (mCursor.moveToFirst()) 
     { 
      do 
      { 
       products_Id_ArrayList.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_ID))); 
       products_Name_ArrayList.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_PRODUCTS_NAME))); 
       products_Details_ArrayList.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_PRODUCTS_DETAILS))); 

      } while (mCursor.moveToNext()); 
     } 


     SharedPreferences spdata = 
      PreferenceManager.getDefaultSharedPreferences(this); 
     String strDataSet1 = spdata.getString("LISTS_ID",","); 
     String strDataSet2 = spdata.getString("LISTS_NAME", ""); 
     String strDataSet3 = spdata.getString("LISTS_Detail", ""); 


     Log.e(log,strDataSet1); 
     Log.e(log,strDataSet2); 
     Log.e(log,strDataSet3); 

     list_Dataset = Arrays.asList(strDataSet1.split(",")); 
     list_Dataset = Arrays.asList(strDataSet3.split(",")); 
     list_Dataset = Arrays.asList(strDataSet2.split(",")); 

     str_Splitup1 = strDataSet1.split(","); 
     str_Splitup2 = strDataSet2.split(","); 
     str_Splitup3 = strDataSet3.split(","); 


     List<String> items1 = Arrays.asList(strDataSet1.split(",")); 
     List<String> items2 = Arrays.asList(strDataSet2.split(",")); 
     List<String> items3 = Arrays.asList(strDataSet3.split(",")); 

     ArrayList<String> itemsarraylist = new ArrayList<String>(); 

     for (int j = 0; j < items2.size(); j++) 
     { 
      itemsarraylist.add(j, items2.get(j)); 

     } 


disadpt = new Product_List_Adapter(DefineProducts_Activity6.this,products_Id_ArrayList, products_Name_ArrayList, products_Details_ArrayList); 
     products_List.setAdapter(disadpt); 
     disadpt.notifyDataSetChanged(); 
     mCursor.close(); 
    } 



} 

Answer 1

Это arrayList

ArrayList<HashMap<String, String>> rssItemList = new ArrayList<HashMap<String, String>>(); 

Это asyncTask класс

class loadStoreItems extends AsyncTask<String, Void, ArrayList<HashMap<String, String>>> { 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     rssItemList.clear(); 
    } 

    @Override 
    protected ArrayList<HashMap<String, String>> doInBackground(
      String... args) { 
     // updating UI from Background Thread 
     FeedDBHandler rssDb = new FeedDBHandler(getApplicationContext()); 

     // listing all RSSItems from SQLite 
     List<RSSItem> rssList = rssDb.getAllItems(); 

     // loop through each RSSItem 
     for (int i = 0; i < rssList.size(); i++) { 

      RSSItem s = rssList.get(i); 

      // creating new HashMap 
      HashMap<String, String> map = new HashMap<String, String>(); 

      // adding each child node to HashMap key => value 

      map.put(TAG_TITLE, s.getTitle()); 
      map.put(TAG_LINK, s.getLink()); 
      map.put(TAG_CATEGORY, s.getCategory()); 
      map.put(TAG_DESRIPTION, s.getDescription()); 
      map.put(TAG_PUB_DATE, s.getPubdate()); 
      // adding HashList to ArrayList 
      rssItemList.add(map); 

     } 
     return rssItemList; 
    } 

Это может быть полезно для вас.

Вы можете ознакомиться с этим кодом.

Answer 2

Добавить содержимое в ListView, а затем использовать onItemClickListener для каждого значения ListItem. Вы можете достичь своей цели, указав код ниже.

Используйте это для вашей глобальной переменной вместо массива строк

Global Class

class GlobalClass extends Application { 
    public static List<String> myVal = new ArrayList<String>() ; 
    } 

HomeActivity

OnItemClickListener

listView.setOnItemClickListener(new OnItemClickListener() { 

    @Override 
    public void onItemClick(AdapterView<?> parent, View view, int position, 
      long id) { 

     String clickedvalue =(String) parent.getItemAtPosition(position); 
     myVal.add(clickedvalue); 

     } 
    }); 
} 

Теперь все Clicked значения будут находиться в вашем ListArray.

, а затем вы можете отправить его через ..

intent.putParcelableArrayListExtra("addresses", addyExtras); 

Я надеюсь, что это помогает.