有多個字符串的方法

-1

我知道這是不正確的，因爲它不起作用，但我不知道爲什麼這不起作用。有多個字符串的方法

我有多個spinners通過查詢從數據庫中填充。

vTypeSpinner.setOnItemSelectedListener(new OnItemSelectedListener(){ 

      public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int 
       pos, long id) { 
       if(pos!=0){ 

        Cursor vTypeChose = (Cursor)(vTypeSpinner.getSelectedItem()); 
        if (vTypeChose != null) { 
         String typePicked = vTypeChose.getString(
         vTypeChose.getColumnIndex(DataBaseHelper.POWERSPORTS_TYPE)); 
         vMake = (Cursor) DataBaseHelper.getPowersportsMake(typePicked); 
         scaMake.changeCursor(vMake); 
         Log.e("SpinnerTest", "Type Selected: " + vType.getString(vType.getColumnIndex(DataBaseHelper.POWERSPORTS_TYPE))); 


        } 
       } 
      } 

    vMakeSpinner.setOnItemSelectedListener(new OnItemSelectedListener(){ 

     public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int 
       pos, long id) { 
       if(pos!=0){ 

       Cursor vMakeChose = (Cursor)(vMakeSpinner.getSelectedItem()); 
       if (vMakeChose != null) { 
        makePicked = vMakeChose.getString(
        vMakeChose.getColumnIndex(DataBaseHelper.POWERSPORTS_MAKE)); 
        vYear = (Cursor) DataBaseHelper.getPowersportsYear(typePicked, makePicked); 
        scaYear.changeCursor(vYear); 
        Log.e("SpinnerTest", "Make Selected: " + vMake.getString(vMake.getColumnIndex(DataBaseHelper.POWERSPORTS_MAKE))); 


       } 
      } 
     }

一旦vMakeSpinner項目被選中，它會啓動vYearSpinner代碼

這是我今年微調查詢

public static Cursor getPowersportsYear(String typePicked, String makePicked){ 
return myDataBase.query(POWERSPORTS_TABLE, 
     new String [] {POWERSPORTS_ID, POWERSPORTS_YEARS}, 
     POWERSPORTS_TYPE+"='"+typePicked+"'" +" AND " + POWERSPORTS_MAKE+"='"+makePicked+"'", 
     null, 
     POWERSPORTS_YEARS, 
     null, 
     null); 
}

如果我只有DataBaseHelper方法中的一個字符串值，它工作正常，但只有在有爭論的地方。

更新了一些代碼：

public class PowersportsEquivalent extends Activity { 

DataBaseHelper myDbHelper; 
String typePicked; 
String makePicked; 
String yearPicked; 
SimpleCursorAdapter scaMake; 
SimpleCursorAdapter scaYear; 

Cursor vMake; 
Cursor vYear; 

@SuppressWarnings("deprecation") 
@Override 
protected void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_powersports_equivalent);

來源

2013-12-20 LukeG224

嘗試使用'POWERSPORTS_TYPE +「=」+ typePicked +「AND」+ POWERSPORTS_MAKE +「=」+ makePicked' –

應用程序與提供的代碼崩潰。給出一個LogCat錯誤：'12-20 11：11：55.195：E/AndroidRuntime（3180）：android.database.sqlite.SQLiteException：near「makeDemo2」：語法錯誤（代碼1）：編譯時：SELECT _id，powersports_years FROM powersports_data WHERE powersports_type = null AND powersports_make = makeDemo2 GROUP BY powersports_years' – LukeG224

'powersports_type = null'告訴你你的'typePicked'爲null，請檢查或在其中輸入手動值。 –

我注意到，我需要在我的光標再次獲取字符串值。所以我補充說：

typePicked = vType.getString(
       vType.getColumnIndex(DataBaseHelper.POWERSPORTS_TYPE));

在我的make光標，我的紡紗工作現在。

來源

2013-12-20 17:03:40 LukeG224

您在vTypeSpinner.setOnItemSelectedListener()這使得typePicked作爲局部變量使用

String typePicked = vTypeChose.getString(
         vTypeChose.getColumnIndex(DataBaseHelper.POWERSPORTS_TYPE));

。我認爲你沒有在哪裏初始化全球類型匹配。刪除字符串在上面的代碼，然後你的代碼應該正常工作。

來源

2013-12-20 17:57:51

有多個字符串的方法

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