Spinner圖像未顯示

Question

Folks。

我正試圖在android中使用自定義微調器來實現動態圖像。一切都很順利excite圖像不顯示與我的條件，它只顯示爲我的佈局中的默認圖像。任何人都可以指出我的錯誤是什麼？以下是我的代碼。

public class CustomSpinnerAdapter extends SimpleCursorAdapter { 

int layoutn; 
LayoutInflater mInflater; 

private final Cursor mCursor; 
private final int mLayout; 
private final LayoutInflater mLayoutInflater; 
private final Context mContext; 


int arr_images[] = { R.drawable.us, 
     R.drawable.uk, R.drawable.eur, 
     R.drawable.cn, R.drawable.ml, R.drawable.mr}; 

public CustomSpinnerAdapter (Context context, int layout, Cursor c, 
     String[] from, int[] to) { 

    super(context, R.layout.spinnertext, c, from, to); 

    this.mContext = context; 
    this.mCursor = c; 
    this.mLayout = layout; 
    this.mLayoutInflater = LayoutInflater.from(context); 

} 

private final class ViewHolder { 

    public TextView Title; 
    public ImageView flag; 

} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 



     final ViewHolder viewHolder; 

     if (convertView == null) { 


      convertView = mLayoutInflater.inflate(mLayout, parent, false); 

      viewHolder = new ViewHolder(); 



      viewHolder.Title = (TextView) convertView 
        .findViewById(R.id.currencytitle); 

      viewHolder.flag = (ImageView) convertView 
        .findViewById(R.id.imageView1); 

     } 

     else { 

      viewHolder = (ViewHolder) convertView.getTag(); 

     } 




     viewHolder.flag.setImageResource(arr_images[position]); 

    return convertView; 
} 

}

編輯：我的監聽器代碼和光標：

mDb = mHelper.getWritableDatabase(); 

字符串[] headers2 =新的String [] {MyDbHelper.COL_Currfirst，MyDbHelper.COL_Titleone};

 cursl = mDb.query(MyDbHelper.TABLE_NAME, headers2, MyDbHelper.COL_Currsecond + "=" + "?", 
      new String[] { "EUR" }, null, null, null); 






    adapters1 = new CustomSpinnerAdapter(this, R.layout.spinnertext, cursl, 
      headers2, new int[] { R.id.currencytitle , R.id.titlesub}); 



    fromc.setAdapter(adapters1); 
    toc.setAdapter(adapters1); 

Answer 1

row.xml在佈局文件夾

<?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="wrap_content" 
android:orientation="vertical" 
android:padding="3dip" 
> 
    <ImageView 
     android:id="@+id/image" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     /> 
    <TextView 
     android:layout_toRightOf="@+id/image" 
     android:padding="3dip" 
     android:layout_marginTop="2dip" 
     android:textStyle="bold" 
     android:textColor="#000000" 
     android:id="@+id/company" 
     android:text="CoderzHeaven" 
     android:layout_marginLeft="5dip" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 


</RelativeLayout> 

然後進行微調的一個.xml佈局並在活動中使用它來填充他們\

public class MyAdapter extends ArrayAdapter<String>{ 

    public MyAdapter(Context context, int textViewResourceId, String[] objects) { 
     super(context, textViewResourceId, objects); 
    } 

    @Override 
    public View getDropDownView(int position, View convertView,ViewGroup parent) { 
     return getCustomView(position, convertView, parent); 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     return getCustomView(position, convertView, parent); 
    } 


int arr_images[] = { R.drawable.us, 
    R.drawable.uk, R.drawable.eur, 
    R.drawable.cn, R.drawable.ml, R.drawable.mr}; 
public View getCustomView(int position, View convertView, ViewGroup parent) { 

    LayoutInflater inflater=getLayoutInflater(); 
    View row=inflater.inflate(R.layout.row, parent, false); 
    TextView label=(TextView)row.findViewById(R.id.company); 
    label.setText(strings[position]); 

    ImageView icon=(ImageView)row.findViewById(R.id.image); 
    icon.setImageResource(arr_images[position]); 

    return row; 
    } 
} 

在OnCreate中

（ ）像這樣使用它

Spinner spin; 
spin = (Spinner)findViewById(R.id.iconspin);//or whatever the id of your spinner is 
String[] strings = new String[] {MyDbHelper.COL_Currfirst ,MyDbHelper.COL_Titleone}; 
spin.setAdapter(new MyAdapter(MainActivity.this, R.layout.row, strings)); 
spin.setOnItemSelectedListener(this); 

，讓您的活動

implement OnItemSelectedListener 

，那麼你可以重寫此方法

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


    } 

應對微調的選擇