如何顯示圖像爲簡單列表視圖如果這個圖像是位圖

Question

如何顯示圖像爲簡單列表視圖如果這個圖像是位圖

該空隙中的位圖加載圖像

private Bitmap loadImageFromStorage(String ImageName) 
{ 
    ContextWrapper cw = new ContextWrapper(mActivity.getApplicationContext()); 
    // path to /data/data/yourapp/app_data/imageDir 
    File directory = cw.getDir("imageDir", Context.MODE_PRIVATE); 
    // Create imageDir 
    File path=new File(directory,ImageName+".jpg"); 

    try { 

     Bitmap b = BitmapFactory.decodeStream(new FileInputStream(path)); 
     // ImageView img=(ImageView)findViewById(R.id.imgPicker); 
     // img.setImageBitmap(b); 
     return b ; 
    } 
    catch (FileNotFoundException e) 
    { 
     e.printStackTrace(); 
    } 

    return null; 
} 

這是佈局從我的單個對象到列表

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 

android:layout_width="wrap_content" 
android:layout_height="60dp" 
android:padding="5dp" 
> 
<ImageView 
    android:layout_width="60dp" 
    android:layout_height="60dp" 

    android:background="@color/accent_material_dark" 
    style="@style/stile" 

    android:id="@+id/imageViewID" /> 

<LinearLayout 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_toEndOf="@+id/imageViewID"> 

    <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Nome Gruppo" 
      android:id="@+id/NomeGruppo" 
      android:layout_alignParentTop="false" 
      android:layout_alignParentStart="true" 
      android:layout_alignParentBottom="false" 
      android:layout_centerHorizontal="true" 
     android:layout_gravity="center_horizontal" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:textColor="#000000" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="#Gruppo" 
     android:id="@+id/IDgruppo" 

     android:layout_below="@+id/NomeGruppo" 

     android:layout_centerInParent="true" 
     android:layout_gravity="center_horizontal" 
     android:textColor="#6b6f6e" /> 
</LinearLayout> 

這是我的老甲基外徑爲負載列表視圖沒有圖像

private void visualizzaRisultati(){ 

    final List<Map<String, String>> lista = readDb(); 



    String[] from = {"NomeGruppo", "IDgruppo"}; //dai valori contenuti in queste chiavi 
    int[] to = {R.id.NomeGruppo, R.id.IDgruppo};//agli id delle view 
    SimpleAdapter adapter = new SimpleAdapter(
      mActivity.getApplicationContext(), 
      lista,//sorgente dati 
      R.layout.visualizza_ris_ric_gruppo, //layout contenente gli id di "to" 
      from, 
      to); 
    final ListView mylist = (ListView) getActivity().findViewById(R.id.listaGruppi); 

    mylist.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> arg0, View arg1, final int position, long arg3) { 

      Intent nuovaPagina = new Intent(mActivity, gruppo.class); 
      nuovaPagina.putExtra("nomeGruppo", lista.get(position).get("IDgruppo").toString()); 
      startActivity(nuovaPagina); 
     } 
    }); 
    mylist.setAdapter(adapter); 


} 

protected List<Map<String, String>> readDb(){ 
    SQLiteDatabase db; 
    db = getActivity().openOrCreateDatabase("utenteDB", Context.MODE_PRIVATE, null); 


    Cursor resultSet = db.rawQuery("Select * from gruppo",null); 


    List<Map<String, String>> lista = new ArrayList<Map<String, String>>(); 




    if (resultSet.moveToFirst()) { 
     do { 

      final String idgruppo = resultSet.getString(0); 
      final String nomeGruppo =resultSet.getString(1); 



      lista.add(new HashMap<String, String>() { 
       { 



        put("NomeGruppo", nomeGruppo); 
        put("IDgruppo", idgruppo); 


       } 
      }); 

     } while (resultSet.moveToNext()); 
    } 

    return(lista); 

} 

我怎樣才能圖像升級此方法用於負載到佈局列表視圖

Answer 1

下面是一個例子。 NB：這不是教程網站

private class MyCustomAdapter extends BaseAdapter { 


     @Override 
     public int getCount() { 
      return yourDataset.size(); 
     } 

     @Override 
     public String getItem(int position) { 
      return yourdata; 
     } 



     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
    //inflate your layout , bind data 

    } 
    }