Comment puis-je mettre drawable à un ListView dans Android

Question

Je suis en train d'écrire une application pour Android 1.5.  Je veux utiliser un listview complexe pour afficher mes données.  Je veux montrer un ImageView d'un objet drawable dans mon élément de liste.

Je l'ai appris d'une démonstration:

------> listData.put("Img", listData.put("Img", R.drawable.XXX));
listData.put("Time", "100");
listItems.add(listData);

Il peut afficher correctement, cependant, je veux changer Img lors de l'exécution, l'image peut-être générée lors de l'exécution, donc je modifier le code comme suit, mais il tombe. Quelqu'un peut-il m'aider ? merci beaucoup!

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.item_list);
    itemListView = (ListView) findViewById(R.id.listview);
    ArrayList<HashMap<String, Object>> listItems = new ArrayList<HashMap<String, Object>>();
    for(int i = 0;i <XXX.size(); ++i) {
        HashMap<String, Object> listData = new HashMap<String, Object>();
--------->/*1)*/  listData.put("Img", new Drawable(XXX));
        /*2)*/  listData.put("Time", "100");
        /*3)*/  listItems.add(listData);
    }
    SimpleAdapter listItemAdapter = new SimpleAdapter(this, listItems, R.layout.listitem, new String[] { "Img", "Time"}, new int[] { R.id.listitem_img, R.id.listitem_time });
    itemListView.setAdapter(listItemAdapter);
}

listitem.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    android:layout_width="fill_parent" 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content" 
    android:paddingBottom="4dip"
    android:paddingLeft="12dip" 
    android:paddingRight="12dip">

    <ImageView 
        android:id="@+id/listitem_img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="12dip"/>

    <TextView
        android:id="@+id/listitem_time" 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:textSize="20dip" />

</LinearLayout>

Answer 1

Essayez celui-ci, il m'a aidé.

public class AndroidList extends ListActivity {

public class MyCustomAdapter extends ArrayAdapter<String> {

 public MyCustomAdapter(Context context, int textViewResourceId,
   String[] objects) {
  super(context, textViewResourceId, objects);
  // TODO Auto-generated constructor stub
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  // TODO Auto-generated method stub
  //return super.getView(position, convertView, parent);

  View row = convertView;

  if(row==null){
   LayoutInflater inflater=getLayoutInflater();
   row=inflater.inflate(R.layout.row, parent, false);
  }

  TextView label=(TextView)row.findViewById(R.id.weekofday);
  label.setText(month[position]);
  ImageView icon=(ImageView)row.findViewById(R.id.icon);

  if (month[position]=="December"){
   icon.setImageResource(R.drawable.icon);
  }
  else{
   icon.setImageResource(R.drawable.icongray);
  }

  return row;
 }
}

String[] month = {
     "January", "February", "March", "April",
     "May", "June", "July", "August",
     "September", "October", "November", "December"
   };

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      //setContentView(R.layout.main);
      /*setListAdapter(new ArrayAdapter<String>(this,
        R.layout.row, R.id.weekofday, DayOfWeek));*/
      setListAdapter(new MyCustomAdapter(AndroidList.this, R.layout.row, month));
  }

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
 // TODO Auto-generated method stub
 //super.onListItemClick(l, v, position, id);
 String selection = l.getItemAtPosition(position).toString();
 Toast.makeText(this, selection, Toast.LENGTH_LONG).show();
}

}

trouvé ici: http: //android-er.blogspot.com/2010/06/using-convertview-in-getview-to-make.html