带有ListView [Android]的AlertDialog中的图像出现问题。

AlertDialog.Builder builder = new AlertDialog.Builder(this);

ListView modeList = new ListView(this);
stringArray = new String[1];

**stringArray[0] = new String(getString( R.string.facebook),getImg( R.drawable.icon ));**

ArrayAdapter<String> modeAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, stringArray);
modeList.setAdapter(modeAdapter);

builder.setTitle(\"Share\");
builder.setIcon(R.drawable.icon);
builder.setItems(stringArray, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
                    //Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
                }
            });

AlertDialog alert = builder.create();
alert.show();

private Drawable getImg( int res )
        {
            Drawable img = getResources().getDrawable( res );
            img.setBounds( 0, 0, 48, 48 );
            return img;
        }