这是我第一次在这里(我发现网站非常有用).我是
Android的新手,我需要找出为什么我无法在列表视图中动态加载图像.
我有三个字符串数组:
private String lv_arr[]={"News","Events","Other"}; private String lv_arr_d[]={"Get the latest news","Latest events","Other description here"}; private String lv_arr_icons[]={"news","events","other"};
我的列表在每个列表项中向右显示一个图标,右边是两行文字.
当我硬编码图像的名称(例如新闻)时,它可以正常工作.
ArrayList <HashMap <String,Object>> users = new ArrayList <HashMap <String,Object>> (); int l = lv_arr.length; for (int i = 0; i <l; i++) { HashMap <String,Object> user = new HashMap <String,Object> (); //get icons String uri = "drawable/"+lv_arr_icons[i]; user.put ( "icon",(Drawable)getResources().getDrawable( getResources().getIdentifier(uri,null,getPackageName()))); //the above works ok if i set R.drawable.news user.put ( "label",lv_arr[i].toString()); user.put ( "description",lv_arr_d[i].toString()); users.add (user); } String[] names = {"icon","label","description"}; int[] views = {R.id.icon,R.id.label,R.id.description}; SimpleAdapter saImageItems = new SimpleAdapter(this.getApplicationContext(),users,R.layout.optionslistitem,names,views); lv1.setAdapter(saImageItems); //lv1 is my ListView
解决方法
如果你这样做:
user.put ( "icon",getResources().getIdentifier(uri,"drawable",getPackageName()));