从List 填充ListView

基本上我有一个类成分的对象列表，如下所示：

class Ingredient { public int id; public String name; public Ingredient(String name) { this.name = name; } } 

所以列表中的每个对象都有一个名称。

现在使用ArrayAdapter我需要一个用名称填充的字符串列表。 有没有办法将ArrayAdapter与我的成分列表一起使用？ 这就是它现在的样子

 List ingredientsList= new ArrayList(); ingredientsList.add(new Ingredient("foo")); ingredientsList.add(new Ingredient("bar")); 

Answer 1

使用以下。 您可以使用for循环并填充您的ingredientsList 。 以下只是一个例子

 List ingredientsList= new ArrayList(); Ingredient i= new Ingredient("foo"); ingredientsList.add(i); Ingredient i1= new Ingredient("bar"); ingredientsList.add(i1); 

然后

  ListView lv = (ListView) findViewById(R.id.listview); // initialize listview lv.setAdpater(new CustomAdapterArrayAdapter(ActivityName.this,ingredientsList)); // set the custom adapter to listview 

您可以使用CustomAdapterArrayAdapter自定义布局

 public class CustomAarrayAdapter extends ArrayAdapter { List ingredientsList; public CustomArrayAdapter(Context context, List list) { super(context,0,list); ingredientList = list; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = mInflater.inflate(R.layout.row,parent,false); // inflate custom layout called row holder = new ViewHolder(); holder.tv =(TextView) convertView.findViewById(R.is.textView1); // initialize textview convertView.setTag(holder); } else { holder = (ViewHolder)convertView.getTag(); } Ingredient in = (Ingredient)ingredientsList.get(position); holder.tv.setText(in.name); // set the name to the text; return convertView; } static class ViewHolder { TextView tv; } } 

http://developer.android.com/training/improving-layouts/smooth-scrolling.html

ViewHolder用于平滑滚动和性能

row.xml

编辑：

不使用自定义适配器

 class Ingredient { public int id; public String name; public Ingredient(String name) { this.name = name; } @Override public String toString() { // TODO Auto-generated method stub return this.name.toString(); } } 

然后

公共类MainActivity扩展Activity {

 List ingredientsList= new ArrayList(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); for(int i=0;i<10;i++) { ingredientsList.add(new Ingredient("foo"+i)); } ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,ingredientsList); ListView lv= (ListView) findViewById(R.id.listView1); lv.setAdapter(adapter); } } 

然后

activity_main.xml中

快照

Answer 2

扩展数组适配器类：

 public class MyAdapter extends ArrayAdapter { Activity activity; public MyAdapter(Activity context, int resource, List objects) { super(context, resource, objects); this.activity = context; } public View getView(int position, View convertView, ViewGroup parent) { Ingredient currentIngredient = getItem(position); //Do Something .... }