我有一个屏幕，包括一个ListView，我现在用的显示设备列表的Andr​​oid应用程序。这些装置被保持在一个阵列。

I have an android app with a screen that comprises of a ListView, which I am using to display a list of devices. These devices are held in an array.

我想用一个ArrayAdapter显示的是在列表屏幕上的数组中开始。

I am trying to use the ArrayAdapter to display what is in the array on the screen in a list.

它的工作原理，当我第一次加载在 SetupActivity 类，但是，有设施，以在的AddDevice（）方式添加新设备，这意味着数组控股该设备被更新。

It works when I first load the SetupActivity class, however, there is the facility to add a new device in the addDevice() method, which means the array holding the devices is updated.

我使用的 notifyDataSetChanged（）这是应该更新列表，但它似乎并没有工作。

I am using notifyDataSetChanged() which is supposed to update the list but it doesn't seem to work.

public class SetupActivity extends Activity
{   
    private ArrayList<Device> deviceList;

    private ArrayAdapter<Device> arrayAdapter;

    private ListView listView;

    private DevicesAdapter devicesAdapter;

    private Context context;

    public void onCreate(Bundle savedInstanceState)  //Method run when the activity is created
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.setup);  //Set the layout

        context = getApplicationContext();  //Get the screen

        listView = (ListView)findViewById(R.id.listView);

        deviceList = new ArrayList<Device>();

        deviceList = populateDeviceList();  //Get all the devices into the list

        arrayAdapter = new ArrayAdapter<Device>(this, android.R.layout.simple_list_item_1, deviceList);

        listView.setAdapter(arrayAdapter);  
    }

    protected void addDevice()  //Add device Method (Simplified)
    {
        deviceList = createNewDeviceList();    //Add device to the list and returns an updated list

        arrayAdapter.notifyDataSetChanged();    //Update the list
}
}

任何人都可以看到我错了？

Can anyone see where I am going wrong?

推荐答案

对于ArrayAdapter， notifyDataSetChanged 只有当你使用添加，插入，删除和明确在适配器的功能。

arrayAdapter = new ArrayAdapter<Device>(this, android.R.layout.simple_list_item_1, deviceList);