Question

我正在开发一个Android应用程序，其中用户从服务器获取json数据并将其放在列表视图中。

在列表视图中，每个Item都有一些textViews和EditText。现在我希望用户在EditTexts中输入一个数字并将值发送回服务器。

Order.Java：

public class Order extends ListActivity {
    UserFunctions userFunctions;
    SessionManager session;
    TextView text;
    private static final String URL = "http://mydomain.in/webservice/json_sas.php";

    private static final String TAG_SUCCESS = "success";
    private static final String TAG_ITEM = "Item";
    private static final String TAG_POSTS = "posts";
    private static final String TAG_SALE = "sale";

    private JSONArray mComments = null;
    private ArrayList<HashMap<String, String>> mCommentList;
    private JSONArray sasTotal = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_order);
        new LoadOrderForm().execute();
    }

    /**
     * Retrieves recent products data from the server.
     */
    public void updateJSONdata() {
        session = new SessionManager(getApplicationContext());

        HashMap<String, String> user = session.getUserDetails();
        String cc = user.get(SessionManager.KEY_CC);
        mCommentList = new ArrayList<HashMap<String, String>>();

        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("cc", cc));

        Log.d("request!", "starting");
        JSONParser jParser = new JSONParser();
        JSONObject json = jParser.makeHttpRequest(URL, "POST", params);

        try {
            mComments = json.getJSONArray(TAG_POSTS);
            for (int i = 0; i < mComments.length(); i++) {
                JSONObject c = mComments.getJSONObject(i);

                // gets the content of each tag
                String item = c.getString(TAG_ITEM);
                String pack = c.getString(TAG_PACK);
                String bal = c.getString(TAG_BAL);
                String sale = c.getString(TAG_SALE);
                String LM1 = c.getString(TAG_LM1);
                String LM2 = c.getString(TAG_LM2);

                // creating new HashMap
                HashMap<String, String> map = new HashMap<String, String>();

                map.put(TAG_ITEM, item);
                map.put(TAG_PACK, pack);
                map.put(TAG_BAL, bal);
                map.put(TAG_SALE, sale);
                map.put(TAG_LM1, LM1);
                map.put(TAG_LM2, LM2);
                // adding HashList to ArrayList
                mCommentList.add(map);
            }
            sasTotal = json.getJSONArray(TAG_SASARRAY);

            // looping through all posts according to the json object returned
            for (int i = 0; i < sasTotal.length(); i++) {
                JSONObject d = sasTotal.getJSONObject(i);
                // gets the content of each tag
                String sval = d.getString(TAG_SVAL);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    /**
     * Inserts the parsed data into the listview.
     */
    private void updateList() {
        ListAdapter adapter = new SimpleAdapter(this, mCommentList,
            R.layout.single_post_order, new String[] { TAG_ITEM,
            TAG_SALE,TAG_BAL }, new int[] { R.id.Item, R.id.sale, R.id.stk });

        setListAdapter(adapter);
        ListView lv = getListView();    
        lv.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            }
        }); 
    }

    public class LoadOrderForm extends AsyncTask<Void, Void, Boolean> {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }
        @Override
        protected Boolean doInBackground(Void... arg0) {
            updateJSONdata();
            return null;
        }
        @Override
        protected void onPostExecute(Boolean result) {
            super.onPostExecute(result);
            updateList();
        }
    }
}
}

ListActivity如下所示：

https://drive.google.com/file/d/0Bz-FxbI1t7ezMzVoUWo3NXBlWW8/edit?usp=sharing

现在我想学习：

如何检测用户是否在许多项目的EditTexts中输入了数字？
如何从texview中收集id或名称，并在Edittext中输入数量？
如何将它们作为ARRAY发布回服务器？

Answer 1

我实际上只需要为之前的项目执行此操作。希望我能给你一些有见识的答案。

1）您需要创建自己的适配器类并将其展开。

2）展开你的editview，同样查看列表中textview的id。我假设您还有一个具有此视图的按钮。

3）将服务器对象传递给init函数，并在单击按钮时引用它的方法。

public class MyAdapter extends SimpleAdapter{

...
    private final ServerClass server;
    private Button submit;

public MyAdapter(Context context,
        List<? extends HashMap<String, ?>> data, int resource, String[] from, int[] to, ServerClass server, Button submit) {
    super(context, data, resource, from, to);

            this.server = server;
            this.submit = submit;
            /*set up all of your init stuff here so you can figure out which view was changed when getview is called*/

}

public View getView(int position, View v, ViewGroup parent)
{
    final View mView = super.getView(position, v, parent);

        submit.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            for(int i = 0; i < parent.getChildCount(); i++){
                View row = parent.getChildAt(i);
                View textview= row.findViewById(/*textviewID*/);
                View editview= row.findViewById(/*editviewID*/);
                Log.i("CustomText!!!",textview.getText());
                Log.i("CustomText!!!",editview.getText());
                server.sendPOSTMethod(textview.getText(),editview.getText());
            }
        }
    });

    return mView;
}

从列表视图中获取（几个）EditText值并作为数组发布

1 个答案: