Question

我的json对国家的回复是：{"search values":[{"id":"1","name":"India"},{"id":"2","name":"srilanka"}],"success":1}
国家/地区添加到精简版。
我的要求当我选择国家/地区发布请求国家/地区“id”（动态）和表名称（静态）时。

然后我得到状态列表，这是({"searchvalues":[{"id":"1","name":"Tamilnadu"},{"id":"1","name":"Kerala"}],"success":1}).

我的代码是：

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.registration);


    //spinners
    country=(Spinner)findViewById(R.id.country);
    state=(Spinner)findViewById(R.id.state);
    dist=(Spinner)findViewById(R.id.dist);
    mandal=(Spinner)findViewById(R.id.mandal);

    //edit text
    uname=(EditText)findViewById(R.id.name);
    mobileno=(EditText)findViewById(R.id.mobileno);
    companyname=(EditText)findViewById(R.id.cname);
    village=(EditText)findViewById(R.id.village);
    landmark=(EditText)findViewById(R.id.landmark);
    pincode=(EditText)findViewById(R.id.pincode);
    pwd=(EditText)findViewById(R.id.pwd);
    cpwd=(EditText)findViewById(R.id.cpwd);
    dstatus=(EditText)findViewById(R.id.delivery);

    //Button
    submit=(Button)findViewById(R.id.submit);

    //adapter for drop down
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item);

    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    queue=Volley.newRequestQueue(this);

    submit.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            StringRequest sr = new StringRequest(Request.Method.POST, REG_URL, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {

                }
            }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError e) {
                    // TODO Auto-generated method stub
                    e.printStackTrace();
                }
            }){

            };
            queue.add(sr);

        }

    });

    //Getting Country spinnervalues
    StringRequest stringRequest = new StringRequest(com.android.volley.Request.Method.POST, D_URL,
            new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {
                    Log.d("response","response => "+response);
                    try {
                        JSONObject jsnobject = new JSONObject(response);
                    JSONArray  jsonArray = jsnobject.getJSONArray("searchvalues");
                    Log.d("jsonArray","jsonArray => "+jsonArray);
                     for (int i = 0; i < jsonArray.length(); i++) {
                         adapter.add(jsonArray.getJSONObject(i).getString("name"));
                     }

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                }

},  new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
         Log.d("ERROR","error => "+error.toString());
    }
}){
         @Override
            protected Map<String, String> getParams() 
            {  
             Map<String, String> params = new HashMap<String, String>();
                params.put("table","country");
                System.out.println("params-------------->"+ params);
                return params;
            }

    };
    queue.add(stringRequest);

    country.setAdapter(adapter);
  country.setOnItemSelectedListener(new OnItemSelectedListener() {

    @Override
    public void onItemSelected(AdapterView<?> parent, View view,
            int position, long id) {

        StringRequest sr = new StringRequest(Request.Method.POST, REG_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                // TODO Auto-generated method stub

            }
        }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError e) {
                // TODO Auto-generated method stub
                e.printStackTrace();
            }
        }){

            @Override
            protected Map<String, String> getParams() 
            {  
             Map<String, String> params = new HashMap<String, String>();
                params.put("table","state");
             //   params.put("id",position);
                System.out.println("params-------------->"+ params);
                return params;
            }

        };
        queue.add(sr);

    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {


    }
});
}
}

Answer 1

When you are selecting a country on its item select method write volley request    

country.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView<?> parent, View view,
        int position, long id) {

    StringRequest sr = new StringRequest(Request.Method.POST, REG_URL, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            // TODO Auto-generated method stub

          /**get your states from response and save it in array and pass this array to arrayadapter**/
        }
         //Now setadapter with spinner
    }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError e) {
            // TODO Auto-generated method stub
            e.printStackTrace();
        }
    })



    };
    queue.add(sr);

}

@Override
public void onNothingSelected(AdapterView<?> parent) {


}
});

我如何添加json响应下拉和当我选择国家显示状态

1 个答案: