Question

我正在显示包含服务器描述和其他信息的图片。我正在使用凌空抽射。图像是类别明智的。当用户单击按钮时，它会将表名发布到服务器，并将服务器响应发布到图像。我正在使用POST JSONobject请求。

public void  getJsonResponsePost(View v){

JSONObject json = new JSONObject();
try {
    json.put("table","aad");
} catch (JSONException e) {
    e.printStackTrace();
}

JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, json,
        new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                Log.d(TAG, response.toString());



            }
        }, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Log.d(TAG, "Error: " + error.getMessage());
        serverResp.setText("String Response : "+ error.getMessage());
    }
});
jsonObjectRequest.setTag(REQ_TAG);

MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest);

}

PHP 文件

header('Content-Type: application/json');
include '../../script/database.php';
$response =array();
$data = json_decode(file_get_contents('php://input'), true);
$table = $data["table"];
$sql = "select * from $table WHERE (dp='1') LIMIT 1";
$query = mysqli_query($db, $sql);
$post_data_array = array();
while ($row = mysqli_fetch_array($query, MYSQLI_ASSOC)) {
    $img     = $row['image'];
    $id_image = $row['id'];
    $weight    = $row['weight'];
    $row_date  = $row['date'];

    $image_path   = $row['path'];
    $image = "http://192.168.43.138/djp/" . $image_path . $row['image'];
 $post_data_array[] = array(
              'image' => $image,
                 'weight' => $weight,
                 'date' => $date
            );
    }
  $post_data = json_encode(array('item' => $post_data_array), 
 JSON_FORCE_OBJECT);
echo $post_data;?>

JSONObject看起来像这样。

{"item":{"0":{"image":"http:\/\/192.168.43.238\/djp\/aad\/aad002.jpg","weight":"15","date":""}}}

现在我如何循环JSONobject？

Answer 1

我认为你需要这样的东西

 JSONArray heroArray = response.getJSONArray("item");

                        //now looping through all the elements of the json array 
                        for (int i = 0; i < heroArray.length(); i++) {
                            //getting the json object of the particular index inside the array
                         /*   JSONObject heroObject = heroArray.getJSONObject(i);
                            JSONObject geoObj=   heroObject.getJSONObject("geometry");
                            JSONObject locObj=   geoObj.getJSONObject("location");

                            LocationData loc=new LocationData( heroObject.getString("name"), heroObject.getString("vicinity"),locObj.getString("lat"),locObj.getString("lng"));
                            placesData.add(loc);*/

                        }

使用服务器的信息加载图像

1 个答案: