Showing posts with label JSON. Show all posts
Showing posts with label JSON. Show all posts

  2:15 PM            No comments
1. For this example I am using php server side code to gather the data from the data base and return it as a Json format. For this we can use the buid in code for php i.e.
json_encode($data);

for eg: (using Codeigniter model)

                $check_sql = "Select * from user where about_status = 1"; //status is flag for the active user
$check = $ci->db->query($check_sql);
$row = $check->result();

echo json_encode($row);

which gives output as:

{
"records": [
  {
    "Name" : "Yubraj Pokharel",
    "City" : "Kathmandu",
    "Country" : "NP"
  },
  {
    "Name" : "Chitra Shrestha",
    "City" : "Pokhara",
    "Country" : "NP"
  },
  {
    "Name" : "Prayag Upd",
    "City" : "California",
    "Country" : "US"
  },
  {
    "Name" : "Sudhan Pokharel",
    "City" : "Nepalgunj",
    "Country" : "NP"
  },
  {
    "Name" : "Mr Tom Cruise",
    "City" : "California",
    "Country" : "US"
  }
]
}

2. calling it from the angular page:

<html>
<head>
<title>Json Data</title>
        call angular js here
</head>
<body>
<div class="container">
<div class="row">
<div class="col-lg-12" ng-app="myApp" ng-controller="customersCtrl"> 
<table class="table">
<tr>
<th>Name</th>
<th>country</th>
</tr>
<tr  ng-repeat="x in names">
     <td>{{ x.Name }} </td>
     <td>{{ x.Country }}</td>
   </tr>
</table>
</div>
</div>
</div>

<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("http://localhost/angular/news.php")
    .success(function(response) {$scope.names = response.records;});
});
</script>
</body>
</html>

3. Here it is done enjoy happy coding :)

Json parse from webserver in android or android studio

  11:10 PM            No comments
First you have to aware about this, reads a JSON (RFC 4627) encoded value as a stream of tokens. This stream includes both literal values (strings, numbers, booleans, and nulls) as well as the begin and end delimiters of objects and arrays. The tokens are traversed in depth-first order, the same order that they appear in the JSON document. Within JSON objects, name/value pairs are represented by a single token.

Now , How to parse json getting from webserver.

DefaultHttpClient   httpclient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httppost = new HttpPost("http://192.168.1.100/response.php");
httppost.setHeader("Content-type", "application/json");

 InputStream inputStream = null;
String result = null;
try {
    HttpResponse response = httpclient.execute(httppost);           
    HttpEntity entity = response.getEntity();

     inputStream = entity.getContent();
    // json is UTF-8 by default
    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
    StringBuilder sb = new StringBuilder();

     String line = null;
    while ((line = reader.readLine()) != null)
    {
        sb.append(line + "\n");
    }
    result = sb.toString();
} catch (Exception e) { 
    e.printStack();
}
finally {
    try{
if(inputStream != null)
inputStream.close();
}catch(Exception e){
e.printStack();
}
}

Now you have to create JsonObject


Create a JSONObject like this:

JSONObject jObject = new JSONObject(result);

and parse your requirement.


Happy Coding !!!

Load or get json from assets and parse in android studio

  2:45 PM            1 comment
Basically, when developing app there is data getting from web server, however , here json getting from assets, which is sometimes helpful when static data used in application.

First you have create Assets folder in main.
Right click on app, then select New and go to Folder and click finally you can see assets folder and click, like this



then put json file in assets folder in your app.
Now, in MainActivity,

public class MainActivity extends AppCompatActivity {

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View view) {
//                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)//                        .setAction("Action", null).show();                String jsonString=loadJSONFromAsset();
                Toast.makeText(getApplicationContext(),""+jsonString,Toast.LENGTH_SHORT).show();

            }
        });
    }

    @Override    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    public String loadJSONFromAsset() {
        String json = null;
        try {

            InputStream is = getAssets().open("emp.json");

            int size = is.available();

            byte[] buffer = new byte[size];

            is.read(buffer);

            is.close();

            json = new String(buffer, "UTF-8");

        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }
        return json;

    }

    @Override    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();

        //noinspection SimplifiableIfStatement        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }


and Click FloatAction button you will see json in String.









After you got json as a string, then you have parse as your required.

first you have to convert string in jsonobject.



JSONObject  jsonObject = new JSONObject(jsonString);



In last, you have to parse jsonOject as your preset tag in jsonString, here you have to remember that it will be necessary exactly same inside the "".



JSONObject emp_obj = jsonObject .getJSONObject("employees");



Happy Coding !!!

















        

      












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