Insert Record JSON Android in localhost environment

Synopsis

• This tutorial is the continuation of Login JSON Android using Login Activity
• STEP 1: Preparing the online database facilities in localhost.
• STEP 2: Preparing the PHP script to insert a new record.
• STEP 3: Coding of The Android client

 

STEP 1: Preparing the online database facilities in localhost.

Our Localhost environment is on Xampp as usual.

Importing the database to the online database. Download the full code below and you will find the SQL-dump file. Import the file and it will create a database named training.

STEP 2: PHP script

Preparing the PHP script to insert a new record. We have lots of files, insertrecord.php are the one in use for this tutorial.

<?php
// include connect class
require_once __DIR__ . '/connect.php';

// connecting to db
$db = new DB_CONNECT();

//capture all values from client
$id=$_POST['id'];
$trainingname=$_POST['trainingname'];
$website=$_POST['website'];
$contact=$_POST['contact'];
$trainingdesc=$_POST['trainingdesc'];

//sql query
$q = mysql_query("INSERT INTO a_training VALUES ('$id','$trainingname', '$website','$contact','$trainingdesc')");

//echo (mysql_error());

if ($q==true) {
    // match found
	//send success to client if save went thru
		echo "success";

	}//end match found

	else{//no match found
		//send status fail
		echo "fail";

}

?>

 

STEP 3: Coding of The Android client

As in the screenshot, the layout is in the layout xml file. This activity is created from the Basic Activity. Kindly download the project folder for the complete code.

 

HttpHandler.java is the helper class to manage the online connection. Copy and paste to the package folder.

The InsertRecord.java is the file to handle the GUI and the AsyncTask (multi-threading) code. We are just providing the segment code where the multi-threading of storing the new record in the online database, kindly download the project folder for the complete code.

You may call this class from onClick button by

    public void onClick(View v){
        if (v.getId()==R.id.fab) {
            id = txtid.getText().toString();
            trainingname = txttrainingname.getText().toString();
            contact = txtcontact.getText().toString();
            website = txtwebsite.getText().toString();
            trainingdesc = txttrainingdesc.getText().toString();

            //call the AsyncTask
            new SaveNewRecord().execute();
        }//end btnsave
    }//onClick

 

The complete SaveNewRecord asynctask

//****************************** Save record process ASYNCTASK, starts here
    public class SaveNewRecord extends AsyncTask<String, Void, String> {
        //the progressdialog
        ProgressDialog progress = new ProgressDialog(InsertRecord.this);
        protected void onPreExecute(){
            //set message of the dialog
            progress.setMessage("Saving record to online database...");
            //show dialog
            progress.show();
            super.onPreExecute();
        }

        protected String doInBackground(String... arg0) {

            try {
                // here is your URL path, change the IP number to
                // point to your own server
                URL url = new URL("http://192.168.43.252/training/insertrecord.php");

                JSONObject postDataParams = new JSONObject();
                //add name pair values to the connection
                postDataParams.put("id", id);
                postDataParams.put("trainingname", trainingname);
                postDataParams.put("contact", contact);
                postDataParams.put("website", website);
                postDataParams.put("trainingdesc", trainingdesc);

                Log.e("params",postDataParams.toString());
                Log.e("URL",url.toString());

                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setReadTimeout(15000 /* milliseconds */);
                conn.setConnectTimeout(15000 /* milliseconds */);
                conn.setRequestMethod("POST");//method=post
                conn.setDoInput(true);
                conn.setDoOutput(true);
                conn.connect();//execute the connection

                OutputStream os = conn.getOutputStream();
                BufferedWriter writer = new BufferedWriter(
                        new OutputStreamWriter(os, "UTF-8"));
                writer.write(getPostDataString(postDataParams));

                writer.flush();
                writer.close();
                os.close();

                int responseCode=conn.getResponseCode();
                Log.e("responseCode", "responseCode "+responseCode);
                if (responseCode == HttpsURLConnection.HTTP_OK) {
                    //code 200 connection OK
                    //code 500 server not responding
                    //code 404 file not found
                    //this part is to capture the server response
                    BufferedReader in=new BufferedReader(new
                            InputStreamReader(
                            conn.getInputStream()));
                    //Log.e("response",conn.getInputStream().toString());

                    StringBuffer sb = new StringBuffer("");
                    String line="";

                    do{
                        sb.append(line);
                        Log.e("MSG sb",sb.toString());
                    }while ((line = in.readLine()) != null) ;

                    in.close();
                    Log.e("response",conn.getInputStream().toString());
                    Log.e("textmessage",sb.toString());
                    return sb.toString();//server response message

                }
                else {

                    return new String("false : "+responseCode);
                }
            }
            catch(Exception e){
                //error on connection
                return new String("Exception: " + e.getMessage());
            }
        }

        @Override
        protected void onPostExecute(String result) {
            //Toast.makeText(getApplicationContext(), result,
            //Toast.LENGTH_LONG).show();
            //return result;
            //call method to handle after verification
            if(progress != null && progress.isShowing()){
                progress.dismiss();
            }
            saveVerification(result);//call saveVerification to display dialog
        }
    }//end

    public String getPostDataString(JSONObject params) throws Exception {

        StringBuilder result = new StringBuilder();
        boolean first = true;

        Iterator<String> itr = params.keys();

        while(itr.hasNext()){
            String key= itr.next();
            Object value = params.get(key);

            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(key, "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(value.toString(), "UTF-8"));

        }
        //Log.i("result",result.toString());
        return result.toString();
    }//end sendPostData

    public void saveVerification(String svrmsg){
        String savemsg="";
        //if new record successfully saved
        Toast.makeText(this, "svrmsg:"+svrmsg, Toast.LENGTH_LONG).show();
        if (svrmsg.equals("success")){

            savemsg="New record succesfully saved.";

        }
        else {//save attempt failed
            savemsg="Fail to save new record!";
        }

        //**********common dialog box
        AlertDialog.Builder builder1 = new AlertDialog.Builder(this);
        builder1.setTitle("Saving Record");
        builder1.setMessage(savemsg);
        builder1.setCancelable(false);
        builder1.setPositiveButton("ok", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        }).create().show();
    }
    //****************************** Save record ASYNCTASK, ends here

 

 

DOWNLOAD THE COMPLETE SOURCE CODE HERE
https://drive.google.com/file/d/0B34ZxOOoeSDdakYwbHMxclZIdjQ/view?usp=sharing

Need face-to-face lesson?, we also provide Android Studio training, 0129034614
http://bit.ly/androidjsk

Disclaimer: Intermediate to advanced level. This tutorial works on Android Studio 2.3. Should you have any difficulties, leave your comment in the comment section.
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