Reputation: 1902
How to send information from android app to server?
Hello everone I started studying webservices in android and I tried to save information from my android app to server
For this firstly I made a php file. I tried to insert code using that. I am succesful in inserting code using this php code file
<?php
$con=mysqli_connect("localhost","root","","abhi_DB");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// escape variables for security
$uname = mysqli_real_escape_string($con, $_POST['uname']);
$email = mysqli_real_escape_string($con, $_POST['email']);
$sql="INSERT INTO user_records (user_name, email)
VALUES ('$uname', '$email')";
if (!mysqli_query($con,$sql)) {
die('Error: ' . mysqli_error($con));
}
echo "1 record added";
mysqli_close($con);
?>
After this I tried to send information from my app to server by hitting url. The code I used is
public class MainActivity extends Activity {
TextView tv1;
HttpClient httpclient;
HttpPost httppost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) findViewById(R.id.tv1);
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://10.0.2.2/name.php");
new getresult().execute();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class getresult extends AsyncTask<Void, Void, Void>{
String result = null;
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("uname", "rocky"));
nameValuePairs.add(new BasicNameValuePair("email", "rockss"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Exception", e.toString());
}
return null;
}
@Override
protected void onPostExecute(Void result1) {
// TODO Auto-generated method stub
super.onPostExecute(result1);
tv1.setText("Data Inserted");
//Log.i("My Response :: ", result);
}
}
}
In the textview I get this message i.e Data Inserted but the problem is the value is not inserted in database.
So if you people kindly tell what mistake I am making. It will be somuch helpful for me. Thanks in advance
Upvotes: 0
Views: 429
Answers (3)
Reputation: 1902
A small project for webservices beginners. I am a webservice beginner, So I did something and I would like to share for beginners so that they may know how to use webservices
Firstly I made 2 php files
1st one with this I am able to save data on abhi_db database, user_records table, with 2 columns user_name and email
because I am not having server. As I am using localhost So I used localhost, username is root, password i set nothing so I leave it blank
<?php
$con=mysqli_connect("localhost","root","","abhi_DB");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// escape variables for security
$uname = mysqli_real_escape_string($con, $_POST['uname']);
$email = mysqli_real_escape_string($con, $_POST['email']);
$sql="INSERT INTO user_records (user_name, email)
VALUES ('$uname', '$email')";
if (!mysqli_query($con,$sql)) {
die('Error: ' . mysqli_error($con));
}
echo "1 record added";
mysqli_close($con);
?>
With this php code I am able to save the values in database by getting the values from my application Note: Dont forget to create database in phpmyadmin with the tablename that you use
2nd php file is
<?php
$con=mysqli_connect("localhost","root","","abhi_DB");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT * FROM user_records");
while($row = mysqli_fetch_array($result)) {
echo $row['user_name'] . " " . $row['email'];
echo "<br>";
}
mysqli_close($con);
?>
This second code is to get data saved in database
Now comes to android code:
Now from android we will hit hit the url
In the MainActivity class
public class MainActivity extends Activity {
TextView tv1;
HttpClient httpclient;
HttpPost httppost;
EditText edname, edemail;
Button Submit, GetData;
String geted1, geted2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) findViewById(R.id.tv1);
edname = (EditText) findViewById(R.id.editText1);
edemail = (EditText) findViewById(R.id.editText2);
Submit = (Button) findViewById(R.id.button1);
GetData = (Button) findViewById(R.id.button2);
httppost = new HttpPost("http://10.0.2.2/name.php");
Submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
geted1 = edname.getText().toString();
geted2 = edemail.getText().toString();
Log.i("Name", geted1);
Log.i("Email", geted2);
new getresult().execute();
}
});
GetData.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent i = new Intent(MainActivity.this, GetNameDemo.class);
startActivity(i);
}
});
}
public class getresult extends AsyncTask<Void, Void, Void> {
String result = null;
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
httpclient = new DefaultHttpClient(params);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
2);
nameValuePairs.add(new BasicNameValuePair("uname", geted1));
nameValuePairs.add(new BasicNameValuePair("email", geted2));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs,
"utf-8"));
result = httpclient.execute(httppost,
new BasicResponseHandler());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Exception", e.toString());
}
return null;
}
@Override
protected void onPostExecute(Void result1) {
// TODO Auto-generated method stub
super.onPostExecute(result1);
tv1.setText("" + result);
// Log.i("My Response :: ", result);
}
}
}
In the MainActivity class I used two edittext one for name and 2 nd for email and on click of submit button I sent values to server and on Getdata Button click I started Activity class GetNameDemo in which I get all the rows that are saved
public class GetNameDemo extends Activity {
TextView tv1,tv2;
HttpClient httpclient;
HttpPost httppost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.get);
tv1 = (TextView) findViewById(R.id.tv1);
tv2 = (TextView) findViewById(R.id.tv2);
httppost = new HttpPost("http://10.0.2.2/getname.php");
new getresult().execute();
}
public class getresult extends AsyncTask<Void, Void, Void>{
String name = "Names";
String email = " Emails";
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
try {
HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
httpclient = new DefaultHttpClient(params);
String resp = httpclient.execute(httppost, new BasicResponseHandler());
String[] nameEmailPairs = resp.split("<br>");
for(String pair : nameEmailPairs){
String[] par = pair.split(" ");
name = name + " \n " +par[0];
email = email + "\n " + par[1];
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Exception", e.toString());
}
return null;
}
@Override
protected void onPostExecute(Void result1) {
// TODO Auto-generated method stub
super.onPostExecute(result1);
tv1.setText("" +name );
tv2.setText( "" +email);
//Log.i("My Response :: ", result);
}
}
}
Note add the permission <uses-permission android:name="android.permission.INTERNET"/>
and activity <activity android:name="GetNameDemo"></activity>
If you want xml files also check this link and if you still face any problem ask here
Upvotes: 0
Reputation: 3497
You need to execute Your HTTP POST request:
try {
HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
HttpClient httpClient = new DefaultHttpClient(params);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("uname", "rocky"));
nameValuePairs.add(new BasicNameValuePair("email", "rockss"));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "utf-8"));
String resp = httpClient.execute(httpPost, new BasicResponseHandler());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Exception", e.toString());
}
To get data from server use below code:
try {
HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
HttpClient httpClient = new DefaultHttpClient(params);
// put the parameters if needed
String resp = httpClient.execute(httpPost, new BasicResponseHandler());
String[] nameEmailPairs = resp.split("<br>");
for(String pair : nameEmailPairs){
String[] par = pair.split(" ");
String name = par[0];
String email = par[1];
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Exception", e.toString());
}
Upvotes: 1
Reputation: 988
You can use a simple made framework for http request. http://loopj.com/android-async-http/ is very simple to use and offers callbacks after sending the request, as success and as well failure. This is all automated.
Here an example
AsyncHttpClient client = new AsyncHttpClient();
client.get("http://www.google.com", new AsyncHttpResponseHandler() {
@Override
public void onStart() {
// called before request is started
}
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] response) {
// called when response HTTP status is "200 OK"
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
// called when response HTTP status is "4XX" (eg. 401, 403, 404)
}
@Override
public void onRetry(int retryNo) {
// called when request is retried
}
});
Upvotes: 0
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