How to Check Internet Connection in Android

How to Check Internet Connection in Android

Hi!

  Some of new android programmers facing the one of the problem to check the internet connectivity.

You can Download my jar at Here and can add into your project

or

 I have write the blow  class for to check the internet connection.

package ra_jEmail_Mob_Validation;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class RCheckInternet {

boolean is_Rconnected=true;
private int TYPE_WIFI=1,TYPE_MOBILE = 2,TYPE_NOT_CONNECTED = 0;

private int isInternetAvailabl(Context context) {
ConnectivityManager cm=(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo nf=cm.getActiveNetworkInfo();
if (null != nf) {
            if(nf.getType() == ConnectivityManager.TYPE_WIFI)
                return TYPE_WIFI;
           
            if(nf.getType() == ConnectivityManager.TYPE_MOBILE)
                return TYPE_MOBILE;
        }
        return TYPE_NOT_CONNECTED;
}

public boolean is_Rconnected(Context context) {
int conn = isInternetAvailabl(context);
if (conn == TYPE_NOT_CONNECTED)
{
is_Rconnected=false;
        }
return is_Rconnected;
}
}

it is enough to pass the application context & you will receive the status of the current connection

public class Main extends Activity implements OnClickListener{

Button lin,regs;

Login_Emenu_Manager lgMan;

EditText un,pw;

boolean log_chk = false;

String url_lin="http:my link to pass the variables";//?Email,Password

public ProgressDialog pDialog;

// create reference for the class

RCheckInternet r_nw;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

lgMan = new Login_Emenu_Manager(getApplicationContext());

// create an object for the class

r_nw=new RCheckInternet();

lin.setOnClickListener(this);

regs.setOnClickListener(this);

}

public void init()

{

lin=(Button) findViewById(R.id.bn_login);

regs=(Button) findViewById(R.id.bnreg);

un=(EditText) findViewById(R.id.r_email);

pw=(EditText) findViewById(R.id.r_pass);

}

@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;

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

switch(v.getId())

{

case R.id.bn_login:

if(!un.getText().toString().equals(""))

{

if(!pw.getText().toString().equals(""))

{

//pass the context of the current class to check the internet status

if(r_nw.is_Rconnected(getApplicationContext()))

{

new MainAsy().execute();

}

else

{

Toast.makeText(getApplicationContext(), "Not connected to Internet", Toast.LENGTH_SHORT).show();

}

}

else

{

pw.setError(Html.fromHtml("<font color='green'>Enter Valid Password</font>"));

}

}

else

{

un.setError(Html.fromHtml("<font color='green'>Enter Valid UserName</font>"));

}

break;

case R.id.bnreg:

Intent ii=new Intent(this,Register.class);

startActivity(ii);

break;

}

}

@Override

public void onBackPressed() {

// TODO Auto-generated method stub

finish();

super.onBackPressed();

}

class MainAsy extends AsyncTask<String, String, String> {

@Override

protected void onPreExecute() {

// TODO Auto-generated method stub

super.onPreExecute();

pDialog = new ProgressDialog(Main.this);

pDialog.setMessage("LOGIN..,");

pDialog.setIndeterminate(false);

pDialog.setCancelable(false);

pDialog.show();

}

@Override

protected String doInBackground(String... params) {

// TODO Auto-generated method stub

List<NameValuePair> sv_param = new ArrayList<NameValuePair>();

JSONParser sv_jparse = new JSONParser();

sv_param.add(new BasicNameValuePair("Email", un.getText().toString()));

Log.d("un.getText().toString()", un.getText().toString());

sv_param.add(new BasicNameValuePair("Password", pw.getText().toString()));

Log.d("pw.getText().toString()", pw.getText().toString());

String sv_json = sv_jparse.makeHttpRequest(url_lin, "GET", sv_param);

Log.d("sv_json", sv_json);

try {

JSONObject sv_jobj = new JSONObject(sv_json);

if (sv_jobj != null) {

String user_key=sv_jobj.getString("UserID");

log_chk=true;

lgMan.createSession(un.getText().toString(), pw.getText().toString(), user_key);

Intent i=new Intent(Main.this,HomeActivity.class);

startActivity(i);

}

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return null;

}

@Override

protected void onPostExecute(String result) {

// TODO Auto-generated method stub

super.onPostExecute(result);

pDialog.dismiss();

if(!log_chk)

{

AlertDialog.Builder ad= new AlertDialog.Builder(new ContextThemeWrapper(Main.this, R.style.popup_theme));

ad.setTitle("Login Failed");

ad.setMessage("Please Check Your Entry..,");

ad.setInverseBackgroundForced(false);

ad.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

un.setText("");

pw.setText("");

}

});

ad.show();

}

}

}

} 

Now you can easily check the internet status by my above class..,

Thank You!

Please Leave Your Comment..,

Have A Happy Day..,