Android Detect Internet Connection Status

When we use internet connection for our operation,first we need to check internet connection availability.For example : Invoke web services,network operation,etc.

You can download source code here.

This is code for GenerateCodeActivity. It will invoke SOAP response from our server.

package com.etr.securitycode;

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class GenerateCodeActivity extends Activity {
private String METHOD_NAME = "CodeGenerate";
private String NAMESPACE = "http://tempuri.org/";
private String SOAP_ACTION = "http://tempuri.org/IService1/CodeGenerate";
private static final String URL = "http://easprojects.sifytest.net/MyServices/Service1.svc?wsdl";
Object result;
EditText username, password, code;
Button generate;
NetWorkStatus status;

@Override
protected void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_generate_code);
username = (EditText) findViewById(R.id.editText1);
password = (EditText) findViewById(R.id.editText2);
code = (EditText) findViewById(R.id.editText3);
generate = (Button) findViewById(R.id.button1);
status = new NetWorkStatus(this);
generate.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
if (status.isConnecting()) {
showAlertDialog(GenerateCodeActivity.this,
"Internet connection",
"You have internet connection");
new Invoke().execute();
} else {
showAlertDialog(GenerateCodeActivity.this,
"No Internet connection",
"You don't have internet connection");
}
}
});

} catch (Exception e) {
Log.v("Exception", Log.getStackTraceString(e));
}
}

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

public class Invoke extends AsyncTask<Void, Void, Void> {

ProgressDialog dialog;

protected void onPreExecute() {
dialog = new ProgressDialog(GenerateCodeActivity.this);
dialog.setMessage("Please wait...");
dialog.setCancelable(false);
dialog.show();
}

protected Void doInBackground(Void... arg0) {

try {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("userName", username.getText().toString());
request.addProperty("password", password.getText().toString());
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION, envelope);
result = envelope.getResponse();
} catch (Exception e1) {
Log.v("JSONCall Exception", Log.getStackTraceString(e1));
}
return null;
}

protected void onPostExecute(Void name) {
username.setText("");
password.setText("");
code.setText(result.toString());
dialog.dismiss();
}

}

public void showAlertDialog(Context context, String title, String msg) {
AlertDialog.Builder builder = new AlertDialog.Builder(
GenerateCodeActivity.this);
builder.setTitle(title).setMessage(msg).setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}

}

This is code for NetWorkStatus. It will check network availability using ConnectivityManager.

package com.etr.securitycode;

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

public class NetWorkStatus {
private Context _context;

public NetWorkStatus(Context context) {
this._context = context;
}

public boolean isConnecting() {
ConnectivityManager connectivity = (ConnectivityManager) _context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
}

We need permission for checking internet availability.

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Output :