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Check internet connectivity in Android

Write a class which check internet connectivity in android mobile

ConncetionDetector.class

public class ConnectionDetector {
private Context _context;
public ConnectionDetector(Context context){
this._context = context;
}

public boolean isConnectingToInternet(){
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;
}
}


Activity:

public class MainActivity extends ActionBarActivity {

ConnectionDetector cd;
public static boolean isInternetPresent = false;
TextView info;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cd=new ConnectionDetector(getBaseContext());
isInternetPresent = cd.isConnectingToInternet();
Button click=(Button)findViewById(R.id.button1);
click.setOnClickListener(new  OnClickListener() {
@Override
public void onClick(View v) {
info=(TextView)findViewById(R.id.textView1);
if(isInternetPresent){
info.setText("Connected to internet");
}else{
info.setText("No internet connection");
}
}
});
}
}

Xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.sachinsandbhor.internetconnectiondemo.MainActivity"
    tools:ignore="MergeRootFrame" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"/>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView1"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="80dp"
        android:text="Check Internet Connection" />

</RelativeLayout>

Add these two lines in AndroidManifest
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

ScreenShots:




 Here is the sample Code

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