How to Open Any Website in Android Application in Android Studio

I just started a new appliction using android studio .. but i need to open a web page in my application i tried using web view but it doesnt worked out... when i open my app it crashes down

<WebView
    android:id="@+id/web_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

and i included in java class file

private  WebView wb;


@Override
protected void onCreate(Bundle savedInstanceState) {

 wb=(WebView)findViewById(R.id.web_view);
    WebSettings webSettings=wb.getSettings();
    webSettings.setJavaScriptEnabled(true);
    wb.loadUrl("http://ift.tt/Rvp0MX");

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_references);
}

In manifest xml file i included

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

but still my app crashes pllzz help me

android #android-studio