Android : Error with loadUrl method

I'm building an app that shows two listviews. From the second one, by clicking on an item you get a webView of the file. The listviews work correct but I'm having a problem with the webView.

Here is my code:

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


public class WebView extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);

        Intent launchingIntent = getIntent();
        String content = launchingIntent.getData().toString();

        WebView viewer = **(WebView) findViewById(R.id.webView2);**
        viewer.**loadUrl**(content);

    }

Here is the .xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.estudiable.estudiable.WebView">

<WebView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/webView2"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />
</RelativeLayout>

Here is my question:

Why the bold sentences are underlined in red in my code?

While trying to compile it says this:

Error:(20, 53) error: cannot find symbol variable estudiableWebView
Error:(21, 15) error: cannot find symbol method loadUrl(String)

Thank you!