App Crashes when button is clicked to load webview : I am very new to android programming and i am trying to develop a small app that basically has four buttons. One of the buttons is suppose to take the user to a login page on a website**(in the android app)** when clicked. I dont know what i am doing wrong but when ever the button (login) is clicked, the app crashes. Below are my codes 

MAIN ACTIVITY XML

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/back"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <Button
        android:id="@+id/login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="start"
        android:layout_margin="0dp"
        android:alpha="0.6"
        android:background="@drawable/my_button_bg"
        android:drawableLeft="@drawable/ic_lock_open_black_24dp"
        android:drawablePadding="5dp"
        android:onClick="login"
        android:padding="15dp"
        android:paddingLeft="50dp"
        android:paddingRight="20dp"
        android:text="@string/text_login"
        android:textAlignment="textStart"
        android:textAllCaps="false"
        android:textColor="@color/colorOrange"
        android:textSize="20sp"
        android:textStyle="bold"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:layout_margin="0dp"
        android:layout_gravity="start"
        android:textStyle="bold"
        android:textAllCaps="false"
        android:padding="15dp"
        android:textSize="20sp"
        android:textAlignment="textStart"
        android:text="@string/text_howto"
        android:id="@+id/howto"
        android:alpha="0.6"
        android:drawablePadding="5dp"
        android:paddingLeft="50dp"
        android:paddingRight="20dp"
        android:background="@drawable/my_button_bg"
        android:textColor="@color/colorOrange"
        android:drawableLeft="@drawable/ic_live_help_black_24dp"
        
        />
</LinearLayout>

MAIN ACTIVITY JAVA

    package com.example.hp.fruitprint;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.webkit.WebSettings;
    import android.webkit.WebView;
    import android.webkit.WebViewClient;


    public class MainActivity extends AppCompatActivity {

    private WebView webView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void login(View v)  {
        webView = (WebView)findViewById(R.id.home);
        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webView.loadUrl("https://mysitename.com/login");
        webView.setWebViewClient(new WebViewClient());

     }

    }


APP (ACTIVITY) XML

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">



    <WebView
        android:id="@+id/home"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="5dp"/>


    </LinearLayout>

MANIFEST XML

    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.hp.fruitprint">
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
         </activity>
       </application>

    </manifest>

I know i am not doing something right but like i said earlier i am very very new to android programming (started three days ago) so any help will be really appreciated. God bless us all. (please also if you find anything at all i am not doing proper in the codes, kindly point it out, thanks)

