How to load a html in webview in android.? [duplicate]

can you please tell me how to load a html in web view in android.

I do the following step .i make www folder in asset folder in that I paste my html and js and css file.

please take a look on picture.Than i write xml code. and java code.

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <WebView android:id="@+id/webView1" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout> 

package com.example.test3;

import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.webkit.WebSettings; import android.webkit.WebView; public class MainActivity extends Activity { WebView web; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); web = (WebView) findViewById(R.id.webView1); web.getSettings().setLoadsImagesAutomatically(true); web.getSettings().setJavaScriptEnabled(true); web.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY); web.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE); web.getSettings().setAppCacheEnabled(false); web.getSettings().setSaveFormData(false); web.loadUrl("file:///android_asset/www/parallel.html"); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } } 

ERROR

04-13 05:36:37.726: E/AndroidRuntime(868): FATAL EXCEPTION: main 04-13 05:36:37.726: E/AndroidRuntime(868): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test3/com.example.test3.MainActivity}: java.lang.NullPointerException 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread.access$600(ActivityThread.java:141) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.os.Handler.dispatchMessage(Handler.java:99) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.os.Looper.loop(Looper.java:137) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread.main(ActivityThread.java:5041) 04-13 05:36:37.726: E/AndroidRuntime(868): at java.lang.reflect.Method.invokeNative(Native Method) 04-13 05:36:37.726: E/AndroidRuntime(868): at java.lang.reflect.Method.invoke(Method.java:511) 04-13 05:36:37.726: E/AndroidRuntime(868): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 04-13 05:36:37.726: E/AndroidRuntime(868): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 04-13 05:36:37.726: E/AndroidRuntime(868): at dalvik.system.NativeStart.main(Native Method) 04-13 05:36:37.726: E/AndroidRuntime(868): Caused by: java.lang.NullPointerException 04-13 05:36:37.726: E/AndroidRuntime(868): at com.example.test3.MainActivity.onCreate(MainActivity.java:19) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.Activity.performCreate(Activity.java:5104) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 04-13 05:36:37.726: E/AndroidRuntime(868): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 04-13 05:36:37.726: E/AndroidRuntime(868): ... 11 more