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WebView with HTML in asset folder

main.xml
<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.blogspot.csdevbin.webview.MainActivity">
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Web View"
        android:id="@+id/button"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="132dp" />
</RelativeLayout>
net.xml
<WebView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    />
MainActivity.java
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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

        Button web = (Button) findViewById(R.id.button);
        web.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                Intent in = new Intent(MainActivity.this, Net.class);
                startActivity(in);

            }
        });
    }
}
Net.java
package com.blogspot.csdevbin.webview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;

public class Net extends AppCompatActivity {

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

        WebView webView =(WebView)findViewById(R.id.webview);

        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl("file:///android_asset/a.html");
        setContentView(webView);
    }
}

Where to place Assets folder in Android Studio

Simple follow this
File > New > folder > assets Folder
Note : App must be selected before creating folder.

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