Android Studio封装APK

package com.lmm.myapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
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);


        webView = new WebView(this);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClientDiy(this));
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        webView.getSettings().setDomStorageEnabled(true);
        webView.getSettings().setAppCacheEnabled(true);


        webView.loadUrl("http://www.sdyztech.com/");



        setContentView(webView);
    }
}

package com.lmm.myapp;

import android.content.Context;
import android.webkit.WebViewClient;

public class WebViewClientDiy extends WebViewClient {
    Context context;
    public WebViewClientDiy(Context context){
        this.context =context;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lmm.myapp">

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/icon"
        android:label="@string/app_name"
        android:roundIcon="@drawable/icon"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppCompat.Light.NoActionBar">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>