Android uses webview to load h5 pages, or it can be made into app and embedded in H5 shell

Android uses webview to load h5 pages

Before using webView directly, I encountered some pitfalls. This is the final version to record
the front page java.

package com.xiaocaoer.webviewke;

import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;

import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
    private WebView webview;
    private ConstraintLayout constraintLayout;
    private LinearLayout linearLayout;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            WebView.setWebContentsDebuggingEnabled(true);
        }

        linearLayout = findViewById(R.id.linearLayout01);
        webview = new WebView(MainActivity.this);
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

        webview.setLayoutParams(layoutParams);



        // 清缓存和记录，缓存引起的白屏
        webview.clearCache(true);
        webview.clearHistory();
        webview.requestFocus();

        WebSettings settings = webview.getSettings();

//        loading = findViewById(R.id.loadView);

        settings.setJavaScriptEnabled(true);//必须
        settings.setCacheMode(WebSettings.LOAD_DEFAULT);//关闭webview中缓存
        settings.setRenderPriority(WebSettings.RenderPriority.HIGH);//提高渲染的优先级
        settings.setAllowContentAccess(true);//是否允许在WebView中访问内容URL
        settings.setBuiltInZoomControls(true);//是否使用其内置的变焦机制
        settings.setJavaScriptCanOpenWindowsAutomatically(true);//是否允许自动打开弹窗
        settings.setDomStorageEnabled(true);//是否开启DOM存储API权限
        settings.setDatabaseEnabled(true);
        settings.setUseWideViewPort(true);//WebView是否支持HTML的“viewport”标签或者使用wide viewport。自适应屏幕大小
        //解决支持缩放问题；
        settings.setLoadWithOverviewMode(true);
//        String appCachePath = getApplicationContext().getCacheDir().getAbsolutePath() + "/webcache";
// 设置 Application Caches 缓存目录
//        settings.setAppCachePath(appCachePath);
//        settings.setDatabasePath(appCachePath);
// 应用可以有缓存 true false 没有缓存
//        settings.setAppCacheEnabled(false);





        webview.loadUrl("http://192.168.46.184:8089/");

        webview.setWebChromeClient(new WebChromeClient(){

            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                super.onProgressChanged(view, newProgress);
                Log.d("加载", "on page progress changed and progress is" + newProgress);

            }
        });


        webview.setWebViewClient(new WebViewClient(){
            @Override
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                super.onReceivedError(view, errorCode, description, failingUrl);
                // 加载网页失败时处理  如：
                view.loadDataWithBaseURL(null,
                        "<span>页面加载失败,请确认网络是否连接</span>",
                        "text/html",
                        "utf-8",
                        null);
            }


            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                if (!webview.getSettings().getLoadsImagesAutomatically()) {
                    webview.getSettings().setLoadsImagesAutomatically(true);
                }
                Log.d("加载", "end ");
            }


     /*       @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                // 重写此方法表明点击网页里面的链接还是在当前的webview里跳转，不另跳浏览器
                // 在2.3上面不加这句话，可以加载出页面，在4.0上面必须要加入，不然出现白屏
                if (url.startsWith("http://") || url.startsWith("https://")) {
                    view.loadUrl(url);
                    webview.stopLoading();
                    return true;
                }
                return false;
            }*/

        });




        linearLayout.addView(webview);

    }
}

front page xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity"
    android:id="@+id/constraintLayoutId"
    >

    <LinearLayout
        android:id="@+id/linearLayout01"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="0dp"></LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>