本地H5植入Android 9.0的js交互以及H5无法请求到网络的和解决

之前写了H5，新建assets目录，将文件拷贝导入

然后写个webviewactivity.class，

package practice.lwp.app_gz_zy_sjtl;

import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.webkit.GeolocationPermissions;
import android.webkit.JavascriptInterface;
import android.webkit.JsPromptResult;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

import org.json.JSONException;
import org.json.JSONObject;

import static android.view.View.GONE;
import static android.view.View.VISIBLE;

/**
 * liwenpeng
 * 2019/5/14 16:56
 * App_GZ_ZY_SJTL
 * Descrobe:
 */
public class WebViewActivity extends AppCompatActivity {

    private WebView mWebView;
    private ProgressBar mProgressBar;
    private WebSettings settings;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);
        initIds();
        initWebSettings();
        initWebViewSettings();
        initData();
    }

    private void initData() {
        mWebView.loadUrl("file:///android_asset/index.html");
    }

    private void initWebViewSettings() {
        mWebView.setWebViewClient(mWebViewClient);
        mWebView.setWebChromeClient(mWebChromeClient);
        mWebView.addJavascriptInterface(new SJTLJavaScriptInterfacec(),"android");
    }

    private class SJTLJavaScriptInterfacec {
        @JavascriptInterface
        public void goBack() {
            WebViewActivity.this.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (mWebView.canGoBack()){
                        mWebView.goBack();
                        Log.d("klwp","canGoBack");
                    }else {
                        Log.d("klwp","else");
                        finish();
                    }
                }
            });


        }
    }

    private void initWebSettings() {
        settings = mWebView.getSettings();
        settings.setBuiltInZoomControls(true);
        settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        settings.setSupportZoom(true);
        settings.setSupportMultipleWindows(true);
        settings.setAppCacheEnabled(true);
        //居中
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);
        settings.setSavePassword(false);
        settings.setSaveFormData(false);
        settings.setAllowFileAccess(true);
        settings.setGeolocationEnabled(true);
        settings.setAppCacheMaxSize(Long.MAX_VALUE);
        settings.setDomStorageEnabled(true);
        settings.setPluginState(WebSettings.PluginState.ON_DEMAND);
        settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
        String dir = this.getDir("database", Context.MODE_PRIVATE).getPath();
        //设置定位的数据库路径
        settings.setGeolocationDatabasePath(dir);
        settings.setJavaScriptCanOpenWindowsAutomatically(true);
        settings.setJavaScriptEnabled(true);
        settings.setBlockNetworkImage(false);
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }

    }

    private void initIds() {
        mWebView = findViewById(R.id.main_webview);
        mProgressBar = findViewById(R.id.pb_brower);
    }
    //WebViewClient主要帮助WebView处理各种通知、请求事件
    private WebViewClient mWebViewClient = new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {//页面加载完成
            mProgressBar.setVisibility(View.GONE);

        }

        @Override
        public void onReceivedSslError(WebView view, android.webkit.SslErrorHandler handler, android.net.http.SslError error) {
            //  super.onReceivedSslError(view, handler, error);
              handler.proceed();
        }

        @Override
        public void onPageStarted(WebView webView, String s, Bitmap bitmap) {
            mProgressBar.setVisibility(View.VISIBLE);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
//            if (!url.startsWith("http") & !url.startsWith("https")) {
//                return false;
//            } else {
                view.loadUrl(url);
                return true;
//            }
        }
    };

    //WebChromeClient主要辅助WebView处理Javascript的对话框、网站图标、网站title、加载进度等
    private WebChromeClient mWebChromeClient = new WebChromeClient() {

        @Override
        public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
            callback.invoke(origin,true,false);
            super.onGeolocationPermissionsShowPrompt(origin, callback);
        }

        @Override
        public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
            return super.onJsPrompt(view, url, message, defaultValue, result);
        }

        @Override
        public void onProgressChanged(WebView view, int newProgress) {
            if (newProgress == 100) {
                mProgressBar.setVisibility(GONE);
            } else {
                if (mProgressBar.getVisibility() == GONE)
                    mProgressBar.setVisibility(VISIBLE);
                mProgressBar.setProgress(newProgress);
            }
            super.onProgressChanged(view, newProgress);
        }
    };

    @Override
    public void onBackPressed() {
        if (mWebView.canGoBack()){
            mWebView.goBack();
        }

        else
            finish();
    }
}

这边我用的是h5的返回，在h5那边要处理下，比如:

当点击图片后调用android这个对象的goBack方法，这个对象我在webviewactivity定义了:

 mWebView.addJavascriptInterface(new SJTLJavaScriptInterfacec(),"android");//android即为h5调用android对象
   private class SJTLJavaScriptInterfacec {
        @JavascriptInterface
        public void goBack() {
            WebViewActivity.this.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (mWebView.canGoBack()){
                        mWebView.goBack();
                        Log.d("klwp","canGoBack");
                    }else {
                        Log.d("klwp","else");
                        finish();
                    }
                }
            });


        }
    }

最后有个问题，h5无法访问到网络，经测试，在6.0手机是可以的，那就是版本兼容性问题（http和https的安全性问题），
解决：
第一步:新建xml文件夹，再新建一个文件

network_security_config.xml:

第2步:
AndroidManifest的application里李加上：

  android:networkSecurityConfig="@xml/network_security_config"

最后注意别忘了加网络权限.然后就能访问了