Android 在悬浮Dialog中显示WebView

在弹出Dialog 显示WebView 要点：

public void onPageFinished(WebView view, String url)
{
super.onPageFinished(view, url);  
//防止黑背景问题 setContentView(binding.getRoot());
}

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

import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.text.TextUtils;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceError;
import android.webkit.WebResourceRequest;
import android.webkit.WebResourceResponse;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import androidx.constraintlayout.widget.ConstraintLayout;



import java.util.Objects;

public class FloatWebViewDialog extends Dialog {
    private ConstraintLayout constraintLayoutLoading;
    private WebView about_web_wb;
    private FloatWebBinding binding;
    private String url;
    private String title;

    @SuppressLint("InflateParams")
    public FloatWebViewDialog(Context context) {
        super(context);
    }

    //WebViewClient主要帮助WebView处理各种通知、请求事件
    private final WebViewClient webViewClient = new WebViewClient() {

        @Override
        public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
            MyLog.i("onReceivedError:" + error.toString());
            super.onReceivedError(view, request, error);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String urlstr) {
            MyLog.i("拦截url:" + urlstr);
            try {
                if (urlstr.startsWith("http://") || urlstr.startsWith("https://"))
                    view.loadUrl(urlstr);
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
            return true;
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            MyLog.e("onPageFinished:" + url);
            //防止黑背景问题
            setContentView(binding.getRoot());
        }

        //拦截并加载
        @SuppressLint("NewApi")
        @Override
        public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
            if (request != null && request.getUrl() != null)
                MyLog.e("url :" + request.getUrl());
            return super.shouldInterceptRequest(view, request);
        }
    };

    private final WebChromeClient webChromeClient = new WebChromeClient() {
        //        不支持js的alert弹窗，需要自己监听然后通过dialog弹窗
        @Override
        public boolean onJsAlert(WebView webView, String url, String message, JsResult result) {
            AlertDialog.Builder localBuilder = new AlertDialog.Builder(webView.getContext());
            localBuilder.setMessage(message).setPositiveButton("确定", null);
            localBuilder.setCancelable(false);
            localBuilder.create().show();
            //注意:
            //必须要这一句代码:result.confirm()表示:
            //处理结果为确定状态同时唤醒WebCore线程
            //否则不能继续点击按钮
            result.confirm();
            return true;
        }

        //加载进度回调
        @Override
        public void onProgressChanged(WebView view, int newProgress) {
            constraintLayoutLoading.setVisibility(newProgress == 100 ? GONE : VISIBLE);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = FloatWebBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());
           Objects.requireNonNull(dialog.getWindow()).setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
        dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
        dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);
        //放在 window 的之后 先不动
//        if (NotchScreenManager.getInstance().getNotchScreenInfo().hasNotch)
//            NotchScreenManager.getInstance().setDisplayInNotch(dialog.getWindow());
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            WindowManager.LayoutParams lp
                    = dialog.getWindow().getAttributes();
            lp.layoutInDisplayCutoutMode =
                    WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES;
            dialog.getWindow().setAttributes(lp);
        }
        StatusBarUtils.getInstance().hideBottomUIMenu(dialog.getWindow());
        dialog.setCancelable(false);
        Objects.requireNonNull(getWindow()).setBackgroundDrawableResource(R.color.black_72);
        getWindow().getDecorView().setOnTouchListener((v, event) -> {
            dismiss();
            return true;
        });
        constraintLayoutLoading = binding.dialogClLoading;//进度条
        binding.floatWvCloseIv.setOnClickListener(v -> dismiss());
        about_web_wb = binding.floatWv;
        //使用webview显示html代码
        //webView.loadDataWithBaseURL(null,"<html><head><title> 欢迎您 </title></head>" +
        // "<body><h2>使用webview显示 html代码</h2></body></html>", "text/html" , "utf-8", null);
//        about_web_wb.addJavascriptInterface(this, "android");//添加js监听 这样html就能调用客户端
        about_web_wb.setWebViewClient(webViewClient);
        about_web_wb.setWebChromeClient(webChromeClient);

        WebSettings webSettings = about_web_wb.getSettings();
        webSettings.setJavaScriptEnabled(true);//允许使用js
        webSettings.setUseWideViewPort(true); // 关键点
        webSettings.setSupportZoom(true);

        webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);//不使用缓存，只从网络获取数据.
//        webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
//        支持屏幕缩放
        webSettings.setSupportZoom(false);
        webSettings.setBuiltInZoomControls(true);
        webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        about_web_wb.loadUrl(url);
        if (!TextUtils.isEmpty(title))
            binding.floatWvTitleTv.setText(title);
    }

    @Override
    public void dismiss() {
        super.dismiss();
    }

    @SuppressLint("SetJavaScriptEnabled")
    public void show(String url, String title) {
        this.url = url;
        this.title = title;
        if (!isShowing())
            show();
        if (binding != null) {
            binding.floatWvTitleTv.setText(title);
            about_web_wb.loadUrl(url);
        }
    }
}