WebView的使用

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package com.linghang.yunmeng.base.web;import android.annotation.SuppressLint;import android.app.ActionBar;import android.app.ProgressDialog;import android.content.Context;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.PersistableBundle;import android.support.annotation.NonNull;import android.support.v7.app.AppCompatActivity;import android.text.TextUtils;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;public class WebViewActivity extends AppCompatActivity{    static WebViewActivity activity;    ProgressDialog progressDialog;    private WebView webView;    @Override    public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {        super.onCreate(savedInstanceState, persistentState);        activity = this;        String url = getIntent().getStringExtra("url");        if (url.startsWith("http")) {            startWebView(url);        } else {            //从assets读            startWebViewFromAsset(url);        }        webView.getTitle();    }    @Override    protected void onDestroy() {        super.onDestroy();        activity = null;    }    @SuppressLint({"SetJavaScriptEnabled", "JavascriptInterface"})    private void startWebView(String url) {        if (TextUtils.isEmpty(url)) {            return;        }        if (progressDialog == null) {            // in standard case YourActivity.this            progressDialog = new ProgressDialog(WebViewActivity.this);            progressDialog.setMessage("Loading...");            progressDialog.show();        }        webView.setWebViewClient(new WebViewClient() {            //不跳转到外部浏览器            public boolean shouldOverrideUrlLoading(WebView view, String url) {                if (url.startsWith("tel:")) {                    Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));                    startActivity(intent);                } else {                    view.loadUrl(url);                }                return true;            }            public void onLoadResource(WebView view, String url) {            }            public void onPageFinished(WebView view, String url) {                try {                    if (progressDialog.isShowing()) {                        progressDialog.dismiss();                        progressDialog = null;                    }                } catch (Exception exception) {                    exception.printStackTrace();                }            }        });        // Javascript inabled on webview        webView.getSettings().setJavaScriptEnabled(true);//        webView.getSettings().setJavaScriptEnabled(true);  //支持js//        webView.getSettings().setUseWideViewPort(false);  //将图片调整到适合webview的大小//        webView.getSettings().setSupportZoom(true);  //支持缩放//        webView.getSettings().setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN); //支持内容重新布局//        webView.getSettings().supportMultipleWindows();  //多窗口//        webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);  //关闭webview中缓存        webView.getSettings().setAllowFileAccess(true);  //设置可以访问文件//        webView.getSettings().setNeedInitialFocus(true); //当webview调用requestFocus时为webview设置节点//        webView.getSettings().setBuiltInZoomControls(true); //设置支持缩放//        webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); //支持通过JS打开新窗口//        webView.getSettings().setLoadWithOverviewMode(true); // 缩放至屏幕的大小        webView.getSettings().setLoadsImagesAutomatically(true);  //支持自动加载图片        webView.getSettings().setAppCacheEnabled(true);//        webView.getSettings().setAppCachePath(FILE_PATH.cache);//        webView.setWebChromeClient(//                new InjectedChromeClient("Model", HostJsScope.class) {//                    @Override//                    public void onReceivedTitle(WebView view, String title) {//                        super.onReceivedTitle(view, title);////                        if (isEmpty(titleView.getText().toString())) {//                            titleView.setText(title);//                        }////                    }//                }//        );        /*         String summary = "<html><body>You scored <b>192</b> points.</body></html>";         webview.loadData(summary, "text/html", null);         */        //Load url in webview        webView.loadUrl(url);//        webView.loadUrl("file:///android_asset/html/agreement.html");    }//    public static class HostJsScope {//        public static void getIDsMsg(WebView webView, final int gid, final int pid) {//            Log.d(AppConst.TAG, String.format("enterGoodDetail: %d %d", gid, pid));//            if (activity != null) {//                activity.startActivity(GoodDetailActivity.getCallingIntent(//                        activity, false, "" + gid, "" + pid));//            }//        }//    }    private void startWebViewFromAsset(String filename) {        WebSettings webSettings = webView.getSettings();        webSettings.setLoadWithOverviewMode(true);        webSettings.setUseWideViewPort(true);        webView.loadUrl("file:///android_asset/html/" + filename);    }    @Override    public void onBackPressed() {        if (webView.canGoBack()) {            webView.goBack();        } else {            super.onBackPressed();        }    }}

加载HTML代码的时候：

webView.loadData(Html.fromHtml(url).toString(), "text/html", "utf-8"); //此方法会导致乱码webView.loadDataWithBaseURL(null, Html.fromHtml(conent).toString(), "text/html", "utf-8", null);

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