解决WebView通过URL加载H5界面出现空白的问题

webview.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}

@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
//在这里执行你想调用的js函数
if(!flag_get_deviceid){
load();
}
}

@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}

});

private boolean flag_get_deviceid=false;
public void load(){
String key="";
String androidID="";
try{
androidID = Secure.getString(getContentResolver(),Secure.ANDROID_ID);
Log.d(TAG, "androidID:"+androidID);}catch(Exception e){
Log.e(TAG, "");
}finally{
String script=String.format("javascript:getDeviceID('"+androidID+"')");
webActDetail.evaluateJavascript(script, new ValueCallback<String>() {

@Override
public void onReceiveValue(String value) {
Log.d(TAG, "onReceiveValue value=" + value);

if(value!=null){
flag_get_deviceid=true;
}
}});
}
}

  // 设置缓存
  webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
  // 不设置缓存
  // webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
  // 清理缓存
  webView.clearCache(true);
  // 清理历史记录
  webView.clearHistory();
  // 清理cookies
  CookieSyncManager.createInstance(this);
  CookieSyncManager.getInstance().startSync();
  CookieManager.getInstance().removeSessionCookie();
  // 设置可以支持缩放
  webView.getSettings().setSupportZoom(true);
  // 设置出现缩放工具
  webView.getSettings().setBuiltInZoomControls(true);
  webView.getSettings().setJavaScriptEnabled(true);

int index = 0;
 
String [] strList = new String[]{"https://www.jb51.net",
"https://www.jd.com","https://www.csdn.net",https://www.baidu.com};

// 直接创建WebViewClient
  webView.setWebViewClient(new WebViewClient() {
   @Override
   public void onPageFinished(WebView view, String url) {
    super.onPageFinished(view, url);
    index++;
    if(index>artStr.length){
 
    }else {
     webView.clearCache(true);
     webView.clearView();
     Log.i("===onPageFinished====", index + "=======");
     refreshWebpage(index);
    }
   }
  });

 public void refreshWebpage(int index) {
  String csdnStr = urlStr + artStr[index];
 
  // 直接调用url
  webView.loadUrl(csdnStr);
 }