Android WebView 未加载 JavaScript 文件,但 Android 浏览器可以正常加载

发布于 2024-09-04 06:54:43 字数 5593 浏览 3 评论 0原文

我正在编写一个连接到后台站点的应用程序。后台站点包含大量 JavaScript 函数,至少是普通站点的 100 倍。不幸的是,它不会加载它们,并导致许多功能无法正常工作。所以我正在进行测试。我在我的服务器上放置了一个加载 FireBugLite javascript 文本的页面。它有很多 javascript,非常适合测试并查看 Android WebView 是否会加载它。 WebView 不加载任何内容,但浏览器加载 Firebug 图标。到底有什么区别,为什么它可以在浏览器中运行而不是在我的 WebView 中运行?任何建议。

更多背景信息,为了在 Droid(或除 Windows 之外的任何其他平台)上使用这个令人讨厌的后台应用程序,我需要欺骗 bakcoffice 应用程序,让其相信访问该网站的是 Internet Explorer。我通过修改 WebView 用户代理来做到这一点。

另外,对于这个应用程序,我已经精简了我的登陆页面,这样我就可以给你提供帮助的来源。

package ksc.myKMB;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings; 
import android.webkit.WebViewClient;
import android.widget.Toast;

public class myKMB extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); /** Performs base set up */

        /** Create a Activity of this Activity, IE myProcess */
        myProcess = this;

        /*** Create global objects and web browsing objects */
        HideDialogOnce = true;
        webview = new WebView(this) {

        };
        webChromeClient = new WebChromeClient() {
         public void onProgressChanged(WebView view, int progress) {
                // Activities and WebViews measure progress with different scales.
                // The progress meter will automatically disappear when we reach 100%
          myProcess.setProgress((progress * 100));
          //CreateMessage("Progress is : " + progress);
              }
        };
        webViewClient = new WebViewClient() {
          public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                 Toast.makeText(myProcess, MessageBegText + description + MessageEndText, Toast.LENGTH_SHORT).show();
               }  
          public void onPageFinished (WebView view, String url) {
              /** Hide dialog */
           try {
           // loadingDialog.dismiss();  
           } finally {

           }

           //myProcess.setProgress(1000);
           /** Fon't show the dialog while I'm performing fixes */
              //HideDialogOnce = true;
view.loadUrl("javascript:document.getElementById('JTRANS011').style.visibility='visible';");

          }

          public void onPageStarted(WebView view, String url, Bitmap favicon) {

       if (HideDialogOnce == false) {
         //loadingDialog = ProgressDialog.show(myProcess, "", 
                //   "One moment, the page is laoding...", true);
       } else {
        //HideDialogOnce = true;
       }
      }

    };


    getWindow().requestFeature(Window.FEATURE_PROGRESS);
            webview.setWebChromeClient(webChromeClient);
    webview.setWebViewClient(webViewClient);
    setContentView(webview);


    /** Load the Keynote Browser Settings */
    LoadSettings();
    webview.loadUrl(LandingPage);


}

    /** Get Menu */
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
     MenuInflater inflater = getMenuInflater();
     inflater.inflate(R.menu.menu, menu);
     return true;
    }

    /** an item gets pushed */
    @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  // We have only one menu option
  case R.id.quit:
   System.exit(0);
   break;
  case R.id.back:
   webview.goBack();
  case R.id.refresh:
   webview.reload();
  case R.id.info:
   //IncludeJavascript("");
  }
  return true;
 }


/** Begin Globals */
public WebView webview;
public WebChromeClient webChromeClient;
public WebViewClient webViewClient;
public ProgressDialog loadingDialog; 
public Boolean HideDialogOnce; 
public Activity myProcess;
public String OverideUserAgent_IE = "Mozilla/5.0 (Windows; MSIE 6.0; Android 1.6; en-US) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Safari/523.12.2 myKMB/1.0";
public String LandingPage = "http://kscserver.com/main-leap-slim.html";
public String MessageBegText = "Problem making a connection, Details: ";
public String MessageEndText = " For Support Call: (xxx) xxx - xxxx.";

public void LoadSettings() {

 webview.getSettings().setUserAgentString(OverideUserAgent_IE);
 webview.getSettings().setJavaScriptEnabled(true);
 webview.getSettings().setBuiltInZoomControls(true);
 webview.getSettings().setSupportZoom(true);
}

/** Creates a message alert dialog */
public void CreateMessage(String message) {

 AlertDialog.Builder builder = new AlertDialog.Builder(this);
 builder.setMessage(message)
        .setCancelable(true)
        .setNegativeButton("Close", new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int id) {
           dialog.cancel();
          }
        });
 AlertDialog alert = builder.create();
 alert.show();
}


}

后台应用程序是我的应用程序,在模拟器中运行。最上面的应用程序是浏览器。您将看到浏览器有 firebug 图标,并且可以激活 firebug,但应用程序没有 firebug 图标。 http://img413.imageshack.us/img413/9628/myapp.gif

我的应用程序正在后台运行,正如您在右下角看到的那样,没有 Firebug。然而,浏览器(顶部的模拟器)具有相同的页面,但显示萤火虫。我做错了什么?我假设没有足够的内存分配给应用程序、进程功率分配或物理内存。我不知道,我只知道结果很奇怪。

我从我的 Android 设备上得到了同样的结果,应用程序没有显示萤火虫,但浏览器显示萤火虫。

我已经在网络浏览器上安装了 JavaScript,问题是网络视图的行为与网络浏览器不同。

I'm writing an application which connects to a back office site. The backoffice site contains a whole slew of JavaScript functions, at least 100 times the average site. Unfortunately it does not load them, and causes much of the functionality to not work properly. So I am running a test. I put a page out on my server which loads the FireBugLite javascript text. Its a lot of javascript and perfect to test and see if the Android WebView will load it. The WebView loads nothing, but the browser loads the Firebug Icon. What on earth would make the difference, why can it run in the browser and not in my WebView? Any suggestions.

More background information, in order to get the stinking backoffice application available on a Droid (or any other platform except windows) I needed to trick the bakcoffice application to believe what's accessing the website is Internet Explorer. I do this by modifying the WebView User Agent.

Also for this application I've slimmed my landing page, so I could give you the source to offer me aid.

package ksc.myKMB;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings; 
import android.webkit.WebViewClient;
import android.widget.Toast;

public class myKMB extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); /** Performs base set up */

        /** Create a Activity of this Activity, IE myProcess */
        myProcess = this;

        /*** Create global objects and web browsing objects */
        HideDialogOnce = true;
        webview = new WebView(this) {

        };
        webChromeClient = new WebChromeClient() {
         public void onProgressChanged(WebView view, int progress) {
                // Activities and WebViews measure progress with different scales.
                // The progress meter will automatically disappear when we reach 100%
          myProcess.setProgress((progress * 100));
          //CreateMessage("Progress is : " + progress);
              }
        };
        webViewClient = new WebViewClient() {
          public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                 Toast.makeText(myProcess, MessageBegText + description + MessageEndText, Toast.LENGTH_SHORT).show();
               }  
          public void onPageFinished (WebView view, String url) {
              /** Hide dialog */
           try {
           // loadingDialog.dismiss();  
           } finally {

           }

           //myProcess.setProgress(1000);
           /** Fon't show the dialog while I'm performing fixes */
              //HideDialogOnce = true;
view.loadUrl("javascript:document.getElementById('JTRANS011').style.visibility='visible';");

          }

          public void onPageStarted(WebView view, String url, Bitmap favicon) {

       if (HideDialogOnce == false) {
         //loadingDialog = ProgressDialog.show(myProcess, "", 
                //   "One moment, the page is laoding...", true);
       } else {
        //HideDialogOnce = true;
       }
      }

    };


    getWindow().requestFeature(Window.FEATURE_PROGRESS);
            webview.setWebChromeClient(webChromeClient);
    webview.setWebViewClient(webViewClient);
    setContentView(webview);


    /** Load the Keynote Browser Settings */
    LoadSettings();
    webview.loadUrl(LandingPage);


}

    /** Get Menu */
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
     MenuInflater inflater = getMenuInflater();
     inflater.inflate(R.menu.menu, menu);
     return true;
    }

    /** an item gets pushed */
    @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  // We have only one menu option
  case R.id.quit:
   System.exit(0);
   break;
  case R.id.back:
   webview.goBack();
  case R.id.refresh:
   webview.reload();
  case R.id.info:
   //IncludeJavascript("");
  }
  return true;
 }


/** Begin Globals */
public WebView webview;
public WebChromeClient webChromeClient;
public WebViewClient webViewClient;
public ProgressDialog loadingDialog; 
public Boolean HideDialogOnce; 
public Activity myProcess;
public String OverideUserAgent_IE = "Mozilla/5.0 (Windows; MSIE 6.0; Android 1.6; en-US) AppleWebKit/525.10+ (KHTML, like Gecko) Version/3.0.4 Safari/523.12.2 myKMB/1.0";
public String LandingPage = "http://kscserver.com/main-leap-slim.html";
public String MessageBegText = "Problem making a connection, Details: ";
public String MessageEndText = " For Support Call: (xxx) xxx - xxxx.";

public void LoadSettings() {

 webview.getSettings().setUserAgentString(OverideUserAgent_IE);
 webview.getSettings().setJavaScriptEnabled(true);
 webview.getSettings().setBuiltInZoomControls(true);
 webview.getSettings().setSupportZoom(true);
}

/** Creates a message alert dialog */
public void CreateMessage(String message) {

 AlertDialog.Builder builder = new AlertDialog.Builder(this);
 builder.setMessage(message)
        .setCancelable(true)
        .setNegativeButton("Close", new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int id) {
           dialog.cancel();
          }
        });
 AlertDialog alert = builder.create();
 alert.show();
}


}

The background Application is my app, running in an emulator. The top application is the browser. You'll see the browser has the firebug icon, and can activate the firebug, but the application does not have the firebug icon. http://img413.imageshack.us/img413/9628/myapp.gif

My Application is running in the background, and as you can see no Firebug in the lower right hand corner. However the browser (the emulator on top) has the same page but shows the firebug. What am I doing wrong? I'm assuming its either not enough memory allocated to the application, process power allocation, or a physical memory thing. I can't tell, all I know is the results are strange.

I get the same thing form my android device, the application shows no firebug but the browser shows the firebug.

I already have JavaScript on the web browser on, the problem is the web view is acting to different from the web browser.

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。

评论(1

我只土不豪 2024-09-11 06:54:43

对我来说效果很好。我可以在 WebView 中看到 FireBug 图标。

这行是邪恶的,我想你应该删除它:

webview.getSettings().setUserAgentString(OverideUserAgent_IE);

Works just great for me. I can see FireBug icon in WebView.

This line is evil, I guess you should remove it:

webview.getSettings().setUserAgentString(OverideUserAgent_IE);
~没有更多了~
我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
原文