Android WebView 显示白色或空白页面
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WebView Display White or Blank page
提问by Rendy
does anyone know why webview displaying white page? Here is the code
有谁知道为什么 webview 显示白页？这是代码
webView = (WebView) this.findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl(THE_URL);
webView.setWebViewClient(new WebViewClient());
and this functions is also called:
这个函数也被称为：
@Override
public void onPageFinished(WebView view, String url) {
}
am I missing something there? Of course, the error is not from the XML, because the webview only does not display some URL.
我在那里错过了什么吗？当然，错误不是来自XML，因为webview只是不显示一些URL。
Thanks
谢谢
回答by Dom
For anyone still having this issue, it seems that the WebViewClient does not warn you if a secure connection via https has failed. This is likely due to an SSL error on the server you are connecting to.
对于仍然存在此问题的任何人，如果通过 https 的安全连接失败，WebViewClient 似乎不会警告您。这可能是由于您正在连接的服务器上的 SSL 错误。
You can try using http instead if the server allows it.
如果服务器允许，您可以尝试改用 http。
回答by Shankar Agarwal
Refer this link. In your code you are creating two webview clients simultaneously.
请参阅此链接。在您的代码中，您同时创建两个 webview 客户端。
mwebview=(WebView)findViewById(R.id.webview);
mwebview.getSettings().setJavaScriptEnabled(true);
mwebview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mwebview.loadUrl(webUrl);
mwebview.setWebChromeClient(new WebChromeClient() );
回答by Aerrow
Instead of your activity try this,
而不是你的活动试试这个，
main.xml
主文件
<!--?xml version="1.0" encoding="utf-8"?-->
<Linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">
<Textview android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="This is the demo of WebView Client" android:textsize="20sp" android:gravity="center_horizontal">
</Textview>
<Webview android:id="@+id/webview01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_weight="1">
</Webview>
<Imageview android:src="@drawable/ic_launcher" android:layout_height="wrap_content" android:layout_width="fill_parent">
</Imageview></Linearlayout>
WebViewClientDemoActivity.java
WebViewClientDemoActivity.java
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.webkit.WebViewClient;
/*
* Demo of creating an application to open any URL inside the application and clicking on any link from that URl
should not open Native browser but that URL should open in the same screen.
*/
public class WebViewClientDemoActivity extends Activity {
/** Called when the activity is first created. */
WebView web;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
web = (WebView) findViewById(R.id.webview01);
web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("http://www.google.com");
}
public class myWebClient extends WebViewClient
{
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// TODO Auto-generated method stub
view.loadUrl(url);
return true;
}
}
// To handle "Back" key press event for WebView to go back to previous screen.
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {
web.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
In your manifest.xmluse these permisions
在您的manifest.xml 中使用这些权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
回答by Arda
Adjust your container view background and then set
调整您的容器视图背景，然后设置
webView.setBackgroundColor(Color.TRANSPARENT);
