Android浏览器无法打开网页

你好，我是新来的android和我写了一个“简单的网络浏览器”的小应用程序。但我的浏览器无法打开页面，它显示错误，如没有网络可用（网页不可用）甚至无线开启，并且正常的浏览器正在该设备上工作。Android浏览器无法打开网页

请检查下面的代码:: SimpleBrowser.java

package com.thenewboston.travis; 

import android.app.Activity; 
import android.os.Bundle; 
import android.text.Editable; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.webkit.WebView; 
import android.widget.Button; 
import android.widget.EditText; 

public class SimpleBrowser extends Activity implements OnClickListener{ 

    Button bGo,bBack,bForward,bHistory,bRefresh; 
    EditText et; 
    WebView wb; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.simplebrowser); 

     bGo = (Button)findViewById(R.id.go); 
     bBack = (Button)findViewById(R.id.bBack); 
     bForward = (Button)findViewById(R.id.bForward); 
     bHistory = (Button)findViewById(R.id.bHistory); 
     bRefresh = (Button)findViewById(R.id.bRefresh); 
     et = (EditText)findViewById(R.id.editAddress); 
     wb = (WebView)findViewById(R.id.webView); 
     wb.setWebViewClient(new ourViewClient()); 

     bGo.setOnClickListener(this); 
     bBack.setOnClickListener(this); 
     bForward.setOnClickListener(this); 
     bHistory.setOnClickListener(this); 
     bRefresh.setOnClickListener(this); 

     //wb.loadUrl("http://www.gmail.com"); 





    } 
    @Override 
    public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
     switch(arg0.getId()) 
     { 
     case R.id.go: 
      String website = et.getText().toString(); 
      wb.loadUrl(website);    
      break; 
     case R.id.bBack: 
      if(wb.canGoBack()) 
      wb.goBack(); 

      break; 
     case R.id.bForward: 
      if(wb.canGoForward()) 
      wb.goForward(); 
      break; 
     case R.id.bHistory: 
      wb.clearHistory(); 

      break; 
     case R.id.bRefresh: 
      wb.reload(); 

      break; 

     } 

    } 



}

ourViewClient.java

package com.thenewboston.travis; 

import android.webkit.WebView; 
import android.webkit.WebViewClient; 

public class ourViewClient extends WebViewClient { 

    @Override 
    public boolean shouldOverrideUrlLoading(WebView view, String url) { 
     // TODO Auto-generated method stub 
     view.loadUrl(url); 
     return true; 
    } 



}

和.... 的Manifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.thenewboston.travis" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
    android:minSdkVersion="10" 
    android:targetSdkVersion="17" /> 
    <uses-permission android:name="android.permission.SET_WALLPAPER"/> 
    <uses-permission android:name="android.permission.WAKE_LOCK"/> 
    <uses-permission android:name="android.permission.INTERNET"/> 

    <application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="KCRaju" 
    android:theme="@style/AppTheme"> 
    <activity 
     android:name="com.thenewboston.travis.Splash" 
     android:label="KCRaju" 
     android:screenOrientation="portrait" > 
     <intent-filter> 
     <action android:name="android.intent.action.MAIN" /> 
     <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".StartingPoint" 
     android:label="KCRaju" > 
     <intent-filter> 
     <action android:name="com.thenewboston.travis.STARTINGPOINT" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".Menu" 
     android:label="KCRaju" > 
     <intent-filter> 
     <action android:name="com.thenewboston.travis.MENU" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".prefs" 
     android:label="KCRaju" > 
     <intent-filter> 
     <action android:name="com.thenewboston.travis.prefs" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".About" 
     android:label="KCRaju" 
     android:theme="@android:style/Theme.Dialog" > 
     <intent-filter> 
     <action android:name="com.thenewboston.travis.About" /> 
     <category android:name="android.intent.category.DEFAULT" /> 

     </intent-filter> 
    </activity> 
     <activity android:name=".TextPlay" android:label="@string/app_name" > 
    </activity> 
     <activity android:name=".Email" android:label="@string/app_name" > 
    </activity> 
     <activity android:name=".Camera" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".Data" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".GFX" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".GFXSurface" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".SoundStuff" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".Slider" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".Memory" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".OpenedClass" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".Tabs" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    <activity android:name=".SimpleBrowser" android:label="@string/app_name" android:screenOrientation="portrait" > 
    </activity> 
    </application> 

</manifest>

来源

2013-05-21 StackOverflow