关于android调用浏览器问题，请各位大侠给予指点，程序贴出，在线等候！
出现的问题是，在没加上
MyWebViewClient myWebView=new MyWebViewClient();
webview.setWebViewClient(myWebView);
这两段程序，是好用的，能够调出给出的url，但是加上上面的那两段程序后，就报错，报的错误是“the application has stopped unexpectedly”，android程序开发新手，请各位大侠给予指点，多谢多谢了！
具体的程序代码如下，在线等候！

activity程序：

public class MainActivity extends Activity {
private WebView mWebView;
private ProgressDialog dialog;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.mainoa);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setPluginsEnabled(true);
mWebView.requestFocus();
//取消滚动条
//this.setScrollBarStyle(SCROLLBARS_OUTSIDE_OVERLAY);
mWebView.loadUrl("http://www.baidu.com/");
MyWebViewClient myWebView=new MyWebViewClient();
mWebView.setWebViewClient(myWebView);

}

@Override//设置回退
public boolean onKeyDown(int keyCode, KeyEvent event) {
if((keyCode==KeyEvent.KEYCODE_BACK) || mWebView.canGoBack()){
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
protected Dialog onCreateDialog(int id) {
//实例化进度条对话框
dialog=new ProgressDialog(this);
/*//可以不显示标题
dialog.setTitle("正在加载，请稍候！");*/
dialog.setIndeterminate(true);
dialog.setMessage("正在加载，请稍候！");
dialog.setCancelable(true);
return dialog;
}


private class MyWebViewClient extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}

/*
* 在加载页面 结束时响应
*/
@Override
public void onPageFinished(WebView view, String url) {
dialog.dismiss();
}

/*
* 在加载出错时响应
*/
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// TODO Auto-generated method stub
super.onReceivedError(view, errorCode, description, failingUrl);
dialog.dismiss();
}
}

}

lay_out程序
<?xml version="1.0" encoding="utf-8"?>
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mainoa"
android:layout_width="match_parent"
android:layout_height="match_parent" >


</WebView>


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

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.zloa.MainActivity"
android:label="@string/title_activity_oa_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

</activity>
</application>

</manifest>
[解决办法]
MyWebViewClient myWebView=new MyWebViewClient();

这句改成WebViewClient myWebView=new WebViewClient(); 试试