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晚安。我有一个加载特定网页的 webview。然后用户可以选择菜单，然后导航到另外两个指定页面。问题是后两个页面根本不会加载。我不明白为什么，希望得到一些帮助。谢谢你。

public class News extends Activity{
WebView mgebview;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.news);
mgebview = (WebView) findViewById(R.id.webview);
    mgebview.getSettings().setJavaScriptEnabled(true);
    mgebview.loadUrl("http://goo.gl/rQp3tF");

    mgebview.setWebViewClient(new WebViewClient());


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

@Override
public boolean onOptionsItemSelected(MenuItem item) 
{
    switch(item.getItemId()){
    case R.id.bookmark:
        Intent addContact = new Intent(this, BookGoogle.class);
          startActivity(addContact);
          break;
    case R.id.dlrnews:
        //Intent dlr = new Intent (this, DlrNews.class);
        //startActivity(dlr);
        mgebview = (WebView) findViewById(R.id.webview);
        mgebview.getSettings().setJavaScriptEnabled(true);
        mgebview.loadUrl("www.racingblog.com");
        mgebview.setWebViewClient(new WebViewClient());
        break;
    case R.id.gtplanetnews:
        mgebview = (WebView) findViewById(R.id.webview);
        mgebview.getSettings().setJavaScriptEnabled(true);
        mgebview.loadUrl("www.gtplanet.new");
        mgebview.setWebViewClient(new WebViewClient());
        break;
    }
    return super.onOptionsItemSelected(item);
}

}

4

1 回答 1

2

它不起作用的原因是因为您没有返回布尔值！尝试使用此代码：

@Override
public boolean onOptionsItemSelected(MenuItem item) 
{
    switch(item.getItemId()){
    case R.id.bookmark:
        Intent addContact = new Intent(this, BookGoogle.class);
          startActivity(addContact);
          return true;
          break;
    case R.id.dlrnews:
        mgebview.loadUrl("www.racingblog.com");
        return true;
        break;
    case R.id.gtplanetnews:
        mgebview.loadUrl("www.gtplanet.new");z
        return true;
        break;
    default:
      return super.onOptionsItemSelected(item);
    }
}

返回 true 让我们在这里“消费”它。

作为参考：http: //developer.android.com/reference/android/app/Activity.html#onOptionsItemSelected%28android.view.MenuItem%29

我刚刚创建的示例活动，它使用 nexus 7 工作：

包 com.example.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {
    private WebView myWebView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myWebView = (WebView) findViewById(R.id.webView1);
        myWebView.setWebViewClient(new WebViewClient());
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.loadUrl("https://www.google.com/");
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()){
        case R.id.action_settings:
            myWebView.loadUrl("http://stackoverflow.com/questions/19508436/browse-multiple-pages-in-webview-on-menu-selection/19508494#19508494");
            return true;
        }
        return super.onOptionsItemSelected(item);

    }
}

清单确保您添加：<uses-permission android:name="android.permission.INTERNET"></uses-permission>

R.layout.activity_main ：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" />

</RelativeLayout>
于 2013-10-22T03:31:26.993 回答