的布局应与此类似：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 android:layout_height="fill_parent"
                 android:layout_width="fill_parent"
                 android:orientation="vertical">
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <Button android:id="@+id/button1"
                android:layout_width="0dip"
                android:layout_height="wrap_content"                
                android:layout_gravity="top"
                android:layout_weight="1"/>
            <Button android:id="@+id/button2"
                android:layout_width="0dip"
                android:layout_height="wrap_content"                
                android:layout_gravity="top"
                android:layout_weight="1" />
        </LinearLayout>
        <WebView 
            android:id="@+id/webview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"/>
</LinearLayout>

而且你还可以参考Need帮助现货Android浏览器切换到的WebView 看到，如果你正确地启动URL。

And you can also refer to the Need help changing from stock android browser to webview to see if you are launching the url correctly.