title: webview can't popup softinput on android 4.2.2
body: <p>My <code>HtmlActivity</code> contains webview, progressbar. The webview and progressbar comes from a <code>layout.xml file</code>. In some other devices except android 4.2.2 platfrom, webview works well, after clicked an input box. The <code>inputmethod</code> is pop-up well.</p>
  
  <p>Here is my <code>layout.xml</code></p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:title="http://schemas.android.com/apk/res-auto"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" &gt;
  
      &lt;com.vstar.widget.TitleView
          android:id="@+id/html_title_layout"
          android:layout_width="fill_parent"
          android:layout_height="@dimen/action_bar_height"
          android:background="?attr/theme_base_title_style"
          title:titleViewHomeBackground="?attr/theme_title_back_image"
          title:titleViewHomeText="?attr/theme_title_back_text"
          title:titleViewMenuBackground="?attr/theme_title_more_image"
          title:titleViewMenuPaddBottom="?attr/base_title_padd_bottom"
          title:titleViewMenuPaddTop="?attr/base_title_padd_bottom"
          title:titleViewMenuText="?attr/theme_title_more_text"
          title:titleViewTitleBackground="?attr/theme_title_more_text" /&gt;
  
      &lt;ProgressBar
          android:id="@+id/html_progress"
          style="?android:attr/progressBarStyleHorizontal"
          android:layout_width="fill_parent"
          android:layout_height="2dp"
          android:focusable="false"
          android:max="100" /&gt;
  
      &lt;com.vstar.widget.ScrollWebView
          android:id="@+id/webview"
          android:layout_width="fill_parent"
          android:layout_height="0dp"
          android:layout_weight="1"
          android:focusable="true" /&gt;
  
      &lt;RelativeLayout
          android:layout_width="fill_parent"
          android:layout_height="@dimen/action_bar_height"
          android:background="?attr/theme_html_bottom_background" &gt;
  
          &lt;ImageButton
              android:id="@+id/html_menu_back"
              android:layout_width="wrap_content"
              android:layout_height="fill_parent"
              android:layout_margin="@dimen/small_half"
              android:background="@drawable/base_selector_html_bottom_back" /&gt;
  
          &lt;ImageButton
              android:id="@+id/html_menu_forward"
              android:layout_width="wrap_content"
              android:layout_height="fill_parent"
              android:layout_margin="@dimen/small_half"
              android:layout_toRightOf="@+id/html_menu_back"
              android:background="@drawable/base_selector_html_bottom_forward" /&gt;
  
          &lt;ImageButton
              android:id="@+id/html_menu_stop"
              android:layout_width="wrap_content"
              android:layout_height="fill_parent"
              android:layout_alignParentRight="true"
              android:layout_margin="@dimen/small_half"
              android:background="@drawable/base_selector_html_bottom_stop" /&gt;
      &lt;/RelativeLayout&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Any help would be great.Thanks.</p>