android - SimpleAdapter 中的 WebView

Question

我用 json 创建 Rss，当我从后台获取 jsonObject 时，在 postExecute 中我用对象结果创建 Map，然后出现错误 LogCat 导致 SimpleAdapter 中的 WebView 出错，为什么没人能帮忙？

LogCat

    12-05 17:55:35.597: E/AndroidRuntime(22543): FATAL EXCEPTION: main
    12-05 17:55:35.597: E/AndroidRuntime(22543): java.lang.IllegalStateException: android.webkit.WebView is not a  view that can be bounds by this SimpleAdapter
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.SimpleAdapter.bindView(SimpleAdapter.java:195)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.SimpleAdapter.createViewFromResource(SimpleAdapter.java:126)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.SimpleAdapter.getView(SimpleAdapter.java:114)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.AbsListView.obtainView(AbsListView.java:2161)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.ListView.makeAndAddView(ListView.java:1831)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.ListView.fillDown(ListView.java:674)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.ListView.fillFromTop(ListView.java:735)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.ListView.layoutChildren(ListView.java:1652)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.AbsListView.onLayout(AbsListView.java:1996)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.View.layout(View.java:14003)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.View.layout(View.java:14003)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.View.layout(View.java:14003)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.View.layout(View.java:14003)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.View.layout(View.java:14003)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1892)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1711)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.Choreographer.doCallbacks(Choreographer.java:562)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.Choreographer.doFrame(Choreographer.java:532)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.os.Handler.handleCallback(Handler.java:725)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.os.Handler.dispatchMessage(Handler.java:92)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.os.Looper.loop(Looper.java:137)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at android.app.ActivityThread.main(ActivityThread.java:5238)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at java.lang.reflect.Method.invokeNative(Native Method)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at java.lang.reflect.Method.invoke(Method.java:511)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
    12-05 17:55:35.597: E/AndroidRuntime(22543):    at dalvik.system.NativeStart.main(Native Method)

源代码

protected void onPostExecute(JSONObject result) {
      super.onPostExecute(result);
      if(result != null){ 

      JSONObject jsn = result;
      try {
        JSONArray jarray = jsn.getJSONArray("item");
        for (int i = 0; i < jarray.length(); i++){
            JSONObject jsno = jarray.getJSONObject(i);
            Log.d("Log", jsno.getString("title"));
             rssMap = new HashMap<String, Object>();
             rssMap.put(TITLE, jsno.getString("title"));
             rssMap.put(CATEGORY, jsno.getString("category"));
             rssMap.put(DATE, jsno.getString("pubDate"));
             rssMap.put(DESCRIPTION, jsno.getString("description"));// This for webView, it's  html code!
             rssView.add(rssMap);
        }
        SimpleAdapter adapter = new SimpleAdapter(
                getApplicationContext(), rssView, R.layout.item, 
                new String[] {TITLE, CATEGORY, DATE, DESCRIPTION}, 
                new int[] {R.id.title, R.id.cat, R.id.date, R.id.desc}
                );
        list.setAdapter(adapter);
      }
      catch (JSONException e) {     
            e.printStackTrace();}
      }
      else{
          /*
           * Тут мне нужен AlertDialog с оповещанием что нету подключения к сети!
           * */
          showDialog(errorShow);      
      }

    }

}

item.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Заголовок"
        android:textColor="#33b5e5"
        android:textSize="23sp" />

    <TextView
        android:id="@+id/date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="05.12.2012"
        android:textColor="#969696"
        android:textSize="14sp" />

    <TextView
        android:id="@+id/cat"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Категория"
        android:textColor="#969696"
        android:textSize="14sp" />

    <WebView
        android:id="@+id/desc"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Answer 1

SimpleAdapter 的 Android 文档指出:

Binding data to views occurs in two phases. First, if a SimpleAdapter.ViewBinder is available, setViewValue(android.view.View, Object, String) is invoked. If the returned value is true, binding has occurred. If the returned value is false, the following views are then tried in order:

• 实现 Checkable 的 View (例如 CheckBox)。预期的绑定(bind)值是一个 bool 值。
• TextView 。预期的绑定(bind)值是一个字符串，并且调用了 setViewText(TextView, String)。
• ImageView。预期的绑定(bind)值是资源 ID 或字符串，并调用 setViewImage(ImageView, int) 或 setViewImage(ImageView, String)。

If no appropriate binding can be found, an IllegalStateException is thrown.

适配器无法自行将您的 jsno.getString("description")(它是一个 String)转换为 URL。您可以尝试转换字符串，然后将其作为 URL 对象放入 rssMap 中，但是，我建议您实现自己的自定义 Adapter 并覆盖 getView() 方法在绑定(bind)期间设置 WebView 的 URL。