我使用 AsyncTask 从服务器获取数据，为我的 listview 构建适配器。但是，如果我在 AsyncTask 中使用 ProgressDialog，则会出现错误。
代码:
文件 AsyncTaskSetAdapterListViewDetail.java
public class AsyncTaskSetAdapterListViewDetail extends AsyncTask<Void, Void, List<Map<String, Object>>> {
private final String query;
private final Context ctx;
private final ProgressDialog Loading;
public final HashMap<String, Object> Data;
private final View listv;
public AsyncTaskSetAdapterListViewDetail(final String query, final Context ctx, View listv, HashMap<String, Object> Data) {
this.query = query;
this.ctx = ctx;
this.Loading = new ProgressDialog(ctx);
this.listv = listv;
this.Data = Data;
}
@Override
protected void onPreExecute(){
super.onPreExecute();
Loading.setMessage("Loading...");
Loading.setCancelable(false);
Loading.show();
}
@Override
protected List<Map<String, Object>> doInBackground(final Void... voids) {
List<Map<String, Object>> BrightCoveData = new ArrayList<Map<String, Object>>();
BrightCoveClient bcClient = new BrightCoveClient();
String QueryType = (String) Data.get("QueryType");
if(QueryType == "bccategory")
{
BrightCoveData = bcClient.QueryData(query, ctx);
}
else if(QueryType == "bcplaylist")
{
BrightCoveData = bcClient.QueryDataPlaylist(query, ctx);
}
return BrightCoveData;
}
@Override
protected void onPostExecute(List<Map<String, Object>> result) {
super.onPostExecute(result);
String[] fromStr = (String[]) Data.get("StringFrom");
int[] toInt = (int[]) Data.get("ToInt");
String strClass = listv.getClass().toString();
String[] typeView = strClass.split("\\.");
int resource = (Integer) Data.get("Resource");
String type = typeView[typeView.length - 1];
for (Map<String, Object> map : result) {
String videoID = map.get("videoID").toString();
String name = map.get("title").toString();
String description = map.get("description").toString();
String duration = map.get("duration").toString();
if (!VideoFunctions.isVideoExisted(videoID)) {
VideoFunctions.addVideo(videoID, name, "", description, duration, "");
}
}
ListAdapter adapter = new OoyalaVideoListAdapter(ctx, result, resource, fromStr,toInt);
if ( type.equalsIgnoreCase("ListView")) {
((ListView) listv).setAdapter(adapter);
}
else {
((AbsSpinner) listv).setAdapter((SpinnerAdapter) adapter);
}
if (Loading.isShowing()){
Loading.dismiss();
}
}
}
错误:
12-20 16:04:15.347: E/AndroidRuntime(13344):
java.lang.IllegalArgumentException:
View=com.android.internal.policy.impl.PhoneWindow$DecorView{422262a8
V.E..... R.....I. 0,0-0,0} not attached to window manager 12-20
16:04:15.347: E/AndroidRuntime(13344): at
android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:370)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:299)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:84)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
android.app.Dialog.dismissDialog(Dialog.java:329) 12-20 16:04:15.347:
E/AndroidRuntime(13344): at
android.app.Dialog.dismiss(Dialog.java:312) 12-20 16:04:15.347:
E/AndroidRuntime(13344): at
RanhTV.Utils.AsyncTaskSetAdapterListView.onPostExecute(AsyncTaskSetAdapterListView.java:90)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
RanhTV.Utils.AsyncTaskSetAdapterListView.onPostExecute(AsyncTaskSetAdapterListView.java:1)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
android.os.AsyncTask.finish(AsyncTask.java:632) 12-20 16:04:15.347:
E/AndroidRuntime(13344): at
android.os.AsyncTask.access$600(AsyncTask.java:177) 12-20
16:04:15.347: E/AndroidRuntime(13344): at
android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
android.os.Handler.dispatchMessage(Handler.java:102) 12-20
16:04:15.347: E/AndroidRuntime(13344): at
android.os.Looper.loop(Looper.java:136) 12-20 16:04:15.347:
E/AndroidRuntime(13344): at
android.app.ActivityThread.main(ActivityThread.java:5017) 12-20
16:04:15.347: E/AndroidRuntime(13344): at
java.lang.reflect.Method.invokeNative(Native Method) 12-20
16:04:15.347: E/AndroidRuntime(13344): at
java.lang.reflect.Method.invoke(Method.java:515) 12-20 16:04:15.347:
E/AndroidRuntime(13344): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-20 16:04:15.347: E/AndroidRuntime(13344): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 12-20
16:04:15.347: E/AndroidRuntime(13344): at
dalvik.system.NativeStart.main(Native Method)
这个错误是什么意思？我之前为其他 Listviews 使用过 AsyncTask 并且没有错误。也许是因为我更换了布局？
文件 detail_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1"
>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="2"
android:orientation="vertical" >
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#192832">
<com.brightcove.player.view.BrightcoveVideoView
android:id="@+id/bc_player"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:background="#000000" >
</com.brightcove.player.view.BrightcoveVideoView>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#193222">
<TabHost
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0" />
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</LinearLayout>
</TabHost>
</LinearLayout>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:orientation="vertical">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/List_Episode"
android:layout_marginTop="2dp"
android:listSelector="@drawable/list_selector">
</ListView>
</LinearLayout>
</LinearLayout>
最佳答案
尝试在 onPostExecute 方法开始时关闭进度对话框。
@Override
protected void onPostExecute(List<Map<String, Object>> result) {
super.onPostExecute(result);
if (Loading.isShowing()){
Loading.dismiss();
}
..........//your code
.................}
关于java - AsyncTask 调用 Progress Dialog.dismiss 方法时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20700531/