blocks|key|2744870|text|有两个选项可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2744871|当第一个Activity被取消时，您可以停止对话框，然后在第二个Activity上的onCreate方法中再次显示它。正如AkashG在评论中提到的那样。|ordered-list-item|offset|length|style|CODE|2744872|如果您真的希望在过渡到第二个Activity期间显示对话框，可以使用一个Activity而不是两个，并将该Activity的布局更改为使用第二个Activity的布局，而不是调用另一个Activity。但是，这可能很复杂，因为您将将两个Activities的特性实现为一个。|2744873|2744874|2744875|entityMap^0|0|4|8|W|8|16|8|0|E|8|10|8|1H|8|20|8|2K|8|3A|A|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@$E|Q|F|R|G|H]|$E|S|F|T|G|H]|$E|U|F|V|G|H]]|9|@]|A|$]]|$1|I|3|J|5|D|7|W|8|@$E|X|F|Y|G|H]|$E|Z|F|10|G|H]|$E|11|F|12|G|H]|$E|13|F|14|G|H]|$E|15|F|16|G|H]|$E|17|F|18|G|H]]|9|@]|A|$]]|$1|K|3|-4|5|6|7|19|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|N|$]]

There are two options you can use:

<ol>
<li>You can stop the dialog when the first <code>Activity</code> is dismissed and then show it again in the <code>onCreate</code> method on your second <code>Activity</code>. As AkashG mentioned in the comments.</li>
<li>If you really want the dialog to be shown during the transition to the second <code>Activity</code>, you can use one single <code>Activity</code> instead of two and change the layout of that <code>Activity</code> to use the layout of the second <code>Activity</code> instead of calling another <code>Activity</code>. However, this can be complicated since you will implement the features of your two <code>Activities</code> into a single one.</li>
</ol>

blocks|key|2744908|text|这是第二次活动中onCreate上的答案显示对话框的唯一解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2744909|正如您所说-进度对话框在第二个活动开始时消失，一个空白屏幕出现，直到子列表不存在fetch.the解决方案时，当列表中的数据被完全设置后，我的意思是在设置列表适配器之后，您可以取消对话框，并且它不会显示空白屏幕。|2744910|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This is the only solution to your answer-show dialog on onCreate on second activity

As you said - progress dialog disappear as the second activity start and a blank screen appears until the sub list does not fetch.the solution can be as dismiss the dialog when the data in list sets completely i mean after setting adapter to the list you can dismiss dialog and it wont show blank screen.

blocks|key|2744928|text|在您的情况下，我更愿意使用片段(如果需要，可以使用支持库)。然后将这两个活动更改为片段，并在(父)活动上创建showProgressDialog和hideProgressDialog方法。进度对话框总是可见的，因为它在同一个活动中，但是片段将具有完全分离的逻辑，与活动相同。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2744929|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I would rather use fragments in your case (with support library if needed).
Then you change this two activities to fragments and create showProgressDialog and hideProgressDialog methods on (parent) activity.
Progress dialog will be always visible, because it's in the same activity, but fragments will have completly separated logic, same as activity.

blocks|key|2744948|text|你应该使用AsyncTask|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2744949|class+FetchTask+extends+AsyncTask<Object,+Object,+Object>
{
++++ProgressDialog+progress;

++++@Override
++++protected+void+onPreExecute()+
++++{
+++++++++super.onPreExecute();
+++++++++progress=ProgressDialog.show(Context,+"",+"Loading...");
++++}

++++@Override
++++protected+Object+doInBackground(Object...+params)+
++++{

++++++++//+fetch+your+data+here+

+++++++++return+null;
++++}

++++@Override
++++protected+void+onPostExecute(Object+result)+
++++{
++++++++super.onPostExecute(result);
++++++++progress.dismiss();
++++}
}|code-block|syntax|javascript|2744950|然后，您可以在onCreate中执行以下任务：|offset|length|style|CODE|2744951|new+FetchTask().execute();|2744952|entityMap^0|0|0|7|8|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You shoud use AsyncTask 

<pre><code>class FetchTask extends AsyncTask&lt;Object, Object, Object&gt;
{
 ProgressDialog progress;

 @Override
 protected void onPreExecute() 
 {
 super.onPreExecute();
 progress=ProgressDialog.show(Context, "", "Loading...");
 }

 @Override
 protected Object doInBackground(Object... params) 
 {

 // fetch your data here 

 return null;
 }

 @Override
 protected void onPostExecute(Object result) 
 {
 super.onPostExecute(result);
 progress.dismiss();
 }
}
</code></pre>

Then you can execute this task in your <code>onCreate</code> as

<pre><code>new FetchTask().execute();
</code></pre>

blocks|key|3625737|text|这是一个黑客：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3625738|在ActivityA.java中，ProgressDialog+pd声明为静态|3625739|public+static+ProgressDialog+pd;|code-block|syntax|javascript|3625740|在ActivityB.java中，使用对ActivityA.pd的静态引用，然后使用以下代码。|offset|length|style|CODE|3625741|if+(ActivityA.pd+!=+null)+{
++++++++++++if+(ActivityA.pd.isShowing())+{
++++++++++++++++ActivityA.pd.dismiss();
++++++++++++}
++++++++++++else+{
++++++++++++++++Log.e(Vars.TAG,+"It+is+NOT+SHOWING");
++++++++++++}
++++++++}|3625742|entityMap^0|0|0|0|K|C|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

This is a hack:

In ActivityA.java declare the ProgressDialog pd as static

<pre><code>public static ProgressDialog pd;
</code></pre>

In ActivityB.java use the static reference to <code>ActivityA.pd</code> and then use the below code.

<pre><code>if (ActivityA.pd != null) {
 if (ActivityA.pd.isShowing()) {
 ActivityA.pd.dismiss();
 }
 else {
 Log.e(Vars.TAG, "It is NOT SHOWING");
 }
 }
</code></pre>

blocks|key|2745025|text|如果你把它作为2项活动进行。最好的方法是在第二个活动开始后立即将进度对话框作为well.Because在您的第二个活动中进行，第一个活动进入background.You时不能期望第一个活动的进度对话框仍然可见，因为它已经转移到back.Best中，即在第二个活动中有一个进度对话框，并显示您试图检索子列表时的进度对话框。在填充子列表UI之后，关闭进度对话框。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2745026|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are having it as 2 activities. Best way will be to have the progress dialog in your second activity as well.Because as soon as your second activity starts, the first activity goes to the background.You cannot expect the progress dialog of the first activity to be still visible as it has moved to back.Best way is to have a progress dialog in your second activity and show when you are trying to retrieve your sublist. dismiss the progress dialog after getting the sublist UI populated.

In my android application, first activity calls REST API to get the list of items using credentials. Now on clicking on any item, item id is passed and second activity is called using intent. This second activity calls the REST API using passing id and shows the list of sub items for that id.

I am using Progress Dialog in first activity. This is working fine. I want this progress dialog also continue in the second activity until sub item list does not display.

Presently progress dialog disappear as the second activity start and a blank screen appears until the sub list does not fetch.

Can anybody guide me how can I continue progress dialog in second activity and dismiss when sub list appears.

How to show progress dialog in two activity when switch from one activity to Another

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在我的android应用程序中，第一个活动调用REST来获取使用凭据的项目列表。现在，在单击任何项时，项目id将被传递，第二个活动将使用意向调用。第二个活动使用传递的id调用REST，并显示该id的子项列表。我在第一次活动中使用进度对话框。这很好用。我希望这个进度对话框也继续在第二个活动，直到子项列表不显示。当前，进度...

问切换到另一个活动时如何在两个活动中显示进度对话框
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