StackOverflow2013

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POHow can I show a Progress dialog between two activities?
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copied!<p>I have a problem. I need to go from one activity to another. My second activity has a big xml layout, with a lot of elements (I'm speaking about four hundred aprox.), then it takes a few seconds (too much) to show this second Activity.</p> <p>How can I show a Progress dialog between two activities?</p> <p>I'm trying to use a background task to do this.</p> <p>I have this method in my Activity A:</p> <pre><code> private void goToYear() { Intent intent = new Intent(); intent.setClass (getBaseContext(), YearActivity.class); startActivity( intent); } </code></pre> <p>And in my Activity B:</p> <pre><code>public class YearActivity extends Activity { private String TAG = "YearActivity ::"; private ProgressDialog pd = null; @Override public void onCreate( Bundle savedInstanceState) { super.onCreate( savedInstanceState); // Show the ProgressDialog on this thread this.pd = ProgressDialog.show(this, "Working...", "Calculating the screen...", true, false); // Start a new thread that will download all the data new MakeYearTask().execute(); } private void initCalendar () { this.setContentView( R.layout.calendar_year); ... ... initialize values ... ... } private class MakeYearTask extends AsyncTask<String, Void, Object> { protected Void doInBackground(String... args) { Log.i("YearActivity::MakeYearTask", "MakeYearTask Background thread starting"); YearActivity.this.initCalendar(); } protected void onPostExecute(Object result) { if (YearActivity.this.pd != null) { YearActivity.this.pd.dismiss(); } } } } </code></pre> <p>You can see that I make the <code>setContentView</code> out of the <code>onCreate</code> method.</p> <p>This doesn't work. It gives me one exception, like this:</p> <pre><code>12-09 19:49:17.729: ERROR/AndroidRuntime(218): java.lang.RuntimeException: An error occured while executing doInBackground() 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.os.AsyncTask$3.done(AsyncTask.java:200) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.FutureTask.run(FutureTask.java:122) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.lang.Thread.run(Thread.java:1060) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): Caused by: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.view.ViewRoot.checkThread(ViewRoot.java:2629) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.view.ViewRoot.requestLayout(ViewRoot.java:545) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.view.View.requestLayout(View.java:7657) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.view.ViewGroup.addView(ViewGroup.java:1749) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.view.ViewGroup.addView(ViewGroup.java:1731) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at com.android.internal.policy.impl.PhoneWindow.generateLayout(PhoneWindow.java:2186) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at com.android.internal.policy.impl.PhoneWindow.installDecor(PhoneWindow.java:2239) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:309) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.app.Activity.setContentView(Activity.java:1620) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at es.jota.app.YearActivity.initCalendar(YearActivity.java:42) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at es.jota.app.YearActivity.access$0(YearActivity.java:41) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at es.jota.app.YearActivity.initCalendar$MakeYearTask.doInBackground(YearActivity.java:120) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at es.jota.app.YearActivity.initCalendar$MakeYearTask.doInBackground(YearActivity.java:1) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at android.os.AsyncTask$2.call(AsyncTask.java:185) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256) 12-09 19:49:17.729: ERROR/AndroidRuntime(218): ... 4 more </code></pre>

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