Defect 6223 created. On Jan 23, 5:28 pm, Zsolt Vasvari <[email protected]> wrote: > I know it's rude to reply to myself, but I create a very simple demo > of this problem. This seems to effect Spinners, but not TextViews. > > I am not sure how to upload the .apk, but just e-mail me for it. > > I tested this on Nexus One. Basically, if you just change > orientation, it's working fine, but if you change it to landscape then > back to portrait before the Activity had a chance to be restarted, the > Spinner loses its saved state. I will be creating a bug report for > this. > > package com.test.spinnerconfig; > > import android.app.Activity; > import android.os.Bundle; > import android.widget.AbsSpinner; > import android.widget.ArrayAdapter; > import android.widget.SpinnerAdapter; > > public class SpinnerConfigTest extends Activity > { > @Override > public void onCreate(Bundle savedInstanceState) > { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > > AbsSpinner spinner = (AbsSpinner)findViewById(R.id.spinner); > > CharSequence[] items = { "1", "2", "3" }; > SpinnerAdapter adapter = new ArrayAdapter<CharSequence>(this, > android.R.layout.simple_spinner_item, android.R.id.text1, items); > spinner.setAdapter(adapter); > > if (savedInstanceState == null) > // Set it to "2", we would expect it to stay that way > spinner.setSelection(1); > > // This should take a little while > for (int i = 0; i < 1000000; i++) ; > } > > } > > <?xml version="1.0" encoding="utf-8"?> > <merge xmlns:android="http://schemas.android.com/apk/res/android";> > <Spinner android:id="@+id/spinner" android:layout_width="wrap_content" > android:layout_height="wrap_content"/> > </merge> > > On Jan 23, 6:56 am, Zsolt Vasvari <[email protected]> wrote: > > > > > On the emulator, once in a while (1 in 10 times maybe), you get two > > onCreate's fired on screen rotation. The 2nd one has no proper saved > > instance data. This is not an issue, since it's just the emulator. > > > Testing on Nexus One: During normal orientation change, I cannot > > cause two onCreate events in a row like in the emulator. > > > BUT, if I very quickly flip the phone between landscape/portrait, the > > system seems to get confused and calls onCreate() without its saved > > instance data, just like on the emulator does. When I say "without > > saved instance data", I don't mean that the Bundle is NULL, but > > instead that it's empty or incomplete -- haven't investigated it to > > that level of detail yet. > > > While flipping the phone that quickly is not a completely normal usage > > scenario, it can happen quite easily if you use the phone laying on > > your side. I think this is a very serious (race condition) problem > > that can lead to potential data corruption in every application. > > > On Jan 5, 2:24 am, Business Talk <[email protected]> wrote: > > > > It's not just 1.6. the higher versions do the same. It looks like > > > rotation does more than just updetes the UI. I also failed to find any > > > reference to this problem. > > > > On Jan 4, 8:16 am, Pawel Kapala <[email protected]> wrote: > > > > > Hello. > > > > > With following simple code (on clean, new android project): > > > > > public class RotationTest extends Activity { > > > > > private static final String LOGTAG = "RotationTest"; > > > > > @Override > > > > public voidonCreate(Bundle savedInstanceState) { > > > > super.onCreate(savedInstanceState); > > > > setContentView(R.layout.main); > > > > Log.d(LOGTAG, "onCreate():"); > > > > } > > > > > @Override > > > > protected void onDestroy() { > > > > super.onDestroy(); > > > > Log.d(LOGTAG, "onDestroy():"); > > > > } > > > > > } > > > > > theonCreate/onDestroy pair is called twice when rotating from > > > > landscape -> portrait on Android 1.6 emulator. > > > > > Here is the snippet of LogCat (doing rotation to landscape and back to > > > > portrait): > > > > 01-04 14:05:35.895: DEBUG/RotationTest(704):onCreate(): > > > > 01-04 14:13:53.514: DEBUG/RotationTest(704): onDestroy(): > > > > 01-04 14:13:53.916: DEBUG/RotationTest(704):onCreate(): > > > > 01-04 14:14:02.035: DEBUG/RotationTest(704): onDestroy(): > > > > 01-04 14:14:02.604: DEBUG/RotationTest(704):onCreate(): > > > > 01-04 14:14:02.716: DEBUG/RotationTest(704): onDestroy(): > > > > 01-04 14:14:03.015: DEBUG/RotationTest(704):onCreate(): > > > > > On the other hand, when running the application on the G1 phone, the > > > > problem does not occur, when the keyboard is slid (then the rotation > > > > changes). > > > > > I've tried to find an open issue or a similar thread but I am yet > > > > unsuccessful. > > > > > Could anyone give a pointer or a description of this behavior? > > > > > Has anyone experienced it on Eclair or later(!) ?- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text -- Hide quoted text - > > - Show quoted text -
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