problem about android-lifecycle-Collection of common programming errors
curioustechizen
java android ddms android-lifecycle
Now, I am aware that there is no such thing as “exiting” an app in Android. By this I mean that the process corresponding to an app is kept in memory even after all the activities in that app are destroyed. (For sake of simplicity, let’s keep services and such out of the picture). The process is only killed when the system decides to do so in order to reclaim memory.However, once all my activities have been destroyed, I would assume that the process corresponding to my app is no longer “active”.
erik
android android-lifecycle
I have two application that work together on a tablet. Im noticing that if the user backs out of one application and the next time the app is opened oncreate is called, but if they hit home and then go back oncreate is not called.. I have also notice that onPause, onStop, onResume are NEVER being called.. I need to some how make sure that the app finishes if the user hits home..@Overrideprotected void onPause () {super.onPause();Toast.makeText(this, “Pause MED”, Toast.LENGTH_SHORT).show();fini
Sachin Chavan
android android-tabhost android-lifecycle
Application has a tabhost managed through TabActivity. It has option to add tabs at runtime.Say 5 tabs are added in runtime and different activities are shown.When I rotate the screen the activity undergoes the cycle o destroy and create. I want to maintain the tabs added by user in runtime to be available during this cycle.
Jeff Axelrod
android oop inheritance super android-lifecycle
In the Activity class, Android provides runtime enforcement that super() must be called for overridden lifecycle callback methods. If you forget do do so, it throws SuperNotCalledException.Exactly how was this implemented specifically on Android? Please point me to the actual source implementation if possible.
Julius B.
android android-lifecycle
I am extending Application class to work with some global variables that need context. I know there is onCreate() method in the Application class that gets called before any other onCreate() in activities, but I would like to know if there is onDestroy() or similar method in the Application class that could be overridden so that I would be able to store variables in persistent memory, unregister listener and send last message to server before app process gets killed? If not, is there any other w
NeTeInStEiN
android activity android-lifecycle
I’m having a very boring problem. When my app goes to background, sometimes the process is killed as the LogCat shows:INFO/ActivityManager(187): Low Memory: No more background processes. INFO/ActivityManager(187): Process com.app.myapp (pid 20681) has died. INFO/WindowManager(187): WIN DEATH: Window{40592708 com.app.myapp/app.myapp.dashboard.Dashboard paused=false} ERROR/InputDispatcher(187): channel ‘408b1d40 app.myapp/app.myapp.menus.products.Promotions (server)’ ~ Consumer closed input channe
GLee
android android-lifecycle
I have a case where I have two clickable items in a fragment. Item A detaches the current fragment from the current activity, and attaches a new fragment. Item B causes some UI updates. My problem is, if I click on both of them in quick succession, the app crashes. I get a NullPointerException in the UI updates because apparently the fragment has already been detached from item A. A more visual representation of the log:Click item B Click item A shortly thereafter Item A causes the current
Teovald
android android-fragments android-lifecycle
I am creating & attaching a fragment in my activity onCreate method :FragmentManager fragmentManager = getSupportFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); mSlateFragment = new SlateFragment(); fragmentTransaction.add(R.id.root, mSlateFragment); fragmentTransaction.commit();After that, I also setup my seekbars to their default values, to do this, I have to access the mSlateFragment object that has just been created :mSlateFragment.mSlate.
mahela007
android android-lifecycle static-variables
I’m writing a simple android application which is basically a modification of the fragments demo available in the android documentation. In the app, there is a file called Ipsum.java which has a static ArrayList of Strings called Headlines. In the onCreate() method of the main activity, I have the following code which adds some elements into the array list. if (savedInstanceState == null){Ipsum.Headlines.add(“String 1 “);Ipsum.Headlines.add(“String 2”);}savedInstanceState is a Bundle that the s
Jonathan Sampson
android android-lifecycle
I have a project for HoneyComb and I get an error after use recreate() method at onResum() method in my main Activity.11-10 22:05:42.090: E/ActivityThread(1917): Performing pause of activity that is not resumed: {com.blogspot.honeyapp/com.blogspot.honeyapp.Main} 11-10 22:05:42.090: E/ActivityThread(1917): java.lang.RuntimeException: Performing pause of activity that is not resumed: {com.blogspot.honeyapp/com.blogspot.honeyapp.Main} 11-10 22:05:42.090: E/ActivityThread(1917): at android.a
Daniel L.
android android-activity android-lifecycle
I have an Android application which is composed from a single Activity. How can I assure that only one instance of my application (== Activity) will exist in a given time? I got to a situation in which I succeeded to open multiple instances of my app by clicking on the app icon multiple times (this doesn’t reproduce all the time).
Joshua Valentine
android android-activity android-lifecycle
I have a question and would really appreciate any help.My friend says the app crashes onshake. My first app is a simple magic 8 ball app, that gives a random answer when the user shakes it. She says after she opens the app, and shakes the app instead of receiving a random answer like I do on my nexus 4, the app simply shutsdown and takes her back to her home screen.Here’s the code that I think may be causing it. I added the “Finish(); to shut down the activity after a user hits the homescreen, s
Dray
android activity android-activity lifecycle android-lifecycle
I have 3 activities, then I navigate from A to B and from B to C. The stack are C-B-A (with C on the top). The C Activity have a Runnable that works every interval, and connect to a web service that update the UI. If the Activity C comes to background, is destroyed and then comes to foreground again the task starts with de main Activity A. I want to come back to the C activity. Is possible? In the emulator works fine but in my smartphone with only this application running, always destory the ent
user190758
android android-activity android-lifecycle
Is it possible to differentiate between the following:A. Activity is being re-created after having been destroyed by the OS. For instance, if the device has “Don’t keep activities” enabled and the user sends my app to the background then brings it to the foreground again.B. Activity is being re-created after an app crash.
jakeliquorblues
android android-fragments android-service android-lifecycle android-dialogfragment
I have an activity that binds to a service.protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// Start the service.Intent gameServiceIntent = new Intent(this, GameService.class);startService(gameServiceIntent);bindService(gameServiceIntent, mConnection, Context.BIND_AUTO_CREATE);… Once the connection is established, the service is assigned to a member variable and creates a new table:private ServiceConnection mConnection = new ServiceConnection() {public voi
Magakahn
android android-lifecycle standby
I got an Activity class that uses two other classes; one of them extending ImageView and one that extends BaseAdapter like so:My ImageView class does some progresses when it is called and when I am starting it for the first time it does what I want it to. This is also the case if I press home button and then resumes. But for some reason it does not work if I resume from standby mode. (pressing the button on the phone that makes the screen dark) When I unlock the phone it crashes. It crashes on a
Tar_Tw45
android-fragments android-viewpager android-fragmentactivity android-lifecycle
I’m super new to Android Development. This is my first project which I have 4 days of experience so far. A lot of things is quite different but seems (to be honest) more fun to work with than iOS development until I ran into this issue.I got an activity that is hosts a viewPager, this viewPager loads with several fragments. Load fragments, navigate or pop another activity. Following is the current codepublic class MenuWithPager extend FragmentActivity {private ViewPager mViewPager;private ArrayL
Bob Smith
android crash android-activity android-mediaplayer android-lifecycle
The program works fine when I delete out the onResume() method but when I leave it in the program starts normally with the music playing yet nothing is displayed on my screen, and then when I try exiting out it freezes and takes a minute for the phone to come out of being frozen. What is wrong with this onResume() method? Do you need to see all of my code? Why would this happen?@Override protected void onResume() {// TODO Auto-generated method stubsuper.onResume();int spot = settings.getInt(“poi
MaKo
android crash android-lifecycle
I have an app that crashes if i press the home button, back button goes fine to the dashboard, but if I press home it crashes with:07-02 16:50:51.834: E/AndroidRuntime(343): java.lang.RuntimeException:Unable to pause activity{com.rt.paging/com.rt.paging.MKpagerActivity}:java.lang.NullPointerExceptionthis is my codepublic class MKpagerActivity extends FragmentActivity {private PagerAdapter mPagerAdapter;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedIns
mmBs
android listview android-lifecycle baseadapter
My app runs fine besides when the user stops using their phone long enough for the screen to lock, when they unlock it the app crashes and im a bit clueless as to why. Here is the error: here is the lazy adapter:package com.buhz.helpers;import java.util.ArrayList; import java.util.HashMap;import android.app.Activity; import android.content.Context; import android.content.Intent; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.O
Way of hope
android android-lifecycle android-application
In my android application I subclass the Application class and start a service. The service has a thread which is responsible to monitor idle time, and if the application remains idle more than 1 min the service tells my application about it, and the application lock downs user session.Here is the code, even though I am not sending any broadcast I am facing this issue..public class MainApp extends Application {public void onCreate(){Log.i(“Sharp:MainApp”, “Application – OnCreate”);super.onCreate
LiamJPeters
android android-listview android-arrayadapter android-lifecycle android-logcat
ProblemI’m making a simple app that retrieves a data set from a webserver in JSON form, parses it into objects contained in an ArrayList. This array list is then output in the form of a list view. It work’s beautifully to start with. Then when I leave the app for a while and come back to it, I get a ANR and have to Force close. However simply leaving the app and returning to it is completely fine. (See full LogCat below) I have included all the relevant code (with my webserver url removed) below
Raf
android bluetooth android-lifecycle
I’m pretty new to Android development. I’m currently trying to write a simple Android App to send a string to a server written in Python. The codes are mostly from this site: Example as well as the Android Developer site as reference. Note that I have chosen this example so that I can mainly play with the Bluetooth API in a single activity before adding more to it. I found BluetoothChat example is a little bit overwhelming for me as a start.Whenever the App is run without having the Bluetooth en
user842539
android android-fragments android-lifecycle android-support-library
I’m having a very strange problem with my app, which consists of an Activity and 2 Fragments (android.support.v4.app.Fragment).The problem is when I rotate my tablet : the app crashes right away.A few days before, everything was working fine, but I had to change packages name, that threw a few errors but I manage to correct them. Problem appeared right after that, but I just can’t find where is the error. Here is the Logcat I get right after the app is destroyed, restarted, resumed and created :
kiruwka
android android-service android-lifecycle android-memory
I have service bound to app context, this service runs in a separate process (lets say #service_process). I simulate app crash by throwing uncaught exception and app’s main process(#main_proccess) stops, obviously killing and GCing components, including main app context. Service is also unbound(disconnected) and destroyed(I have Service#onDestroy() called).However, the #service_process remains alive, according to $ adb shell ps | grep com.my_app even after #main process is dead.Can anyone explai
passy
android activity state android-lifecycle
I came across an odd crash during unmarshalling a parcel in onCreate and was even more confused by the way I fixed it.My app saves a TrackEntity object like this:@Override protected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);outState.putParcelable(STATE_TRACK, mTrack); }And loads it accordingly with:@Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);if (savedInstanceState != null) {mTrack = savedInstanceState.getPa
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