## startActivity ##
Start an activity, like you would start an application: for instance: you have an app with a home-screen and a user-info screen: if you press the user-info button, you start the user-info activity with this.

## startActivityForResult ##
Start an activity and expect something in return. For instance, on your user-info screen, you can upload a profile picture. You start the gallery-activity with the explicit goal to get a URI back with the preferred picture. You start this activity literaly to obtain a result (the picture. There are some techinical ways to make sure you actually get the result, but they are quite clear in the manual.

**startActivity** will start a new activity and not care when where and how that activity finishes.

evidently

**startActivityForResult** waits for callbacks when the started activity decided to finish


 **startActivity()** will start the activity you want to start without worrying about getting any result from new child activity started by startActivity to parent activity.

 **startActivityForResult()** starts another activity from your activity and it expect to get some data from newly started child activity  by startAcitvityForResult()  and return that to parent activity.


Check this link - [`Activity#startActivityForResult(Intent, int)`][1]


  [1]: http://developer.android.com/reference/android/app/Activity.html#startActivityForResult%28android.content.Intent,%20int%29

I have an IPA signed for ad-hoc distribution. I can install it fine with Xcode Organizer by dragging it to the device. It also worked with iTunes &lt;=10 by dragging onto the device name.
I&#39;d like to install it via iTunes 11 though. Dragging it onto the device name, or the app section does not work. Any idea how to do it now?

Install IPA with iTunes 11

Purely out of curiosity, is there a more elegant way to simply get the substring after the first `=` symbol in a string? The following works to give back `name=bob`:

    string = &quot;option=name=bob&quot;
    string[string.index(&#39;=&#39;)+1..-1]

It just doesn&#39;t feel very Ruby. This also works:

    string.split(&#39;=&#39;, 2)[1]

Again, not very elegant especially since `split` is doing extra unnecessary work. Are regular expressions the answer? I felt this was a little overkill for the simplicity of finding a single character position in a string:

    string.match(&#39;=(.*)&#39;)[1]

I have to imagine this is an extremely common situation, isn&#39;t there a `string.after(&#39;=&#39;)` type method? Does Ruby on Rails provide something like this given the frequency this kind of operation is used over the web?

***UPDATE***: Forgot to mention the situation when the symbol is not found, `nil` or empty string should be returned. But the regular expression mechanism and `.index` method require an extra check for that (so less elegant).

Get substring after the first = symbol in Ruby

What is the difference between `startActivityForResult()` and `startActivity()`  ? 

When, and for what, should I use each one ?


Difference between startActivityForResult() and startActivity()?

<p>What is the difference between <code>startActivityForResult()</code> and <code>startActivity()</code>  ?</p>
<p>When, and for what, should I use each one ?</p>


I am trying to a make custom `InfoWindow` after a click on a marker with the new Google Maps API v2. I want it to look like in the original maps application by Google. Like this:

![Example Image][1]

When I have `ImageButton` inside, its not working - the entire `InfoWindow` is slected and not just the `ImageButton`. I read that it is because there isn&#39;t a `View` itself but it&#39;s snapshot, so individual items cannot be distinguished from each other. 

**EDIT:** 
In the [documentation][2] (thanks to [Disco S2][3]):

&gt; As mentioned in the previous section on info windows, an info window
&gt; is not a live View, rather the view is rendered as an image onto the
&gt; map. As a result, any listeners you set on the view are disregarded
&gt; and you cannot distinguish between click events on various parts of
&gt; the view. You are advised not to place interactive components — such
&gt; as buttons, checkboxes, or text inputs — within your custom info
&gt; window.

But if Google use it, there must be some way to make it. Does anyone have any idea?


  [1]: http://i.stack.imgur.com/NVKQk.png
  [2]: https://developers.google.com/maps/documentation/android-api/infowindows#info_window_events
  [3]: https://stackoverflow.com/a/13857787/956975

Google Maps Android API v2 - Interactive InfoWindow (like in original android google maps)

The new Android Billing v3 documentation and helper code uses `startIntentSenderForResult()` when launching a purchase flow. I want to start a purchase flow (and receive the result) from a `Fragment`.

For example the [documentation][1] suggests calling

    startIntentSenderForResult(pendingIntent.getIntentSender(),
        1001, new Intent(), Integer.valueOf(0), Integer.valueOf(0),
        Integer.valueOf(0));

and the [helper code][2] calls

    mHelper.launchPurchaseFlow(this, SKU_GAS, 10001,   
        mPurchaseFinishedListener, &quot;bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ&quot;);

which calls `startIntentSenderForResult()`.

The problem is, calling `startIntentSenderForResult()` causes `onActivityResult()` to be called on the parent `Activity` rather than on the `Fragment` that it was called from (where the `IabHelper` resides).

I could receive the `onActivityResult()` in the parent `Activity` and then manually call the `onActivityResult()` on the `Fragment`, but is there a way to make a call to `startIntentSenderForResult()` from a `Fragment` that returns the result directly to that `Fragment`&#39;s `onActivityResult()`?

  [1]: http://developer.android.com/google/play/billing/billing_integrate.html#billing-requests
  [2]: http://developer.android.com/training/in-app-billing/purchase-iab-products.html#Purchase

Calling startIntentSenderForResult from Fragment (Android Billing v3)

My app seems ready to get a &#39;real life&#39; test for an in-app purchase procedure on my device. However, I receive an &quot;The publisher cannot purchase this item&quot; error message in Play Store.
Now, how am I supposed to test this? I don&#39;t want to lose my phone&#39;s configuration by reinstalling it with a dummy account just for testing. 
In the Developer Console under &quot;Settings&quot;-&quot;License testing&quot;, I have added my email address under &quot;GMail accounts with testing access&quot;, but this doesn&#39;t change anything... maybe I missed some simple way, but right now it feels very confusing!


Testing in-app billing: &quot;The publisher cannot purchase this item&quot;

If the text of a `Spinner` item is too long to fit into a single line, the text is not wrapped but cut off. This is *only* the case for **API level &gt;= 11**. Here are screenshots of Android **4.2.2** (left) which shows the wrong behavior and Android **2.3.3** (right) where it looks as expected.

&lt;img src=&quot;http://i.stack.imgur.com/Marym.png&quot; width=&quot;320&quot; /&gt; 
&lt;img src=&quot;http://i.stack.imgur.com/xsXtn.png&quot; width=&quot;320&quot; /&gt; 

`android:singleLine=&quot;false&quot;` simply gets ignored here. So as all other tries like `android:lines`, `android:minLines`, etc. The `TextView` somehow seems to be much wider than the window width. 

I saw other people having the same problem, but no one could find a solution. So, is this a system bug? I don&#39;t think this inconsistency between the OS versions can be intended.

---

###Please note:###
There were some answers suggesting relatively simple solutions.

 - Writing a custom `Adapter` and overriding `getView()` as well as `getDropDownView()`. This is not the solution here, because at this point, there is still the original problem: How does the layout have to look like to handle proper line wrapping?

 - Wrapping the `TextView` of the drop down view into a parent `ViewGroup`. Does not work with `android:layout_width=&quot;match_parent&quot;` because the width of the parent strangely seems to be unlimited.

 - Giving the drop down view a fixed width. This is not suitable with the different widths the `Spinner` can have.

 - And of course, no solution is to manually insert `\n`s anywhere into the text.

---

###Reproduce with the following code:###

**UPDATE:** I also uploaded this as a sample project on [GitHub][1]: [Download][2]

/res/values/arrays.xml:

    &lt;string-array name=&quot;items&quot;&gt;
        &lt;item&gt;Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt.&lt;/item&gt;
        &lt;item&gt;At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est.&lt;/item&gt;
    &lt;/string-array&gt;

/res/layout/spinner_item.xml:

	&lt;TextView xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
	    android:id=&quot;@android:id/text1&quot;
	    style=&quot;?android:attr/spinnerDropDownItemStyle&quot;
	    android:layout_width=&quot;match_parent&quot;
	    android:layout_height=&quot;wrap_content&quot;
	    android:ellipsize=&quot;none&quot;
	    android:minHeight=&quot;?android:attr/listPreferredItemHeight&quot;
	    android:singleLine=&quot;false&quot; /&gt;

Set `Adapter`:

    spinner.setAdapter(ArrayAdapter.createFromResource(this,
                R.array.items,
                R.layout.spinner_item));


  [1]: https://github.com/robbers/SpinnerBug
  [2]: https://github.com/robbers/SpinnerBug/archive/master.zip

Spinner does not wrap text -- is this an Android bug?

I am in charge of developing a website which should be able to show statistics from both Apple&#39;s app store and Google Play Store to clients, so they can easily see what&#39;s going on.

I have figured out some ways to get App Store&#39;s data, but the Google Play Developers statistics seem way harder to get.

I&#39;ve heard of scraping, but this wouldn&#39;t be a great solution, as it would probably get broken whenever the developers console gets a major update.

I&#39;m looking for something which would work like Andlytics or App Annie do, as an example, so I could get data with AJAX or something else (JSON format maybe?) and put it into a database.

For now, I haven&#39;t found any reliable solution (besides scraping, which seems like a unstable way to go), and this question has been asked a while ago, so I allow myself to ask it again, because maybe now there are some solutions to get around this.

All I could find was Google Play APIs, which allow me to fetch data from the public page of the app, but not from developers console, with authentication.

Any hints or help will be greatly appreciated :)

Getting statistics from Google Play Developers with an API

I&#39;ve implemented my class with serializable, but it still didn&#39;t work.

This is my class:

    package com.ursabyte.thumbnail;

    import java.io.Serializable;

    import android.graphics.Bitmap;

    public class Thumbnail implements Serializable {

        private static final long serialVersionUID = 1L;
        private String label = &quot;&quot;;
        private Bitmap bitmap;

        public Thumbnail(String label, Bitmap bitmap) {
            this.label = label;
            this.bitmap = bitmap;
        }

        public void set_label(String label) {
            this.label = label;
        }

        public String get_label() {
            return this.label;
        }

        public void set_bitmap(Bitmap bitmap) {
            this.bitmap = bitmap;
        }

        public Bitmap get_bitmap(){
            return this.bitmap;
        }

        //  @Override
        //  public int compareTo(Thumbnail other) {
        //      if(this.label != null)
        //          return this.label.compareTo(other.get_label());
        //      else
        //          throw new IllegalArgumentException();
        //  }

    }

This is what I want to be passing.

    List&lt;Thumbnail&gt; all_thumbs = new ArrayList&lt;Thumbnail&gt;();
    all_thumbs.add(new Thumbnail(string, bitmap));
    Intent intent = new Intent(getApplicationContext(), SomeClass.class);
    intent.putExtra(&quot;value&quot;, all_thumbs);

But still it didn&#39;t work. I don&#39;t know how to use Parcelable, so I use this instead.


Passing data through intent using Serializable

Can somebody explain this to me please :

    Intent intent = new Intent(Context, AlarmReceiver.class);

I never understood and I seriously think I never will if somebody doesn&#39;t try to explain this to me in depth. This whole context thing is so confusing to me. Sometimes it works like this :

		

    Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);

Sometimes it wont work like that but it accepts only :

		Intent intent = new Intent(context, AlarmReceiver.class);

Sometimes its :

    Intent intent = new Intent(this, AlarmReceiver.class);

etc. etc. and many other.

I understand basics of context but how many are there? And why does eclipse throw me an error once and another time its fine? Why do we need to declare context sometimes? :

    Context context;

I&#39;m unable to find the right context for all situations how do I know what is the right one in every situation?

Android Intent Context Confusing

In my android application I&#39;m always using direct `putExtra()` function of `Intent` class to pass any number of value to new `Activity`.&lt;br/&gt;
Like this:

    Intent i = new Intent(this, MyActivity.class);
    i.putExtra(ID_EXTRA1, &quot;1&quot;);
    i.putExtra(ID_EXTRA2, &quot;111&quot;);
    startActivity(i);

I know about `Bundle` in Android and I have seen people are using `Bundle` for passing values to new `Activity`.&lt;br/&gt;
Like this:

    Intent intent = new Intent(this, MyActivity.class);
    Bundle extras = new Bundle();
    extras.putString(&quot;EXTRA_USERNAME&quot;,&quot;my_username&quot;);
    extras.putString(&quot;EXTRA_PASSWORD&quot;,&quot;my_password&quot;);
    intent.putExtras(extras);
    startActivity(intent);

Here I have 2 doubts.&lt;br/&gt;Why should I use `Bundle` if I can pass values to new `Activity` by putting it directly to `Intent`?&lt;br/&gt;
What are the advantages of using `Bundle` instead of direct `Intent` `putExtra()`?

Advantages of using Bundle instead of direct Intent putExtra() in Android

I&#39;m trying to use the new notifications interface. I&#39;ve added 3 buttons to the notifications, and I want to save something to my database once each of them is clicked.

The notification itself works well and is shown when called, I just don&#39;t know how to capture each of the three different button clicks.

I&#39;m using a `BroadcastReceiver` to catch the clicks, but I don&#39;t know how to tell which button was clicked.

This is the code of `AddAction`(I&#39;ve excluded the rest of the notification, as its working well) - 

		//Yes intent
		Intent yesReceive = new Intent();  
		yesReceive.setAction(CUSTOM_INTENT);
	    Bundle yesBundle = new Bundle();            
	    yesBundle.putInt(&quot;userAnswer&quot;, 1);//This is the value I want to pass
	    yesReceive.putExtras(yesBundle);
	    PendingIntent pendingIntentYes = PendingIntent.getBroadcast(this, 12345, yesReceive, PendingIntent.FLAG_UPDATE_CURRENT);
	    mBuilder.addAction(R.drawable.calendar_v, &quot;Yes&quot;, pendingIntentYes);
	    
		//Maybe intent
		Intent maybeReceive = new Intent();  
		maybeReceive.setAction(CUSTOM_INTENT);
	    Bundle maybeBundle = new Bundle();            
	    maybeBundle.putInt(&quot;userAnswer&quot;, 3);//This is the value I want to pass
	    maybeReceive.putExtras(maybeBundle);
	    PendingIntent pendingIntentMaybe = PendingIntent.getBroadcast(this, 12345, maybeReceive, PendingIntent.FLAG_UPDATE_CURRENT);
	    mBuilder.addAction(R.drawable.calendar_question, &quot;Partly&quot;, pendingIntentMaybe);
	    
	    //No intent
		Intent noReceive = new Intent();  
		noReceive.setAction(CUSTOM_INTENT);
	    Bundle noBundle = new Bundle();            
	    noBundle.putInt(&quot;userAnswer&quot;, 2);//This is the value I want to pass
	    noReceive.putExtras(noBundle);
	    PendingIntent pendingIntentNo = PendingIntent.getBroadcast(this, 12345, noReceive, PendingIntent.FLAG_UPDATE_CURRENT);
	    mBuilder.addAction(R.drawable.calendar_x, &quot;No&quot;, pendingIntentNo);

This is the code of the `BroadcastReceiver`- 

     public class AlarmReceiver extends BroadcastReceiver {

	@Override
	public void onReceive(Context context, Intent intent) {
		Log.v(&quot;shuffTest&quot;,&quot;I Arrived!!!!&quot;);
	     //Toast.makeText(context, &quot;Alarm worked!!&quot;, Toast.LENGTH_LONG).show();
	     
	    Bundle answerBundle = intent.getExtras();
	    int userAnswer = answerBundle.getInt(&quot;userAnswer&quot;);
	    if(userAnswer == 1)
	    {
	    	Log.v(&quot;shuffTest&quot;,&quot;Pressed YES&quot;);
	    }
	    else if(userAnswer == 2)
	    {
	    	Log.v(&quot;shuffTest&quot;,&quot;Pressed NO&quot;);
	    }
	    else if(userAnswer == 3)
	    {
	    	Log.v(&quot;shuffTest&quot;,&quot;Pressed MAYBE&quot;);
	    }

	}           
	}

I&#39;ve registered the `BroadcastReceiver` in the Manifest.
Also, I want to mention that the `BroadcastReceiver` is called when I click one of the buttons in the notification, but the intent always includes an extra of &#39;2&#39;.

This is the notifcation iteslf - 
![notification][1]


  [1]: http://i.stack.imgur.com/9B1gi.png

Determine addAction click for Android notifications

I&#39;m new to Android programming and I&#39;m having problems while passing an ArrayList of a Parcelable to a fragment.
This is the Activity that is launched(working well!) where **feedlist** is an ArrayList of a parcelable **Music**.

    Intent in = new Intent(context, ListMusicsActivity.class);
		
    in.putExtra(&quot;arrayMusic&quot;, feedList);
    activity.startActivity(in);

The fragment Activity onCreate() method:

    @Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activitymusiclist);
		
		if(savedInstanceState != null)
		{
			ListMusicFragment frag = new ListMusicFragment();
			frag.setArguments(getIntent().getExtras());
		}
	}

The Fragment code:
    
    public class ListMusicFragment extends SherlockFragment{

	private ArrayList&lt;Music&gt; listMusics = new ArrayList&lt;Music&gt;();
	private ListView listMusic;
	
	
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, 
        Bundle savedInstanceState)
	{
		listMusics = (ArrayList&lt;Music&gt;) getArguments().getSerializable(&quot;arrayMusic&quot;);
		View view = inflater.inflate(R.layout.musiclistview, container, false);
		listMusic = (ListView) view.findViewById(R.id.musicListView);
		listMusic.setAdapter(new MusicBaseAdapter(getActivity(), listMusics));
		
		return view;
	}
    }

I think the problem is in the line 

    listMusics = (ArrayList&lt;Music&gt;) getArguments().getSerializable(&quot;arrayMusic&quot;);

Finally this is my Music class:


    public class Music implements Parcelable{

	private String url;
	private String artist;
	private String title;
	private String duration;
	private String info_url;
	private String lyrics;
	
	
	public Music(String url, String artist, String title, 
        String duration, String lyrics, String info_url)
	{
		this.url = url;
		this.artist = artist;
		this.title = title;
		this.duration = duration;
		this.lyrics = lyrics;
		this.info_url = info_url;
	}
	
	public Music(Parcel in)
	{
		url = ParcelUtils.readString(in);
		artist = ParcelUtils.readString(in);
		title = ParcelUtils.readString(in);
		duration = ParcelUtils.readString(in);
		info_url = ParcelUtils.readString(in);
		lyrics = ParcelUtils.readString(in);
	}
	
	public String getUrl()
	{
		return url;
	}
	
	public String getArtist()
	{
		return artist;
	}
	
	public String getTitle()
	{
		return title;
	}
	
	public String getDuration()
	{
		return duration;
	}
	
	public String getLyrics()
	{
		return lyrics;
	}
	
	public String getInfo()
	{
		return info_url;
	}
	
	@Override
	public int describeContents() {
		return 0;
	}
	
	
	@Override
	public void writeToParcel(Parcel dest, int flags)
	{
		ParcelUtils.writeString(dest, url);
		ParcelUtils.writeString(dest, artist);
		ParcelUtils.writeString(dest, title);
		ParcelUtils.writeString(dest, duration);
		ParcelUtils.writeString(dest, lyrics);
		ParcelUtils.writeString(dest, info_url);
	}
	
	public static final Parcelable.Creator&lt;Music&gt; CREATOR = 
        new Parcelable.Creator&lt;Music&gt;() {
		
		public Music createFromParcel(Parcel in)
		{
			return new Music(in);
		}
		
		public Music[] newArray(int size)
		{
			return new Music[size];
		}
	};
    }

When I run this code the problem I get is a **java.lang.NullPointerException in the Fragment onCreateView() method**.
I would appreciate a lot if someone pointed me in the right direction to see where I am failing.


**EDIT**: Problem solved: I just needed to add this line to the fragment Activity onCreate() method(othwewise the getArguments() would return null):

    getSupportFragmentManager().beginTransaction()
        .add(android.R.id.content, frag).commit();

And add this to the fragment code:

    @Override
	    public void onActivityCreated(Bundle savedInstanceState)
	{
		super.onActivityCreated(savedInstanceState);
		
		Bundle bundle = getArguments();
		if(bundle != null)
		{
			listMusics = bundle.getParcelableArrayList(&quot;arrayMusic&quot;);
			listMusic.setAdapter(new MusicBaseAdapter(getActivity(), listMusics));
		}
	}

where, listMusics is an `ArrayList` of `Parcelable` Music.

Android: Pass data(extras) to a fragment

This question is mostly to solicit opinions on the best way to handle my app.  I have three fragments being handled by one activity.  Fragment A has one clickable element the photo and Fragment B has 4 clickable elements the buttons.  The other fragment just displays details when the photo is clicked.  I am using ActionBarSherlock.  

![Screen shot][1]

The forward and back buttons need to change the photo to the next or previous poses, respectively.  I could keep the photo and the buttons in the same fragment, but wanted to keep them separate in case I wanted to rearrange them in a tablet.  

I need some advice - should I combine Fragments A and B?  If not, I will need to figure out how to implement an interface for 3 clickable items.  

I considered using Roboguice, but I am already extending using SherlockFragmentActivity so that&#39;s a no go.  I saw mention of Otto, but I didn&#39;t see good tutorials on how to include in a project. What do you think best design practice should be?  

I also need help figuring out how to communicate between a fragment and an activity.  I&#39;d like to keep some data &quot;global&quot; in the application, like the pose id.  Is there some example code I can see besides the stock android developer&#39;s information?  That is not all that helpful.  

BTW, I&#39;m already storing all the information about each pose in a SQLite database.  That&#39;s the easy part.  

  


  [1]: http://i.stack.imgur.com/p1fre.png

Communicating between a fragment and an activity - best practices

I&#39;ve 2 activities, **Activity1** and **Activity2**.

In `Activity1` I&#39;ve a **Button** and **TextView**.
When the button is clicked **Activity2** is started.

In `Activity2` I&#39;ve an **EditText**.

I want to display the data retrieved from **EditText** in **Activity2** in the **TextView** in **Activity1** when back is pressed from **Activity2**.

can someone help me with the code to make this work?

How to pass data from 2nd activity to 1st activity when pressed back? - android

Hi I&#39;m wondering how Android is managing memory and I can&#39;t find precise answer anywhere.
Let&#39;s assume I have an application with 5 activities on current activity stack (4 are stopped and 1 is resumed), there is no service connected. I press HOME button so that all of my activities are stopped.
I start some other memory consuming application and overall device memory is starting to be low. And the question is 

... What will happen to my application?

1. Can system destroy only one or some of my activities to recover memory?
2. Will system kill the whole process of my application? Will all activities be nicely destroyed?
3. What will happen when I get back to my application when it was totally killed? Will it start from beggining (like the first start) or will it try to recover activities to previeous state / if yes - is it only the one on the top of the stack or all of them?

**UPDATE:**

Before asking this question I&#39;ve seen Activity lifecycle a few times but it doesn&#39;t have answers to my questions.
I made some tests and I have some answers. &quot;Stop process&quot; in DDMS was a clue for testing.

**I haven&#39;t tested answer for question 1, but as guide says:**

&gt; If an activity is paused or stopped, the system can drop the activity
&gt; from memory by either asking it to finish, or simply killing its
&gt; process.

It seems that one or more of the activities can be destroyed gently(with onDestroy method) without killing the process. You will simply get (onCreate + bundle) when getting back to them.

**Question 2 answer:**

YES. Generally system kills the whole process this means all data including activities and static fields are destroyed. This is NOT done nicely - you won&#39;t get onDestroy or finialize() for any of your paused/stopped activities. This is why saveInstanceState() is called just before onPause method. onPause is basically the last method where you should save something because after this method you could never see onStop or onDestroy. System can just kill the process destroying all of your objects whatever they hold and whatever they are doing.

**Question 3 answer:**

What will happen when you get back to a killed application?

 - Prior to Android 2.2 - application will start from the beggining, with launcher activity.
 - Starting from 2.2 - system will restore the previous application state. What does it mean? It means that last visible activity will be recreated (onCreate + bundle). What will happen with activity stack? Stack is fine but all activities on it are dead. Each of them will be recreated (onCreate + bundle) when you get back to it with back button.
There is one more thing about that:

&gt; Normally, the system clears a task (removes all activities from the
&gt; stack above the root activity) in certain situations when the user
&gt; re-selects that task from the home screen. Typically, this is done if
&gt; the user hasn&#39;t visited the task for a certain amount of time, such as
&gt; 30 minutes.

**Conclusion?**

 1. Don&#39;t think that handling activity rotation problems can be solved
    by android:configChanges=&quot;orientation&quot;. When you do that you will
    get many other problems that you are not even aware of.
 2. Test your application with DDMS - Stop process button. [See This][1]
 3. Be careful when using static variables. Don&#39;t think that when you initialized them in activity 1 - you will have them initialized in activity 2. The only safe place to initialize global statics would be Application class.
 4. Remember that you may never see onStop or onDestroy. Close files/databases, stop downloaders in onPause. When you want app to do something in BG - use foreground Service.

That would be it ... Hope I helped with my essey :)


  [1]: https://stackoverflow.com/questions/11365301/how-to-simulate-android-killing-my-process/

Android destroying activities, killing processes

I have two activities, A and B.  When activity A is first started, it accesses the &lt;code&gt;Intent&lt;/code&gt; passed to it (because the &lt;code&gt;Bundle&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt;, as it should be the first time through), and displays information accordingly:

    CustInfo m_custInfo;
    ...
    protected void onCreate(Bundle savedInstanceState)
    {
        ...
        Bundle bundle = (savedInstanceState == null) ? getIntent().getExtras() : savedInstanceState;
        m_custInfo = (CustInfo) m_bundle.getSerializable(&quot;CustInfo&quot;);
        if (m_custInfo != null
            ...
    }

This works fine the first time through.  The &lt;code&gt;EditText&lt;/code&gt; controls and &lt;code&gt;ListView&lt;/code&gt; are filled out correctly.

Now, when an item in the list is clicked, activity B is started to show the details:

    m_custInfo = m_arrCustomers.get(pos);
                
    Intent intent = new Intent(A.this, B.class);
    intent.putExtra(&quot;CustInfo&quot;, m_custInfo); // CustInfo is serializable
    // printing this intent, it shows to have extras and no flags
                
    startActivityForResult(intent, 1);

Right before acivity B is started, the framework calls A&#39;s overridden &lt;code&gt;onSaveInstanceState()&lt;/code&gt;:

    protected void onSaveInstanceState(Bundle outState)
    {
        super.onSaveInstanceState(outState);

        outState.putSerializable(&quot;CustInfo&quot;, m_custInfo);
    }

In activity B, when the Up button is pressed in the action bar, I want to return to activity A and have it be in the same state as it was before:

    public boolean onOptionsItemSelected(MenuItem item)
    {
        if (item.getItemId() == android.R.id.home)
        {
            Intent intent = NavUtils.getParentActivityIntent(this);
            // printing this intent, it shows to have flags but no extras

            NavUtils.navigateUpFromSameTask(this); // tried finish() here but that created an even bigger mess
            return true;
        }
        ...
    }

Herein lies the problem, when in &lt;code&gt;onCreate()&lt;/code&gt; of activity A the second time, the &lt;code&gt;Bundle&lt;/code&gt; parameter is &lt;code&gt;null&lt;/code&gt; **and** &lt;code&gt;getExtras()&lt;/code&gt; returns &lt;code&gt;null&lt;/code&gt;.  Since &lt;code&gt;onSaveInstanceState()&lt;/code&gt; was called, I would have expected the &lt;code&gt;Bundle&lt;/code&gt; parameter to be non-&lt;code&gt;null&lt;/code&gt;.

I&#39;ve read about this issue on other web sites, have tried the suggestions, but nothing works.

Returning from an activity using navigateUpFromSameTask()

I am writing an application where `Activity A` launches `Activity B` using 

    startActivityForResult(intent, -101);

but when called, it responded back with following error log:

    E/AndroidRuntime( 1708): java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode
    E/AndroidRuntime( 1708): 	at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:837)

Probably it could be **-101** but I am not sure. Does any one have any idea on this?

Content Type	Original Author	Original Content on Stackoverflow
Question	Aravindh Srinivasan	View Question on Stackoverflow
Solution 1 - Android	Nanne	View Answer on Stackoverflow
Solution 2 - Android	Randroid	View Answer on Stackoverflow

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