Errata

The arrow on the far left has gone astray. It needs to be moved down so it's in between "This is our list view" and the ListView.

Wording error:
We won’t complete every part of every app, but feel free to experiment finish them off yourself.

Possible correction:
We won’t complete every part of every app, but feel free to experiment and finish them off yourself.

In Chapter 2, a spurious percent sign (%) appears in the sentence "It includes properties controlling its position, size, appearance, %and what methods it should call in the activity."

Note from the Author or Editor:
The spurious % needs to be removed

In Chapter 2, you write: "Replace your activity_find_beer.xml code with the following:..." The following code is an image and cannot be copied and pasted into the editor; nor is it in the source file that can be downloaded from your site, which has the final version of activity_find_beer.xml. It would be useful for readers if they could copy the code. (I would have tagged this as an enhancement request, if that option were available to me.)

Chapter 5
You specify a relative layout using <LinearLayout>. It should say you specify a linear layout using <LinerLayout>

Chapter 5 GridLayout section

You specify a relative layout using. Should say, you specify a GridLayout by using <GridLayout>

In "Linux Kernel" portion of graphic on this page, "Audio Drivers" says "Audiio Drivers" (extra 'i' in Audio)

Missing word:
It includes core applications such as Contacts, a set of APIs to help you control what your app looks and how it behaves, and a whole load of supporting files and libraries.

Possible correction:
It includes core applications such as Contacts, a set of APIs to help you control what your app looks like and how it behaves, and a whole load of supporting files and libraries.

In the first paragraph on page 3, the paragraph ends without the sentence being completed.

"The Android platform is made up of a number of
different components. It includes core applications
such as contacts, a set of APIs to help you control what
your app looks and behaves like, and a whole load of ..."

Grammar - On page 4 in the questions area, "You really need experience of Java
SE" should read "You really need experience with Java SE"

Issue two with this, I searched in the PDF and the "SE" of "Java SE" does not appear to be defined as Standard Edition before that point in the document. SE isn't even spelled out in the table of contents, where JRE, JDK and JVM are.

Note from the Author or Editor:
Answer for second NDQ. Change the first sentence of the answer to "You need experience with Java SE (Standard Edition)."

The code the design editor adds depends on where you plave the button

- text " “friendly” name that may " not at same indentation as rest of text in that area of the page
- text " 4.0.3-4.0.4 " - other occurrences of ranged version numbers have a space before and after the hyphen

Note from the Author or Editor:
Change the formatting for 4.0.3-4.0.4 in the first column of the table so that it matches the others.

Also, please move the table and its annotations down a few notches so that it's centered vertically in the available space.

An activity an a layout

'Which the learner' should be 'Which the user'

Change "Accept the defaults" to "Accept any other defaults"

Note that if you choose Empty Activity, this screenshot will look different, and won't include as many default options.

Missing space in page title (which causes the title to display incorrectly in the PDF outline):
Android Studio createsa complete folder structure for you

Possible correction:
Android Studio creates a complete folder structure for you

Wrong word:
But what if you don’t have one to hand, or you want to see how it looks on a type of device you don’t have?

Possible correction:
But what if you don’t have one on hand, or you want to see how it looks on a type of device you don’t have?

Note from the Author or Editor:
Replace "to hand" with "with you"

Incomplete sentence: 'Here's the code from acivity_manin.xml that Android'

'Element is the last one' should be 'Element is the first one'

Grammatical error:
Let’s take a closer look at.

Possible correction:
Let’s take a closer look.

Note from the Author or Editor:
The last sentence should be "Let's take a closer look at it"

AndroidManafest.xml instead of AndroidManifest.xml

5th bullet, "you app" should be "your app"

A percent sign is in the paragraph text, should be removed. "It includes properties controlling its position, size, appearance, %and what methods it should call in the activity"

It seems that something is missing here:

"As an example, the XML above specifies that ______. An
equivalent statement would be to say that ______."

Redundant phrasing:
A: IDEs such as Android Studio include lots of time-saving functions and utilities that can save you a lot of time.

Possible correction:
A: IDEs such as Android Studio include lots of functions and utilities that can save you a lot of t

Note from the Author or Editor:
The first sentence of the final answer should be "IDEs such as Android Studio include functions and utilities that can save you a lot of time."

A comma is missing in "the main activity, CreateMessageActivity starts". It should be "the main activity, CreateMessageActivity, starts".

"Create an intent that specifies an"

Missing " Action" at the end.

The package named "com.hfad.stopwatch" is misspaced as "com.hfad. stopwatch" in the Safari ebook.

Missing word:
These values are String resources, so need to be added to strings.xml.

Possible correction:
These values are String resources, so they need to be added to strings.xml.

Subject/Verb agreement:
We’ll use these method to start, stop, and reset the stopwatch.

Possible correction:
We’ll use these methods to start, stop, and reset the stopwatch.

Missing word:
The postDelayed() method works in a similar way to the post() method except that you use it post code that should be run in the future.

Possible correction:
The postDelayed() method works in a similar way to the post() method except that you use it to post code that should be run in the future.

Missing word in "and at the <b> end</b> of its life,"

onCreate(Bundle) repeated

Missing space:
So far we’ve looked at the create and destroy parts of the activity lifecycle,and you’ve seen...

Possible correction:
So far we’ve looked at the create and destroy parts of the activity lifecycle, and you’ve seen...

Should say "StopwatchActivity", not "StopwathActivity"

the Second Button's @+id/button_click_me should be @id/button_click_me
because it only refers to the defined First Button

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button_click_me"
android:layout_below="@+id/button_click_me"
android:text="@string/new_button_text" />

should be

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@id/button_click_me"
android:layout_below="@id/button_click_me"
android:text="@string/new_button_text" />

Note from the Author or Editor:
Change the third paragraph to: The syntax "@+id" tells Android to include the ID as a resource in its resource file R.java. You must include the "+" whenever you define a new view in the layout. If you don't, Android won't add the ID as a resource and you'll get errors in your code.

Add an annotation that points to the two lines of code at the bottom of the page that says: When you're referring to views that have already been defined in the layout, you can use @id instead of @+id.

Wrong word?:
If you miss out the "+", Android won’t add the ID as a resource and you’ll get errors in your code.

Possible correction:
If you leave out the "+", Android won’t add the ID as a resource and you’ll get errors in your code.

Arrow overlaps the corresponding text:
Spinners are a more complex type of View.

Confusing wording:
As a view group is also a type of view, this means that all layouts and GUI components share this common functionality.

Possible correction:
Since a view group is also a type of view, all layouts and GUI components share this common functionality.

Second block of paragraphs, first paragraph:

"When the learner clicks on an item in the list,
the app uses their selection to navigate to a
separate activity."

You might want to exchange "learner" for "user".

==> "When the user clicks on an item in the list..."

btw:
In this block's first paragraph, reading:

"When the user launches the app, the user will
be presented with the top level activity, the
main entry point of the app."

you might perhaps want (or maybe not) to exchange the second "user" for "he" or "she".

Change https://tinyurl.com/HeadFirstAndroid to http://tinyurl.com/HeadFirstAndroidCoffeeImages.

Change "drag the file" to "drag each file"

The code font meant for "CheckBox" in the word "CheckBoxes" extends to include the adjoining e so that "CheckBoxe" is in code font.

The comment on the static array "workouts" reads:

"workouts is an array of three Workouts"

but in an effort to enhance our fitness, you created an additional 4th exercise. Thus, the comment should read:

"workouts is an array of four Workouts"

;-)

Whoa! Your Workout class is the REAL thing - it's got an IT department of it's own - or did you just mean "id" instead of "it"?

"Later on we’ll use the workout it to update the fragment’s views."

;-)

Missing "the":

The paragraph currently reads:

"We’re using the code frag.setWorkout(1) to tell fragment which
workout we want it to display details of. "

Should probably read:

"...to tell the fragment... "

Duplicate word:
Just as with a list activity, there are are a couple...

Correction:
Just as with a list activity, there are a couple...

Missing "a" in the first paragraph starting with:

"A list fragment is type of fragment that..."

should probably read:

"A list fragment is a type of fragment that..."

The first paragraph in that sidebar reads:

"A ListFragment is a type of Fragment that’s specializes in working with a ListView."

==> should probably read

"...a type of Fragment that specializes..."

The first paragraph after the section title currently reads:

"When we run the app, a list of the workouts appears in a list on the left of the screen, and details of a single workout appears on the
right."

==> probably should read:

"...and details of a single workout appear on the
right."

The second @Override annotation is slightly misindented.

Note from the Author or Editor:
An extra space needs to be added before the second @Override

The paragraph reads:

"That way, we can store the fragment replacement inside a back stack transaction, and the user will be unable to undo the change by hitting the back button."

==> should read:

"...and the user will be able to undo the change..."

Note from the Author or Editor:
First paragraph "will be unable to undo the change" should be "will be able to undo the change".

"These code snippets were not needed here" is shown on both the question page and the solution page, when presumably it should only be shown on the solution page.

Note from the Author or Editor:
Remove the annotation and arrow on page 317 that says "These code snippets were not needed here"

The paragraph currently reads:

" If we looks at the lifecycles of fragments and activities, we’ll see that they’re very similar:"

==> should read:

" If we look at the lifecycles..."

Missing word: "to"

The 4th paragraph currently reads:

"Give the fragment a name of “StopwatchFragment”, a layout name of “fragment_stopwatch”, and untick the options include fragment factory methods and interface callbacks."

==> should read:

"...and untick the options to include..."

Misspelled word:
getFragmentManager() creates transactions at the activity lavel

Correction:
getFragmentManager() creates transactions at the activity level

Stack trace shows package com.hfad.fraghack, but code on p. 332 shows package com.hfad.workout.

Note from the Author or Editor:
Change all instances of "fraghack" on this page to "workout"

"onClickListener" should be "OnClickListener" (upper camel case).

Wording error:
This turns StopwatchFragment into a type of View.OnClickListener so that it can respond to when views are clicked.

Correction:
This turns StopwatchFragment into a type of View.OnClickListener so that it can respond when views are clicked.

Just a minor text layout issue:

In the paragraph:

"This turns StopwatchFragment into a type of View.
OnClickListener. so that it can respond to when views are clicked."

it would be nice to have "View.OnClickListener" on the same line and the dot currently following "View.OnClickListener. " removed.

"R.layout.stopwatch" should be "R.layout.fragment_stopwatch".

Note from the Author or Editor:
Update the code on pages 351 and 352 to change R.layout.stopwatch to R.layout.fragment_stopwatch

The PDF bookmarks for Chapter 9 include the headings of the detail screens (Pizzas, Stores, Pasta, Pizzas, Cambridge, etc) as well as one for "android:id" (which just goes to one of the entries in the table on page 377).

"The action bar has a number of uses":

2nd bullet point:

"For making key actions prominant in a way..."

should read:

"... prominent in a way..."

Change "is" to "it":

"In our case, the style has a name of "AppTheme", so AndroidManifest.xml can refer to is using "@style/AppTheme".

should read:

"...AndroidManifest.xml can refer to it using..."

The paragraph currently reads:

"By default, we want to use a theme of Theme.Holo.Light, so make this needs to be reflected in the <style> attribute like this:"

Maybe eliminate the "make":

"...so this needs to be reflected..."

Might want to exchange "attribute" for "element":

If your project has a dependency on the v7 appcompat library,
showAsAction must be prefixed with app:, and the <menu>
attribute must include an attribute of xmlns:app="http://schemas.android.com/apk/res-auto"

should read:

"... and the <menu>
element must include an attribute of ..."

Note from the Author or Editor:
Three quarters of the way down the page under "If your project has a dependency on the v7 appcompat library", <menu> attribute should be <menu> element.

The instructions say to download the Android icon pack from https://developer.android.com/design/downloads/index.html, then copy ic_action_new_event icons from the icon pack's Action Bar Icons/holo_light/05_content_new_event folder into the project. It appears that the action pack has been replaced by the Material icon pack available on GitHub. There doesn't appear to be a "new event" icon in the new set.

Further, the instructions "Copy the icon in the drawable-hdpi folder to the drawable_hdpi folder in your project, and so on" aren't clear to me. Exactly which files do I need to copy?

Note from the Author or Editor:
The Android icon pack was replaced with the Material icon collection after the book was published. Replace paragraphs 2, 3 and 4 with the following:

When you use icons in your action bar, you can create your own or use icons from the Android action bar icon pack. The icon pack contains many standard icons you can use in your apps, and you can get it from https://developer.android.com/design/downloads/index.html.

We’re going to use an icon called ic_action_new_event, and we’ll use a different size icon for different screen densities. To use the icon, go to http://tinyurl.com/HeadFirstAndroidNewEventIcons, download
ic_action_new_event.jpg from the drawable-hdpi folder, and add it to the drawable-hdpi folder in your project. Then repeat this for the drawable-mdpi, drawable-xhdpi and drawable-xxhdpi folders.

There are unneeded semicolons at the ends of the two class definitions.

Note from the Author or Editor:
The two lines of code that say }; should be changed to }. This also affects pages 414, 419, 429 and 430

"If you have items on your action bar that are specific to the contents of a particular fragment, you may want to hide them when the drawer is open, and display them again when the drawer is open."

should be

"If you have items on your action bar that are specific to the contents of a particular fragment, you may want to hide them when the drawer is open, and display them again when the drawer is closed."

The last two paragraphs refer to the Starbuzz database, but shouldn't it be the Starbuzz app or program?

The app gets its data from the Drink class now, but will in the future get it from a database. I could be wrong, but ... it is referring to the past tense.

The sentence " ... we're going to change the Starbuzz database so that it gets its data from a SQLite database" is illogical.

Note from the Author or Editor:
Change "we're going to change the Starbuzz database" to "we're going to change the Starbuzz app"

Missing word:
We’ll store drinks in a database rather the Drink class.

Correction:
We’ll store drinks in a database rather than the Drink class.

Page 444 gives us the initial code for StarbuzzDatabaseHelper. The code includes an empty constructor with one argument (Context). This will lead to an error in the IDE because the superclass SQLiteOpenHelper doesn't have a no-args constructor. We're being told how to fix this on the next page, but it would be nice to put a comment or annotation into the empty constructor on page 444 that tells us we'll be fixing the problem later.

Note from the Author or Editor:
Add an annotation that says "We'll write the code for the constructor on the next page" that points to the line of code "StarbuzzDatabaseHelper(Context context) {"

"... like a number of a piece of text" should be "... like a number or a piece of text"

There three spots in these paragraphs where a class/method name is typeset in boldface montoype. All other in-text class/method names are typeset in normal weight monotype. If the boldface was chosen in these three spots for emphasis then it isn't clear from the text why they are emphasised.

Note from the Author or Editor:
Change the following so they're not emboldened:
SQLiteDatabase insert() in paragraph 2
ContentValues in paragraph 3
put() in paragraph 4

Missing space:
null, null,null);

Correction:
null, null, null);

Note from the Author or Editor:
Instances of "null,null" in this chapter need to be replaced with "null, null".

"the users favorite drinks" should be "the user's favorite drinks".

"the users favorite drinks" should be "the user's favorite drinks".

Missing period:
Display a message if there’s a problem with the database

Correction:
Display a message if there’s a problem with the database.

@Override missing before onRestart().

Note from the Author or Editor:
@Override needs to be inserted just above the line that says public void onRestart() {

Subject/verb agreement:
All of the other thread that you create

Correction:
All of the other threads that you create

Wording error:
We must to run the code to update the views on the main thread, otherwise we get an exception.

Correction:
We must run the code to update the views on the main thread, otherwise we get an exception.

Missing word:
The onProgressUpdate() method is called on the main event thread, so has access to views in the user interface.

Correction:
The onProgressUpdate() method is called on the main event thread, so it has access to views in the user interface.

Missing word:
It’s called on the main event thread, so has access to views in the user interface.

Correction:
It’s called on the main event thread, so it has access to views in the user interface.

Missing word:
The onPostExecute() method gets passed the results of the doInBackground() method, so must take parameters that match the doInBackground() return type.

Correction:
The onPostExecute() method gets passed the results of the doInBackground() method, so it must take parameters that match the doInBackground() return type.

Missing word:
the doInBackground() method runs in a background thread, so can’t update views.

Correction:
the doInBackground() method runs in a background thread, so it can’t update views.

//Code that you wan to run when the task is complete
should be:
//Code that you want to run when the task is complete

want is missing the "t"

In your source code at github [https://github.com/dogriffiths/HeadFirstAndroid/blob/master/chapter12/Starbuzz/app/src/main/java/com/hfad/starbuzz/DrinkActivity.java#L84], you are missing a line break between statements on line 84.

Note from the Author or Editor:
We've added a line break to the source code.

Slight typo in step 4 of AsynchTask steps where finished is spelt as "finsihed"

Note from the Author or Editor:
Change "finsihed" to "finished"

Line is:

The notification service deals will all of the issues involved in a
background service sending updates to the screen.

Should Be: (will --> with )

The notification service deals with all of the issues involved in a
background service sending updates to the screen.

Wording error:
This method has one parameter, a Location object that represents the device current location.

Correction:
This method has one parameter, a Location object that represents the device's current location.

Wording error:
The activity will call this method whenever it want to know the distance.

Correction:
The activity will call this method whenever it wants to know the distance.

Change https://tinyurl.com/HeadFirstAndroid to http://tinyurl.com/HeadFirstAndroidPizzaImages

Wording error:
Each Pizza has a name and image resource ID. The image resource ID refers to the drink images we added to the project above.

Correction:
Each Pizza has a name and image resource ID. The image resource ID refers to the pizza images we added to the project above.

Or, simply:
Each Pizza has a name and image resource ID. The image resource ID refers to the images we added to the project above.

The code notes font seems to override the code font which make this statement very difficult to parse. (Look at the original text since the code font won't appear in this form.):
This needs to be a Context. If you use this code in an activity, you use this instead of getActivity().

Specifically:
"If you use this code in an activity, you use this instead"

In the first instance of "this" I suppose you mean what the code notes arrow is pointing to (i.e. "getActivity()"), but in the second instance of "this" I suppose you are referring to the Java reserved word "this". It's not at all clear without some sort of font differentiation or way to separate the two different references that use the same word.

Note from the Author or Editor:
Change this to "this" in the third line of the top annotation.

Wording error:
All of the apps running on your Android device sending their output to a central stream called the logcat.

Correction:
All of the apps running on your Android device send their output to a central stream called the logcat.