1. Storing Information on the device

2. Internal Storage on the device
• You can save files directly on the device's internal storage
• By default, files saved to the internal storage are private to
your application and other applications cannot access them
(nor can the user).
• When the user uninstalls your application, these files are
removed.

3. Usage:
• Call openFileOutput() with the name of the file and the
operating mode. This returns aFileOutputStream
• Write to the file with write()
• Close the stream with close()

4. External Storage
• Every Android-compatible device supports a shared "external
storage" that you can use to save files
• Files saved to the external storage are world-readable and can
be modified by the user

5. Usage:
• Checking media availability :Using getExternalStorageState()
• If you're using API Level 8 or greater,
use getExternalCacheDir() to open a File
• If you're using API Level 7 or lower,
use getExternalStorageDirectory() to open a File

6. Finding the File:

7. Animation in Android

8. Animation
• There are two types of animations that you can do with the
Animation framework of Android.
• Class - android.view.animation.Animation
1. Frame animation
2. Tween animation

9. Frame animation
• A series of frames is drawn one after the other at regular .
• Frame-by-frame animation is handled by the
AnimationDrawable class.

10. android_frame_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<animation-list
xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="@drawable/android_1" android:duration="100" />
<item android:drawable="@drawable/android_2" android:duration="100" />
<item android:drawable="@drawable/android_3" android:duration="100" />
<item android:drawable="@drawable/android_4" android:duration="100" />
<item android:drawable="@drawable/android_5" android:duration="100" />
<item android:drawable="@drawable/android_6" android:duration="100" />
<item android:drawable="@drawable/android_7" android:duration="100" />
</animation-list>

11. Tween animation
• Simple transformations of position, size, rotation etc. to the
content of a View.
• Animation can be defined in XML that performs transitions
such as rotating, fading, moving, and stretching on a graphic.
• If you want to perform more than one Animation you can
define in a <set>.
• <set> is a container that can holds other animation elements
like - <alpha>,<scale>, <translate>,<rotate> or other <set>

12. <alpha>
• A fade-in or fade-out animation
• Attributes:
• android:fromAlpha – Float value. Starting opacity offset.
• android:toAlpha – Float value. Ending opacity offset
• Where 0.0 is transparent and 1.0 is opaque.

13. <scale>
• A resizing animation represents ScaleAnimation.
• You can specify the center point of the image from which it grows
outward (or inward) by specifying pivotX and pivotY.
• <scale
android:fromXScale="float"
android:toXScale="float"
android:fromYScale="float"
android:toYScale="float"
android:pivotX="float"
android:pivotY="float" />

14. <translate>
• A vertical and/or horizontal motion represents TranslateAnimation.
– values from -100 to 100 ending with "%", indicating a percentage relative to itself;
– values from -100 to 100 ending in "%p", indicating a percentage relative to its parent;
– a float value with no suffix, indicating an absolute value.
• <translate
android:fromXDelta="float"
android:toXDelta="float"
android:fromYDelta="float"
android:toYDelta="float" />

15. <rotate>
• A rotation animation represents a RotateAnimation.
• pivotX and pivotY will define the center point of rotation.
• <rotate
android:fromDegrees="float“
android:toDegrees="float"
android:pivotX="float"
android:pivotY="float" />

16. Async Task

17. AsyncTask
• AsyncTask class encapsulates the creation of Threads and
Handlers.
• AsyncTask is started via the execute() method.
• The execute() method calls the doInBackground() and
onPostExecute() method.
• The doInBackground() method contains the coding instruction
which should be performed in a background (separate)
thread.
• The onPostExecute() method updates the UI Thread once
the doInBackground() method finishes.

18. AsyncTask
• AsyncTask<Params, Progress, Result>
• The three types used by an asynchronous task are the
following:
– Params, the type of the parameters sent to the task upon execution.
– Progress, the type of the progress units published during the
background computation.
– Result, the type of the result of the background computation.

19. AsyncTask Coding Sample
public class Sample extends AsyncTask<String, String , String>{
@Override
protected void onProgressUpdate(String... values) {
super.onProgressUpdate(values);
}
@Override
protected String doInBackground(String... params) {
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
}
}

20. Canvas

21. Canvas
• The Canvas class holds the "draw" calls.
• To draw something, you need 4 basic components:
– A Bitmap to hold the pixels
– A Canvas to host the draw calls (writing into the bitmap)
– a drawing primitive (e.g. Rect, Path, text, Bitmap)
– and a paint (to describe the colors and styles for the drawing)

22. Paint and Path

23. Paint
• The Paint object represents the "brush".
• Views draw themself in the onDraw() method.
• Canvas object allows you to perform drawing operations on it,
e.g. draw lines, circle, text and Bitmaps.
• Invalidate(); method forces a view to draw.
• Because of invalidate(); onDraw method is called.

24. Properties
Paint Object Property Description
paint.setAntiAlias(true); Makes the edges smooth.
paint.setColor(Color.RED); Set the paint's color.
paint.setStyle(Paint.Style.STROKE); Set the paint's style, It controls primitive geometry
paint.setStrokeJoin(Paint.Join.ROUND); Sets the paint’s join.
paint.setStrokeWidth(15f); Set the width for stroking.
Touch Event Description
MotionEvent.ACTION_DOWN When you touch the screen
MotionEvent.ACTION_MOVE When you move your finger across the screen
MotionEvent.ACTION_UP When you remove your finger from the screen

25. Process for Project Submission & Evaluation
• Each student is expected to create an Android App as Project
Work for the Course.
• Certificates will be provided to the students after project
submission and evaluation
• At the time of project submission a skype interview will be
conducted.
• The project will be evaluated on Usability, Functionality and
Design.
• We are always there to help you on forum and on skype.

26. Project Plan
Week 4
+
Week 5
Week 6

27. Evaluation Process
10 Days Interviews
Awards
Certificates
Evaluation 7 Days
And Submission

28. •Q & A..?