android ppt

Introduction to Android Technology

Er. Girish Kumar ShakyaAndroid Developer

AgendaWhat is an Android ?

History of Android

System Architecture

The Open Handset Alliance (OHA)

Anatomy of an Android application

Android Activity Life Cycle


Android is an open software platform for Mobile Development.

What is an Android?

Operating Systems

Middleware

Applications

www.android.com

developer.android.com


History of Android ?

Android 1.5 (Cupcake)

support for soft (onscreen) keyboards

video recording

application widgets

more than 1,000 changes to API


History of Android ?(cont..)

Android 1.6 (Donut)

High and Low Density Display

a Number of minor changes



Android 2.0 (Eclair)

multi-touch

Virtual keys

centralized account management

synchronization APIs

Docking

HTML5 and more



Android 2.1 (Eclair Maintenance Release 1)

more HTML5 support

other minor improvement

Home screen enhancements

live wallpaper and widgets



Next Generation (FroYo)

Then - Gengerberd


System Architecture


Hardware Abstraction Layer

Security

Memory Management

Process Management

Network Stack

Driver Model


C or C++

Compiled for particular architecture

Surface Manager

No screen buffer off screen bitmaps (combined with other bitmaps)

2D and 3D graphics

Media Codecs

AAC, AVC, H.263, MP3, MPEG4

SQL Database (Firefox/iPhone)

Browser Engine (Crome, Safari, iPhone, Nokia S60)Er. Girish Kumar Shakya

Android Developer

- Dalvik Virtual Machine

Googles implementation of Java

Optimized for Mobile devices

Runs .dex files

More compact and efficient than .class files

Memory and power concerns

Core Java libraries are different from JavaSE and

JavaMEEr. Girish Kumar Shakya

Android Developer

Building block for creating ApplicationsPre Installed in AndroidActivityManager- Control Activity Life CycleContentProvider Encapsulates any data to share between applications (contacts)ResourceManager- Parts of program that are not code (sound bites, video, images)LocationManager- Android always know where it is........NotificationManager- Events, messages, appointments, any alerts.........


Apps

- Programs which take over the entire screen

Widgets (Gadgets)

Operate in a small rectangle of Home screen


The Open Handset Alliance (OHA) is a collection of more than 30 technology companies including hardware manufacturers, mobile carriers, and software developers. Of particular note are the prominent mobile technology companies Motorola, HTC, T-Mobile, and Qualcomm. In their own words, the OHA represents:

A commitment to openness, a shared vision for the future, and concrete plans to make the vision a reality. To accelerate innovation in mobile and offer consumers a richer, less expensive, and better mobile experience.

Open Handset Alliance


Open Handset Alliance (cont..)

Some of the alliances prominent members are as follow:

Sprint Nextel

T-Mobile

Motorola

Samsung

Sony Ericsson

Toshiba

Vodafone * Google * Intel * Texas Instruments


Anatomy of an Android application

Lets create a simple Android TutorialBasic Application.


How to make an Android Application ?


SCREEN


Intent


Model

View

i.e.

Model 1+ View 1= Activity 1


Model

Java (Logic)


View

XML (Layout)


Controller

AndroidManifest.xml


Model

Java (Logic)


View

XML (Layout)


Controller

AndroidManifest.xml


CONTROLLER(AndroidManifest.

xml)

ACTIVITY 1

ACTIVITY 2

Intent


CONTROLLER(AndroidManif

est.xml)

ACTIVITY 1

ACTIVITY 2

Intent 2

ACTIVITY 3

Intent 3


ACTIVITY (n)

(1)Controller(AndroidManifest.xml)

1 Model + 1 View = 1 Activity


Open Eclipse IDE

Close the Welcome Window if Open

Go to File -> New -> Other -> Android -> Android Project.

Give Project Name : TutorialBasic

Select Target Name as : Android2.2

Click Next

Give Package Name: my.hello.world

Then click Finish.

TutorialBasic Application


Application Name (Project Node)

Source Folder. Here we put allJava Code

Java Code also Known as Model or Activity Source Code in Java Format

Auto Generated Code by Eclipse

Target SDK or Platform here Android2.2

APK or also known as single Out putFile

Resource Folder.. Collections of all Your resources.

Layout Folder Your VIEWs in XMLFormat

Controller Er. Girish Kumar ShakyaAndroid Developer

Res Folder

Resources: Text , pictures, sound etc. Everything is broken out of the code into a resource, which is reference in a class

called R.Er. Girish Kumar ShakyaAndroid Developer

Src Folder

Collection of your packages, Activity Class, Common Java Classes


Displays a user interface component and responds to system/user initiated.

When an application has a user interface, it contains one or more Activities One activity is then considered as the main entry point by the system

An existing Activity can be replaced with a new one that fulfill the same contract

Each Activity can be invoked from others applications

What is really an Activity?


Adding a new Activity in an Android project

The new Java class must extend the framework Activity class

Created Activity must be defined into the applications Manifest

What is really an Activity?


Running in the multitasking environment

Users switch apps,calls come in,system run low on memory

System invoke callbacks in your application

The System will kill your application

Be sure to save state

Anatomy of App (Activity lifecycle)



Activity Created

onCreate()

onResume()

Activity Running Er. Girish Kumar Shakya

Android Developer


onResume()

Activity Running

Call Comes in

onPause()Er. Girish Kumar Shakya

Android Developer


onResume()

Activity Running

Call Comes in

onPause()Low

Memory

Activity Destroy

Return to App


Intents / Intent Filters

Simple message objects that represent:

An intention to do something

A declaration of capacity and interest in ofering assistance to those in need


Intents / Intent Filters (cont)

An intent is made up a number off pieces off information describing the action or the service:

action attribute is typically a verb (VIEW, EDIT, DIAL,)

The data to operate on is expressed in the form off an Universal Resource Identifier (URI)

category attribute gives additional information about the action to executeEr. Girish Kumar Shakya

Android Developer

Receivers

When an application desires to receive and respond to a global event..

In order to be triggered when an event occurs,, application does not have to be running

By default,, Android includes some built-in Intents Receiver


Receivers

How to receive these specific Intents?

The user class must extend the framework IntentReceiver class

To process incoming Intents,, onReceiveIntent() method is implemented

receiver element must be described into the application's Manifest


Service(A long running background task)

Defining and invoking a Service

Adding a Service with Android is quite similar tthan for an Activity..

Framework Service class must be extended

The new Service must be defined into the application's Manifest


Service(cont..)(A long running background task)

When a Service is using IPC, an AIDL description of its features is also needed..

Android Interface Definition Language (AIDL) is used to generated code to allow communication between two processes through IIPC

This mechanism is interface-based,, similar to Cobra (Unix) or COM (windows) but lighter weight

With this specific mode, the Service is started through the binder and not with startService()


ContentProvider(Handle data and expose them to

other applications)

The only way to share data between Android applications..

It implements a standard set of methods to allow access to a data store

Any form off data storage can be used like SQLite database,, files,, or memory hash map


ContentProvider(cont..)(Handle data and expose them to

other applications)

A Content Providers exposes a unique URI used to query,add,update and delete data::

A standard prefix (content:://)

The authority part (fully-qualified to ensure uniqueness)

The path to determine what kind off data is being requested

A specific record being requested,, if any


Processes and Task (A Task between Kernel and

Android)Processes

A low-level kernel process in which an application's code is running..

By default,, Android binds the content off an APK to a Linux process

Process tag can be used to tune this relation with a lower granularity (activity, service,)

Tasks

A notion that users know on other platform as application..

A collection of related Activities

Capable of spanning multiple processes

Interaction with Activities can be controlled through Activity's launchMode attribute


Processes and Task(cont.)(A Task between Kernel and

Android)


Using XML based layouts Using Basic Widgets Working with Containers Using Selection Widgets Using Fancy Widgets and Containers Applying Menus Embedding the WebKit browser Showing Pop-up Messages Dealing with Threads Handling Activity Lifecycle events


Text Controlso TextViewo EditText (EditText control is subclass of TextView)o AutoCompleteTextViewo MultiAutoCompleteTextView

Button Controlso Buttono ImageButtono ToggleButton

CheckBox RadioButton Spinner ProgressBar RatingBar SeekBar


Text Controls


Text Controls

Declare TextView

TextView tv;


Text Controls

Initialize or Bind it in your Activity TextView

tv=(TextView)findViewById(R.id.textView1);


Text Controls

Initialize or Bind it in your Activity TextView

tv=(TextView)findViewById(R.id.textView1);tv.setText(I Love my India);


Text Controls


Text Controls

EditText simpleEdit;AutoCompleteTextView autoEdit;MultiAutoCompleteTextView multiEdit;Button mybtn;

Declare your Views:


Text Controls

simpleEdit=(EditText)findViewById(R.id.editText1);autoEdit=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);multiEdit=(MultiAutoCompleteTextView)findViewById(R.id.multiAutoCompleteTextView1);mybtn=(Button)findViewById(R.id.button1);

Initialize your view


Text Controls

mybtn.setOnClickListener(new OnClickListener() {

public void onClick(View v) {// TODO Auto-generated method stub/// Put some code here}});

Add listener and perform some Event say OnClickListener() and OnClick()


Text Controls

mybtn.setOnClickListener(new OnClickListener() {

public void onClick(View v) {// TODO Auto-generated method stub

simpleEdit.setText("Hello");autoEdit.setText("Hi");multiEdit.setText("Bye");}

});

Add listener and perform some Event say OnClickListener() and OnClick()


Text Controls


Button Controls


Button Controls

Declare your Views

Button simpleBtn;ImageButton imgBtn;ToggleButton toggleBtn;


Button Controls

Initialize or Bind your Views

simpleBtn=(Button)findViewById(R.id.button1);imgBtn=(ImageButton)findViewById(R.id.imageButton1);toggleBtn=(ToggleButton)findViewById(R.id.toggleButton1);


Button Controls

Perform Listener and Event

simpleBtn=(Button)findViewById(R.id.button1);imgBtn=(ImageButton)findViewById(R.id.imageButton1);toggleBtn=(ToggleButton)findViewById(R.id.toggleButton1);


Button Controls

Listener and Event simpleBtn

simpleBtn.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stub//do something useful}});


Button Controls

Listener and Event simpleBtn

simpleBtn.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubToast.makeText(MainActivity.this, "I Clicked On Button",

Toast.LENGTH_SHORT).show();}});


Button Controls

Listener and Event imageBtn

imgBtn.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stub//put some code here}});


Button Controls

Listener and Event imageBtn

imgBtn.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubToast.makeText(MainActivity.this, "I Clicked On Image Button", Toast.LENGTH_SHORT).show();}});


Button Controls Listener and Event toggleBtn

toggleBtn.setOnCheckedChangeListener(new OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stub

//put some code here}});


Button Controls Listener and Event toggleBtn

toggleBtn.setOnCheckedChangeListener(new OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked){Toast.makeText(MainActivity.this, "Run Charlie Run !!",

Toast.LENGTH_SHORT).show();}else{Toast.makeText(MainActivity.this, "Stop Charlie !!",

Toast.LENGTH_SHORT).show();}

}});


Button Controls


CheckBox


CheckBoxDeclare your checkboxes

CheckBox chk1;CheckBox chk2;CheckBox chk3;


CheckBoxInitialize your checkboxes

chk1=(CheckBox)findViewById(R.id.checkBox1);




CheckBoxSet your listener (OnCheckedListener)

chk1.setOnCheckedChangeListener(this);chk2.setOnCheckedChangeListener(this);chk3.setOnCheckedChangeListener(this);


CheckBoxSet your listener (OnCheckedListener)

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubint id=buttonView.getId();switch(id){case R.id.checkBox1:if(isChecked)Toast.makeText(this, "Fish", Toast.LENGTH_SHORT).show();break;case R.id.checkBox2:if(isChecked)Toast.makeText(this, "Chicken", Toast.LENGTH_SHORT).show();break;case R.id.checkBox3:if(isChecked)Toast.makeText(this, "Dosa", Toast.LENGTH_SHORT).show();break;}}


CheckBox


RadioButton


RadioButton

Declare RadioGroup

RadioGroup rg;


RadioButton

Initialize RadioGroup

rg=(RadioGroup)findViewById(R.id.radioGroup1);


RadioButton

Perform Listener and event

rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {

public void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stub//put some code here}});


RadioButtonPerform Listener and event

rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {public void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stubswitch(checkedId){case R.id.radio0:Toast.makeText(MainActivity.this, "Fish", Toast.LENGTH_SHORT).show();break;case R.id.radio1:Toast.makeText(MainActivity.this, "Chicken", Toast.LENGTH_SHORT).show();break;case R.id.radio2:Toast.makeText(MainActivity.this, "Dosa", Toast.LENGTH_SHORT).show();break;}}});


RadioButton


Spinner , AutoCompleteTextView, MultiAutoCompleteTextView



Er. Girish Kumar Shakya

Android Developer


Declare your View

Spinner spinner;AutoCompleteTextView autoEdit;MultiAutoCompleteTextView multiEdit;



Declare your View

Spinner spinner;AutoCompleteTextView autoEdit;MultiAutoCompleteTextView multiEdit;String[] list={"Sunday","Monday","Tuesday","Wednesday","Thrusday","Friday","Saturday"};



Initialize your View

spinner=(Spinner)findViewById(R.id.spinner1);

autoEdit=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);

multiEdit=(MultiAutoCompleteTextView)findViewById(R.id.multiAutoCompleteTextView1);



Create an Object of ArrayAdapter

ArrayAdapter adapter=new ArrayAdapter(this, android.R.layout.simple_dropdown_item_1line, list);



Set Adapter to Spinner


spinner.setAdapter(adapter);



Set Adapter to AutoCompleteTextView


spinner.setAdapter(adapter);autoEdit.setAdapter(adapter);



Set Adapter to AutoCompleteTextView


spinner.setAdapter(adapter);autoEdit.setAdapter(adapter);

multiEdit.setAdapter(adapter);multiEdit.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());


ProgressBar


RatingBar


RatingBar

TextView rateText;RatingBar rateBar;

Declare your View


RatingBar

rateText=(TextView)findViewById(R.id.textViewRateValue);rateBar=(RatingBar)findViewById(R.id.ratingBar1);

Initialize or Bind your View


RatingBar

rateBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {public void onRatingChanged(RatingBar ratingBar, float rating,boolean fromUser) {// TODO Auto-generated method stub

rateText.setText("rating is:"+rating);}});

Perform Listener

setOnRatingBarChangeListener()


RatingBar


SeekBar


SeekBar

Declare your views

TextView pertxt;SeekBar seek;


SeekBar

Initialize or bind your views

pertxt=(TextView)findViewById(R.id.textView1); seek=(SeekBar)findViewById(R.id.seekBar1);


SeekBarPerform Listener on SeekBar(setOnSeekBarChangeListener)

seek.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

public void onStopTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stub

}

public void onStartTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stub

}

public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// TODO Auto-generated method stub//put some here}});


SeekBarPerform Listener on SeekBar(setOnSeekBarChangeListener)

seek.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

public void onStopTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stub

}

public void onStartTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stub

}

public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// TODO Auto-generated method stubpertxt.setText("your percentage is: "+progress);}});


SeekBar


Organizes its children either horizontally or vertically LinearLayout

TableLayout

RelativeLayout

FrameLayout

Organizes its children in tabular form

Organizes its children relative to one another or to the parent

Allows you to dynamically change the control(s) in the layout


LinearLayout


TableLayout


Relative Layout


FrameLayout


Pick and Choose

o DatePicker

o TimePicker


TextView tv;DatePicker dp;TimePicker tp;Button clickDp;Button clickTp;

Declare your views


tv=(TextView)findViewById(R.id.textViewDateandTime);dp=(DatePicker)findViewById(R.id.datePicker1);tp=(TimePicker)findViewById(R.id.timePicker1);clickDp=(Button)findViewById(R.id.buttondate);clickTp=(Button)findViewById(R.id.buttontime);

Initialize or bind your views


clickDp.setOnClickListener(this);clickTp.setOnClickListener(this);

Perform Listeners and Events


public void onClick(View v) {// TODO Auto-generated method stub

switch(v.getId()){case R.id.buttondate:String []month={"Jan","Feb","March","April","May","June","July","Aug","Sep","Oct","Nov","Dec"};String

strdate=dp.getDayOfMonth()+"/"+month[dp.getMonth()]+"/"+dp.getYear();

tv.setText(strdate);break;case R.id.buttontime:String

timestr=""+tp.getCurrentHour()+":"+tp.getCurrentMinute();tv.setText(timestr);

break;}

}

Perform Listeners and Events


AnalogClock

DigitalClock


Creating a simple Menu


Creating a simple Menu@Override

public boolean onCreateOptionsMenu(Menu menu) {

// TODO Auto-generated method stub

super.onCreateOptionsMenu(menu);

MenuInflater menuInflator=getMenuInflater();

menuInflator.inflate(R.menu.mymenu, menu);return true;}

@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubsuper.onOptionsItemSelected(item);//add some codereturn true;}



@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubsuper.onOptionsItemSelected(item);switch(item.getItemId()){

case R.id.mp:Toast.makeText(MainActivity.this, "Madhya Pradesh",

Toast.LENGTH_SHORT).show();break;case R.id.andhra:Toast.makeText(MainActivity.this, "Andhra Pradesh",

Toast.LENGTH_SHORT).show();break;return true;

}


WebView


Toast Alert

ToastA Toast is a transient message, meaning that it displays and disappears onits own without user interaction.

Alert A subclass of Dialog that can display one, two or three buttons.


Toast

Toast.makeText(this, "", Toast.LENGTH_SHORT).show();


AlertDialog

AlertDialog.Builder alert=new AlertDialog.Builder(this);alert.setTitle(MessageDemo);alert.setMessage(Hello Friends);alert.show();


Example:

toastbtn.setOnClickListener(new OnClickListener() {

@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast.makeText(PopUpDemo.this, "Hello from toast", Toast.LENGTH_SHORT).show();}});

alertbtn.setOnClickListener(new OnClickListener() {

@Overridepublic void onClick(View v) {// TODO Auto-generated method

stubAlertDialog.Builder alert=new

AlertDialog.Builder(PopUpDemo.this);alert.setTitle("MessageDemo");alert.setMessage("welcome to

India");alert.show();}});


Example:


....


Intents are used as a message-passing mechanism

Explicitly (by specifying the class to load)

Implicitly (by specifying inside AndroidManifest.xml)


Declare your View

EditText edit;Button btnClk;


Initialize your View

edit=(EditText)findViewById(R.id.editText1);btnClk=(Button)findViewById(R.id.button1);


Prepare Listener and Event

btnClk.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubIntent intent=new Intent();intent.setClass(FirstActivity.this,

SecondActivity.class);startActivity(intent);

}});


@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.second);}


AndroidManifest.xml


putExtra(String name, boolean value);

putExtra(String name, int value);

putExtra(String name, double value);

putExtra(String name, String value);

Passing Message between Activity

Intent intent = new Intent();Intent.setClass(FirstActivity.this, SecondActivity.class);

intent.putExtra(key,value);

startActivity(intent);


Bundle bundle=getIntent().getExtras();

String str=bundle.getString(Key);

boolean b=bundle.getBoolean(Key);

int b=bundle.getInt(Key);

float b=bundle.getFloat(Key);

double b=bundle.getDouble(Key);


Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setData(Uri.parse("http://www.google.com"));

startActivity(intent);

Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);intent.setData(Uri.parse("http://www.google.com"));startActivity(intent);

Intent intent = new Intent(Intent.ACTION_CALL);intent.setData(Uri.parse("tel:555-555-5555"));startActivity(intent);

Intent intent = new Intent(Intent.ACTION_DIAL);startActivity(intent);


Declare Views

EditText edittextBrowser;Button btngo;Button btnsearch;Button btncall;Button btncallme;


Initialized or Bind Views

edittextBrowser=(EditText)findViewById(R.id.editTextbrowser);btngo=(Button)findViewById(R.id.buttonGo);btnsearch=(Button)findViewById(R.id.buttonSearch);btncall=(Button)findViewById(R.id.buttoncall);btncallme=(Button)findViewById(R.id.buttoncallme);


Perform Listener and Event

btngo.setOnClickListener(this);btnsearch.setOnClickListener(this);btncall.setOnClickListener(this);btncallme.setOnClickListener(this);


switch(v.getId()){case R.id.buttonGo:intent = new Intent(Intent.ACTION_VIEW);intent.setData(Uri.parse("http://"+edittextBrowser.getText().toString()));startActivity(intent);break;case R.id.buttonSearch:intent = new Intent(Intent.ACTION_WEB_SEARCH);intent.setData(Uri.parse("http://www.google.com"));startActivity(intent);break;case R.id.buttoncall:intent = new Intent(Intent.ACTION_DIAL);startActivity(intent);break;case R.id.buttoncallme:intent = new Intent(Intent.ACTION_CALL);intent.setData(Uri.parse("tel:9584458363"));startActivity(intent);break;}


ListView is used to display a scrollable list of items.

ListView gets the data to display via an adapter.


ListView

ListActivity

setListAdapter(ArrayAdapter);

setOnItemselectedListener();


public class ListSampleDemoActivity extends ListActivity {

ArrayList days;

}


@Overridepublic void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

days=new ArrayList( );

days.add("Sunday"); days.add("Monday"); days.add("Tuesday");

days.add("Wednesday"); days.add("Thursday"); days.add("Friday");

days.add("Saturday");

setListAdapter(new ArrayAdapter(this, R.layout.main,days));

}


@Overridepublic void onCreate(Bundle savedInstanceState)

{super.onCreate(savedInstanceState);

..setListAdapter(new ArrayAdapter(this, R.layout.main,days));ListView listview=getListView();}



..ListView listview=getListView();listview.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView adapter, View view, intposition,long arg3) {// TODO Auto-generated method stubString itemname=adapter.getItemAtPosition(position).toString();Toast.makeText(ListSampleDemoActivity.this, itemname, Toast.LENGTH_SHORT).show();}});} Er. Girish Kumar Shakya

Android Developer

You can also define your own layout for the rows and assign this layout to your row adapter. We will add a graphic to each list entry.


public class ListViewWithGraphicsActivity extends Activity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);setContentView(R.layout.main);

}}


public class ListViewWithGraphicsActivity extends ListActivity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);setContentView(R.layout.main);

}}




// Create an array of Strings, that will be put to our ListActivityString[] names = new String[] { "Linux", "Windows7", "Eclipse", "Suse",

"Ubuntu", "Solaris", "Android", "iPhone" };

// Use your own layout and point the adapter to the UI elements which// contains the label

this.setListAdapter(new ArrayAdapter(this, R.layout.main,R.id.label, names));

}







this.setListAdapter(new ArrayAdapter(this, R.layout.main,R.id.label, names));

}Er. Girish Kumar Shakya

Android Developer






this.setListAdapter(new ArrayAdapter(this,

R.layout.main,R.id.label, names));

}Er. Girish Kumar Shakya

Android Developer






this.setListAdapter(new ArrayAdapter(this,

R.layout.main,R.id.label, names));}



super.onCreate(savedInstanceState);..this.setListAdapter(new ArrayAdapter(this,

R.layout.main,R.id.label, names));listview.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView adapter, View view, intposition,long arg3) {// TODO Auto-generated method stubString item=adapter.getItemAtPosition(position).toString();Toast.makeText(ListViewWithGraphicsActivity.this, item, Toast.LENGTH_SHORT).show();}});}


o A Browser

o Loading It Up

o Navigation


WebView is not significantly different than any other widget in Android pop it into a layout, tell it what URL to navigate to via Java code, and you're done.

loadUrl();

loadData();


public class WebBrowserDemoActivity extends Activity {WebView browser;

/** Called when the activity is first created. */@Override

public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);

browser=(WebView)findViewById(R.id.webkit);browser.loadUrl("http://www.google.com");

}}


browser.loadData(Hello, world! ,"text/html", "UTF-8

);


reload()

goBack()

goForward()

canGoForward()

goBackOrForward()

canGoBackOrForward()

goBackOrForward()

clearCache()

clearHistory()


Er. Girish Kumar Shakya(DAC,CDAC,Pune(Mh.)


Particularly used to store your data.

That can be Shareable within your all activities in an application.

Or might be Shareable across application.

Data sharing done by using key/values pairs(akin to Map).


To get access to the preferences, you have two APIs to choose from:

1. getPreferences() from within your Activity,

to access activity specific preferences

2. getSharedPreferences() from within your

Activity (or other application Context), to

access application-level preferences


Get the preference by using:

SharedPreferences settings=getPreferences(0);

Create an editor to edit your Preferences

SharedPreferences.Editor editor=settings.edit();

Set your preference by using put Methods e.g. editor.putBoolean(key,false);

Commit it using editor.commit();


Use additional method if necessary:

remove() to get rid of a single named preference

clear() to get rid of all preferences

commit() to persist your changes made via the editor


Create a Project Named PreferenceDemo

Name the main Activity PreferenceDemoActivity

Edit the main.xml file:


Android Developer

Open PreferenceDemoActivity

Edit it:

public class PreferenceDemoActivity extends Activity {CheckBox chb;}

//Inside onCreate() write some code to close the //application when Button close is clicked//set onclicklistener to close the applicationButton close=(Button)findViewById(R.id.close);

close.setOnClickListener(new OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubfinish();}});

//inside onCreate() write some to code to perform checked change when

//user clicked on checkedButtonchb=(CheckBox)findViewById(R.id.check);chb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stub

if(chb.isChecked()){chb.setText("This checkbox is: checked");}else{

chb.setText("This checkbox is: unchecked");}

}});

@Overrideprotected void onPause() {// TODO Auto-generated method stubsuper.onPause();SharedPreferences settings=getPreferences(0);SharedPreferences.Editor editor=settings.edit();

editor.putBoolean("chb_checked", chb.isChecked());editor.commit();}

@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume();

SharedPreferences settings=getPreferences(0);chb.setChecked(settings.getBoolean("chb_checked", false));}


Finally run your program.

And see the difference


Xml folder

PreferenceActivity



Android Developer

public class TablePreference extends PreferenceActivityimplements OnPreferenceChangeListener {@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);addPreferencesFromResource(R.xml.mytable);}


ListPreference listpreference=(ListPreference)findPreference("tableno");CheckBoxPreferencechkpreference=(CheckBoxPreference)findPreference("chekboxsum");EditTextPreference editpreference=(EditTextPreference)findPreference("editTextPref");RingtonePreferenceringtpreference=(RingtonePreference)findPreference("ringtonePref");

listpreference.setOnPreferenceChangeListener(this);chkpreference.setOnPreferenceChangeListener(this);editpreference.setOnPreferenceChangeListener(this);ringpreference.setOnPreferenceChangeListener(this);}

public boolean onPreferenceChange(Preference preference, Object newValue) {// TODO Auto-generated method stubToast.makeText(this, newValue.toString(), Toast.LENGTH_SHORT).show();return true;}}


Introducing SQLite

DDL Statements

Modification Statements

Query Statements

Using SQLite in Android.


SQLite is a powerful Relational Database engine created by Dr. Richard Hipp in 2000.

SQLite can be found in the Apple iPhone, Symbian phones, Mozilla Firefox, Skype, PHP, Adobe AIR, Mac OS X, Solaris, and many other places.


It is well Regarded, being:

Open Source

Standard-Complaint

Lightweight

Single-tier


Three reason for its popularity:

It's free

It's small

It require no setup or Administration


Data Definition Language(DDL) Statement is used to define tables and columns names....

create table contactlist (_id integer primary key autoincrement,nametext,mob text not null,emailtext,address text);


create table contactlist (_id integer primary key autoincrement,name text,mob text not null,email text,address text);

_id name mob email address

Primary Key


SQL provides number of statement that let you perform CRUD operation . like create,retrive, update and delete of operation in the database....

For example:update contactlist set name=ashish where id=1;


update contactlist set name=ashish where id=1;


1 ashish 9039176xxx

[email protected]

n

228/B trade center indore

Auto Generated value....


SQL provides number of statement that let you perform CRUD operation . like create,retrive, update and delete of operation in the database....

For example:select * from table where _id=1;


select * from table where _id=1;


1 girish 9039176xxx [email protected]

228/B trade center indore

1;girish;9039176xxx;[email protected];228/B trade center indore


Content Values

Using the SQLiteOpenHelper

ContactClass

Inserting Row in contactlist table

Retrieving from contactlist table

Updating contactlist table

Deleting from contactlist table


This class is used to store values.

Each Content Values object represents a single row, as a map of column names to values.

Queries in Android are returned as Cursor objects.


The Cursor class includes several functions to navigate query results including, but not limited to, the following:

moveToFirst

moveToNext

moveToPrevious

getCount

getColumnIndexOrThrow

getColumnName

getColumnNames

moveToPosition

getPosition


SQLiteOpenHelper is an abstract class that help us to perform CRUD operation for database.


SQLiteOpenHelper

SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version);

SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler)

onCreate(SQLiteDatabase db)

onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)

getReadableDatabase()

getWritableDatabase()

onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion)

onOpen(SQLiteDatabase db)


public static final String DB_NAME="contact.db";

public static final int DB_VERSION=1;

public static final String DB_TABLE="contactlist";

////creating column

public static final String NAME="name";

public static final String PHONE_NO="mob";

public static final String EMAIL="email";

public static final String ADDRESS="address";


"create table " +

"" +DB_TABLE+" (_id integer primary key autoincrement," +

""+NAME+" text," + ""+PHONE_NO+" text not null," +

""+EMAIL+" text,"+ADDRESS+" text);";


public ContactClass(Context context) {

super(context, DB_NAME, null, DB_VERSION);

// TODO Auto-generated constructor stub

}


@Override

public void onCreate(SQLiteDatabase db) {


db.execSQL(DATABASE_CREATE);

}

@Override

public void onUpgrade(SQLiteDatabase db, int arg1, intarg2) {


db.execSQL("drop table if exists "+DB_TABLE);

}


ContactClass ccdatabase=new ContactClass(this);

SQLiteDatabasesd=ccdatabase.getWritableDatabase();

ContentValues cv=new ContentValues();

cv.put(key, value);

sd.insert(table, colname, contentvalues);

sd.close();


ContactClass ccdatabase=new ContactClass(this);



cv.put(ccdatabase.NAME, name.getText().toString());

cv.put(ccdatabase.PHONE_NO, mobileno.getText().toString());

cv.put(ccdatabase.EMAIL, email.getText().toString());

cv.put(ccdatabase.ADDRESS, address.getText().toString());

//

sd.insert(ccdatabase.DB_TABLE, ccdatabase.NAME, cv);

sd.close();


Cursor c=sd.query

(table,

Columns,

where,

selectionArgs,

groupBy,

having,

OrderBy);


Table :- eg: ccdatabase.DB_TABLE

Columns :- null for all or _id,name for specific

Where :- String where = _id + = + requiredValue;

whereArgs :- String whereArgs[]={_id=1,name='girish'};

GroupBy :-use here group by statement of sql

Having :- put here having query

OrderBy :-String orderBy = name;


Cursor c=sd.query(ccdatabase.DB_TABLE, null, null, null, null, null, null);

while(c.moveToNext()){

mylist.add(c.getString(0)+";"+c.getString(1)+";"+c.getString(2)+";"+c.getString(3)+";"+c.getString(4));

}

c.close();



if(!(editname.getText().toString().equals("")))

cv.put(ccdatabase.NAME, editname.getText().toString());

if((editmobile.getText().toString().equals("")))

Toast.makeText(this, "mobile no cannot updated", Toast.LENGTH_SHORT).show();

else

cv.put(ccdatabase.PHONE_NO, editmobile.getText().toString());

if(!(editemail.getText().toString().equals("")))

cv.put(ccdatabase.EMAIL, editemail.getText().toString());

if(!(editaddress.getText().toString().equals("")))

cv.put(ccdatabase.ADDRESS, editaddress.getText().toString());

String where="_id="+editid.getText().toString();

sd.update(ccdatabase.DB_TABLE, cv, where, null);

sd.close();



String where="_id="+_id;

sd.delete(ccdatabase.DB_TABLE, where, null);

sd.close();



Android Developer & Trainer


Introduction

Playing Audio Content

Playing Video Content

Audio Recording

Image Capture


android.media

Web

asset

Secure Digital Card (SD) Card

Codex: 3GPP

MP3

MIDI

PCM/WAVE

MPEG-4

http://developer.android.com/guide/appendix/media-formats.html


android.media.MediaPlayer

playAudio()

KillMedia()


android.media.MediaPlayer : MediaPlayerclass can be used to control playback of audio/video files and streams.

Some Important methods :

reset(), setDataSource(), prepare(), start(), seekTo(), pause(), getCurrentPosition(), isLooping(), isPlaying(), release(), seekTo()


MediaPlayer (constructing)

MediaPlayer mediaPlayer=MediaPlayer.create(context, resid);

e.g.MediaPlayer mediaPlayer=

MediaPlayer.create(this, R.raw.song1);

MediaPlayer mediaPlayer=new MediaPlayer();

e.g.MediaPlayer mediaPlayer=

new MediaPlayer();


MediaPlayer (setting Data source)

String path=/sdcard/mysong.mp3;mediaPlayer.setDataSource(path);

MediaPlayer (prepare for media)

mediaPlayer.prepare();

MediaPlayer (start media)

mediaPlayer.start();


MediaPlayer (Seek to Position)

mediaPlayer.seekTo(0); // supply int value

MediaPlayer (Pause media)

mediaPlayer.pause();

MediaPlayer (find current Position)

int currentposition=mediaPlayer.getCurrentPosition();


MediaPlayer (find media is playing or not)

mediaPlayer.isPlaying(); // supply int value

MediaPlayer (if everything done release media)

mediaPlayer.release();


public void playAudio() throws Exception{KillMediaPlayer();

mediaPlayer=new MediaPlayer();mediaPlayer.setDataSource(AUDIO_PATH);mediaPlayer.prepare();mediaPlayer.start();

}


public void killMediaPlayer(){try{if(mediaPlayer!=null){

mediaPlayer.release();}}catch(Exception e){

}}


final String AUDIO_PATH="/sdcard/Cuppycake_Song_.mp3";

MediaPlayer mediaPlayer;int loopback=0;


super.onCreate(savedInstanceState);setContentView(R.layout.main);//retrive all button from xmlButton playbtn=(Button)findViewById(R.id.buttonstart);Button restartbtn=(Button)findViewById(R.id.buttonrestart);Button pausebtn=(Button)findViewById(R.id.buttonpause);

...........................................

}


playbtn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {// TODO Auto-generated method stubtry {

playAudio();} catch (Exception e) {

// TODO Auto-generated catch blocke.printStackTrace();

}}

});


pausebtn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {// TODO Auto-generated method stub

loopback=mediaPlayer.getCurrentPosition();mediaPlayer.pause();

}});


restartbtn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {// TODO Auto-generated method stub

mediaPlayer.seekTo(loopback);mediaPlayer.start();

}});


android.widget.VideoView

android.widget.MediaController


android.widget.VideoView

Displays a video file. The VideoView class can loadimages from various sources (such as resources or contentproviders), takes care of computing its measurement fromthe video so that it can be used in any layout manager, andprovides various display options such as scaling and tinting.

Important methods:setMediaController(MediaController);setVideoPath(VIDEO_PATH);requestFocus();start();


A view containing controls for aMediaPlayer.Contains buttons like Play/Pause Rewind Fast Forward Progress slider

android.widget.MediaController


VideoView videoView=(VideoView)findViewById(R.id.videoView1);MediaController mc=new MediaController(this);mc.setBackgroundDrawable(getWallpaper());videoView.setMediaController(mc);videoView.setVideoPath("/sdcard/320474911302296_31015.mp4");videoView.requestFocus();videoView.start();


android.provider.MediaStore.RECORD_SOUND

startRecording();

onActivityResult();


android.provider.MediaStore.RECORD_SOUNDpublic void startRecording(){

Intent intent=new Intent("android.provider.MediaStore.RECORD_SOUND");startActivityForResult(intent, 0);

}


android.provider.MediaStore.RECORD_SOUND

@Overrideprotected void onActivityResult(int requestCode,

int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);switch(requestCode){case 0:

if(resultCode== RESULT_OK){Uri recordedAudioPath=data.getData();

}}}


public void captureImage(View view){ContentValues values=new ContentValues();values.put(Media.TITLE, "My demo Image");values.put(Media.DESCRIPTION,

"Image capture by Camera via an Intent");

myPicture=getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, values);

Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

intent.putExtra(MediaStore.EXTRA_OUTPUT, myPicture);startActivityForResult(intent, 0);

}


@Override

protected void onActivityResult(int

requestCode, int resultCode, Intent data) {


super.onActivityResult(requestCode,

resultCode, data);

if(requestCode==0 && resultCode==

Activity.RESULT_OK){

}

} Er. Girish Kumar ShakyaAndroid Developer

android ppt

Documents