<uses-permission android:name="android.permission.INTERNET" /> 
Activity is an application component that provides a screen with which
users can interact in order to do something, such as dial the phone, take a photo, send an email, or
view a map. Each activity is given a window in which to draw its user interface. <manifest ... >
<application ... >
<activity android:name=".ExampleActivity" />
...
</application ...>
</manifest >
<activity android:name=".ExampleActivity" android:icon="@drawable/app_icon">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
The <action> element specifies that this is the "main" entry point to the application.
The <category> element specifies that this activity should be listed in the
system's application launcher (to allow users to launch this activity).
startActivity(), passing it an Intent that describes the activity you
want to start. The intent specifies either the exact activity you want to start or describes the
type of action you want to performIntent intent = new Intent(this, SignInActivity.class); startActivity(intent);
public class ExampleActivity extends Activity { @Override public voidonCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // The activity is being created. } @Override protected voidonStart(){ super.onStart(); // The activity is about to become visible. } @Override protected voidonResume(){ super.onResume(); // The activity has become visible (it is now "resumed"). } @Override protected voidonPause(){ super.onPause(); // Another activity is taking focus (this activity is about to be "paused"). } @Override protected voidonStop(){ super.onStop(); // The activity is no longer visible (it is now "stopped") } @Override protected voidonDestroy(){ super.onDestroy(); // The activity is about to be destroyed. } }
Android : Introduction
Eclipse Setup for Android Development
Begging With Android
Working With Layouts
Activity
Working With Views
Dialogs In Android
DatePicker and TimePickerDialog
Working With SMS
ListView:
Menus In Android
TelephonyManager
Working With Incoming Calls
Miscellaneous
Storage: Storing Data In Android
Shared Prefferences In Android
Files: File Handling In Android
DataBase : Working With Database
Animation In Android:
| Version | Code name | Release date | API level | |
|---|---|---|---|---|
| 4.2 | Jelly Bean | November 13, 2012 | 17 | |
| 4.1.x | Jelly Bean | July 9, 2012 | 16 | |
| 4.0.x | Ice Cream Sandwich | December 16, 2011 | 15 | |
| 3.2 | Honeycomb | July 15, 2011 | 13 | |
| 3.1 | Honeycomb | May 10, 2011 | 12 | |
| 2.3.3–2.3.7 | Gingerbread | February 9, 2011 | 10 | |
| 2.3–2.3.2 | Gingerbread | December 6, 2010 | 9 | |
| 2.2 | Froyo | May 20, 2010 | 8 | |
| 2.0–2.1 | Eclair | October 26, 2009 | 7 | |
| 1.6 | Donut | September 15, 2009 | 4 |
View to which the context menu should be associated by
calling registerForContextMenu() and pass
it the View. Here we have used Context Menu with ListViewonCreateContextMenu() method
in your Activity onCreateContextMenu()method. This is where you define the menu items, usually by inflating a menu resource. onCreateContextMenu()When the registered view receives a long-click event, the system calls your onCreateContextMenu()
method. @Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
{
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("Select The Action");
menu.add(0, v.getId(), 0, "Call");
menu.add(0, v.getId(), 0, "Send SMS");
} MenuInflater allows you to inflate the context menu from a menu resource 3: Implement onContextItemSelected method
@Override
public boolean onContextItemSelected(MenuItem item)
{
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
// info.position will give the index of selected item intIndexSelected=info.position
if(item.getTitle()=="Call")
{
// Code to execute when clicked on This Item }
else if(item.getTitle()=="Send SMS")
{
// Code to execute when clicked on This Item }
else
{ return false; }
return true;
}