Difference Between Pending Intent And Intent in Android

                    

  Normal Intent 

    Normal Intent will die as soon as the app being killed.

   An Android Intent is an object carrying an intent, i.e a message from one Component to another 

   Component either inside or outside of the application.Intent can communicate message among 

   any of the three core Components of an application -- Activities, Services,and BroadcastReceivers.
 
  Two types of Intent in Android
  1. Explicit Intent.
  2.Implicit Intent

 Explicit Intent is an Intent which is used to Call the another component Explicitly in your application
 Like :We are calling  Next activity on button click of First activity using Intent

Example 

// Explicit Intent by specifying its class name
   Intent i = new Intent(this, TargetActivity.class);
   i.putExtra("Key1", "ABC");
   i.putExtra("Key2", "123");

// Starts TargetActivity
   startActivity(i);

 Implicit Intent Intent is use to call Intent with in the Single Acticity
 Like:- We are calling Webpage in your Activity
Example

// Implicit Intent by specifying a URI
   Intent i = new Intent(Intent.ACTION_VIEW, 
   Uri.parse("http://www.example.com"));

// Starts Implicit Activity
   startActivity(i); 

Pending intents

   Pending Intents never die .They will be alive as long as it needed by Alarm  Service, Location         

  Service or any other Services.
  A pending intent is a token that you give to another application.For example, the notification   
 manager, alarm manger or the other 3rd party applications). This allows the other application to  
 restore the permissions of your application to execute a predefined piece of code.

 The meaning of Pending intent is that ,you can handle it to other Application that later can be use it 
 as Youself.

 Example 

Calendar cal = Calendar.getInstance();
Intent intent = new Intent(this, MyService.class);
PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);