android app

android app

1. forehand

   • the user interface
   • xml
   • res
     • drawable
       • images accessed from R.drawable class
     • layout
       • user interface R.layout
     • values
       • stores all the values of these: array,integers ,bools,colors,dimen,string,style
     • EditText
       • Passwords
     • TextView
       • anim
         • it defines the property animations and can be accessed from R.anim class
       • color
         • accessed from R.color class

2. backhand

   • the coding in basically java
   • java
   • src
     • codes
     • package name
       • the name of the package
       • java files
         • all the java files which include all the methods and objects and classes..
         • Activity
           • onCreate
             • the first call back and called when the activity is first created
           • onStart
             • this callback is called when the activity is  visible to the user.
           • onPause
             • The paused activity does not receive user input and cannot execute any code and called when the current activity is being paused and the previous activity is being resumed.
           • onResume
           • onStop
             • called when the activity is no longer visible
           • onDestroy
             • called before the activity is destroyed by the system
           • onRestart
             • called when the activity restart after stopping it
         • threads
           • try
             • sleep(milliseconds)
           • catch
             • InterruptedException name name.printStackTrace();
           • finally
         • lists
           • ListActivity
             • extends ListActivity
             • onListItem
               • Class
               • Intent
               • startActivity
             • onCreate
               • setListAdapter();

3. gen

   • r.java
     • file that connects the forehand and the backhand

4. android manifest

   • connects the android app and the os
   • android os
     • the operating system of the andriod