How to Get the ID of the Device Running Android OS

TelephonyManager is the predefined class that provides information about telephony services on the device. This class contain several methods. You can found complete documentation about this class using the following url

http://developer.android.com/reference/android/telephony/TelephonyManager.html


TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
//Getting Device Id
 tm.getDeviceId();

//Getting the Phone No
tm.getLine1Number();

How to Handle Orientation in Android using OnConfiguration

If you want to perform some operation in the orientation the following code sample will be useful. If you change the orientation then one default method will call i.e onConfigurationChanged()

@Override
 public void onConfigurationChanged(Configuration newConfig)
{
         super.onConfigurationChanged(newConfig);
         if(newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE)
         {           
                  // indicates orientation changed to landscape
         }             
         else if(newConfig.orientation == Configuration.ORIENTATION_PORTRAIT)
         {           
                  // indicates orientation changed to portrait
         }           
}

Note :
We will change the declaration of the Activity in manifast.xml to the following :
<activity android:name=".YourActivity" android:label="@string/app_name" android:configChanges="orientation|keyboardHidden" />

If you want know more information about this plz follow the link :
http://developer.android.com/guide/topics/resources/runtime-changes.html#HandlingTheChange