android - Issues in twitter integration using twitter4j -

i newbie twitter integration in android. integrated twitter in android app using tutorial. here faced problems.

1. my app executed ics if removed targetversion manifeast. why?

< uses-sdk android:minsdkversion="8" android:targetsdkversion="15" />

here removed android:targetsdkversion="15" manifeast file.

now, < uses-sdk android:minsdkversion="8" />

2.in developer console of twitter, set callback url of app "https://www.google.co.in/" , trying run app using callback url in our code. after successful signin, should redirects app here redirects callback url(means here google console).

static final string twitter_callback_url = "https://www.google.co.in/";

but here set following callback url in our code it's working fine. why? default callback url in twitter4j. please can me.

static final string twitter_callback_url = "oauth://t4jsample";

manifeast file

< manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.androidhive.twitterconnect"     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk         android:minsdkversion="8"          />      <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <activity             android:name=".mainactivity"             android:label="@string/title_activity_main" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>             <intent-filter>                 <action android:name="android.intent.action.view" />                 <category android:name="android.intent.category.default" />                 <category android:name="android.intent.category.browsable" />                 <data android:scheme="oauth" android:host="t4jsample"/>             </intent-filter>         </activity>     </application>      <!-- permission - internet connect -->     <uses-permission android:name="android.permission.internet" />      <!-- network state permissions -->     <uses-permission android:name="android.permission.access_network_state" />  < /manifest> 

redirecting callback url after authentication normal behavior. please read bit oauth first. call url used pass authorization token requesting application. should assign url inside application can read token , take necessary actions using that. in case of twitter4j, url oauth://t4jsample able handle part. hope clear you.