Launcher Activity is opening twice in my new SDK

I am recently facing a problem while creating new android application in both eclipse as well as android studio. I am using same SDK in both eclipse and android studio.

When I create a new application and i simply run it. The launcher activity was getting loaded twice. Means, I am getting MainActivity loading twice one on top of another. OnCreate() method of my MainActivity also got invoked twice.

The code goes like follows

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="21"
    android:targetSdkVersion="22" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

MainActivity.java

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    System.out.println("OnCreate Invoked");
}
}

Output

OnCreate Invoked
OnCreate Invoked

Can you please help me in resolving this issue. Thanks in advance.

It seems you are getting multiple instance of your first activity.

Use this in manifest of 1st activity:

android:launchMode="singleTop"