Android Manifest mismatched tag

i've been trying to open an existing Android project but i get an error on its Android Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://ift.tt/nIICcg"
package="com.one.piano"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
    android:minSdkVersion="9"
    android:targetSdkVersion="17" />

<application

    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.evilduck.piano.PianoDemoActivity"
        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>

The error is:

Error:(25, -1) Android Resource Packaging: [custom_view_keyboard-master] C:\Users\user\Desktop\oneapp.idea\AndroidManifest.xml:25: error: Error parsing XML: mismatched tag

which seems to be on the last "activity" on the previous line of the last.

Any ideas?