AndroidManifest.xml

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

    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
	<uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <service android:name=".PlayerService"/>

        <activity
            android:name=".PlayerActivity"
            android:label="@string/app_name"
            android:launchMode="singleTop">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity
            android:name=".CollectionActivity"
            android:label="@string/app_name">
            <intent-filter>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity android:name=".LyricsActivity">
        </activity>

	    <receiver android:name="com.example.gonza.widget.Widget" >
		    <intent-filter>
			    <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
		    </intent-filter>
		    <meta-data android:name="android.appwidget.provider"
		               android:resource="@xml/widget_info" />
	    </receiver>

    </application>

</manifest>