Android : requestLocationUpdates crashes App

As the title says, my app crashes when I want to call requestLocationUpdates. Right now I just want to outpot a Log-Message when the Location is Updated, to see how fast that happens.

MainActivity

private TextView textViewCurrentLocation;
LocationManager mLocationManager;

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

    textViewCurrentLocation = (TextView) findViewById(R.id.textViewLocation);

    mLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    // Define a listener that responds to location updates
    LocationListener mlocationListener = new LocationListener() {

        public void onProviderEnabled(String provider) {
        }

        public void onProviderDisabled(String provider) {
        }

        @Override
        public void onLocationChanged(Location location) {
            Log.i("MainActivity", "onLocationChanged");
        }

        @Override
        public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
        }
    };

    // Register the listener with the Location Manager to receive location
    // updates
    mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
            mlocationListener);
    mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
            mlocationListener);
}

Manifest

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

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />


    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />


    <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>
</manifest>