Android- mailto link won't work

I have read many Questions about this topic here at stackoverflow, also my solution come from here but it won't work. Also there is no error message.

I have a webview in Android and a Homepage, there are some mailto links, when I try to open the mailto links from my webview in a mailclient, the webview always open the mail address like a normal webpage.

Could someone look at my code and tell my what's wrong?

Thank's for your help.

Code:

Manifest file:

1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="http://schemas.android.com/apk/res/android"
3 package="com.example.TEST"
4 android:versionCode="1"
5 android:versionName="1.5" android:installLocation="auto">
6
7 <uses-permission android:name="android.permission.INTERNET" />
8 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
9 <uses-permission android:name="android.permission.ACCESS_GPS" />
10  <uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
11  <uses-permission android:name="android.permission.ACCESS_LOCATION" />
12  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
13
14 <uses-sdk
15 android:minSdkVersion="8"
16 android:targetSdkVersion="17" />
17
18 <application
19 android:allowBackup="true"
20 android:icon="@drawable/ic_launcher"
21 android:label="@string/app_name"
22 android:theme="@style/AppTheme" >
23 <activity
24 android:name="com.example.lauffinderpro.MainActivity"
25 android:label="@string/app_name" >
26 <intent-filter>
27 <action android:name="android.intent.action.MAIN" />
28
29 <category android:name="android.intent.category.LAUNCHER" />
30 </intent-filter>
31 </activity>
32 </application>
33
34</manifest>

main.xml

1<FrameLayout xmlns:android="http://schemas.android.com/apk/res/a