arcgis for android

I used arcserver published map services , have also been slicing . Why am I reading the map when using the static method ArcGISTitledMapServiceLayer can not display the map , but with ArcGISDynamicMapServiceLayer can read dynamic maps , solve ah ?
main.xml the code below:
read Dynamic Map : ---------- can achieve -

xmlns: android = "http://schemas.android.com/apk/res/android"
android: id = "@ + id / map" android: layout_width = "fill_parent"
android: layout_height = "fill_parent"
initExtent = "103.65260352265571 30.601990757646366 105.81798514963432 33.15940564749478">

url = "http://192.168.0.109:8399/arcgis/rest/services/mydt/MapServer" />




read ------------ static slice can not be achieved

xmlns: android = "http://schemas.android.com/apk/res/android"
android: id = "@ + id / map" android: layout_width = "fill_parent"
android: layout_height = "fill_parent"
initExtent = "103.65260352265571 30.601990757646366 105.81798514963432 33.15940564749478">

url = "http://192.168.0.109:8399/arcgis/rest/services/mydt/MapServer" />




Please help us to see , ah, ! 1
------ Solution --------------------------------------- -----
com.esri.android.map.ags.ArcGISTitledMapServiceLayer
in Title changed Tile
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initExtent this value is determined by how
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arcgis for android initExtent how to determine this value ??
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the same question initExtent how to determine this value .
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initExtent this value is the initial value of the service