I needed to download files from the Internet.
Therefore I Googled the "Android download manager" and found the following example:
I copied them into a new ADT DownloadManager project.
Some errors appeared:
-import com.google.gson.Gson error
Some library was missing.
Again, googled Jason and downloaded google-gson-2.2.2-release,
and included it in the Java Build Path Library of DownloadManager Project.
Rebuilt project. Error showed:
-DownloadManager.Request API level error, minimum 9
I changed android:minSdkVersion from 8 to 9 in the AandriodManifest.xml file.
And clicked "Debug As". More error on this point:
-request.setDestinationInExternalFilesDir error, Unable to create external files directory - ANDROID
I started Android Virtual Device Manager and set SD Card Size to 100 MB, restarted simulator.
No more errors!