Android java.net.UnknownHostException: Host is unresolved

Question

This code doesn't work:

URL         url   = new URL( xmlPath ); InputSource input = new InputSource( url.openStream() ); 

all the time, resulting in an UnknownHostException, even when the host exists, has been hit successfully using the same code if from a different development host (machine), and also from a browser.

I'm probably out of line asking this question again, a repeat of Android java.net.UnknownHostException: Host is unresolved (strategy question). The forum software would not allow me to comment on the unsatisfactory answer to that question (in order to solicit more attention to the solution I ultimately found). Perhaps I'm not popular enough yet to be given that privilege. In the meantime, I'm essentially re-posting the question and a different answer.

Basically, I accept that maybe the Android device has a hard time with DNS under certain circumstances, but I've tried, for example the anddev.org example of how to use the SAX parser, and it worked on one machine I have and not on another.

Edit: As noted, I know a working answer and will post it.

I am a) asking a question (that's already been asked and unsuccessfully answered) and b) answering it for the benefit of those for whom my answer will be useful.

Answer 1

The answer is devilishly simple: remove, then re-create your AVD (virtual device/emulator) in Eclipse. It worked for me--first time.

Answer 2

I been follow the steps above but still try no luck, finally i just realize my app did not allow to go outside internet in the emulator. So just add users permissions in your manifest file. Done! Thanks to jozsi see http://www.helloandroid.com/tutorials/how-download-fileimage-url-your-device

1. android.permission.INTERNET
2. android.permission.ACCESS_NETWORK_STATE
3. android.permission.READ_PHONE_STATE