The problem you are facing is due to the fact that you have exported an unsigned application
, which is not intended for distribution purposes.
Try Exporting a signed application package, by following one of the following steps :
- "
Right click project -> Export -> Export Android Application
"
- "
Right click project -> Android Tools -> Export Signed Application Package
"
Both of the above methods will export a signed application file
, used for distribution purposes.
You may also test your app on a real device by just connecting your device to the testing machine via a USB cable and then following step below :
Right Click on your Project root
-> Go to Run As
-> Select Android Application
-> Now a popup is shown with all the active devices
-> Select your device
from the list
**
Newbie Guide to Export Signed Application and configuring keystore file in Eclipse :
- "
Right click project -> Android Tools -> Export Signed Application Package
"
- A popup as shown below would appear, if your project won't contains any erros :

- Click
Next
- On clicking Next, you'll get a screen as shown below :

5.On this screen, make sure Create new keystore
is checked.
6.Browse
to the location, you want to create a new keystore
at, and also add a password to access it later.
7.Then Click Next
8.On clicking next you'll get a screen as shown below :

9.Fill all the fields in this screen, (ONLY first five are mandatory), In validity fill the number of years this key would be valid for, then click Next
.
10.On clicking Next you'll get a screen as shown below :

11.Browse to the location you want to keep for apk file in, and Click Finish
, and you are done!
Hope this helps!