Installation error: Unknown failure

Question

I just opened a new Android project thorugh eclipse, I want the application to run on my samsung galaxy s4 which has KitKat 4.4.2 on it, so I opened the project so as Target SDK is 5.0.1 and the compilation will be done with 4.4.2, just when the project opens I get errors, i fixed it by accesing both appcompat and the projects project.properties and changing the target to apk-21. the errors vanish. But ! when I try to debug with my phone or with the emulator it fails, - Installation error: Unknown failure - thats the error, as I looked through the web I saw many people that get through this problem and non of the solutions was posted solved my problem. I will be really glad if someone could help me solve this annoying thing. Thank! !

Answer 1

I had the similar kind of issue and I have resolved the issue following the steps below:

1. File >> Settings >> Build, Execution, Deployment.

2. Next click on Instant Run and uncheck "Enable Instant Run to hot swap code/resource changes on deploy".

3. Apply and OK.

Try building the app again now. It should work now. Enable the Instant Run feature again if you want to.