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I Build apk of my android project. Apk also build successfully. but when i try to install apk in my phone its not installing and showing error.?

This file does not have an app associated with it for performing this action. please install an app or, if one is already installed, create an association in the default apps setting page android studio build Apk this file does not have an app associated with it for performing this action. please install an app or, if one is already installed, create an association in the default apps setting page.

Make sure that your instant run is enable or not? If so then i had similar experience and i solved by disable instant run as follows.

If you are sure that the apk is build, check whether the file is having the apk extension (appname .apk ).
Better way is to let Android Studio install it for you instead of building apk and manually installing it:
Enable 'USB debugging' from you phones 'Developers Options' .
Connect your Phone to your PC and Click on 'Run' app option in Android Studio.
Select your device from the popup window.
If there is any already installed app, or any internal errors, Android Studio will take care of it.

AndroidManifest is missing although it exists

I compile my android application
everything pass OK
but when I try to debug my application on the mobile device (using eclipse) I get an error:
AndroidManifest is missing
this is strange as the file exist, and complication passes

For all developers who face this problem :
1. Click on your project -> Refresh (F5)
2. Go to "Project" in the menu bar -> Clean (and clean the project)
3. If all else fails, restart eclipse

Emulator not showing the updated output after making the changes in the code

Yesterday i updated eclipse and sdk, and now have made some changes to the code but not able to see the changes made in emulator when i run it.
These are the things i have tried by googling:
restarted eclipse and avd
clean the project
checked whether all the options are checked under project
properties->builders.
Checked whether all the options are checked under
windows->preferences->android->build
When I tried to test it on device, I was not able to export, but got "No Build Tools installed in the sdk".
So I installed the tools in the sdk, but I still could not get updated output.
Can anyone help me out?

Are you sure the latest apk is getting installed on the device? There are some instances where it will not overwrite an installed apk. For example if your build-signing key has changed recently. Try uninstalling the app fully from the device first, and try again.

Go to device manager edit device virtually created by you or system ..you will find one check box saying enable snaps shot. check mark it. it will work..

Eclipse doesn't start android app in emulator

I'm right at the beginning of android programming.
I created an AVD that works just fine when launching via the AVD-manager.
I also "created" a hello-world app as a little test.
When I try to run the app as an android app, nothing happens. No output in the console, emulator doesn't start (or launchs app when already started), no message, nothing.
Can anyone help me?
Thanks a lot

I had the same problem. I think its because u created a project with a blank activity. so when the app starts it doesn't have anything to do..
to solve the issue just add an activity, intent and a category to your manifest file and run

Not sure if this will help you but, during our android lab sessions some computers had a slimier problem. How it was fixed is by doing the following:
Next to the "Run as" button, there is a small arrow, click it.
Select "Run configurations".
On the left, double click "Android Application".
There should be 3 tabs appearing on the right (Android, Target, Common)
Under "Android", browse and select the project you want to run.
Launch Action: select "Launch Default Activity".
Click on "Target" tab.
There should be an AVD table with the Android virtual devices you created through the manager. In case there isn't, hit refresh or click on "Manager" to make sure you have created it and then refresh again.
if there is an AVD, it should appear with a small check box on the left side of it, click it and then click on "Run".
This fixed the issue for most students, hopefully it will in your case as well. If not then I hope someone can answer it for you.

If you are using Windows, Give your SDK path in Eclipse as Windows->preferences ->Android->SDK Location
here you give your sdk path.

Android: main.xml error

I'm getting an error when I open my main.xml, I'm not seeing the UI of my app:
Eclipse is loading framework information and the layout library from the SDK folder.
main.xml will refresh automatically once the process is finished.
Do you have fix on it? I tried googling it but nothing worked for me.

It seems yet another Eclipse quirk. There's a solution here:
http://twigstechtips.blogspot.com/2011/02/eclipse-android-development-is-loading.html
And another alternative here:
http://groups.google.com/group/android-developers/browse_thread/thread/065b4e55f0189873

This is caused when you have old jar files in your sdk directory! look here
http://androidbook.blogspot.com/2009/07/when-eclipse-loading-framework.html
if it doesnt solve the issue maybe you can try changing the target to another version of the SDK eg. 2.2 instead of 2.1 to render the view instead

Same thing happened to me couple days ago after updating SDK through android SDK Manager. When I rebooted eclipse, I got a pop-up saying my Android Development Tool (ADT) or a plugin for Eclipse needs update to version 22.6.2
Here is the information http://developer.android.com/tools/sdk/eclipse-adt.html
and click updating ADT, the download instructions are in there.
I copied it out here just in case,
Download the ADT Plugin Start Eclipse, then select Help > Install New Software. Click Add, in the top-right corner. In the Add Repository dialog that appears, enter "ADT Plugin" for the Name and the following URL for the Location: https://dl-ssl.google.com/android/eclipse/ Note: The Android Developer Tools update site requires a secure connection. Make sure the update site URL you enter starts with HTTPS. Click OK. In the Available Software dialog, select the checkbox next to Developer Tools and click Next. In the next window, you'll see a list of the tools to be downloaded. Click Next. Read and accept the license agreements, then click Finish. If you get a security warning saying that the authenticity or validity of the software can't be established, click OK. When the installation completes, restart Eclipse.
It should then work just fine.
Hope this helps.