I have Android device, but there is no Market or any file explorer application. How can I install APK file?
I have a idea, to have APK on SD card which will be run when SD card will be inserted in. Something like AUTORUN function.
How can do AUTORUN? Or any other suggestion?

[RiseOfTheDropBears]

1. Get the drivers for your device working so you can connect it to the computer and get it recognized.
2. Download and extract the zipped Android SDK from Google. Preferably extract it into a folder like C:\adb or something short.
3. Extract the apps you want installed into the same folder.
4. Open up the Command Prompt and go to the folder... By typing in "cd \adb" if you put it there like I suggested.
5. Enter "adb devices". You should see a device listed. Else you didn't install the driver right after all, return to step 1.
6. Enter "adb install myapp.apk" to install an app to your phone, substituting the name of your app in there.

That's it. Repeat the adb install command for every app you want on your device.

Another way as some others have suggested is to use dropbox...
Just download any apks you want and put it in your dropbox.
Then sync with your phone....

And to get the dropbox apk into your phone in the first place.... well... you could ask a friend to bluetooth transfer to you from his phone or computer, or to use primetech's suggestion

You have no market? You must be using a custom rom then. Cynagon Mod roms do not come with the google apps(gapps) installed due to legal concerns. You can download them from here though:
http://goo-inside.me/google-apps/
Downlaod the zip. Put it on your sd card, and flash it using something like clockwork recovery.

You have no market? You must be using a custom rom then. Cynagon Mod roms do not come with the google apps(gapps) installed due to legal concerns. You can download them from here though:
http://goo-inside.me/google-apps/
Downlaod the zip. Put it on your sd card, and flash it using something like clockwork recovery.

Hmm... He may not be using a custom rom... I think some android phones do not come with the market installed in some countries...