when application run on emulator it stays blank and i am using android emulator 2.1 api level 7

Question

• Android Launch!

• WARNING: Application does not specify an API level requirement! -[ Device API version is 7 (Android 2.1-update1) -[ Uploading project.apk onto device 'emulator-5556'

• [ Failed to install project]
• .apk on device 'emulator-5556': An existing connection was forcibly closed by the remote host
• [ java.io.IOException: An existing connection was forcibly closed by the remote host
• [ Launch canceled!
• [ SDK Manager] Warning: Ignoring add-on 'addon_galaxy_tab_samsung_electronics_8': Unable to find base platform with API level '8'
• [- SDK Manager] Warning: Ignoring add-on 'addon_galaxy_tab_samsung_electronics_8-1': Unable to find base platform with API level '8'
• [ SDK Manager] Warning: Ignoring add-on 'addon_google_apis_google_inc_11': Unable to find base platform with API level '11'
• [ SDK Manager] Warning: Ignoring add-on 'google_apis-3': Unable to find base platform with API level '3'
• [- SDK Manager] Warning: Ignoring add-on 'google_apis-4': Unable to find base platform with API level '4'
• [ - SDK Manager] Warning: Ignoring add-on 'google_apis-5_r01': Unable to find base platform with API level '5'
• [ - SDK Manager] Warning: Ignoring add-on 'google_apis-6_r01': Unable to find base platform with API level '6'

Answer 1

WARNING: Application does not specify an API level requirement! - please check your manifest file you didn't write the solution for that like:

<uses-sdk android:minSdkVersion="8" />

It will use to target particular Android version (API Level ) as per your application requirement.

Answer 2

Set the proper minSdkVersion for your app in the

<uses-sdk android:minSdkVersion="integer"/> 

tag of your manifest, where "integer" is the API level of your app.

Read this for more details.