android app wont launch in my device

Question

I am having a Sony Xperia SP and i want to test the app against the device. Everything is perfect, got the adb installed and eclipse shows the device in the device chooser. but it shows a question mark symbol in the target field and i cant figure out what it is!

still, if i kick start the app on the device it hangs and the error log has some entries that i cant understand.. I am stuck with this for few hours now and its on my nerves already. your help will be great deed, thanks :)

these are the last few entries in the log cat

12-16 20:31:31.210: I/ethernet(2166): Loading ethernet jni class
12-16 20:31:31.250: D/AndroidRuntime(2166): Calling main entry com.android.commands.am.Am
12-16 20:31:34.340: D/AndroidRuntime(2181): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
12-16 20:31:34.340: D/AndroidRuntime(2181): CheckJNI is OFF
12-16 20:31:34.480: I/ethernet(2181): Loading ethernet jni class
12-16 20:31:34.530: D/AndroidRuntime(2181): Calling main entry com.android.commands.am.Am
12-16 20:31:37.610: D/AndroidRuntime(2194): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
12-16 20:31:37.610: D/AndroidRuntime(2194): CheckJNI is OFF
12-16 20:31:37.760: I/ethernet(2194): Loading ethernet jni class
12-16 20:31:37.800: D/AndroidRuntime(2194): Calling main entry com.android.commands.am.Am

Stuck at this point!

Post the logcat with the entries that you can't understand and maybe someone can. Also, make sure that you have selected "Allow third party apps" in your settings. — codeMagic, Dec 16 '13 at 20:21
i cant post the logcat cos i dont have enough reputations, i am new to this site! but the last entry says "calling main entry com.android.commands.am.Am" and its stuck there! and yeah i have checked "unknown sources" already! thanks @codeMagic — user3105014, Dec 16 '13 at 20:25
You can post logcat regardless of rep. Just edit your post and copy/paste the error log. — codeMagic, Dec 16 '13 at 20:29
does the app start and crash, or just hangs on a black screen ? — TootsieRockNRoll, Dec 16 '13 at 20:29
may be the device does'nt has the minimum requirements for the app :/ — Rachit Mishra, Dec 16 '13 at 21:27

score 0 · Answer 1 · answered Dec 16 '13 at 20:50

0

Sounds like you may have a problem uploading the app to the device and/or connecting the android debugger:

Check if you can even connect to the device

You may be missing the Google USB driver, or perhaps a driver specific to your device used for USB connectivity to your PC:

http://developer.android.com/sdk/win-usb.html

Debugging on a physical device

http://developer.android.com/tools/device.html

answered Dec 16 '13 at 20:50

Mike Marshall

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oh i did! the device is connected and i could see the entry in command promt when i execute the command adb devices! – user3105014 Dec 16 '13 at 20:55

android app wont launch in my device

1 Answers1