Android-Hello World

Question

I'm currently learning how to create android applications so I started with the basic "Hello World" tutorial over at the Android Developers home page. The code is quite simple but when I run it(I'm using Eclipse and a AVD v2.2), it only shows "Android." It does not go to the Home Screen. I updated everything and I still get the same problem. Is there something I did not or

New errors:

[2010-09-29 09:35:04 - DeviceMonitor]Sending jdwp tracking request failed!

[2010-09-29 09:41:50 - HelloAndroid] Performing com.example.helloandroid.HelloAndroid activity launch
[2010-09-29 10:16:23 - HelloAndroid] Uploading HelloAndroid.apk onto device 'emulator-5554'
[2010-09-29 10:16:28 - HelloAndroid] Installing HelloAndroid.apk...
[2010-09-29 10:20:27 - HelloAndroid] Failed to install HelloAndroid.apk on device 'emulator-5554!
[2010-09-29 10:20:27 - HelloAndroid] (null)
[2010-09-29 10:20:29 - HelloAndroid] Launch canceled!

Solution 1

I assume you are using the emulator. You have to be patient; it takes a very long time to start up (several minutes.) You can start the emulator manually by going to the Window menu in Eclipse, selecting "the Android SDK and ADB manager," clicking on the emulator you created and then clicking on the Start button. Wait until you see the home screen. If necessary, unlock it by clicking and dragging the mouse down over the screen until it's unlocked.

If you have access to a physical phone and USB cable, you will have a much better (faster) experience overall.

Good luck!

Solution 2

I had the same problem and was bugged by it for two days. but this is what worked for me. one you get this error. try running your project (APP) again. it did the trick for me.

I had done everything. digged the web, installed and re-installed everything 4-5 times including the JDK as well. m not sure if it will help in the long run, but it seems to have worked for me.

Solution 3

As for me, I had the same problem and it helped to increase SD volume and max VM app heap size. (Android SDK and AVD manager - Virtual device - Edit) What is interesting, the back change of SD and heap to the previous values is OK, too. That means, that any change of emulator parameters and its rebuilding is enough. (Simple restart won't help)

Definitely, it is cheaper, than total reinstalling. :-)

Solution 4

unlock the screen from the emulator. That did the trick for me.

Solution 5

go to the run configurations and select target tab. under this tab you can see your targets. then select automatically radio button and select a check box of AVD. then try to run, most probably your issue will be solved.

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