[2014-02-28 02:31:54 - Android SDK] Warning when loading the SDK:

Warning: Ignoring add-on 'addon-google_apis-google-19': Unable to find base platform with API level '19'
Warning: Ignoring add-on 'addon-google_apis_x86-google-19': Unable to find base platform with API level '19'
[2014-02-28 02:32:14 - Dex Loader] Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.
[2014-02-28 02:32:14 - HelloWorld] Conversion to Dalvik format failed: Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.
[2014-02-28 02:33:06 - HelloWorld] Dx
trouble writing output: already prepared
[2014-02-28 02:33:08 - HelloWorld] ------------------------------
[2014-02-28 02:33:08 - HelloWorld] Android Launch!
[2014-02-28 02:33:08 - HelloWorld] adb is running normally.
[2014-02-28 02:33:08 - HelloWorld] Performing org.HelloWorld.game.HelloWorld activity launch
[2014-02-28 02:33:08 - HelloWorld] Automatic Target Mode: launching new emulator with compatible AVD 'AVD_for_2_7in_QVGA'
[2014-02-28 02:33:08 - HelloWorld] Launching a new emulator with Virtual Device 'AVD_for_2_7in_QVGA'
[2014-02-28 02:33:13 - HelloWorld] New emulator found: emulator-5554
[2014-02-28 02:33:13 - HelloWorld] Waiting for HOME ('android.process.acore') to be launched...
[2014-02-28 02:33:38 - HelloWorld] HOME is up on device 'emulator-5554'
[2014-02-28 02:33:38 - HelloWorld] Uploading HelloWorld.apk onto device 'emulator-5554'
[2014-02-28 02:33:39 - HelloWorld] Installing HelloWorld.apk...
[2014-02-28 02:34:03 - HelloWorld] Success!
[2014-02-28 02:34:04 - HelloWorld] Starting activity org.HelloWorld.game.HelloWorld on device emulator-5554
[2014-02-28 02:34:05 - HelloWorld] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=org.HelloWorld.game/.HelloWorld }

在ADT下的过程是这样的，但是模拟器上没有显示出来，生成apk文件也用不了，求大神帮助