Question

Android 开发Helloworld 问题：Failed to install Helloandroid.apk on device 'emulator-5554!

Eclipse提示：
[2010-10-13 18:44:28 - Helloandroid] Android Launch!
[2010-10-13 18:44:28 - Helloandroid] adb is running normally.
[2010-10-13 18:44:28 - Helloandroid] Performing com.example.android.apis.ApiDemos activity launch
[2010-10-13 18:44:28 - Helloandroid] Automatic Target Mode: Preferred AVD 'myphone' is available on emulator 'emulator-5554'
[2010-10-13 18:44:28 - Helloandroid] WARNING: Application does not specify an API level requirement!
[2010-10-13 18:44:28 - Helloandroid] Device API version is 8 (Android 2.2)
[2010-10-13 18:44:28 - Helloandroid] Uploading Helloandroid.apk onto device 'emulator-5554'
[2010-10-13 18:44:28 - Helloandroid] Installing Helloandroid.apk...
[2010-10-13 18:46:43 - Helloandroid] Failed to install Helloandroid.apk on device 'emulator-5554!
[2010-10-13 18:46:43 - Helloandroid] (null)
[2010-10-13 18:46:45 - Helloandroid] Launch canceled!
怎么办？谢谢

Answer 1

删除对应的模拟器下的后缀为.lock的文件夹，这个就是说apk文件没法建立。

Answer 2

你这个信息怎么看啊，你把logcat中打印的贴出来看看
这个不好判断啊

Answer 3

2010-10-13 18:46:43 - Helloandroid] (null)
你的程序里面出了个null