AndroidAVD启动后，直接显示手机界面，不显示HelloWorld，求教！！

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package com.example.android.apis;
import android.app.Activity;
import android.os.Bundle;

public class ApiDemos extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

Eclipse控制台的信息：
[2011-04-25 16:57:33 - Androidtest] ------------------------------
[2011-04-25 16:57:33 - Androidtest] Android Launch!
[2011-04-25 16:57:33 - Androidtest] adb is running normally.
[2011-04-25 16:57:33 - Androidtest] Performing com.example.android.apis.ApiDemos activity launch
[2011-04-25 16:57:33 - Androidtest] Automatic Target Mode: launching new emulator with compatible AVD 'SDK2.2'
[2011-04-25 16:57:33 - Androidtest] Launching a new emulator with Virtual Device 'SDK2.2'
[2011-04-25 16:57:35 - Androidtest] New emulator found: emulator-5554
[2011-04-25 16:57:35 - Androidtest] Waiting for HOME ('android.process.acore') to be launched...
[2011-04-25 16:58:08 - Androidtest] WARNING: Application does not specify an API level requirement!
[2011-04-25 16:58:08 - Androidtest] Device API version is 8 (Android 2.2)
[2011-04-25 16:58:08 - Androidtest] HOME is up on device 'emulator-5554'
[2011-04-25 16:58:08 - Androidtest] Uploading Androidtest.apk onto device 'emulator-5554'
[2011-04-25 16:58:08 - Androidtest] Installing Androidtest.apk...
[2011-04-25 16:58:48 - Androidtest] Re-installation failed due to different application signatures.
[2011-04-25 16:58:48 - Androidtest] You must perform a full uninstall of the application. WARNING: This will remove the application data!
[2011-04-25 16:58:48 - Androidtest] Please execute 'adb uninstall com.example.android.apis' in a shell.
[2011-04-25 16:58:49 - Androidtest] Launch canceled!

启动模拟器后，直接进入手机界面，不显示HelloWorld！

[儿大不由爷]

apk没有安装成功,先卸载之前的版本. Log给出的信息已经很详细了

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前辈具体说说...小弟菜鸟

[javasoldiers]

在简单的方法，把现有的模拟器删掉，重新建立一个。呵呵

[中才德创]

Please execute 'adb uninstall com.example.android.apis' in a shell.
Androidtest] Launch canceled!

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模拟器重新创建了还是行啊！求教！

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我先卸载试试！

[mendax]

1. 检查当前项目的Android SDK platform版本配置是否正确，确保与AVD的一致；
2. 完全卸载AVD上已经安装的版本
在命令行中执行adb uninstall com.example.android.apis，其中com.example.android.apis为要卸载的应用程序的名称。
( 执行命令之前，请确保Adnroid SDK tools目录已添加入path环境变量
我的电脑-> 属性 -> 高级 -> 环境变量 -> 系统变量， 在path变量中添加Adnroid SDK tools的路径，保存即可。
）

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我试试！

[passself]

已经有答案了

[AngerCode]

谢谢大家了，可以显示了！就是有点慢！确实是apk的问题！感谢大家啊！