Android 配置 之 AndroidManifest.xml 出错 Unable to instantiate activity ComponentInfo

04-08 18:17:48.468: ERROR/AndroidRuntime(20955): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example/com.example.demo.GestureEvent}: java.lang.ClassNotFoundException: com.example.demo.GestureEvent in loader dalvik.system.PathClassLoader@4485c9a8

04-08 18:17:48.468: ERROR/AndroidRuntime(20955):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2497)

(ZygoteInit.java:618)

.............

 

============================

 

响应的配置文件

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="7" />

    <application android:icon="@drawable/icon" android:label="helloworld">
        <activity android:name=".demo.GestureEvent">//error
<activity android:name="com.android.demo.GestureEvent">//right

            <intent-filter>
                <action android:name="android.intent.action.MAIN"></action>
                <category android:name="android.intent.category.LAUNCHER"></category>
            </intent-filter>
        </activity>
    </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="7" /> <application android:icon="@drawable/icon" android:label="helloworld"> <activity android:name=".demo.GestureEvent">//error <activity android:name="com.android.demo.GestureEvent">//right <intent-filter> <action android:name="android.intent.action.MAIN"></action> <category android:name="android.intent.category.LAUNCHER"></category> </intent-filter> </activity> </application> </manifest>

 

关键代码

<activity android:name=".demo.GestureEvent">

 

对于 action 为MAIN  且 category 为LAUNCHER 的

且 与所指定的 package="com.example" 不一致的activity  来说

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android:name 需要配置成 全路径

<activity android:name="com.android.demo.GestureEvent">

 

 

否则将会抛出如上异常