android activity入口指定与更改（即启动acitivity的设置与更换）

为了测试每个Activity的显示效果是否达成要求，想直接启动就显示新设计的Activity，就需要更改Android程序的入口Activity，主要修改文件即可，

原如下：
<manifest package=""
    android:versionCode="1"
    android:versionName="1.0" xmlns:andro>

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >     
         <activity
            android:name=".RelativeActivity"
            android:label="@string/title_activity_relative" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity> 
        <activity
            android:name=".FrameActivity"
            android:label="@string/title_activity_frame" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity>
      
    </application>

</manifest>

此时 RelativeActivity为启动界面。
要修改.FrameActivity为启动界面，只需要将.FrameActivity往前放即可，结果如下：

<manifest package=""
    android:versionCode="1"
    android:versionName="1.0" xmlns:andro>

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" > 
        <activity
            android:name=".FrameActivity"
            android:label="@string/title_activity_frame" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity>   
        <activity
            android:name=".RelativeActivity"
            android:label="@string/title_activity_relative" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity>     
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="" />

                <category android:name="" />
            </intent-filter>
        </activity>      
    </application>

</manifest>

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