Android 禁止横竖屏切换

android:screenOrientation="portrait"  --> 只用竖屏

android:configChanges="keyboardHidden|orientation" --> 如此设置当用户横竖屏时不会重启Activity

<application android:label="@string/app_name"
      android:icon="@drawable/icon"
      android:name=".MyApplication">
       <activity android:theme="@style/Theme.Welcome"
       android:label="@string/app_name" 
       android:name=".MainIndexActivity" 
       android:screenOrientation="portrait"
       android:configChanges="keyboardHidden|orientation">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
</application>