Android基础教程:禁止横屏竖屏切换
Android基础教程:禁止横屏竖屏切换
在Android中要让一个程序的界面始终保持一个方向,不随手机方向转动而变化的办法: 只要在AndroidManifest.xml里面配置一下就可以了。
在AndroidManifest.xml的activity(需要禁止转向的activity)配置中加入android:screenOrientation=”landscape”属性即可(landscape是横向,portrait是纵向)。
另外,android中每次屏幕方向切换时都会重启Activity,所以应该在Activity销毁前保存当前活动的状态,在Activity再次Create的时候载入配置。要避免在转屏时重启activity,可以通过在androidmanifest.xml文件中重新定义方向(给每个activity加上android:configChanges=”keyboardHidden|orientation”属性),并根据Activity的重写onConfigurationChanged(Configuration newConfig)方法来控制,这样在转屏时就不会重启activity了,而是会去调用onConfigurationChanged(Configuration newConfig)这个方法。
示例代码如下:
[html]- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.liananse.ideal"
- android:versionCode="1"
- android:versionName="1.1" >
- <uses-sdk android:minSdkVersion="10" />
- <application
- android:icon="@drawable/ic_launcher"
- android:label="@string/app_name" >
- <activity
- android:label="@string/app_name"
- android:name="com.liananse.WelcomeActivity"
- 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>
- <activity
- android:name="com.liananse.activity.MainActivity"
- android:screenOrientation="portrait"
- android:configChanges="keyboardHidden|orientation"></activity>
- <activity
- android:name="com.liananse.activity.MusicActivity"
- android:screenOrientation="portrait"
- android:configChanges="keyboardHidden|orientation"></activity>
- <activity
- android:name="com.liananse.activity.config.IdealAbout"
- android:theme="@android:style/Theme.NoTitleBar"
- android:screenOrientation="portrait"
- android:configChanges="keyboardHidden|orientation"></activity>
- <activity
- android:name="com.liananse.activity.config.IdealSetting"
- android:theme="@android:style/Theme.NoTitleBar"
- android:screenOrientation="portrait"
- android:configChanges="keyboardHidden|orientation"></activity>
- <activity
- android:name="net.youmi.android.AdActivity"
- android:configChanges="keyboard|keyboardHidden|orientation"
- android:screenOrientation="portrait"/>
- <meta-data android:name="YOUMI_CHANNEL" android:value="0" />
- </application>
- <uses-permission android:name="android.permission.INTERNET"/>
- <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
- <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
- <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
- <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
- </manifest>
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