Android如何横屏, 全屏, 背景灯常量

横屏方法
1. 在AndroidManifest.xml中的Activity加入android:screenOrientation="landscape"
配置文件中对Activity节点添加android:screenOrientation属性(landscape是横向，portrait是纵向)

<activity android:name=".TestActivity" android:screenOrientation="landscape"                   android:label="@string/app_name">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>

2. 在Java的Activity中写入以下方法:
要设置成竖屏设置成 SCREEN_ORIENTATION_PORTRAIT

@Overrideprotected void onResume() {if (getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);}super.onResume();}

全屏方法

public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);             //设置全屏显示         requestWindowFeature(Window.FEATURE_NO_TITLE);        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);        setContentView(R.layout.main);}

保持背景灯常亮

public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);        setContentView(R.layout.main);}

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