Android--锁定横屏、竖屏、去标题全屏

　　要实现这个目的，只需要在AndroidManifest.xml里声明Activity的时候加上一个属性：android:screenOrientation，属性取值landscape为固定横屏、portrait为固定纵屏幕。

<!-- android:screenOrientation="portrait" 竖屏 
android:screenOrientation="landscape " 横屏 
android:screenOrientation="unspecified" 未指明方向 
--> 
<activity 
            android:label="@string/app_name" 
            android:name=".LockTheScreenActivity" 
            android:screenOrientation="portrait" 
  ></activity> 

@Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);// 横屏 
 //setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) 竖屏 
        setContentView(R.layout.main); 
    } 

去标题

<span style="font-size:14px;">public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 


    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
  }</span>

<span style="font-size:14px;">public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
 this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
  }</span>