如何在運行時鎖定方向

Question

有沒有在運行時鎖定方向的方法？例如，如果用戶當前處於橫向並切換菜單選項，我想讓用戶鎖定屏幕以橫向顯示。

Answer 1

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 

調用某個活動時，將其鎖定爲橫向。在ActivityInfo類中查找其他標誌。您可以將其鎖定爲縱向或使其傳感器/滑塊驅動。

此處瞭解詳情：http://www.devx.com/wireless/Article/40792

Answer 2

我似乎已經有類似的情況。我想支持任何方向，但我需要在工作流程中的某個點之後保持當前方向。我的解決辦法是：

在受保護的工作流程的條目：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR); 

在受保護的工作流程的退出：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); 

Answer 3

注意什麼之間getConfiguration回報率的差異，什麼setRequestedOrientation希望 - 它們都是int，但它們來自不同的常量定義。

這裏是如何鎖定當前的定位，同時允許180度翻轉

int currentOrientation = getResources().getConfiguration().orientation; 
if (currentOrientation == Configuration.ORIENTATION_LANDSCAPE) { 
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE); 
} 
else { 
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT); 
} 

Answer 4

這個工程上的設備能夠反向縱向和橫向反轉。

鎖方向：

int orientation = getActivity().getRequestedOrientation(); 
    int rotation = ((WindowManager) getActivity().getSystemService(
      Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation(); 
    switch (rotation) { 
    case Surface.ROTATION_0: 
     orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; 
     break; 
    case Surface.ROTATION_90: 
     orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; 
     break; 
    case Surface.ROTATION_180: 
     orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT; 
     break; 
    default: 
     orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; 
     break; 
    } 

    getActivity().setRequestedOrientation(orientation); 

解鎖方向：

getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED); 

Answer 5

替代@pstoppani答案與支持平板電腦（如@pstoppani答案，這將僅適用於設備> 2.2）
- 在上測試和Samsung Galaxy Tab 10.1

public static void lockOrientation(Activity activity) { 
    Display display = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay(); 
    int rotation = display.getRotation(); 
    int tempOrientation = activity.getResources().getConfiguration().orientation; 
    int orientation = 0; 
    switch(tempOrientation) 
    { 
    case Configuration.ORIENTATION_LANDSCAPE: 
     if(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90) 
      orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; 
     else 
      orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; 
     break; 
    case Configuration.ORIENTATION_PORTRAIT: 
     if(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_270) 
      orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; 
     else 
      orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT; 
    } 
    activity.setRequestedOrientation(orientation); 
} 

Answer 6

這裏是我的代碼，你可以用這些方法屏幕一把鎖，一旦完成了任務與unlockOrientation解鎖：

/** Static methods related to device orientation. */ 
public class OrientationUtils { 
    private OrientationUtils() {} 

    /** Locks the device window in landscape mode. */ 
    public static void lockOrientationLandscape(Activity activity) { 
     activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 
    } 

    /** Locks the device window in portrait mode. */ 
    public static void lockOrientationPortrait(Activity activity) { 
    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
    } 

    /** Locks the device window in actual screen mode. */ 
    public static void lockOrientation(Activity activity) { 
     final int orientation = activity.getResources().getConfiguration().orientation; 
     final int rotation = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation(); 

     // Copied from Android docs, since we don't have these values in Froyo 2.2 
     int SCREEN_ORIENTATION_REVERSE_LANDSCAPE = 8; 
     int SCREEN_ORIENTATION_REVERSE_PORTRAIT = 9; 

     // Build.VERSION.SDK_INT <= Build.VERSION_CODES.FROYO 
     if (!BuildVersionUtils.hasGingerbread()) { 
      SCREEN_ORIENTATION_REVERSE_LANDSCAPE = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; 
      SCREEN_ORIENTATION_REVERSE_PORTRAIT = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; 
     } 

     if (rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90){ 
      if (orientation == Configuration.ORIENTATION_PORTRAIT){ 
       activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
      } 
      else if (orientation == Configuration.ORIENTATION_LANDSCAPE){ 
       activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 
      } 
     } 
     else if (rotation == Surface.ROTATION_180 || rotation == Surface.ROTATION_270) 
     { 
      if (orientation == Configuration.ORIENTATION_PORTRAIT){ 
       activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_PORTRAIT); 
      } 
      else if (orientation == Configuration.ORIENTATION_LANDSCAPE){ 
       activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_LANDSCAPE); 
      } 
     } 
    } 

    /** Unlocks the device window in user defined screen mode. */ 
    public static void unlockOrientation(Activity activity) { 
     activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER); 
    } 

} 

Answer 7

這裏是@pstoppani的Xamarin轉換上面的答案。

注意：這是一個片段，替換活動。與這個。如果在活動中使用，則爲。

public void LockRotation() 
{ 
    ScreenOrientation orientation; 

    var surfaceOrientation = Activity.WindowManager.DefaultDisplay.Rotation; 

    switch (surfaceOrientation) { 
     case SurfaceOrientation.Rotation0: 
      orientation = ScreenOrientation.Portrait; 
      break; 
     case SurfaceOrientation.Rotation90: 
      orientation = ScreenOrientation.Landscape; 
      break; 
     case SurfaceOrientation.Rotation180: 
      orientation = ScreenOrientation.ReversePortrait; 
      break; 
     default: 
      orientation = ScreenOrientation.ReverseLandscape; 
      break; 
    } 

    Activity.RequestedOrientation = orientation; 
} 

public void UnlockRotation() 
{ 
    Activity.RequestedOrientation = ScreenOrientation.Unspecified; 
} 

這是未經測試的，因爲在使用前使用了不同的方法，但可能會有用。