android - 将屏幕方向锁定为其(自然)默认方向

Question

我想将屏幕方向锁定为其默认方向。我在实现这一点时遇到问题。最初我将屏幕锁定为 list 中的肖像。它适用于纵向默认设备。但是许多平板电脑默认为横向，因此在这些设备中锁定纵向是不合适的，我想检测此默认方向并将其锁定。我的意思是，如果横向是默认方向，我想将方向锁定为横向，如果是纵向，则将其锁定到端口。这该怎么做。我被困在这部分。我不想支持两个方向(自动)。请帮忙

谢谢。

Answer 1

不同设备有默认方向，例如 galaxy 10 平板电脑的默认方向不同于 nexus 7 平板电脑。当您获得显示器的方向时，您将获得以下值:

这么说，你在你的锁定方法中要做的是:

public void mLockScreenRotation(FA_Padre actividad){
    int buildVersionSDK = Build.VERSION.SDK_INT;
    Display display = ((WindowManager) actividad.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
    int orientation=0;
    if(buildVersionSDK >= 8){
        orientation=display.getRotation();
    }
    /****************Phone*************************************/
    if(buildVersionSDK < 8){// older Android versions with only two orientations
        switch (actividad.getResources().getConfiguration().orientation){

        case Configuration.ORIENTATION_PORTRAIT:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;
        case Configuration.ORIENTATION_LANDSCAPE:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            break;

        }
    }else if((buildVersionSDK > 7 ) && (!GlobalInfo.isTablet())){// Newer Android phones with more than two orientations

        switch(orientation){

        case Surface.ROTATION_0:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;
        case Surface.ROTATION_90:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            break;
        case Surface.ROTATION_180:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;
        case Surface.ROTATION_270:
            actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            break;

        }
    /****************TABLET*************************************/
    }else{
        int width = 0;
        int height = 0;
        switch(orientation){
            /*If the default orientation of the device is landscape Rotation_0 and rotation_180 will be the case if the device is being held in landscape. if the default orientation of the device is portrait rotation_0 or 180 will only be the case if the device is in portrait mode*/ 
            case Surface.ROTATION_0:
            case Surface.ROTATION_180:  
                width = display.getWidth();
                height = display.getHeight();
                break;
          /*the opposite in here*/
            case Surface.ROTATION_90: //      
            case Surface.ROTATION_270:
                width = display.getHeight();
                height = display.getWidth();
                break;
            default:
                break;
        }
        if(width > height){//Default ORIENTATION = LANDSCAPE, lock the screen in the current orientation
            switch(orientation){

            case Surface.ROTATION_0:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                break;
            case Surface.ROTATION_90:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
                break;
            case Surface.ROTATION_180:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
                break;
            case Surface.ROTATION_270:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                break;
            } 

        } else {//Default ORIENTATION = PORTRAIT, lock the screen in the current orientation
            switch(orientation){

            case Surface.ROTATION_0:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                break;
            case Surface.ROTATION_90:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                break;
            case Surface.ROTATION_180:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
                break;
            case Surface.ROTATION_270:
                actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
                break;
            }

        } 

    }
}