屏幕方向锁定

Question

是否有可靠的方法可以在所有Android设备上锁定屏幕方向？以下代码适用于我的Nexus S和其他手机，但由于某种原因ROTATION_90对应于Xoom上的SCREEN_ORIENTATION_REVERSE_PORTRAIT。有什么方法可以可靠地将旋转映射到方向？private void lockScreenOrientation() {    if (!mScreenOrientationLocked) {        final int orientation = getResources().getConfiguration().orientation;        final int rotation = getWindowManager().getDefaultDisplay().getOrientation();        if (rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90) {            if (orientation == Configuration.ORIENTATION_PORTRAIT) {                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);            }            else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);            }        }        else if (rotation == Surface.ROTATION_180 || rotation == Surface.ROTATION_270) {            if (orientation == Configuration.ORIENTATION_PORTRAIT) {                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);            }            else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);            }        }        mScreenOrientationLocked = true;    }}private void unlockScreenOrientation() {    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);    mScreenOrientationLocked = false;}编辑：此代码旨在获取当前方向并将其锁定。方向被暂时锁定，然后释放给用户。

Answer 1

我略微修改了diyism的答案，以弥补在版本2.3之前不能使用reverse_landscape和reverse_portrait模式的事实

private static void disableRotation(Activity activity)

{       

    final int orientation = activity.getResources().getConfiguration().orientation;

    final int rotation = activity.getWindowManager().getDefaultDisplay().getOrientation();

    // 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;

    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.FROYO)

    {

        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);

        }

    }

}

private static void enableRotation(Activity activity)

{

    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);

}

Answer 2

要临时锁定屏幕，您可以轻松使用：

//developing for android tablets **<uses-sdk android:minSdkVersion="12" />**

//works perfectly... **WATCH OUT**: look portrait to reverse-portrait on api level 13 :)

currentActivity.setRequestedOrientation(currentActivity.getResources().getConfiguration().orientation);

//to re-enable sensor, just do:

currentActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

在显示对话框和进行重要的背景工作期间，将其用于临时屏幕锁定。

确保currentActivity在您尝试访问它时是有效的，否则它将无法正常工作:)

祝好运 ：）