Android 10 打开下拉菜单自动旋转后，竖屏应用也会随着重力感应旋转

测试同事反馈了个 bug，打开下拉菜单自动旋转后，所有的竖屏应用也会随着重力感应旋转。
代码没改动过这块，按理说竖屏应用，打开自动旋转后，竖屏app应该按应用本身设置的方向显示。
按着这个系列文章加 log 打印跟系统转屏流程

最后定位到问题 mIgnoreRotationForApps 引起的，之前没遇到过这个问题，因为很少用4:3这个比例的屏幕。

frameworksbaseservicescorejavacomandroidserverwmDisplayContent.java


    @Override
    int getOrientation() {
        final WindowManagerPolicy policy = mWmService.mPolicy;

        if (mIgnoreRotationForApps) {
            return SCREEN_ORIENTATION_USER;
        }

        if (mWmService.mDisplayFrozen) {
            if (mLastWindowForcedOrientation != SCREEN_ORIENTATION_UNSPECIFIED) {
                if (DEBUG_ORIENTATION) Slog.v(TAG_WM, "Display id=" + mDisplayId
                        + " is frozen, return " + mLastWindowForcedOrientation);
                // If the display is frozen, some activities may be in the middle of restarting, and
                // thus have removed their old window. If the window has the flag to hide the lock
                // screen, then the lock screen can re-appear and inflict its own orientation on us.
                // Keep the orientation stable until this all settles down.
                return mLastWindowForcedOrientation;
            } else if (policy.isKeyguardLocked()) {
                // Use the last orientation the while the display is frozen with the keyguard
                // locked. This could be the keyguard forced orientation or from a SHOW_WHEN_LOCKED
                // window. We don't want to check the show when locked window directly though as
                // things aren't stable while the display is frozen, for example the window could be
                // momentarily unavailable due to activity relaunch.
                if (DEBUG_ORIENTATION) Slog.v(TAG_WM, "Display id=" + mDisplayId
                        + " is frozen while keyguard locked, return " + mLastOrientation);
                return mLastOrientation;
            }
        } else {
       
  // Not much of use to rotate the display for apps since it's close to square.
        mIgnoreRotationForApps = isNonDecorDisplayCloseToSquare(Surface.ROTATION_0, width, height);

 
    private boolean mIgnoreRotationForApps;