Android让所有应用都竖屏显示或者横屏显示

1. 所有应用竖屏显示：

frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

public int rotationForOrientationLw(int orientation, int lastRotation,
            boolean displayEnabled) {
            // Initialize the rotation angles for each orientation once.
Display d = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
                    .getDefaultDisplay();
           if (d.getWidth() > d.getHeight()) {
  mPortraitRotation = Surface.ROTATION_90;
  mLandscapeRotation = Surface.ROTATION_0;
  mUpsideDownRotation = Surface.ROTATION_270;
  mSeascapeRotation = Surface.ROTATION_180;
  } else {
  mPortraitRotation = Surface.ROTATION_0;
  mLandscapeRotation = Surface.ROTATION_90;
  mUpsideDownRotation = Surface.ROTATION_180;
  mSeascapeRotation = Surface.ROTATION_270;
  }

.......

2.  所有应用横屏屏显示：

frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

public int rotationForOrientationLw(int orientation, int lastRotation,
            boolean displayEnabled) {
            // Initialize the rotation angles for each orientation once.
            Display d = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE))
                    .getDefaultDisplay();
            if (d.getWidth() > d.getHeight()) {
                mPortraitRotation = Surface.ROTATION_0;  //jeff. ROTATION_90;
                mLandscapeRotation = Surface.ROTATION_0;
                mUpsideDownRotation = Surface.ROTATION_90;  //jeff. 270;
                mSeascapeRotation = Surface.ROTATION_180;
            }