Android编程Froyo2.2版本实现360度旋转

--- a/frameworks/base/core/java/android/view/WindowOrientationListener.java
+++ b/frameworks/base/core/java/android/view/WindowOrientationListener.java
@@ -124,13 +124,14 @@ public abstract class WindowOrientationListener {
???????? private static final int ROTATION_0 = 0;
???????? private static final int ROTATION_90 = 1;
???????? private static final int ROTATION_270 = 2;
+??????? private static final int ROTATION_180 = 3;

???????? // Current orientation state
???????? private int mRotation = ROTATION_0;

???????? // Mapping our internal aliases into actual Surface rotation values
???????? private final int[] SURFACE_ROTATIONS = new int[] {Surface.ROTATION_0, Surface.ROTATION_90,
-??????????????? Surface.ROTATION_270};
+??????????????? Surface.ROTATION_270, Surface.ROTATION_180};

???????? // Threshold ranges of orientation angle to transition into other orientation states.
???????? // The first list is for transitions from ROTATION_0, the next for ROTATION_90, etc.
@@ -141,15 +142,18 @@ public abstract class WindowOrientationListener {
???????? // however, we enforce stricter thresholds, pushing the thresholds 15 degrees closer to 180.
???????? private final int[][][] THRESHOLDS = new int[][][] {
???????????????? {{60, 180}, {180, 300}},
-??????????????? {{0, 45}, {45, 165}, {330, 360}},
-??????????????? {{0, 30}, {195, 315}, {315, 360}}
+??????????????? {{0, 45}, {45, 165}, {165,225}, {330, 360}},
+?????????????? {{0, 30}, {145,195}, {195,315}, {315, 360}},
+?????????????? {{0, 45}, {45,165}, {165,225}, {225, 360}}
???????? };

???????? // See THRESHOLDS
???????? private final int[][] ROTATE_TO = new int[][] {
???????????????? {ROTATION_270, ROTATION_90},
-??????????????? {ROTATION_0, ROTATION_270, ROTATION_0},
-??????????????? {ROTATION_0, ROTATION_90, ROTATION_0}
+??????????????? {ROTATION_0, ROTATION_270, ROTATION_180, ROTATION_0},
+??????????????? {ROTATION_0, ROTATION_180, ROTATION_90, ROTATION_0},
+??????????????? {ROTATION_0, ROTATION_270,? ROTATION_180, ROTATION_90}
+??????????????? //{ROTATION_270, ROTATION_90}
???????? };

???????? // Maximum absolute tilt angle at which to consider orientation changes.? Beyond this (i.e.
@@ -159,7 +163,7 @@ public abstract class WindowOrientationListener {
???????? // Additional limits on tilt angle to transition to each new orientation.? We ignore all
???????? // vectors with tilt beyond MAX_TILT, but we can set stricter limits on transition to a
???????? // particular orientation here.
-??????? private final int[] MAX_TRANSITION_TILT = new int[] {MAX_TILT, MAX_TILT, MAX_TILT};
+??????? private final int[] MAX_TRANSITION_TILT = new int[] {MAX_TILT, MAX_TILT, MAX_TILT, MAX_TILT};