android4.4上全屏界面实现禁止状态栏下拉

  public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000;
+    /**
+     * @hide
+     *
+     * NOTE: Flag for {@link #setSystemUiVisibility(int)}: It help user to disable transient
+     * status bar triggered by gesture
+     */
+    public static final int SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED = 0x00002000;

 // monitor for system gestures
        mSystemGestures = new SystemGesturesPointerEventListener(context,
                new SystemGesturesPointerEventListener.Callbacks() {
                    @Override
                    public void onSwipeFromTop() {
+                        if (isGestureIsolated())
+                            return;
                        if (mStatusBar != null) {
                            requestTransientBars(mStatusBar);
                        }
                    }
                    @Override
                    public void onSwipeFromBottom() {
+                        if (isGestureIsolated())
+                            return;
                        if (mNavigationBar != null && mNavigationBarOnBottom) {
                            requestTransientBars(mNavigationBar);
                        }
                    }
                    @Override
                    public void onSwipeFromRight() {
+                        if (isGestureIsolated())
+                            return;                   
                        if (mNavigationBar != null && !mNavigationBarOnBottom) {
                            requestTransientBars(mNavigationBar);
                        }
                    }
                    @Override
                    public void onDebug() {
                        // no-op
                    }
+                    private boolean isGestureIsolated() {
+                        WindowState win = mFocusedWindow != null ? mFocusedWindow : mTopFullscreenOpaqueWindowState;
+                        if (win != null && (win.getSystemUiVisibility() & View.SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED) != 0)
+                            return true;
+                        else
+                            return false;
+                    }
                });