Android系统开发 禁止状态栏下拉功能

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本文来自博客园，作者：观心静 ，转载请注明原文链接：https://www.cnblogs.com/guanxinjing/p/17969803

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前言

  此博客讲解如何禁止状态栏下拉功能

禁止状态栏下拉功能

需要修改三个地方，分别是NotificationStackScrollLayout.java 、PhoneStatusBarView.java 、 StatusBarManager.java

不允许锁屏状态下拉状态栏

文件位置： frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java

    @ShadeViewRefactor(RefactorComponent.INPUT)
    private final DragDownCallback mDragDownCallback = new DragDownCallback() {

        /* Only ever called as a consequence of a lockscreen expansion gesture. */
        @Override
        public boolean onDraggedDown(View startingChild, int dragLengthY) {
            //添加这部分代码，这里在判断是否在锁屏状态，如果在锁屏就返回false，不执行下面的向下拖动的手势功能
            if (mStatusBarState == StatusBarState.KEYGUARD) {
                return false;
            }
            //----------
            if (mStatusBarState == StatusBarState.KEYGUARD
                    && hasActiveNotifications()) {
                mLockscreenGestureLogger.write(
                        MetricsEvent.ACTION_LS_SHADE,
                        (int) (dragLengthY / mDisplayMetrics.density),
                        0 /* velocityDp - N/A */);

                if (!mAmbientState.isDozing() || startingChild != null) {
                    // We have notifications, go to locked shade.
                    mShadeController.goToLockedShade(startingChild);
                    if (startingChild instanceof ExpandableNotificationRow) {
                        ExpandableNotificationRow row = (ExpandableNotificationRow) startingChild;
                        row.onExpandedByGesture(true /* drag down is always an open */);
                    }
                }

                return true;
            } else if (mDynamicPrivacyController.isInLockedDownShade()) {
                mStatusbarStateController.setLeaveOpenOnKeyguardHide(true);
                mStatusBar.dismissKeyguardThenExecute(() -> false /* dismissAction */,
                        null /* cancelRunnable */, false /* afterKeyguardGone */);
                return true;
            } else {
                // abort gesture.
                return false;
            }
        }
        //略.......

文件位置：frameworks/base/core/java/android/app/StatusBarManager.java

    /**
     * Disable some features in the status bar.  Pass the bitwise-or of the DISABLE_* flags.
     * To re-enable everything, pass {@link #DISABLE_NONE}.
     *
     * @hide
     */
    @UnsupportedAppUsage
    public void disable(int what) {
        //加上这行what = what | DISABLE_EXPAND;
        what = what | DISABLE_EXPAND;
        try {
            final int userId = Binder.getCallingUserHandle().getIdentifier();
            final IStatusBarService svc = getService();
            if (svc != null) {
                svc.disableForUser(what, mToken, mContext.getPackageName(), userId);
            }
        } catch (RemoteException ex) {
            throw ex.rethrowFromSystemServer();
        }
    }

文件位置：frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean barConsumedEvent = mBar.interceptTouchEvent(event);

        if (DEBUG_GESTURES) {
            if (event.getActionMasked() != MotionEvent.ACTION_MOVE) {
                EventLog.writeEvent(EventLogTags.SYSUI_PANELBAR_TOUCH,
                        event.getActionMasked(), (int) event.getX(), (int) event.getY(),
                        barConsumedEvent ? 1 : 0);
            }
        }

        // return barConsumedEvent || super.onTouchEvent(event);
        return true; //将上面的代码注释掉，这里直接返回true
    }

效果图

end