Android 4.2 禁止下拉状态栏

最近在做一个界面需要禁止下拉状态栏，于是整理了一下，以后备用。

import android.app.StatusBarManager;//首先导入包

StatusBarManager mStatusBar = (StatusBarManager) getSystemService(this.STATUS_BAR_SERVICE);//获得对象

mStatusBar.disable(StatusBarManager.DISABLE_EXPAND);//禁止下拉状态栏

mStatusBar.disable(StatusBarManager.DISABLE_NONE);//启用下拉状态栏（在onDestroy（）添加）

//此代码只能在源码环境下才能编译

---------------------------------------------------源码中是这样定义的--------------------------------------------------------

source/frameworks/base/core/java/android/app/StatusBarManager.java

public static final int DISABLE_EXPAND = View.STATUS_BAR_DISABLE_EXPAND;

public static final int DISABLE_NONE = 0x00000000;

/**
     * Disable some features in the status bar.  Pass the bitwise-or of the DISABLE_* flags.
     * To re-enable everything, pass {@link #DISABLE_NONE}.
     */
    public void disable(int what) {
        try {
            final IStatusBarService svc = getService();//获得IStatusBarService 的对象
            if (svc != null) {
                svc.disable(what, mToken, mContext.getPackageName());//实际上使用的是IStatusBarService的disable方法
            }
        } catch (RemoteException ex) {
            // system process is dead anyway.
            throw new RuntimeException(ex);
        }
    }

private synchronized IStatusBarService getService() {

        if (mService == null) {

            mService = IStatusBarService.Stub.asInterface(

                    ServiceManager.getService(Context.STATUS_BAR_SERVICE));//使AIDL获取IStatusBarService对象
            if (mService == null) {
                Slog.w("StatusBarManager", "warning: no STATUS_BAR_SERVICE");
            }
        }
        return mService;
    }

source/frameworks/base/services/java/com/android/server/StatusBarManagerService.java

    public void disable(int what, IBinder token, String pkg) {

        disableInternal(mCurrentUserId, what, token, pkg);

    }

    private void disableInternal(int userId, int what, IBinder token, String pkg) {

        enforceStatusBar();

        synchronized (mLock) {

            disableLocked(userId, what, token, pkg);

        }

    }

   private void disableLocked(int userId, int what, IBinder token, String pkg) {

        // It's important that the the callback and the call to mBar get done

        // in the same order when multiple threads are calling this function

        // so they are paired correctly.  The messages on the handler will be

        // handled in the order they were enqueued, but will be outside the lock.

        manageDisableListLocked(userId, what, token, pkg);

        final int net = gatherDisableActionsLocked(userId);

        if (net != mDisabled) {

            mDisabled = net;

            mHandler.post(new Runnable() {

                    public void run() {

                        mNotificationCallbacks.onSetDisabled(net);

                    }

                });

            if (mBar != null) {

                try {

                    mBar.disable(net);

                } catch (RemoteException ex) {

                }

            }

        }

    }

source/frameworks/base/core/java/android/view/View.java

    /**

     * @hide

     *

     * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked

     * out of the public fields to keep the undefined bits out of the developer's way.

     *

     * Flag to make the status bar not expandable.  Unless you also

     * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show.

     */

    public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000;