当另一个抽屉菜单打开时如何锁定

Question

我的视野里有两个导航抽屉。当右边的抽屉打开时，我想锁左边的抽屉，当左边的抽屉打开时，我想锁右边的抽屉。

就目前情况而言，当（例如）左侧抽屉打开时，您从右侧滑动以将其关闭，则在左侧抽屉完全关闭之前，右侧抽屉开始打开。这是不可取的行为。

这是我尝试过的，但当我滑动抽屉时，我得到一个NullPointerException。

// Left Drawer Config
_leftDrawerToggler = new DrawerToggler(this,
                                       _rootViewLayout,
                                       Resource.Drawable.ic_drawer_light,
                                       Resource.String.drawer_open,
                                       Resource.String.drawer_close);

_leftDrawerToggler.DrawerClosed += delegate
    {
        InvalidateOptionsMenu();
        _rootViewLayout.SetDrawerLockMode(DrawerLayout.LockModeUnlocked, _rightDrawerLayout);
    };

_leftDrawerToggler.DrawerOpened += delegate
{
    _leftDrawerList.SetItemChecked(0, true);
    InvalidateOptionsMenu();
    _rootViewLayout.SetDrawerLockMode(DrawerLayout.LockModeLockedClosed, _rightDrawerLayout);
};

_rootViewLayout.SetDrawerShadow(Resource.Drawable.drawer_shadow_dark, (int)GravityFlags.Left);
_rootViewLayout.SetDrawerListener(_leftDrawerToggler);



// Right Drawer Config
_rightDrawerToggler = new DrawerToggler(this,
                                       _rootViewLayout,
                                       Resource.Drawable.ic_drawer_light,
                                       Resource.String.drawer_open,
                                       Resource.String.drawer_close);

_rightDrawerToggler.DrawerClosed += delegate
    {
        InvalidateOptionsMenu();
        _rootViewLayout.SetDrawerLockMode(DrawerLayout.LockModeUnlocked, _leftDrawerLayout);
    };
_rightDrawerToggler.DrawerOpened += delegate
{
    _rightDrawerList.SetItemChecked(0, true);
    InvalidateOptionsMenu();
    _rootViewLayout.SetDrawerLockMode(DrawerLayout.LockModeLockedClosed, _leftDrawerLayout);
};

_rootViewLayout.SetDrawerShadow(Resource.Drawable.right_drawer_shadow_dark, (int)GravityFlags.Right);
_rootViewLayout.SetDrawerListener(_rightDrawerToggler);

Answer 1

问题是您没有锁定右侧视图。另一个问题是，对于抽屉布局，您只需要一个侦听器。从您的代码中，我可以理解您的抽屉布局有两个侦听器

您的布局XML应该有一个带有两个ListView的抽屉布局（ListView的布局应该是一个开始，另一个结束）

当抽屉打开时，检查查看对象是否相等。equal（），然后锁定另一个列表视图，当“抽屉”关闭时，解锁另一个列表视图。

像这样更改代码

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_drawer_layout);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mLeftDrawerList = (ListView) findViewById(R.id.left_drawer);
    mRightDrawerList = (ListView) findViewById(R.id.right_drawer);

    mDrawerToggle = new ActionBarDrawerToggle(this,
            mDrawerLayout,R.drawable.ic_drawer,
            R.string.drawer_open,R.string.drawer_close)
    {
        public void onDrawerOpened(View view){
            if(view.equals(mRightDrawerList)) {
                mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mLeftDrawerList);
            }
            else {
                mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mRightDrawerList);
            }
            invalidateOptionsMenu();
        }

        public void onDrawerClosed(View view)
        {
            if(view.equals(mRightDrawerList)) {
                mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mLeftDrawerList);
            }
            else {
                mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mRightDrawerList);
            }
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);
}

这应该行得通。如果你看到任何问题，请告诉我。