Android：一旦我以编程方式禁用滚动视图行为，我将无法再次启用它

Posted 2023-02-22

【中文标题】Android：一旦我以编程方式禁用滚动视图行为，我将无法再次启用它

【英文标题】：Android: Once I disable scrollingviewbehavior programmatically I can't enable it again

【发布时间】：2017-12-17 20:33:53

【问题描述】：

根据我当时打开抽屉布局的要求，我想禁用滚动行为，当我关闭抽屉布局时，我想启用它。我可以在打开drawerLayout时禁用滚动行为，但在关闭adrawerLayout时无法启用它。

下面是我的代码

DrawerLayout mdrawer_layout = (DrawerLayout) getParentFragment().getView().findViewById(R.id.drawer_layout);
        mdrawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
        mdrawer_layout.addDrawerListener(new DrawerLayout.DrawerListener() 
            @Override
            public void onDrawerSlide(View drawerView, float slideOffset) 

            

            @Override
            public void onDrawerOpened(View drawerView) 
                Toolbar toolbar = (Toolbar) mActivity.findViewById(R.id.actionBar);
                AppBarLayout appbar = (AppBarLayout) mActivity.findViewById(R.id.appBarLayout);

                /*AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
                params.setScrollFlags(0);*/

                CoordinatorLayout.LayoutParams appBarLayoutParams = (CoordinatorLayout.LayoutParams) appbar.getLayoutParams();
                appBarLayoutParams.setBehavior(null);
                appbar.setLayoutParams(appBarLayoutParams);
            

            @Override
            public void onDrawerClosed(View drawerView) 

                Toolbar toolbar = (Toolbar) mActivity.findViewById(R.id.actionBar);
                AppBarLayout appbar = (AppBarLayout) mActivity.findViewById(R.id.appBarLayout);
                FrameLayout frameContainer = (FrameLayout) mActivity.findViewById(R.id.frameContainer);

                /*AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
                params.setScrollFlags(params.SCROLL_FLAG_ENTER_ALWAYS);
                toolbar.setLayoutParams(params);*/

                CoordinatorLayout.LayoutParams appBarLayoutParams = (CoordinatorLayout.LayoutParams) frameContainer.getLayoutParams();
                appBarLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
                frameContainer.setLayoutParams(appBarLayoutParams);

                appBarLayoutParams = (CoordinatorLayout.LayoutParams) appbar.getLayoutParams();
                appBarLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
                appbar.setLayoutParams(appBarLayoutParams);
            

            @Override
            public void onDrawerStateChanged(int newState) 

            
        );

我的布局文件如下。

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_
    android:layout_>

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/myCoordinator"
        android:layout_
        android:layout_>

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appBarLayout"
            android:layout_
            android:layout_
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <include layout="@layout/toolbar" />

        </android.support.design.widget.AppBarLayout>


        <FrameLayout
            android:id="@+id/frameContainer"
            android:layout_
            android:layout_
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    </android.support.design.widget.CoordinatorLayout>



</android.support.v4.widget.DrawerLayout>

【参考方案1】：

对于锁定，您可以这样做：

mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);

解锁：

mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);

【讨论】：

我不是在谈论抽屉布局。禁用 CoordinatorLayout 后，我​​无法以编程方式启用它的滚动行为。