Question

我有一个带有两个不同抽屉的主活动： - 左侧的导航栏 - 右侧的通知

布局 main.xml 如下：

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.test.toto.MainActivity">

    <!-- As the main content view, the view below consumes the entire
         space available using match_parent in both dimensions. -->
    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white"/>

    <fragment android:id="@+id/navigation_drawer"
        android:layout_width="@dimen/navigation_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:name="com.test.toto.NavigationDrawer" />

    <fragment android:id="@+id/notification_drawer"
        android:layout_width="@dimen/navigation_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="end"
        android:name="com.test.toto.NotificationDrawer" />

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

在我的主要活动 MainActivity.java 中，我执行以下操作：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    mNavigationDrawer = (NavigationDrawer)
            getFragmentManager().findFragmentById(R.id.navigation_drawer);
    mNotificationDrawer = (NotificationDrawer)
            getFragmentManager().findFragmentById(R.id.notification_drawer);

    // Set up the drawers
    mNavigationDrawer.setUp(
            R.id.navigation_drawer,
            (DrawerLayout) findViewById(R.id.drawer_layout));

    mNotificationDrawer.setUp(
            R.id.notification_drawer,
            (DrawerLayout) findViewById(R.id.drawer_layout));
}

在两个抽屉片段中都有setUp方法（例如 NotificationDrawer.java ）：

public void setUp(int fragmentId, DrawerLayout drawerLayout) {
        mFragmentContainerView = getActivity().findViewById(fragmentId);
        mDrawerLayout = drawerLayout;

        // set a custom shadow that overlays the main content when the drawer opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.END);

        ActionBar actionBar = getActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setHomeButtonEnabled(true);

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the navigation drawer and the action bar app icon.
        mDrawerToggle = new ActionBarDrawerToggle(
                getActivity(),                    /* host Activity */
                mDrawerLayout,                    /* DrawerLayout object */
                R.drawable.ic_drawer,             /* nav drawer image to replace 'Up' caret */
                R.string.navigation_drawer_open,  /* "open drawer" description for accessibility */
                R.string.navigation_drawer_close  /* "close drawer" description for accessibility */
        ) {
            @Override
            public void onDrawerClosed(View drawerView) {
                super.onDrawerClosed(drawerView);
                if (!isAdded()) {
                    return;
                }
                getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
            }

            @Override
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                if (!isAdded()) {
                    return;
                }
            }
        };

        // Defer code dependent on restoration of previous instance state.
        mDrawerLayout.post(new Runnable() {
            @Override
            public void run() {
                mDrawerToggle.syncState();
            }
        });

        // HERE IS THE PROBLEM
        mDrawerLayout.setDrawerListener(mDrawerToggle);
}

我的问题是mDrawerLayout在两个设置（R.id.drawer_layout）中都是相同的，所以当我第二次调用setUp时，setDrawerListener方法会被新的Listener覆盖（在我的例子中是导航一个）取代我的通知一。）

因此，导航抽屉不会调用导航抽屉与操作栏（ onDrawerClosed 和 onDrawerOpened ）之间进行交互的方法。

如何为两个抽屉调用这些方法？ 当打开一个或另一个抽屉时，我需要在两种情况下都做一些事情。

Answer 1

你的听众必须处理两个抽屉。在OnDrawerOpened和OnDrawerClosed中，您必须检查参数中的哪个抽屉并使用正确的代码。

DrawerListener在双抽屉活动中被覆盖

1 个答案: