Question

所以我在我的主要活动中使用带有导航抽屉的折叠工具栏来构建android应用程序但是导航抽屉的拖轮按钮没有显示。所以我需要一种方法来在工具栏完全折叠时特别显示切换

这是我的content_main：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.infinity.dev.nearby.Main2Activity"
    tools:showIn="@layout/app_bar_main2"
    android:background="@color/grey"
    android:fillViewport="false">
    <android.support.design.widget.AppBarLayout
        android:id="@+id/MyAppbar"
        android:layout_width="match_parent"
        android:layout_height="256dp"
        android:fitsSystemWindows="true">
    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapse_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:contentScrim="@color/colorPrimary"
        android:fitsSystemWindows="true">

    <ImageView
        android:id="@+id/bgheader"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"
        android:background="@drawable/france"
        android:fitsSystemWindows="true"
        app:layout_collapseMode="pin" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/MyToolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            style="@style/AppTheme"

            app:layout_collapseMode="parallax" />



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


    </android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView...>

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

这是activity_main.xml：

 <?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"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:openDrawer="start">

        <include
            layout="@layout/app_bar_main2"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />



        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_main2"
            app:menu="@menu/activity_main2_drawer"
            app:itemTextColor="#212121"
            />

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

这是app_bar_main.xml：

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

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

<include layout="@layout/content_main2" />

这是main_activity.java中使用的代码：

final Toolbar toolbar = (Toolbar) findViewById(R.id.MyToolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
CollapsingToolbarLayout collapsingToolbarLayout =  (CollapsingToolbarLayout)findViewById(R.id.collapse_toolbar);
collapsingToolbarLayout.setTitle("My Country");
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);                    

collapsingToolbarLayout.setContentScrimColor(ContextCompat.getColor(context,R.color.colorPrimary));

image of toolbar before collapse:

image of toolbar after Collapse

Answer 1

可能有两个原因，一件事就是尝试点击切换按钮的位置，如果它打开抽屉意味着你的切换因为你的主题风格而不可见，所以你可以改变你的切换颜色来自主题，否则这一个：

 <?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"
                                    xmlns:tools="http://schemas.android.com/tools"
                                    android:id="@+id/drawer_layout"
                                    android:layout_width="match_parent"
                                    android:layout_height="match_parent"
                                    android:fitsSystemWindows="true"
                                    tools:context=".ui.MainActivity">


   <android.support.design.widget.CoordinatorLayout
                android:id="@+id/htab_maincontent"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/htab_appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/htab_collapse_toolbar"
            android:layout_width="match_parent"
            android:layout_height="320dp"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">

            <ImageView
                android:id="@+id/bgheader"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/france"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="104dp"
                android:gravity="top"
                android:minHeight="?attr/actionBarSize"

                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:layout_scrollFlags="scroll|enterAlways|snap"
                app:layout_collapseMode="pin"

                app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />


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


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

  <android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header"
    app:menu="@menu/nav_items" />
  </android.support.v4.widget.DrawerLayout>



 This might be useful for you ,try to use this one

使用NavigationDrawer切换按钮折叠工具栏不显示

1 个答案: