Question

我用Activity制作了一个NavigationView。当我选择一个NavigationView项时，它会加载一个Fragment。

这是Activity：

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{

private DrawerLayout drawer;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_apresenta_atividades);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.app_name, R.string.app_name);
    drawer.addDrawerListener(toggle);
    toggle.syncState();
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
}
...

@Override
public boolean onNavigationItemSelected(MenuItem item) {
    Fragment fragment = null;
    Class fragmentClass;
    ...
    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager.beginTransaction().replace(R.id.layout, fragment).commit();
    item.setChecked(true);
    setTitle(item.getTitle());
    drawer.closeDrawers();
    return true;
}
}

这是MainActivity和多个片段的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"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ddffff"
android:fitsSystemWindows="true">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include
        android:id="@+id/bar"
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    //Layout for FirstFragment
    <RelativeLayout
        android:id="@+id/layout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        ...

    </RelativeLayout>

    //Layout for SecondFragment
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        ...

    </RelativeLayout>
</LinearLayout>

<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:background="#ddffff"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

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

当它启动一个Fragment时，有两个ActionBars：

我不明白如何重新组织我的.xml才能在上面显示ActionBar。感谢。

编辑：app_bar_main.xml：

<?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"
android:fitsSystemWindows="true"
android:id="@+id/co_layout" >

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

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

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

styles.xml：

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

 </resources>

Answer 1

你可以尝试这样做，不要求第二个AppBarLayout：

<?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:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".activity.HomeActivity">

<android.support.v4.widget.DrawerLayout
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:id="@+id/home_header_layout"
        android:fitsSystemWindows="true">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways" />

    </LinearLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:layout_gravity="start"

        app:menu="@menu/homepage_leftdrawer">


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

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

如果您想手动添加"Theme.AppCompat.Light.NoActionBar"，请考虑styles.xml中的Toolbar属性。

我的styles.xml：

<style name="AppTheme3" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/ColorPrimary</item>
    <item name="colorPrimaryDark">@color/ColorPrimaryDark</item>
    <item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
    <!-- Customize your theme here. -->
</style>

<style name="AppTheme3.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name="AppTheme3.AppBarTransparent" parent="ThemeOverlay.AppCompat.Dark" />

<style name="AppTheme3.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

<style name="DrawerArrowStyle" parent="@style/Widget.AppCompat.DrawerArrowToggle">
    <item name="color">@android:color/white</item>
</style>

styles-v21.xml：

<style name="AppTheme3" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/ColorPrimary</item>
    <item name="colorPrimaryDark">@color/ColorPrimaryDark</item>
    <item name="android:colorAccent">@color/ColorPrimary</item>
    <item name="android:statusBarColor">@color/ColorPrimaryDark</item>
    <item name="android:colorFocusedHighlight">@color/ColorPrimary</item>
    <item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
    <item name="android:windowTranslucentStatus">false</item>
    <item name="colorControlHighlight">@color/ColorControlHighlight</item>
    <item name="android:windowContentTransitions">true</item>
    <!-- Customize your theme here. -->
</style>


<style name="AppTheme3.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name="AppTheme3.AppBarTransparent" parent="ThemeOverlay.AppCompat.Dark" >
    <item name="color">@android:color/white</item>
</style>

<style name="AppTheme3.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

<style name="DrawerArrowStyle" parent="@style/Widget.AppCompat.DrawerArrowToggle">

    <item name="color">@android:color/white</item>
</style>

片段上的重复ActionBar

1 个答案: