如何在新的AppCompat工具栏中更改HomeAsUp指示器？

Question

我想在我的AppCompat工具栏中更改默认的ActionBar homeAsUp指示符(drawable).怎么实现呢？仅显示默认箭头.

样式(与其他API级别相同):

<style name="AppBaseTheme" parent="Theme.AppCompat.Light.NoActionBar">

        <!-- API 14 theme customizations can go here. -->
        <item name="android:windowActionBarOverlay">true</item>
        <item name="android:homeAsUpIndicator">@drawable/home</item>

        <!-- Support library compatibility -->
        <item name="windowActionBarOverlay">true</item>
        <item name="homeAsUpIndicator">@drawable/home</item>
</style>

我的片段布局中的工具栏:

<android.support.v7.widget.Toolbar
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/my_awesome_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/transparent"
        android:homeAsUpIndicator="@drawable/home"
        android:minHeight="?attr/actionBarSize"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        app:theme="@style/AppTheme" />

在片段中:

toolbar = (Toolbar) rootView.findViewById(R.id.my_awesome_toolbar);

        activity.setSupportActionBar(toolbar);

        ActionBar actionBar = activity.getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowTitleEnabled(false);

Answer 1

要在运行时调用图标:

toolbar.setNavigationIcon(R.drawable.home);

风格/主题不起作用的伎俩.

如何使用appcompat v21在独立工具栏上启用homeAsUp或调用setDisplayHomeAsUpEnabled()

Answer 2

我试过了setHomeAsUpIndicator(int resId),它有效.

private void initToolbar ( Toolbar mToolbar ) {

    mToolbar.setTitleTextColor ( getResources ().getColor ( R.color.main_title ) );
    setSupportActionBar ( mToolbar );

    ActionBar actionbar = getSupportActionBar ();
    actionbar.setDisplayHomeAsUpEnabled ( true );
    actionbar.setHomeAsUpIndicator ( R.drawable.ic_action_back );
}

但是mToolbar.setNavigationIcon(R.drawable.ic_action_back)不起作用:(

Answer 3

只需将此行添加到styles.xml即可

        <item name="navigationIcon">@drawable/ic_back_arrow</item>

Answer 4

如果android.support.v7.app.ActionBarDrawerToggle与DrawerLayout和Toolbar一起使用,您可以使用以下代码更改homeAsUp图标:

//set home as up indicator
mDrawerToggle.setHomeAsUpIndicator(R.drawable.ic_up_indicator);

//remove home as up indicator
mDrawerToggle.setHomeAsUpIndicator(null);

显示homeAsUpIndicator指标而不是主页指标执行以下操作:

mDrawerToggle.setDrawerIndicatorEnabled(false);

文档:

ActionBarDrawerToggle#setHomeAsUpIndicator ActionBarDrawerToggle#setDrawerIndicatorEnabled