Change toolbar back arrow color

问题

Hi. In the picture above you can see a back arrow and a (part of) title. I changed the title color using the attached .xml code. But I want to color the back arrow to white too.

I read some answer on the internet, but they look too complicated for such a simple question.

Is the any simple why to do it?

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="fill_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        app:titleTextColor="@android:color/white"/>

import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
//...

public class LoginActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
      //...
    }
    //...
}

回答1:

You can use a Theme in your Toolbar.

<android.support.v7.widget.Toolbar
  android:theme="@style/myToolbarTheme" 
  ...
>

Then in your theme you can define the colorControlNormal attribute:

   <style name=""  parent="ThemeOverlay.AppCompat.Dark.ActionBar">
      ....
      <item name="colorControlNormal">@color/myColor</item>  
   </style>

回答2:

Be mindful of the theme you use. If you copied your ToolBar code from https://developer.android.com/training/appbar/setting-up, then you have this:

<android.support.v7.widget.Toolbar
   android:id="@+id/my_toolbar"
   android:layout_width="match_parent"
   android:layout_height="?attr/actionBarSize"
   android:background="?attr/colorPrimary"
   android:elevation="4dp"
   android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
   app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

Based on @Gabriele's answer (upvoted), I had to take out the android:theme="@style/ThemeOverlay.AppCompat.ActionBar" attribute and put it in styles.xml then customize the colorControlNormal attribute like so:

<style name="ToolBarTheme"  parent="ThemeOverlay.AppCompat.ActionBar">
    <item name="colorControlNormal">@color/white</item>
</style>

Back to my Toolbar declaration, I modified as below:

<android.support.v7.widget.Toolbar
   ...
   android:theme="@style/ToolBarTheme"
   />

Cheers!

来源：https://stackoverflow.com/questions/34581408/change-toolbar-back-arrow-color