Activity Visual Customization

Most Action Bar visuals can be customized using standard theming:

<resources>
  <style name="MyTheme" parent="@style/Theme.AppCompat">
    <item name="colorPrimary">#847</item>
    <item name="titleTextColor">@color/green</item>
    <item name="actionMenuTextColor">@color/green</item>
    <item name="android:textColorPrimary">@color/green</item>
  </style>
</resources>

Activity title and menu items text can be modified using string resources (localization):

<resources>
  <string name="crop_image_activity_title">Title</string>
  <string name="crop_image_menu_rotate_right">Rotate</string>
  <string name="crop_image_menu_crop">Crop</string>
</resources>

Other customization are available via activity builder:

CropImage.activity(imageUri)
  .setActivityMenuIconColor(Color.GREEN)
  .setAllowRotation(true)
  .setActivityTitle("Title")
  .start(this);

Action Bar Theme

The activity is derived from AppCompatActivity which requires that its theme to derive from Theme.AppCompat.
If your main theme is one of *.NoActionBar sub-theme's you must override CropImageActivity theme in the manifest with theme that includes action bar:

<activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
          android:theme="@style/Theme.AppCompat"/>

Activity Title

Default: empty string
By default no title is shown on the crop image activity.
Override activity title using crop_image_activity_title string resource.
For dynamic title use .setActivityTitle("Title") activity builder method.

Rotation menu item

Default: left-hidden, right-shown, 90 degrees, Icons
Override text using crop_image_menu_rotate_left/crop_image_menu_rotate_right string resource.
Override icon using crop_image_menu_rotate_left/crop_image_menu_rotate_right drawable resource.
Modify icon color using .setActivityMenuIconColor(Color.GREEN) activity builder method.
Show counter-clockwise rotation button using .setAllowCounterRotation(true) activity builder method.
Hide by using .setAllowRotation(false) activity builder method.
Change rotation degrees by left/right buttons using .setRotationDegrees(15) activity builder method.

Crop menu item

Default: "CROP" Text
Override text using crop_image_menu_crop string resource or setCropMenuCropButtonTitle() activity builder method.
Set icon using setCropMenuCropButtonIcon() activity builder method, If set the crop menu item will use that icon and the text will appear as tooltip.
Modify icon color using .setActivityMenuIconColor(Color.GREEN) activity builder method.