android studio开发，toolbar上的searchview图标如何更改？

Question

默认的icon是黑色的，如何更改为白色？
在toolbar的menu里改icon文件没有效果

Answer 1

Update

搬运工
How to change SearchView default icon?
Changing the background drawable of the searchview widget

Unfortunately, there is no easy way to change the SearchView icon to a custom drawable, since the theme attribute searchViewSearchIcon is not public. See this answer for details.

However, I think that your problem is caused by inheriting from the wrong theme. Please use > android:Theme.Holo.Light.DarkActionBar as the base for your theme. Then the default icons on > the action bar should have a light color.

<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    ...
</style>

我的测试结果：
在values-v14/styles.xml中设置style为android:Theme.Holo.Light，对应图片的上部分；
设置style为android:Theme.Holo.Light.DarkActionBar，对应图片的下部分；

Old Answer： 这段代码确实改不了SearchView icon，只能改普通的 menu item

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu items for use in the action bar
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_full_player, menu);
        
        MenuItem item = menu.findItem(R.id.catcher_action_playPause);
        Drawable icon = getResources().getDrawable(R.drawable.ic_pause_circle_outline_white_36dp);
        item.setIcon(icon);
        
        return super.onCreateOptionsMenu(menu);
    }

Answer 2

更改图像编码onPrepareOptionsMenu在这段我建议创建一个方法，通过菜单项从onprepareoptionsmenu在那方法做的任务。