更改左侧的ToolBar默认图标 [英] Change ToolBar default icon on the left
本文介绍了更改左侧的ToolBar默认图标的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我目前在顶部使用工具栏,想要用主页按钮替换默认的后退按钮。但是当我添加项目时,它总是添加到右边。我没有看到任何layout_gravity选项可供选择。有没有办法做到这一点?
I am using a ToolBar at the top at present and want to replace the default back button with a home button. But when I add item, it always adds to the right. I don't see any layout_gravity options to choose either. Is there a way to do this?
MainActivity
MainActivity
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_delete);
toolbar = (Toolbar)findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(" Testing");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home_icon_empty, menu);
return true;
}
home_icon_empty.xml
home_icon_empty.xml
<item
android:id="@+id/homepage"
android:orderInCategory="100"
android:title="HOME"
android:icon="@drawable/home_icon"
app:showAsAction="always"
/>
<item
android:id="@+id/homepage1"
android:orderInCategory="200"
android:title="HOME"
android:icon="@drawable/home_icon"
app:showAsAction="always"
/>
activity_main.xml
activity_main.xml
<include
android:id="@+id/app_bar"
layout="@layout/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
app_bar.xml
app_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary">
</android.support.v7.widget.Toolbar>
当前工具栏输出:
预期工具栏输出:
新编辑后的图片:
推荐答案
设为NavigationIcon:
Set as NavigationIcon:
Drawable drawable = ContextCompat.getDrawable(context, R.drawable.your_drawable)
toolbar.setNavigationIcon(drawable);
setSupportActionBar(toolbar);
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