我对编码非常陌生,我一直在试图弄清楚如何将图像添加到Android的工具栏中。为什么这不起作用?
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.admin.prototypeapp.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
<android.support.v7.widget.Toolbar
style="@style/ToolBarStyle"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
<ImageView
android:contentDescription="@string/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/white_logo_transparent"/>
</android.support.v7.widget.Toolbar>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>
是否可以插入这样的图像?
它告诉我/android.support.v7.widget.Toolbar应该是/android.support.design.widget.CoordinatorLayout
新秀的错误?有没有更好的方法呢?
答案 0 :(得分:0)
So, total complexity would be O(1)+O(n).
Where O(1)= look up in HashMap
O(n)= iterate all the elements
的xml标记未关闭。请尝试:
Toolbar