1.使用include标签实现包含共享UI设计
(1)创建新的布局文件 title_layout.xml,里面包含共享内容的布局
(2)layout属性:其对应抽取出来的共享的布局内容
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="@drawable/share_background"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<include layout="@layout/title_layout"></include>
</LinearLayout>
2.使用shapes实现渐变效果
(1)创建新的drawable的xml文件
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient android:startColor="#FFFF0000" android:endColor="#80FF00FF"
android:angle="270"/>
<padding android:left="50dp" android:top="20dp"
android:right="7dp" android:bottom="7dp" />
<corners android:radius="8dp" />
</shape>
android:shape="rectangle" 默认的也是长方形
corners表示是有半径
(还有很多其它参数)
(2)设置android:background属性
android:background="@drawable/share_background"
3.灵活使用styles.xml
(1)在res/values目录下新建一个style.xml,增加<resource>根节点
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="SpecialText" parent="@style/Text">
<item name="android:textSize">18sp</item>
<item name="android:textColor">#008</item>
</style>
<style name="button_style">
<item name="android:textStyle">bold</item>
<item name="android:textColor">#FFFFFFFF</item>
<item name="android:layout_width">100.0dip</item></style>
</resources>
(2)设置style属性
<EditText id="@+id/text1"
style="@style/SpecialText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello, World!" />
现在这个EditText组件的所表现出来的风格就为我们在上边的XML文件中所定义的那样。
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4.自定义按钮显示效果
(1)在drawable中创建新的xml文件--mybutton.xml文件。
<item android:state_window_focused="false" android:drawable="@color/transparent" />
<!-- Even though these two point to the same resource, have two states so the drawable will invalidate itself when coming out of pressed state. 注意这句话-->
<item android:state_focused="true" android:state_enabled="false"
android:state_pressed="true"
android:drawable="@drawable/selector_background_disabled" />
<item android:state_focused="true" android:state_enabled="false"
android:drawable="@drawable/lselector_background_disabled" />
<item android:state_focused="true" android:state_pressed="true"
android:drawable="@drawable/selector_background_transition" />
<item android:state_focused="false" android:state_pressed="true"
android:drawable="@drawable/selector_background_transition" />
<item android:state_focused="true"
android:drawable="@drawable/selector_background_focus" />
</selector>
(2)在构造的layout中引用这个xml
<ImageButton
android:id="@+id/ImageButton01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/mybutton">
</ImageButton>
5.实现无失真图片拉伸(NinePatch图片处理)
使用draw9patch.bat工具创建 .9.png图片