在Android开发中,为响应美化应用中控件的效果,使用Shape定义图形效果,可以解决图片过多的问题。
首先看一下效果图:
整个页面布局为:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#e6e6e6" android:orientation="vertical" android:gravity="center_vertical" > <ImageView android:id="@+id/iv1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_marginTop="20dp" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_above="@id/account_editor" android:src="@drawable/head" /> <EditText android:id="@+id/account_editor" android:layout_width="fill_parent" android:layout_height="@dimen/edit_box_height" android:layout_below="@id/title_bar" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:background="@drawable/input_box" android:ellipsize="end" android:gravity="center_vertical" android:hint="@string/mobile_hint" android:inputType="numberDecimal" android:maxLength="11" android:paddingLeft="@dimen/input_box_left_padding" android:paddingRight="40.0dip" android:singleLine="true" android:textColor="@color/grey_text" android:textSize="@dimen/font_normal" /> <TextView android:id="@+id/error" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/account_editor" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/notice_vertical_padding" android:ellipsize="end" android:singleLine="true" android:textColor="@color/red_text" android:textSize="@dimen/font_small" android:visibility="gone" /> <EditText android:id="@+id/psw_editor" android:layout_width="fill_parent" android:layout_height="@dimen/edit_box_height" android:layout_below="@+id/error" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:background="@drawable/input_box" android:ellipsize="end" android:gravity="center_vertical" android:hint="@string/psw_hint" android:inputType="textPassword" android:maxLength="16" android:paddingLeft="@dimen/input_box_left_padding" android:singleLine="true" android:textColor="@color/grey_text" android:textSize="@dimen/font_normal" /> <Button android:id="@+id/login" style="@style/common_button_style" android:layout_below="@id/psw_editor" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:text="@string/login" /> <RelativeLayout android:layout_width="wrap_content" android:layout_height="30.0dip" android:layout_below="@+id/login" android:layout_centerHorizontal="true" android:layout_marginTop="25.0dip" > <TextView android:id="@+id/register" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:clickable="true" android:text="@string/register" android:textColor="@color/black_text" android:textSize="@dimen/font_normal" /> <TextView android:id="@+id/forgot_psw" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_marginRight="@dimen/activity_horizontal_margin" android:clickable="true" android:text="@string/forgot_psw" android:textColor="@color/black_text" android:textSize="@dimen/font_normal" /> </RelativeLayout> </RelativeLayout>
<Button android:id="@+id/login" style="@style/common_button_style" android:layout_below="@id/psw_editor" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:text="@string/login" />
<style name="common_button_style"> <item name="android:layout_width">match_parent</item> <item name="android:layout_height">@dimen/btn_next_height</item> <item name="android:background">@drawable/selector_red_corners_button</item> <item name="android:padding">6.0dip</item> <item name="android:textColor">@android:color/white</item> <item name="android:textSize">@dimen/font_large</item> <item name="android:layout_gravity">center_horizontal</item> </style>
selector_red_corners_button.xml
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/shape_red_corners_button_pressed" /> <item android:state_pressed="false" android:drawable="@drawable/shape_red_corners_button" /> </selector>
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <corners android:radius="20.0px" /> <solid android:color="@color/red_dark" /> </shape>
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <corners android:radius="20.0px" /> <solid android:color="@color/red_light" /> </shape>
相关的颜色:
<color name="red_dark">#ffb52121</color> <color name="red_light">#ffcd2222</color>
http://download.csdn.net/detail/jdsjlzx/8365315
Shape的属性:
描述:内部填充
属性:android:color 填充颜色
描述:大小
属性:
android:width 宽
android:height 高
描述:渐变色
属性:
android:startColor渐变起始颜色
android:endColor渐变结束颜色
android:centerColor渐变中间颜色
android:angle 渐变的角度,angle=0时,渐变色是从左向右,然后逆时针方向转;当angle=90时,渐变色从上往下。angle必然是45的倍数
android:type 渐变类型:linear(线性)、radial(放射性,以开始色为中心)、sweep(扫描线式渐变)
android:userLevel如果要使用LevelListDrawable对象,就要设置为true。设置true无渐变色,false有渐变色
android:grdientRadial渐变半径,只有设置type为radial时,此值才生效
android:centerX 渐变中心X点坐标的相对位置
android:centerY 渐变中心Y点坐标的相对位置
描述:描边
属性:
android:width 描边宽度
android:color 描边颜色
android:dashwidth描边样式为虚线时的宽度,值为0时为实线,值大于0时为虚线
android:dashGap 描边为虚线时,虚线之间的间隔
描述:圆角
属性:
android:radius 四个角半径值
android:topLeftRadius左上角半径值
android:topRightRadius右上角半径值
android:bottomLeftRadius右下角半径值
android:bottomRightRadius左下角半径值
描述:内边距
属性:
android:left 左内边距
android:right 右内边距
android:top 上内边距
android:bottom 下内边距
实例代码