TextView及其子类

TextView有两个常用的子类分别是EditTextView和Button
AutoCompleteTextView自动完成文本框子类MultiCompleteTextView（多提示）
CompoundButton（compound复合）Togglebutton状态开关RadioButton单选按钮CheckBox复选框

1. TextView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" tools:context="com.phone.hty.myapplication.MainActivity">

    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" android:drawableLeft="@drawable/aa" android:gravity="center"/>
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/longtext" android:singleLine="true" android:ellipsize="end"/>
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:autoLink="email|phone" android:text="13079682160"/>
        <!--shadow这几个属性要一起来-->
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:shadowColor="#00f" android:shadowDx="10.0" android:shadowDy="10.0" android:text="Hello World" android:shadowRadius="3.0" android:textColor="#f00" android:textSize="40sp"/>
    <EditText  android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberPassword" android:numeric="integer"/>
    <CheckedTextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="hhhhhh" android:checkMark="@android:drawable/ic_input_add"/>
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="cewb" android:background="@drawable/bg"/>
    <TextView  android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/bg2" android:text="gggg" android:textSize="40sp" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#fff000"/>
    <stroke android:width="4px" android:color="#f00"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <corners  android:bottomLeftRadius="20pt" android:bottomRightRadius="20px" android:topLeftRadius="10px" android:topRightRadius="10px" />
    <!-- stroke画笔的意思-->
    <stroke android:color="#f0f" android:width="4px"/>
    <!--gradient是梯度的意思 -->
    <gradient android:startColor="#f00" android:centerColor="#0f0" android:endColor="#00f" android:type="sweep"/>
</shape>

gradient标签用于颜色变化
stroke标签用于画边框
shape标签是形状变化指定属性android:shape=”rectangle”
corners标签使用在定义形状的边角

1. Button
   

button背景drawable定义是用selector标签

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:drawable/ic_menu_agenda" android:state_pressed="true"/>
    <item android:drawable="@android:drawable/btn_star_big_off" android:state_pressed="false"/>
</selector>