Android 案例 登录界面

login_top.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/logintopbg"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"

>

<EditText
android:id="@+id/etName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:background="@android:drawable/edit_text"
android:drawableLeft="@drawable/icons_user_img"
android:ems="10"
android:hint="@string/etname" >

<requestFocus />
</EditText>

<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etName"
android:layout_below="@+id/etName"
android:layout_marginTop="20dp"
android:background="@android:drawable/edit_text"
android:drawableLeft="@drawable/icons_password_img"
android:drawablePadding="10dp"
android:ems="10"
android:hint="@string/etPassword"
android:inputType="textPassword" />

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etPassword"
android:layout_below="@+id/etPassword"
android:layout_marginTop="10dp" >

<Button
android:id="@+id/btnLogin"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/btn_select"
android:text="@string/btnLogin" />

<Button
android:id="@+id/btnRegiste"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="5dp"
android:background="@drawable/btn_select"
android:text="@string/btnRegiste" />

</LinearLayout>
</RelativeLayout>

btn_select.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<!--
按钮点击和不点击的效果
属性:
android:state_pressed:
false:未按下
true:按下
-->
<item android:drawable="@drawable/btn_shape" android:state_pressed="false"></item>
<item android:drawable="@drawable/btn_shape_after" android:state_pressed="true"></item>
</selector>

btn_shape_after.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- solid:填充色 corners:边角的弧度 -->
<solid android:color="#87cefa"/>
<corners android:radius="10dp"/>

</shape>

btn_shape.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="#FF72CAE1"/>
<corners android:radius="10dp"/>

</shape>

login.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="#55FFFFFF"/>
<corners android:radius="10dp"/>

</shape>

logintopbg.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="#55ffffff"/>
<corners android:radius="10dp"/>

</shape>

string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">Wlaker</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="etname">请输入账号</string>
<string name="etPassword">请输入密码</string>
<string name="btnLogin">登录</string>
<string name="btnRegiste">注册</string>
<string name="tvForgetPass"><u>忘记密码</u></string>
</resources>

activity_main.xml
<RelativeLayout 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:background="@drawable/activity_weather_bg"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<include
android:id="@+id/include1"
layout="@layout/login_top"/>

<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/monkey"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/include1"
android:layout_marginBottom="20dp"
>
</ImageView>
<TextView
android:id="@+id/tvForgetPass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/include1"
android:layout_below="@+id/include1"
android:layout_marginTop="24dp"
android:text="@string/tvForgetPass"
android:textAppearance="?android:attr/textAppearanceMedium"
/>

</RelativeLayout>

//其中btn_select.xml btn_shape.xml btn_shape_after.xml login.xml logintopbg.xml是要同写在新建的drawable文件里的。