Android Layout 01_activity_Login.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: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" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:text="账户：" />
<EditText
android:id="@+id/et_loginname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_toRightOf="@id/textView1"
android:hint="登录名"
android:ems="10" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/et_loginname"
android:text="密码：" />
<EditText
android:id="@+id/et_loginpwd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/et_loginname"
android:layout_toRightOf="@id/textView2"
android:layout_marginLeft="8dp"
android:hint="账户密码"
android:ems="10"
android:inputType="numberPassword" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="8dp"
android:layout_below="@id/et_loginpwd"
android:layout_alignParentRight="true"
android:text="重置" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/et_loginpwd"
android:layout_toLeftOf="@id/button2"
android:onClick="login"
android:text="确定" />

</RelativeLayout>