第一次作业

1.

2.

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/rl_1"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <View

        android:id="@+id/v_1"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#000000"

        android:layout_centerInParent="true"/>

    <View

        android:id="@+id/v_2"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#0EDB16"

        android:layout_above="@id/v_1"

        android:layout_toLeftOf="@id/v_1"

        />

    <View

        android:id="@+id/v_3"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#F80505"

        android:layout_above="@id/v_1"

        android:layout_toRightOf="@id/v_1"/>

    <View

        android:id="@+id/v_4"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#028FFA"

        android:layout_below="@id/v_1"

        android:layout_toRightOf="@id/v_1"/>

 

    <View

        android:id="@+id/v_5"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#D709FC"

        android:layout_below="@id/v_1"

        android:layout_toLeftOf="@id/v_1"/>

    <View

        android:id="@+id/v_6"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#FCE103"

        android:layout_below="@id/v_2"

        android:layout_toLeftOf="@id/v_1"/>

    <View

        android:id="@+id/v_7"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#03DAF8"

        android:layout_below="@id/v_1"

        android:layout_toLeftOf="@id/v_4"/>

    <View

        android:id="@+id/v_8"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#5600F3"

        android:layout_below="@id/v_2"

        android:layout_toRightOf="@id/v_1"/>

    <View

        android:id="@+id/v_9"

        android:layout_width="100dp"

        android:layout_height="100dp"

        android:background="#09F1D7"

        android:layout_above="@id/v_1"

        android:layout_toRightOf="@id/v_2"/>

</RelativeLayout>

3.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent">

<ImageView
android:id="@+id/v_0"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="@drawable/haokandetupian"
android:layout_centerHorizontal="true"
android:layout_marginTop="150dp" />

<EditText
android:id="@+id/v_1"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="用户名"
android:background="@drawable/btn_2"
android:layout_marginTop="20dp"
android:layout_marginHorizontal="10dp"
android:padding="10dp"
android:drawableLeft="@drawable/zhanghao"
android:drawablePadding="10dp"
android:layout_below="@id/v_0"/>

<EditText
android:id="@+id/v_2"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="密码"
android:background="@drawable/btn_2"
android:layout_margin="10dp"
android:padding="10dp"
android:drawableLeft="@drawable/mima"
android:drawablePadding="10dp"
android:layout_below="@id/v_1"/>

<Button
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginTop="100dp"
android:text="登录"
android:layout_margin="40dp"
android:background="@drawable/btn_1"
android:layout_below="@id/v_2"/>

</RelativeLayout>