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  • 实现一个计算器的例子

    layout

    absolute_layout

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:background="@drawable/shape_rectangle"
            android:text="C"
            android:textSize="30sp"/>
        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:background="@drawable/shape_rectangle"
            android:text="+/-"
            android:textSize="30sp"/>
        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:background="@drawable/shape_rectangle"
            android:text="%"
            android:textSize="30sp"/>
        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:background="@drawable/shape_rectangle_orange"
            android:text="÷"
            android:textSize="30sp"/>
    </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="80dp"
            android:orientation="horizontal">
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="7"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="8"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="9"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle_orange"
                android:text="×"
                android:textSize="30sp"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="80dp"
            android:orientation="horizontal">
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="4"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="5"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="6"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle_orange"
                android:text="-"
                android:textSize="30sp"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="80dp"
            android:orientation="horizontal">
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="1"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle"
                android:text="2"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:text="3"
                android:background="@drawable/shape_rectangle"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:background="@drawable/shape_rectangle_orange"
                android:text="+"
                android:textSize="30sp"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="80dp"
            android:orientation="horizontal">
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="2"
                android:gravity="center_vertical"
                android:paddingLeft="40dp"
                android:text="0"
                android:background="@drawable/shape_rectangle"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:text="."
                android:background="@drawable/shape_rectangle"
                android:textSize="30sp"/>
            <TextView
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:text="="
                android:background="@drawable/shape_rectangle"
                android:textSize="30sp"/>
    
        </LinearLayout>
    </LinearLayout>

    drawable

    shape_recangle.xml

    <?xml version="1.0" encoding="utf-8"?>
    <shape xmlns:android="http://schemas.android.com/apk/res/android">
           android:shape="rectangle">
        <solid android:color="#ffffff"/>
        <stroke android:color="#333333" android:width="1dp"/>
    </shape>

    shape_recangle_orange.xml

    <?xml version="1.0" encoding="utf-8"?>
    <shape xmlns:android="http://schemas.android.com/apk/res/android">
           android:shape="rectangle">
        <solid android:color="#e47f26"/>
        <stroke android:color="#333333" android:width="1dp"/>
    </shape>

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  • 原文地址:https://www.cnblogs.com/yeyueweiliang/p/12231142.html
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