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Thiết kế giao diện Android - App Calculation Android Studio

Đối với lập trình trên thiết bị di động thiết kế giao diện quá một vấn đề cực kỳ quan trọng. Bởi App của bạn có được người dùng ưa thích không là 1 phần lớn do giao diện của nó. Đặc biệt là đối với lập trình trên android thì thiết kế giao diện Android là một vấn đề cực kỳ khó khăn bởi vì các thiết bị sử dụng android có rất nhiều chủng loại, nhiều kích cỡ màng hình khác nhau.
Vậy làm sao để thiết kế giao diện Android 1 cách đẹp nhất. Hôm nay StudyCoding.Net sẽ hướng dẫn các bạn chương trình "dễ nhất mọi ngôn ngữ" Calculation 





PHP:
<TableLayout 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="#FF000000"
    tools:context=".MainActivity" >

    <!-- dòng 1  Nháºp -->

    <TextView
        android:id="@+id/edt_output"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:gravity="right"
        android:textSize="15sp" />

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="60sp"
        android:background="#FF000000" >

        <EditText
            android:id="@+id/edt"
            android:layout_width="match_parent"
            android:layout_height="60sp"
            android:layout_weight="0.9"
            android:gravity="right"
            android:inputType="number"
            android:text="9x8"
            android:textColor="#FFFFFFFF"
            android:textSize="35sp" >

            <requestFocus />
        </EditText>
    </TableRow>
    <!-- dòng 2 Space vs DELETE -->

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="60sp"
        android:background="#FF000000" >

        <Button
            android:id="@+id/btnSpace"
            android:layout_width="match_parent"
            android:layout_height="50sp"
            android:layout_marginLeft="2sp"
            android:layout_weight="0.6"
            android:background="#FF252222" >
        </Button>

        <Button
            android:id="@+id/btnDelete"
            android:layout_width="match_parent"
            android:layout_height="50sp"
            android:layout_marginLeft="3sp"
            android:layout_marginRight="2sp"
            android:layout_weight="0.3"
            android:background="#FF252222"
            android:onClick="btnNumberClick"
            android:text="DELETE"
            android:textColor="#FFFFFFFF" >
        </Button>
    </TableRow>

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginRight="3sp"
        android:layout_marginTop="3sp" >

        <!-- 789 -->

        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber7"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="7"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber8"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="8"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber9"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="9"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnChia"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:onClick="btnNumberClick"
                android:text="/"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- 456 -->

        <TableRow
            android:id="@+id/tableRow2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber4"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="4"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber5"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="5"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber6"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="6"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNhan"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:onClick="btnNumberClick"
                android:text="x"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- 123 -->

        <TableRow
            android:id="@+id/tableRow3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber1"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="1"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber2"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="2"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber3"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="3"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnTru"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:onClick="btnNumberClick"
                android:text="-"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- . 0 = -->

        <TableRow
            android:id="@+id/tableRow4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="2sp"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnCham"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="."
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber0"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:onClick="btnNumberClick"
                android:text="0"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnBang"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:onClick="btnNumberClick"
                android:text="="
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnCong"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:onClick="btnNumberClick"
                android:text="+"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
    </TableLayout>

</TableLayout>

<TableLayout 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="#FF000000"

    tools:context=".MainActivity" >

    <!-- dòng 1  Nhập -->

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="60sp"
        android:background="#FF000000" >

        <EditText
            android:id="@+id/edt_Output"
            android:layout_width="match_parent"
            android:layout_height="60sp"
            android:layout_weight="0.9"
            android:inputType="number"
            android:text="9x8"
            android:textColor="#FFFFFFFF"
            android:textSize="35sp" >

            <requestFocus />
        </EditText>
    </TableRow>
    <!-- dòng 2 Space vs DELETE -->

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="60sp"
        android:background="#FF000000" >

        <Button
            android:id="@+id/btnSpace"
            android:layout_width="match_parent"
            android:layout_height="50sp"
            android:layout_marginLeft="2sp"
            android:layout_weight="0.6"
            android:background="#FF252222" >
        </Button>

        <Button
            android:id="@+id/btnDelete"
            android:layout_width="match_parent"
            android:layout_height="50sp"
            android:layout_marginLeft="3sp"
            android:layout_marginRight="2sp"
            android:layout_weight="0.3"
            android:background="#FF252222"
            android:onClick="btnClick"
            android:text="DELETE"
            android:textColor="#FFFFFFFF" >
        </Button>
    </TableRow>

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginRight="3sp"
        android:layout_marginTop="3sp" >

        <!-- 789 -->

        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber7"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="7"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber8"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="8"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber9"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="9"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnChia"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:text="/"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- 456 -->

        <TableRow
            android:id="@+id/tableRow2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber4"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="4"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber5"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="5"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber6"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="6"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNhan"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:text="×"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- 123 -->

        <TableRow
            android:id="@+id/tableRow3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnNumber1"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="1"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber2"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="2"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber3"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="3"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnTru"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:text="-"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
        <!-- . 0 = -->

        <TableRow
            android:id="@+id/tableRow4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="2sp"
            android:layout_marginTop="2sp"
            android:layout_weight="0.250" >

            <Button
                android:id="@+id/btnCham"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="."
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnNumber0"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF746C6C"
                android:text="0"
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnBang"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:text="="
                android:textColor="#FFFFFFFF"
                android:textSize="60sp" >
            </Button>

            <Button
                android:id="@+id/btnCong"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_marginLeft="2sp"
                android:layout_weight="0.25"
                android:background="#FF252222"
                android:text="+"
                android:textColor="#FFFFFFFF"
                android:textSize="40sp" >
            </Button>
        </TableRow>
    </TableLayout>

</TableLayout>
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