之前我們實作的部分都還沒進入主要功能，這篇開始，我們將進入最主要的玩家介面，最終會實作出2個玩家(player1、player2)的介面，兩個介面一樣，這裡只實作一個做為示範

activity_player1_chess_game.xml

這邊先附上layout:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ab7557"
    tools:context=".player1.Player1ChessGame">

    <TextView
        android:id="@+id/textView13"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/black"
        app:layout_constraintBottom_toTopOf="@+id/guideline3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_room_number"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:gravity="center|right"
        android:text="房號:"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/guideline3"
        app:layout_constraintEnd_toStartOf="@+id/guideline5"
        app:layout_constraintStart_toEndOf="@+id/btn_back"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_show_room_number"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:gravity="center_vertical"
        android:text=""
        android:textColor="@color/white"
        app:layout_constraintBottom_toTopOf="@+id/guideline3"
        app:layout_constraintEnd_toStartOf="@+id/guideline38"
        app:layout_constraintStart_toEndOf="@+id/tv_room_number"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/btn_back"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/redbackground_blackline"
        android:gravity="center"
        android:text="退出"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:backgroundTint="@null"
        app:layout_constraintBottom_toTopOf="@+id/guideline3"
        app:layout_constraintEnd_toStartOf="@+id/guideline4"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <RelativeLayout
        android:id="@+id/relativeLayout"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline9"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline8">

        <androidx.gridlayout.widget.GridLayout
            android:id="@+id/grid_playerChessboard"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerInParent="true">

        </androidx.gridlayout.widget.GridLayout>
    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/relativeLayout2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline2"
        app:layout_constraintEnd_toStartOf="@+id/guideline7"
        app:layout_constraintStart_toStartOf="@+id/guideline6"
        app:layout_constraintTop_toTopOf="@+id/guideline">

        <androidx.gridlayout.widget.GridLayout
            android:id="@+id/grid_playerChessmanSelect"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerInParent="true">

        </androidx.gridlayout.widget.GridLayout>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline2"
        app:layout_constraintEnd_toStartOf="@+id/guideline7"
        app:layout_constraintStart_toStartOf="@+id/guideline6"
        app:layout_constraintTop_toTopOf="@+id/guideline">

        <androidx.gridlayout.widget.GridLayout
            android:id="@+id/grid_playerChessman"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerInParent="true">

        </androidx.gridlayout.widget.GridLayout>
    </RelativeLayout>

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.1" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline76"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.175" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.25" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.3" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.7" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.75" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.1" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.25" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.45" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline38"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.75" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.9" />

    <TextView
        android:id="@+id/tv_message"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        android:paddingLeft="10dp"
        android:paddingTop="5dp"
        android:text=""
        android:textColor="#1e2371"
        app:layout_constraintBottom_toTopOf="@+id/guideline76"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline3" />

    <TextView
        android:id="@+id/tv_systemMessage"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        android:paddingLeft="10dp"
        android:paddingTop="5dp"
        android:text="系統訊息:"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/guideline8"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline76" />

    <Button
        android:id="@+id/btn_setting"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/redbackground_blackline"
        android:text="設置"
        android:textColor="@color/white"
        android:textStyle="bold"
        app:backgroundTint="@null"
        app:layout_constraintBottom_toTopOf="@+id/guideline3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@+id/guideline38"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.64" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        app:layout_constraintBottom_toTopOf="@+id/guideline8"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/brownline"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline9" />

    <ScrollView
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/guideline102"
        app:layout_constraintEnd_toStartOf="@+id/guideline88"
        app:layout_constraintStart_toStartOf="@+id/guideline54"
        app:layout_constraintTop_toTopOf="@+id/guideline103">

        <TextView
            android:id="@+id/tv_moveData"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text=""
            android:textColor="@color/white" />
    </ScrollView>

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline54"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.05" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline88"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.95" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline103"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.77" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline102"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.98" />

</androidx.constraintlayout.widget.ConstraintLayout>

整個介面設計分為幾個部分:

• 工具列: 包含back Button、顯示roomNumber的TextView、以及setting Button
• 訊息框: 包含對話訊息TextView以及系統訊息TextView
• 棋盤: 包含棋盤的GridLayout、棋子的GridLayout、棋子選擇的GridLayout
• 棋譜: 包含可滑動的ScrollView以及顯示棋譜的TextView

GridLayout部分需要在build.gradle加上maven:

implementation 'androidx.gridlayout:gridlayout:1.0.0'

這樣我們就實作了主要下棋功能的介面，player2也是照同樣的方式設計