android中drawables和imageButtons的比较

Question

我有6个图像按钮与绘图，我试图使用getDrawable（）比较它们。这是我的xml代码

"'

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"
tools:context=".TicTacToe">

<ImageButton
    android:id="@+id/imageButton1"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginStart="25dp"
    android:layout_marginTop="147dp"
    android:layout_marginEnd="5dp"
    android:layout_marginBottom="14dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton2"
    app:layout_constraintEnd_toStartOf="@+id/imageButton01"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton01"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginTop="147dp"
    android:layout_marginEnd="5dp"
    android:layout_marginBottom="14dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton02"
    app:layout_constraintEnd_toStartOf="@+id/imageButton001"
    app:layout_constraintStart_toEndOf="@+id/imageButton1"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton2"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginStart="24dp"
    android:layout_marginEnd="6dp"
    android:layout_marginBottom="10dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton3"
    app:layout_constraintEnd_toStartOf="@+id/imageButton02"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageButton1"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton001"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginTop="148dp"
    android:layout_marginEnd="16dp"
    android:layout_marginBottom="13dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton002"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/imageButton01"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton02"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginEnd="7dp"
    android:layout_marginBottom="10dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton03"
    app:layout_constraintEnd_toStartOf="@+id/imageButton002"
    app:layout_constraintStart_toEndOf="@+id/imageButton2"
    app:layout_constraintTop_toBottomOf="@+id/imageButton01"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton002"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginEnd="14dp"
    android:layout_marginBottom="10dp"
    android:onClick="change"
    app:layout_constraintBottom_toTopOf="@+id/imageButton003"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/imageButton02"
    app:layout_constraintTop_toBottomOf="@+id/imageButton001"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton3"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginStart="24dp"
    android:layout_marginEnd="6dp"
    android:layout_marginBottom="200dp"
    android:onClick="change"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/imageButton03"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageButton2"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton03"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginEnd="7dp"
    android:layout_marginBottom="200dp"
    android:onClick="change"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/imageButton003"
    app:layout_constraintStart_toEndOf="@+id/imageButton3"
    app:layout_constraintTop_toBottomOf="@+id/imageButton02"
    app:srcCompat="@drawable/blank" />

<ImageButton
    android:id="@+id/imageButton003"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginEnd="14dp"
    android:layout_marginBottom="200dp"
    android:onClick="change"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/imageButton03"
    app:layout_constraintTop_toBottomOf="@+id/imageButton002"
    app:srcCompat="@drawable/blank" />

"'

科特林代码

"'

类TicTacToe： AppCompat活动（）{

var spot1: ImageButton? =null
var spot01: ImageButton? =null
var spot001: ImageButton? =null
var spot2: ImageButton? =null
var spot02: ImageButton? =null
var spot002: ImageButton? =null
var spot3: ImageButton? =null
var spot03: ImageButton? =null
var spot003: ImageButton? =null

override fun onCreate(savedInstanceState: Bundle?)

{

    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_tic_tac_toe)
    spot1 = findViewById<ImageButton>(R.id.imageButton1)
    spot01 = findViewById<ImageButton>(R.id.imageButton01)
    spot001 = findViewById<ImageButton>(R.id.imageButton001)
    spot2 = findViewById<ImageButton>(R.id.imageButton2)
    spot02 = findViewById<ImageButton>(R.id.imageButton02)
    spot002 = findViewById<ImageButton>(R.id.imageButton002)
    spot3 = findViewById<ImageButton>(R.id.imageButton3)
    spot03 = findViewById<ImageButton>(R.id.imageButton03)

    spot003 = findViewById<ImageButton>(R.id.imageButton003)

}

val photos: IntArray= intArrayOf(R.drawable.x, R.drawable.o, R.drawable.blank)

var turn = 1
var winState = false

fun change(view: View){
    var spot = findViewById<ImageButton>(view.getId()) //as Button

    if(turn == 1) {
        spot.setImageResource(photos[0])
        turn = turn * -1
    }

    else{
        spot.setImageResource(photos[1])
        turn = turn * -1
    }

    if(spot1?.getDrawable() == spot01?.getDrawable() &&
        spot1?.getDrawable() == spot001?.getDrawable() &&
        spot1?.getDrawable() != photos[2].toDrawable())
    {
        winState = true;
        Toast.makeText(getApplicationContext(),"Winner",Toast.LENGTH_SHORT).show();
    }
}

}

"'

Answer 1

Drawable是一个对象，因此需要使用equals（）方法进行比较。无论如何，我也不确定它是否会起作用，因为我不确定可绘制方法是如何实现该方法的，所以它可能不适合您的情况。

此外，您正在使用视图检查业务逻辑的状态，这一点都不理想。最好的解决方案是使用一张地图或一个矩阵（比方说，一个维数为[3][3]的数组），在这里存储单个点的实际值，然后将可绘制内容与矩阵中的值进行协调。

我知道这会影响代码中的所有内容，您必须对其进行重大更改，因此更快速的解决方案可能是在图像按钮上使用android:tag。可以在其上指定任何对象，因此也可以使用and Integer并对其进行比较，始终使用equals（）方法。这意味着您可以依赖标记来实现逻辑。