要是没有约束布局 画一个这样的类似表的布局。。需要定义自定义view去计算。
或者是手动计算好再写上去。
就很麻烦。
但是
<?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"
tools:context=".MainActivity">
<TextView
android:id="@+id/tv0"
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="0"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="1"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="30"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="2"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="60"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="3"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="90"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="4"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="120"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="5"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="150"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="6"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="180"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="7"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="210"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="8"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="240"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="9"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="270"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="10"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="300"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="11"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="330"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:text="12"
android:textColor="#fff"
android:textSize="24sp"
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="0"
app:layout_constraintCircleRadius="100dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
通过这三个的属性
app:layout_constraintCircle="@id/tv0"
app:layout_constraintCircleAngle="30"
app:layout_constraintCircleRadius="100dp"
让一切都变得很简单。