写在前面
RecycleView
日历UI——XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="33dp"
android:orientation="horizontal"
android:paddingRight="15dp"
android:paddingLeft="15dp"
app:layout_constraintLeft_toLeftOf="parent"
>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="日" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="一"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="二"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="三"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="四"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="五"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#999999"
android:gravity="center"
android:text="六"
/>
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/sign"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingRight="15dp"
android:paddingLeft="15dp"
tools:itemCount="35"
tools:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
tools:listitem="@layout/sign_item_activity"
tools:spanCount="7"/>
<Button
android:layout_width="100dp"
android:layout_height="50dp"
android:layout_gravity="center"
android:text="签到"/>
</LinearLayout>

<?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:background="#F5F5F5"
android:layout_height="60dp"
tools:ignore="MissingDefaultResource"
tools:layout_width="47dp">
<TextView
android:id="@+id/sign_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="1"
android:textColor="#434343"
android:textSize="18dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/sign_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="已签"
android:textColor="#999999"
android:textSize="10dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/sign_date" />
<TextView
android:id="@+id/sign_number"
android:layout_width="10dp"
android:layout_height="10dp"
android:background="#0B7BFD"
android:gravity="center"
android:text="5"
android:textColor="#FFFFFF"
android:textSize="7dp"
app:layout_constraintCircle="@+id/sign_date"
app:layout_constraintCircleAngle="45"
app:layout_constraintCircleRadius="15dp"
app:layout_constraintLeft_toRightOf="@id/sign_date"
app:layout_constraintTop_toTopOf="parent" />
<View
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:background="#FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_width="1dp"
android:layout_height="0dp"/>
<View
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="#FFFFFF"
android:layout_width="0dp"
android:layout_height="1dp"/>
</androidx.constraintlayout.widget.ConstraintLayout>

Adapter
data class SignIn (val sign_date : String , val sign_number : String, val sign_state : String?) : Serializable
class SignInAdapter(val SingInList: List<SingIn>): RecyclerView.Adapter<SignInAdapter.ViewHolder>(){
inner class ViewHolder (view: View):RecyclerView.ViewHolder(view) {
val sign_date = view.findViewById<TextView>(R.id.sign_date)
val sign_number = view.findViewById<TextView>(R.id.sign_number)
val sign_state = view.findViewById<TextView>(R.id.sign_state)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.sign_item_activity, parent, false)
val holder = ViewHolder(view)
return holder
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val item = SingInList[position]
println(SingInList[position].toString())
holder.sign_date.text = item.sign_date
holder.sign_number.text = item.sign_number
holder.sign_state.text = item.sign_state
}
override fun getItemCount(): Int {
return SingInList.size;
}
}

SignActivity
class SignInActivity: BaseActivity() {
final var logTag = LogTag("SigInActivity")
lateinit var adapter : SignInAdapter
var list = ArrayList<SingIn>()
private lateinit var inflater : LayoutInflater
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.signin_main_activity)
initDate();
sign.layoutManager = GridLayoutManager(this,7)
adapter = SignInAdapter(list)
sign.adapter = adapter
}
private fun initDate(){
var index : Int = 1;
while (true){
if (list.size == 35){
break
}
list.add(SingIn("1","5","已签"))
index++;
}
}
}