Android_Review_1_app

我的媽祖關公孫悟空卡通版本的抽籤應用程式（看看今日運勢如何，祝你好手氣！）

• 畫面佈局

    <?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/rollResultTxt"
            android:gravity="center_horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            android:textSize="30dp"
            app:layout_constraintBottom_toTopOf="@+id/rollResultImg"
            />
  
  
        <ImageView
            android:id="@+id/rollResultImg"
            android:layout_marginTop="100dip"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
  
    </androidx.constraintlayout.widget.ConstraintLayout>
  

• 邏輯撰寫

     package com.katepatty.luckyroller
  
  import androidx.appcompat.app.AppCompatActivity
  import android.os.Bundle
  import android.util.Log.d
  import android.widget.ImageView
  import android.widget.TextView
  import kotlinx.android.synthetic.main.activity_main.*
  
  class MainActivity : AppCompatActivity() {
  
      override fun onCreate(savedInstanceState: Bundle?) {
          super.onCreate(savedInstanceState)
          setContentView(R.layout.activity_main)
  
          roller()
  
      }
  
      private fun roller(){
  
          // 宣告容器變數
          val outputStr: TextView = findViewById(R.id.rollResultTxt)
          val outputImg: ImageView = findViewById(R.id.rollResultImg)
  
          // 生出隨機值
          val randomInt = (1..5).random()
  
          // 將隨機值指派給容器變數的屬性中
          //outputStr.text = randomInt.toString()
          //rollResultTxt. got its method too
  
          val randomTxt = when (randomInt){
  
              1 -> "好運連連"
              2 -> "貴人加持"
              3 -> "喜憂參半"
              else -> "請回府，記得拜拜喔！下次再來玩～"
  
          }
  
          val randomSrc = when (randomInt) {
  
              1 -> R.drawable.notbad
              2 -> R.drawable.luck
              3 -> R.drawable.gotpower
              else -> R.drawable.home
  
          }
          // below resId = 容器變數放回呼值
          outputImg.setImageResource(randomSrc)
          outputStr.setText(randomTxt)
  
      }
  }