应用枚举包含3个适配器在Kotlin的2个活动之间

我不知道是否有人可以帮我解决Main2Activity.kt代表2对象的枚举问题?

我有2个活动之间的连接:网格视图MainActivity.kt的第一个活动,列表视图Main2Activity.kt第二个Main2Activity.kt ,我有MainActivity.kt和( adapter1adapter2 )从Main2Activity.kt 3对象实例( adapter )和我想在MainActivity.kt点击特定图像时传递特定的对象实例

注意:我正在使用BaseAdapter

这是一个MainActivity.kt

 class MainActivity : AppCompatActivity() { var adapter:FoodAdapter?=null var listOfFoods =ArrayList<Food>() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(layout.activity_main) // load foods listOfFoods.add(Food("Coffee"," Coffee preparation is", a)) listOfFoods.add(Food("Coffee"," Coffee preparation is", b)) listOfFoods.add(Food("Coffee"," Coffee preparation is", c)) listOfFoods.add(Food("Coffee"," Coffee preparation is", d)) adapter= FoodAdapter(this,listOfFoods) gvListFood.adapter =adapter } class FoodAdapter: BaseAdapter { var listOfFood= ArrayList<Food>() var context: Context?=null constructor(context:Context,listOfFood:ArrayList<Food>):super(){ this.context=context this.listOfFood=listOfFood } override fun getView(p0: Int, p1: View?, p2: ViewGroup?): View? { val food = this.listOfFood[p0] var inflator = context!!.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater var foodView= inflator.inflate(layout.food_ticket,null) foodView.ivFoodImage.setImageResource(food.image!!) foodView.ivFoodImage.setOnClickListener { if (foodView.ivFoodImage.context!!.equals(a) ) { val intent = Intent(context, Main2Activity::class.java) intent.putExtra(Main2Activity.EXTRA_ADAPTER_MODE, AdapterType.adapter1.ordinal) intent.putExtra("name", food.name!!) intent.putExtra("des", food.des!!) intent.putExtra("image", food.image!!) context!!.startActivity(intent) } else if (foodView.ivFoodImage.context!!.equals(b)) { val intent = Intent(context, Main2Activity::class.java) intent.putExtra(Main2Activity.EXTRA_ADAPTER_MODE, AdapterType.adapter2.ordinal) intent.putExtra("name", food.name!!) intent.putExtra("des", food.des!!) intent.putExtra("image", food.image!!) context!!.startActivity(intent) } } return foodView } override fun getItem(p0: Int): Any { return listOfFood[p0] } override fun getItemId(p0: Int): Long { return p0.toLong() } override fun getCount(): Int { return listOfFood.size } } } 

这是一个Main2Activity.kt

 class Main2Activity : AppCompatActivity() { companion object { val EXTRA_ADAPTER_MODE = "extra_adapter_mode" } var adapter1: FoodAdapter? = null var adapter2: FoodAdapter2? = null var listOfFoods2 = ArrayList<Food>() var listOfFoods3 = ArrayList<Food>() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main2) val bundle = intent?.getIntExtra(EXTRA_ADAPTER_MODE, AdapterType.adapter.ordinal) val adapterType = bundle?.let { AdapterType.fromOrdinal(it) } // val bundle = intent.extras val name = bundle.getString("name") val des = bundle.getString("des") val image = bundle.getInt("image") ivFoodImage2?.let { it.setImageResource(image) } tvName2?.let { it.text = name } tvDes2?.let { it.text = des } // load foods2 listOfFoods2.add(Food("Coffee", " Coffee1 preparation is", R.drawable.a)) listOfFoods2.add(Food("Coffee", " Coffee2 preparation is", R.drawable.b)) //listOfFoods2.add(Food("Coffee"," Coffee preparation is",R.drawable.c)) //listOfFoods2.add(Food("Coffee"," Coffee preparation is",R.drawable.d)) // load foods3 //listOfFoods3.add(Food("Coffee"," Coffee preparation is",R.drawable.a)) //listOfFoods3.add(Food("Coffee"," Coffee preparation is",R.drawable.b)) listOfFoods3.add(Food("Coffee", " Coffee3 preparation is", R.drawable.c)) listOfFoods3.add(Food("Coffee", " Coffee4 preparation is", R.drawable.d)) if(adapter1 ==lvFoods2.adapter) { adapter1 = FoodAdapter(listOfFoods2, this) lvFoods2.adapter = adapter1 } else if (adapter2==lvFoods2.adapter) { adapter2 = FoodAdapter2(listOfFoods3, this) lvFoods2.adapter = adapter2 } } class FoodAdapter : BaseAdapter { var context: Context? = null var listOfFoodsLocal2 = ArrayList<Food>() constructor(listOfFoods2: ArrayList<Food>, context: Context) : super() { this.listOfFoodsLocal2 = listOfFoods2 this.context = context } override fun getView(p0: Int, p1: View?, p2: ViewGroup?): View { val food = this.listOfFoodsLocal2[p0] var inflator = context!!.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater val foodView = inflator.inflate(R.layout.food_ticket2, null) foodView.ivFoodImage2?.let { it.setImageResource(food.image!!) } foodView.tvName2?.let { it.text = food.name!! } foodView.tvDes2?.let { it.text = food.des!! } foodView.ivFoodImage2.setOnClickListener { //move to next val intent = Intent(context, FoodDetails::class.java) intent.putExtra("name", food.name!!) intent.putExtra("des", food.des!!) intent.putExtra("image", food.image!!) context!!.startActivity(intent) } return foodView } override fun getItem(p0: Int): Any { return listOfFoodsLocal2[p0] } override fun getItemId(p0: Int): Long { return p0.toLong() } override fun getCount(): Int { return listOfFoodsLocal2.size } } class FoodAdapter2 : BaseAdapter { var context: Context? = null var listOfFoodsLocal3 = ArrayList<Food>() constructor(listOfFoods3: ArrayList<Food>, context: Context) : super() { this.listOfFoodsLocal3 = listOfFoods3 this.context = context } override fun getView(p0: Int, p1: View?, p2: ViewGroup?): View { val food = this.listOfFoodsLocal3[p0] var inflator = context!!.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater val foodView = inflator.inflate(R.layout.food_ticket2, null) foodView.ivFoodImage2?.let { it.setImageResource(food.image!!) } foodView.tvName2?.let { it.text = food.name!! } foodView.tvDes2?.let { it.text = food.des!! } foodView.ivFoodImage2.setOnClickListener { //move to next val intent = Intent(context, FoodDetails::class.java) intent.putExtra("name", food.name!!) intent.putExtra("des", food.des!!) intent.putExtra("image", food.image!!) context!!.startActivity(intent) } return foodView } override fun getItem(p0: Int): Any { return listOfFoodsLocal3[p0] } override fun getItemId(p0: Int): Long { return p0.toLong() } override fun getCount(): Int { return listOfFoodsLocal3.size } } } 

这里是枚举类

 enum class AdapterType { adapter, adapter1, adapter2; companion object { fun fromOrdinal(ordinal: Int): AdapterType? { return AdapterType.values().firstOrNull { it.ordinal == ordinal } } } } 

第一个活动图像

适配器枚举类

第二活动图像

你只需要像其他信息一样在你的包中发送它

 intent.putExtra(Main2Activity.EXTRA_ADAPTER_MODE, AdapterType.ADAPTER_TYPE_1.toOrdinal()) 

然后从第二个Activity中的包中获取它

 val adapterTypeOrdinal = intent.getIntExtra(EXTRA_ADAPTER_MODE, 0) // 0 is the default value val type = AdapterType.fromOrdinal(adapterTypeOrdinal)