应用枚举由Kotlin中2个活动之间的3个适配器组成 [英] Applying enum consist of 3 adapters between 2 activities in Kotlin
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问题描述
我想知道是否有人可以帮助我解决Main2Activity.kt中代表2个对象的枚举问题?
I wonder if somebody can help me to solve enum problem for represent 2 object inside Main2Activity.kt?
我有2个活动可以在以下两者之间建立联系:
网格视图MainActivity.kt的第一项活动，列表视图Main2Activity.kt的第二项活动，我有3个对象实例(adapter)，分别来自MainActivity.kt和(adapter1，adapter2)，而我想通过单击MainActivity.kt
I have 2 activities to connect between the:
The first activity for Grid View MainActivity.kt, second for List View Main2Activity.ktand I have 3 object instance (adapter) from MainActivity.kt and (adapter1,adapter2) from Main2Activity.kt and i wanna pass specific object instance when click on specific image in the MainActivity.kt
注意:我正在使用BaseAdapter.
这是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
}
}
}
这是枚举类
enum class AdapterType {
adapter,
adapter1,
adapter2;
companion object {
fun fromOrdinal(ordinal: Int): AdapterType? {
return AdapterType.values().firstOrNull { it.ordinal == ordinal }
}
}
}
推荐答案
您只需像其他信息一样将其发送到捆绑包中
You just have to send it in your bundle like the other informations
intent.putExtra(Main2Activity.EXTRA_ADAPTER_MODE, AdapterType.ADAPTER_TYPE_1.toOrdinal())
，然后在第二个活动中从捆绑软件中获取
and then get it from the bundle in your second Activity
val adapterTypeOrdinal = intent.getIntExtra(EXTRA_ADAPTER_MODE, 0) // 0 is the default value
val type = AdapterType.fromOrdinal(adapterTypeOrdinal)
这篇关于应用枚举由Kotlin中2个活动之间的3个适配器组成的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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