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[英]OnActivityResult always return null Intent data in Android
[英]Android onActivityResult() always return null
我正在尝试将子活动的结果返回给父活动。 这是我在父活动中的代码
private val REQUEST_CODE = 1
override fun onCreate(savedInstanceState: Bundle?) {
startActivityForResult(Intent(this,DescriptionActivity::class.java).apply{
putExtra("EXTRA_FOOD_NAME", foodName)
putExtra("EXTRA_IMAGE", image)
putExtra("EXTRA_FOOD_DESC", foodDesc)
},REQUEST_CODE)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if(requestCode == REQUEST_CODE &&
resultCode == Activity.RESULT_OK){
//It is null when I check it inside here
val orderedFood = intent.getStringExtra("EXTRA_ORDER")
current_oreder.add(orderedFood)
}
}
儿童活动
override fun onCreate(savedInstanceState: Bundle?) {
val foodName = intent.getStringExtra("EXTRA_FOOD_NAME")
btnAddToOrder.setOnClickListener{addToOrder(foodName)}
}
private fun addToOrder(foodName:String?)
{
val orderIntent: Intent = Intent().apply {
putExtra("EXTRA_ORDER", foodName)
}
setResult(Activity.RESULT_OK, orderIntent)
finish()
}
我检查了子活动的 foodName 变量是否具有 null 值,但它具有正确的值。 当我将它返回给父活动时,它变为 null。 我尝试了在互联网上找到的解决方案,但没有奏效。 任何人都可以解决这个问题吗?
在 onActivityResult 方法中使用:
data?.getStringExtra("EXTRA_ORDER")
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if(requestCode == REQUEST_CODE &&
resultCode == Activity.RESULT_OK){
//It is null when I check it inside here
val orderedFood = data?.getStringExtra("EXTRA_ORDER")
current_oreder.add(orderedFood)
}
}
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