我最近发现onActivityResult已弃用。我们该怎么处理呢?
有什么替代方案吗?
我最近发现onActivityResult已弃用。我们该怎么处理呢?
有什么替代方案吗?
当前回答
Kotlin版本的@Muntashir阿肯解决方案
class BetterActivityResult<Input, Result> private constructor(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
var onActivityResult : ((Result) -> Unit)?,
) {
private val launcher : ActivityResultLauncher<Input> =
caller.registerForActivityResult(contract) { onActivityResult?.invoke(it) }
/**
* Launch activity, same as [ActivityResultLauncher.launch] except that it
* allows a callback
* executed after receiving a result from the target activity.
*/
/**
* Same as [.launch] with last parameter set to `null`.
*/
@JvmOverloads
fun launch(
input : Input,
onActivityResult : ((Result) -> Unit)? = this.onActivityResult,
) {
this.onActivityResult = onActivityResult
launcher.launch(input)
}
companion object {
/**
* Register activity result using a [ActivityResultContract] and an in-place
* activity result callback like
* the default approach. You can still customise callback using [.launch].
*/
fun <Input, Result> registerForActivityResult(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
onActivityResult : ((Result) -> Unit)?,
) : BetterActivityResult<Input, Result> {
return BetterActivityResult(caller, contract, onActivityResult)
}
/**
* Same as [.registerForActivityResult] except
* the last argument is set to `null`.
*/
fun <Input, Result> registerForActivityResult(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
) : BetterActivityResult<Input, Result> {
return registerForActivityResult(caller, contract, null)
}
/**
* Specialised method for launching new activities.
*/
fun registerActivityForResult(
caller : ActivityResultCaller,
) : BetterActivityResult<Intent, ActivityResult> {
return registerForActivityResult(caller, StartActivityForResult())
}
}
}
其他回答
参考:Kotlin -从图库中选择图像
迄今为止我发现的最简单的Alernative
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.id.activity_main)
var ivPhoto = findViewById<ImageView>(R.id.ivPhoto)
var btnChoosePhoto = findViewById<Button>(R.id.btnChoosePhoto)
val getContent = registerForActivityResult(ActivityResultContracts.GetContent()) { uri: Uri? ->
ivPhoto.setImageURI(uri) // Handle the returned Uri
}
btnChoose.setOnClickListener {
getContent.launch("image/*")
}
}
ActivityResultLauncher<Intent> someActivityResultLauncher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if (result.getResultCode() == Activity.RESULT_OK) {
}
}
});
似乎onActivityResult在超类中已弃用,但你在你的问题中没有提到超类名称和compileSdkVersion。
在Java和Kotlin中,只要添加@Deprecated,每个类或方法都可以标记为deprecated,所以检查你的超类,你可能扩展了一个错误的类。
当一个类被弃用时,它的所有方法也被弃用。
要看到一个快速的解决方案,点击弃用的方法,并按Ctrl+Q在Android工作室查看方法的文档,应该有一个解决方案。
在我使用androidx和API 29作为compileSdkVersion的项目中,此方法在活动和片段中不弃用
onActivityResult, startActivityForResult, requestPermissions和onRequestPermissionsResult从1.3.0-alpha04开始在androidx.fragment上被弃用,android.app.Activity上没有。 相反,你可以使用registerForActivityResult的活动结果api。
Kotlin版本的@Muntashir阿肯解决方案
class BetterActivityResult<Input, Result> private constructor(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
var onActivityResult : ((Result) -> Unit)?,
) {
private val launcher : ActivityResultLauncher<Input> =
caller.registerForActivityResult(contract) { onActivityResult?.invoke(it) }
/**
* Launch activity, same as [ActivityResultLauncher.launch] except that it
* allows a callback
* executed after receiving a result from the target activity.
*/
/**
* Same as [.launch] with last parameter set to `null`.
*/
@JvmOverloads
fun launch(
input : Input,
onActivityResult : ((Result) -> Unit)? = this.onActivityResult,
) {
this.onActivityResult = onActivityResult
launcher.launch(input)
}
companion object {
/**
* Register activity result using a [ActivityResultContract] and an in-place
* activity result callback like
* the default approach. You can still customise callback using [.launch].
*/
fun <Input, Result> registerForActivityResult(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
onActivityResult : ((Result) -> Unit)?,
) : BetterActivityResult<Input, Result> {
return BetterActivityResult(caller, contract, onActivityResult)
}
/**
* Same as [.registerForActivityResult] except
* the last argument is set to `null`.
*/
fun <Input, Result> registerForActivityResult(
caller : ActivityResultCaller,
contract : ActivityResultContract<Input, Result>,
) : BetterActivityResult<Input, Result> {
return registerForActivityResult(caller, contract, null)
}
/**
* Specialised method for launching new activities.
*/
fun registerActivityForResult(
caller : ActivityResultCaller,
) : BetterActivityResult<Intent, ActivityResult> {
return registerForActivityResult(caller, StartActivityForResult())
}
}
}