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
添加到muntashir akon和abhijeet的答案,你可以通过在意图中传递值来修改新格式,使其像旧格式一样工作,例如:
// calling class
....
val i = Intent(this@GEBShopActivity, BarcodeScannerActivity::class.java)
when(loadedFragment){
is ShopHomeFragment -> { i.putExtra("myapp.result.code", CODE_ACTIVITY_SCAN_LIST_MAINT) }
is ShopListFragment -> { i.putExtra("myapp.result.code", CODE_ACTIVITY_SCAN_LIST_MAINT) }
is ShopItemMaintFragment -> { i.putExtra("myapp.result.code", CODE_ACTIVITY_SCAN_ITEM_MAINT) }
is ShopPriceFragment -> { i.putExtra("myapp.result.code", CODE_ACTIVITY_PRICE_CAPTURE) }
is ShopCompareFragment -> { i.putExtra("myapp.result.code", CODE_ACTIVITY_PRICE_CAPTURE) }
}
shopFragmentLauncher.launch(i)
....
// called class
....
val resultIntent = Intent()
val bundle = Bundle()
bundle.putStringArrayList("scanned_barcodes", scanned_barcodes)
bundle.putInt("scan_count", scan_count)
resultIntent.putExtras(bundle)
resultIntent.putExtra("myapp.result.code", intent.getIntExtra("myapp.result.code", 0))
setResult(Activity.RESULT_OK, resultIntent)
....
这将允许您保持类的调用相同,只需要额外的一行来添加原始调用的结果代码。还允许您创建一个可重用的启动程序实例。
其他回答
在替换已弃用的方法startActivityForResult(…)时,需要遵循4个简单的步骤。
In place of overridden method onActivityResult(..) - ActivityResultLauncher<Intent> activityResultLaunch = registerForActivityResult( new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() { @Override public void onActivityResult(ActivityResult result) { if (result.getResultCode() == 123) { // ToDo : Do your stuff... } else if(result.getResultCode() == 321) { // ToDo : Do your stuff... } } });
对于多个自定义请求,将条件附加为
if (result.getResultCode() == 123) {
..
} else if(result.getResultCode() == 131){
..
} // so on..
Imports : import androidx.activity.result.ActivityResult; import androidx.activity.result.ActivityResultCallback; import androidx.activity.result.ActivityResultLauncher; import androidx.activity.result.contract.ActivityResultContracts; In place of startActivityForResult(intent, 123), use Intent intent = new Intent(this, SampleActivity.class); activityResultLaunch.launch(intent); In SampleActivity.java class, while returning back to source activity, code will remain the same like - Intent intent = new Intent(); setResult(123, intent); finish();
编码快乐!:)
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
在我的情况下,我试图使用意图,我直接移动到下一个活动,而不使用谷歌登录。
对我有用的是:
在OnCreate中为登录按钮设置onClickListener:
btnSignIn.setOnClickListener {
signIn()
}
private fun signIn() {
val intent = client.signInIntent
mainActivityResultLauncher.launch(intent)
}
在上面的代码中,我写了去下一个活动的意图,但我必须写client.signInIntent
var mainActivityResultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){ result ->
if(result.resultCode == Activity.RESULT_OK){
val data = result.data
val task = GoogleSignIn.getSignedInAccountFromIntent(data)
try {
// Google Sign In was successful, authenticate with Firebase
val account = task.getResult(ApiException::class.java)!!
Log.d(TAG, "firebaseAuthWithGoogle:" + account.id)
firebaseAuthWithGoogle(account.idToken!!)
} catch (e: ApiException) {
// Google Sign In failed, update UI appropriately
Log.w(TAG, "Google sign in failed", e)
}
}
}
如果您正在使用SMS同意API,则使用以下代码(Kotlin):
resultLauncher.launch( consentIntent
)
var resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
if (result.resultCode == Activity.RESULT_OK) {
// There are no request codes
// val data: Intent? = result.data
val message = result.data?.getStringExtra(SmsRetriever.EXTRA_SMS_MESSAGE)
getOtpFromMessage(message)
}
}
以下是我的解决方案:
在我们的项目中,我们有超过20次的startActivityForResult(和onActivityResult)。
我们希望尽可能少地更改代码(并继续使用请求代码),同时引入一个优雅的解决方案以供将来使用。
既然我们很多开发人员都使用BaseActivity概念——为什么不利用它呢?
下面是BaseActivity:
abstract class BaseActivity : AppCompatActivity()
{
private var requestCode: Int = -1
private var resultHandler: ActivityResultLauncher<Intent>? = null
override fun onCreate(savedInstanceState: Bundle?)
{
super.onCreate(savedInstanceState)
registerForActivityResult()
}
private fun registerForActivityResult()
{
if (shouldRegisterForActivityResult())
{
resultHandler = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
onActivityResult(result.data, requestCode, result.resultCode)
this.requestCode = -1
}
}
}
fun startActivityForResult(requestCode: Int, intent: Intent)
{
this.requestCode = requestCode
resultHandler?.launch(intent)
}
protected open fun onActivityResult(data: Intent?, requestCode: Int, resultCode: Int)
{
// For sub activities
}
protected open fun shouldRegisterForActivityResult(): Boolean
{
// Sub activities that need the onActivityResult "mechanism", should override this and return true
return false
}
}
这是SubActivity:
class SubActivity : BaseActivity()
{
companion object
{
private const val SOME_REQUEST_CODE = 300
}
private fun testActivityResult()
{
val intent = Intent(this, OtherActivity::class.java)
startActivityForResult(SOME_REQUEST_CODE, intent)
}
override fun shouldRegisterForActivityResult(): Boolean
{
return true
}
override fun onActivityResult(data: Intent?, requestCode: Int, resultCode: Int)
{
if (requestCode == SOME_REQUEST_CODE)
{
// Yes!
}
}
}
希望它能帮助到别人