Comments (9)
各自点击两次后就不能响应点击事件了??? 你是想说在 activity 监听的 livedata 无法接受到点击事件吧。
from binding.
activity 包含两个fragment ,需要共享 activity 的 ViewModel 的,才可以进行通信,这部分内容详见 Google 文档: https://developer.android.com/topic/libraries/architecture/viewmodel?hl=zh-cn#sharing
from binding.
各自点击两次后就不能响应点击事件了??? 你是想说在 activity 监听的 livedata 无法接受到点击事件吧。
我在按钮的点击监听中断点,每个按钮就前两次响应了点击,后面就没反应了,两个fragment都是共享的activity的viewmodel。 然后就是我测试了下官方的使用方式,发现可以正常响应
from binding.
各自点击两次后就不能响应点击事件了??? 你是想说在 activity 监听的 livedata 无法接受到点击事件吧。
我在按钮的点击监听中断点,每个按钮就前两次响应了点击,后面就没反应了,两个fragment都是共享的activity的viewmodel。 然后就是我测试了下官方的使用方式,发现可以正常响应
方便贴一下 activity 和 fragment 点击相关的代码吗?
from binding.
各自点击两次后就不能响应点击事件了??? 你是想说在 activity 监听的 livedata 无法接受到点击事件吧。
我在按钮的点击监听中断点,每个按钮就前两次响应了点击,后面就没反应了,两个fragment都是共享的activity的viewmodel。 然后就是我测试了下官方的使用方式,发现可以正常响应
方便贴一下 activity 和 fragment 点击相关的代码吗?
Activity
-
`class LoginActivity : AppCompatActivity() {
//当前显示的fragment
private lateinit var curFragment: Fragment
private lateinit var pawLoginFragment: Fragment
private lateinit var codeLoginFragment: Fragment
private val viewModel by lazy { ViewModelProvider(this).get(LoginViewModel::class.java) }
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_login)
onObserve()
codeLoginFragment = CodeLoginFragment()
pawLoginFragment = PawLoginFragment()
curFragment = codeLoginFragmentsupportFragmentManager .beginTransaction() .add(R.id.lay_container, curFragment) .commit()
}
private fun onObserve() {
viewModel.skipLoginView.observe(this, {
val fragment: Fragment =
if (curFragment == codeLoginFragment)
pawLoginFragment
else
codeLoginFragmentcurFragment = fragment supportFragmentManager .beginTransaction() .replace(R.id.lay_container, fragment) .commit() })
}
}`
ViewModel
-
`class LoginViewModel : ViewModel() {
val skipLoginView = MutableLiveData()fun skipLoginView(string: String) {
this.skipLoginView.value = string
}
}`
Fragment 1
-
`class CodeLoginFragment : Fragment() {
private val viewModel by lazy { ViewModelProvider(activity!!).get(LoginViewModel::class.java) }private val binding: FragmentCodeLoginBinding by viewbind()
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
return inflater.inflate(R.layout.fragment_code_login, container, false)
}override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)binding.btnSkip.setOnClickListener { viewModel.skipLoginView("CODE") }
}
}`
Fragment 2
-
`class PawLoginFragment : Fragment() {
private val binding: FragmentPawLoginBinding by viewbind()
private val viewModel by lazy { ViewModelProvider(activity!!).get(LoginViewModel::class.java) }
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
return inflater.inflate(R.layout.fragment_paw_login, container, false)
}override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)binding.btnSkip.setOnClickListener { viewModel.skipLoginView("PAW") }
}
}`
按钮
<Button android:text="SKIP" android:id="@+id/btn_skip" android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" />
from binding.
按照你的例子,我写了一个,我这边可以正常切换的, 以下写法 java 和 kotlin
ViewBindActivity.kt
class ViewBindActivity : AppCompatActivity() {
val binding: ActivityViewBindBinding by viewbind()
// java
val loginViewModel: LoginViewModel by lazy { ViewModelProvider(this).get(LoginViewModel::class.java) }
// kotlin
// val loginViewModel: LoginViewModel by viewModels()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding.apply {
loginViewModel.liveData.observe(this@ViewBindActivity) {
if (it.equals("login")) {
addFragment(LoginFragment())
} else {
addFragment(ViewBindFragment())
}
}
addFragment(ViewBindFragment())
}
}
private fun addFragment(fragment: Fragment) {
supportFragmentManager.beginTransaction()
.replace(R.id.container, fragment)
.commit()
}
}
ViewBindFragment.kt
class ViewBindFragment : Fragment(R.layout.fragment_view_bind){
// java
private val loginViewModel by lazy { ViewModelProvider(requireActivity()).get(LoginViewModel::class.java) }
// kotlin
private val loginViewModel by activityViewModels()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
btnLogin.setOnClickListener{
loginViewModel.liveData.value = "login"
}
}
}
LoginFragment.kt
class LoginFragment : Fragment(R.layout.fragment_login){
// java
private val loginViewModel by lazy { ViewModelProvider(requireActivity()).get(LoginViewModel::class.java) }
// kotlin
private val loginViewModel by activityViewModels()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
btnViewBind.setOnClickListener{
loginViewModel.liveData.value = "viewBind"
}
}
}
from binding.
loginViewModel.liveData.observe(this@ViewBindActivity) {
if (it.equals("login")) {
addFragment(LoginFragment())
} else {
addFragment(ViewBindFragment())
}
}
你这儿的addFragment(fragment)里面每次都是给的一个新的对象,不给新的对象就不行。
from binding.
问题【点击两次后就不能响应点击事件了】
这里,为了方便,我这是根据demo 里面的代码改的,只要能接受到消息,执行显示隐藏就可以了,我这里点击了很多次,都是正常的
from binding.
我看你的代码里面
supportFragmentManager
.beginTransaction()
.replace(R.id.lay_container, fragment)
.commit()
如果只是切换显示的话,不用调用 replease, 调用 show 和 hide 即可
from binding.
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from binding.