英文:
How to partially disable click on home button in Android toolbar?
问题
我已经实现了onOptionsItemSelected以控制主页按钮：
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> {
if (mode) {
reset()
}
}
}
return super.onOptionsItemSelected(item)
}
现在，当我按下主页按钮时，我会返回到上一个片段。我需要的是，如果mode为真，当我点击主页时，仅触发reset()函数，而不返回到上一个片段。如果为假，只需返回。我该如何实现这一点？
英文:
I have implemented onOptionsItemSelected to have control over the home button:
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> {
if (mode) {
reset()
}
}
}
return super.onOptionsItemSelected(item)
}
Now, when I press home, I go back to the previous fragment. What I need is, if the mode is true, when I click on home, to trigger ONLY the reset() function without going back to the previous fragment. If it's false, simply go back. How can I achieve this?
答案1
得分: 2
你应该返回true以告诉父级菜单项的点击已被消耗。
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> {
if (mode) {
reset()
return true
}
}
}
return super.onOptionsItemSelected(item)
}
英文:
You should return true to say the parent that the click on the menu item is consumed.
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> {
if (mode) {
reset()
return true
}
}
}
return super.onOptionsItemSelected(item)
}
</details>
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论