Develop Reference

Navigation up clicked

Previously I used onCreateOptionsMenu and onSupportNavigationUp.
Now I use MenuProvide. To check if navigation up was clicked I check id - "android.R.id.home". While it works, I'm not sure this is the right approach?
override fun onCreate(savedInstanceState: Bundle?) {
WindowCompat.setDecorFitsSystemWindows(window, false)
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
setSupportActionBar(binding.toolbar)
val navController = findNavController(R.id.nav_host_fragment_content_main)
appBarConfiguration = AppBarConfiguration(navController.graph)
setupActionBarWithNavController(navController, appBarConfiguration)
addMenuProvider(object : MenuProvider {
override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
menuInflater.inflate(R.menu.menu_main, menu)
}
override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
Log.d(TAG, "onMenuItemSelected: {${menuItem.itemId}}")
return when (menuItem.itemId) {
android.R.id.home -> {
navController.navigateUp(appBarConfiguration)
}
else -> {
true
}
}
}
})
}

Android Activity to another Activity, while you have setting activity

I am trying to go to another activity, but my setting activity is preventing to go there. How do I fix that?
class MainActivity : AppCompatActivity() {
private var gettext: EditText? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
gettext = findViewById(R.id.text2)
// val intent = intent
val action = intent.action
val type = intent.type
val button = findViewById<Button>(R.id.button_submit)
//this part is what I want to go to another activity, while still have setting activity
button.setOnClickListener {
val intent = Intent(this,com.example.testing1.DecryptVerify::class.java)
startActivity(intent)
}
if (Intent.ACTION_SEND == action && type != null) {
handleSendText(intent)
}
}
private fun handleSendText(intent: Intent) {
val sharedText = intent.getStringExtra(Intent.EXTRA_TEXT)
if (sharedText != null) {
// showing the text in edittext
gettext?.setText(sharedText)
}
}
//I want to stay, while when I run it and click button on the top one
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
R.id.action_settings -> {
val intent = Intent(this, com.example.testing1.SettingsActivity::class.java
)
startActivity(intent)
}
}
return super.onOptionsItemSelected(item)
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
val menuInflater = menuInflater
menuInflater.inflate(R.menu.main_menu, menu)
return super.onCreateOptionsMenu(menu)
}
}
Do I need to some form if-else?

AddActivity delete all command in menu bar

override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
R.id.action_delete_all -> {
val intent = Intent(this, StatsActivity::class.java)
startActivity(intent)
true
}
else -> super.onOptionsItemSelected(item)
}
}

Unable to use setOnClickListener on button in fragment

I have tried to add an setOnClickListener in my Fragment. But both methods i tried didnt work. There is no readction to my button press in the App.
class LoginFragment: Fragment(), View.OnClickListener {
//AuthVariable for global use
private lateinit var myAuth: FirebaseAuth
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
var view = inflater.inflate(R.layout.content_login, container, false)
view?.login_button?.setOnClickListener(this)
return view
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
override fun onClick(p0: View?) {
Log.i("BUTTON123","TEST")
loginUser()
}
}
Activity:
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
//AuthVariable for global use
private lateinit var myAuth : FirebaseAuth
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setSupportActionBar(toolbar)
val toggle = ActionBarDrawerToggle(
this, drawer_layout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)
drawer_layout.addDrawerListener(toggle)
toggle.syncState()
nav_view.setNavigationItemSelectedListener(this)
//Initializing FirebaseAuth Instance
myAuth = FirebaseAuth.getInstance()
var user = myAuth.currentUser
if(user != null){
updateUI(user)
}else{
val test = supportFragmentManager
val frag = LoginFragment()
test.beginTransaction().replace(R.id.placeholder,frag).addToBackStack(null).commit()
}
}
override fun onBackPressed() {
if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
drawer_layout.closeDrawer(GravityCompat.START)
} else {
super.onBackPressed()
}
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
// Inflate the menu; this adds items to the action bar if it is present.
menuInflater.inflate(R.menu.main, menu)
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
when (item.itemId) {
R.id.action_settings -> return true
else -> return super.onOptionsItemSelected(item)
}
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
// Handle navigation view item clicks here.
when (item.itemId) {
R.id.nav_addShop -> {
//Activity to Add your Shop
val addshopIntent = Intent(this,AddShopActivity::class.java)
startActivity(addshopIntent)
}
R.id.nav_searchShop -> {
//SearchFragment
val test = supportFragmentManager
val frag = test()
test.beginTransaction().replace(R.id.placeholder,frag).addToBackStack(null).commit()
}
R.id.nav_shopMap -> {
//MapActivity
val mapintent = Intent(this, ShopMap::class.java)
startActivity(mapintent)
}
R.id.nav_manage -> {
}
R.id.nav_share -> {
}
R.id.nav_logout -> {
myAuth.signOut()
updateUI(myAuth.currentUser)
}
}
drawer_layout.closeDrawer(GravityCompat.START)
return true
}
}

Did you forget the onClick() method in LoginFragment?
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
val view: View = inflater.inflate(R.layout.content_login, container, false)
view.login_button.setOnClickListener {
Log.i("BUTTON123","TEST")
loginUser()
}
return view
}

Open ContextMenu from MenuItem click

I need to open a context menu on MenuItem click. How can i do this? I've tried to do this on BottomNavigationView.OnNavigationItemSelectedListener:
registerForContextMenu(menuItem.actionView)
openContextMenu(menuItem.actionView)
but the actionView in null.
Thanks a lot.
Main Activity:
class MainActivity : AppCompatActivity(){
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
navigation.selectedItemId = R.id.navigation_dashboard
}
}
private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item ->
when (item.itemId) {
...
R.id.navigation_add -> {
registerForContextMenu(menuItem.actionView)
openContextMenu(item.actionView)
return#OnNavigationItemSelectedListener true
}
}
false
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
navigation.selectedItemId = R.id.navigation_dashboard
}
override fun onCreateContextMenu(menu: ContextMenu, v: View,
menuInfo: ContextMenuInfo) {
...
}
override fun onContextItemSelected(item: MenuItem): Boolean {
...
}