android-layout

问题 I have to build a more complex custom view in Android. The final layout should look like this: <RelativeLayout> <SomeView /> <SomeOtherView /> <!-- maybe more layout stuff here later --> <LinearLayout> <!-- the children --> </LinearLayout> </RelativeLayout> However, in the XML files I just want do define this (without defining SomeView, SomeOtherView etc.): <MyCustomView> <!-- the children --> </MyCustomView> Is this possible in Android, and if yes: What would be the cleanest way to do it?

问题 SO i have to classes CollegeSearch.kt and CollegeSwitcher.kt The first one make use of a recyclerview to put up a list for people to use and select a country. When they tap on it, I want the layout to switch by switching the class. here is the CollegeSearch.kt class: class CollegeSearch : AppCompatActivity() { var college_DU:MutableList<String> = ArrayList() var displayList:MutableList<String> = ArrayList() override fun onCreate(savedInstanceState: Bundle1?) { super.onCreate

问题 I tried this answer: How to search content of strings stored in XML file?: companion object { val TAG: String = "EffectsDescription" fun fromStringsXml(string: String, context: Context): String { val ss = string.toLowerCase().replace(" ", "_"); Log.d(TAG, "gonna search for " + ss); val s = searchForString(ss, context); Log.d(TAG, "found: " + s); return s ?: "ERROR" } private fun searchForString(message: String, context: Context): String? { return try { val resId: Int = context.resources

问题 Actual Code: My Main Activity: class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMainBinding.inflate(layoutInflater) val rollButton = binding.rollButton rollButton.setOnClickListener { rollDice() } setContentView(binding.root) } private fun rollDice() { val randomDiceRoll = Random.nextInt(6) + 1 Toast.makeText(this, randomDiceRoll.toString(),

问题 I have a HomeActivity that implements NavigationView without ToolBar (with ActionBar). In this activity I implement the onNavigationItemSelected that I use to navigate to SettingsFragment : protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_menu); ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setHomeButtonEnabled(true); } // more code

问题 We are facing issue related manifest marge after changed in merged file error is: "The prefix "tools" for attribute "tools:node" associated with an element type "uses-permission" is not bound." Why this error occur and how to solve this ? We are trying to add line in application tag for override but not solve ,searching more all gives answer to add line in top for tools added this but also not solve. After replace manifest with old files but also giving same error. <?xml version="1.0"

问题 We are facing issue related manifest marge after changed in merged file error is: "The prefix "tools" for attribute "tools:node" associated with an element type "uses-permission" is not bound." Why this error occur and how to solve this ? We are trying to add line in application tag for override but not solve ,searching more all gives answer to add line in top for tools added this but also not solve. After replace manifest with old files but also giving same error. <?xml version="1.0"

问题 In my android app I have one activity to show a RecyclerView in which each row is composed by a TextView and 2 buttons. Just like that: Well, following many explanations of internet I have made this Adapter: public class ListAdapter extends RecyclerView.Adapter<ListAdapter.ViewHolder> { private LayoutInflater layoutInflater; protected Vector<List> lists; public ListAdapter(Context context, Vector lists) { layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER

问题 Questions Q1 : Has anyone managed to get custom string/enum attribute working in xml selectors? I got a boolean attribute working by following [1], but not a string attribute. EDIT: Thanks for answers. Currently android supports only boolean selectors. See accepted answer for the reason. I'm planning to implement a little complex custom button, whose appearance depends on two variables. Other will be a boolean attribute (true or false) and another category-like attribute (has many different

问题 Questions Q1 : Has anyone managed to get custom string/enum attribute working in xml selectors? I got a boolean attribute working by following [1], but not a string attribute. EDIT: Thanks for answers. Currently android supports only boolean selectors. See accepted answer for the reason. I'm planning to implement a little complex custom button, whose appearance depends on two variables. Other will be a boolean attribute (true or false) and another category-like attribute (has many different