android-fragments

问题 I have an app with one activity and two fragments, And I navigate using jetpack navigation. In my "Main" fragment, I've a button that trigger function inside the viewModel: edit_text_button.setOnClickListener { homeViewModel.onButtonClicked() } onButtonClicked inside viewModel , basically shuffle the list and trigger observer in main fragment. fun onButtonClicked() { initList = (1..9).shuffled() _list.value = initList } My question is: How can I pass every time the updated list to the second

问题 I have checked similar posts and their solutions do not seem to work. I am (obviously) new to this, so it may just be a lack of skill on my part. I am receiving the error: "Wrong 2nd argument type Found:'mycompany.fragment_test... required: 'android.support.v4.app.Fragment replace (int, android.support.v4.ap.Fragment) to (int, mycompany.fragment_test...)' import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentTransaction; import android.support.v4.app

问题 I have checked similar posts and their solutions do not seem to work. I am (obviously) new to this, so it may just be a lack of skill on my part. I am receiving the error: "Wrong 2nd argument type Found:'mycompany.fragment_test... required: 'android.support.v4.app.Fragment replace (int, android.support.v4.ap.Fragment) to (int, mycompany.fragment_test...)' import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentTransaction; import android.support.v4.app

问题 I've seen some apps like Pocket that can toggle between Day and Night mode in the settings instantly without reloading, but I'm not able to do that in my own example: public class SettingsActivity extends PreferenceActivity { @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); getFragmentManager().beginTransaction().replace(android.R.id.content, new PrefsFragment()).commit(); } public static class PrefsFragment extends PreferenceFragment{

问题 I am new in Android and I don't really understand why a Fragment 's content which was added dynamically (for example some image which was added after a button click) is disappearing after scrolling some count of Fragment s and then come back. There is really simple code Activity and Fragment : public class MyActivity extends FragmentActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ViewPager

问题 I have 5 fragments (home, settings, newPost, notifications and profile) inside my Main2Activity. Inside HomeFragment I have a RecyclerView with a lot of post views, every post containing an "open" button which should open a PostFragment . After the PostFragment is opened I have 3 options to go back to HomeFragment : by tapping phone's 'back' button, tapping my post's XML "back" button or tapping Home from the bottomNavView . The problem is that after PostFragment disappears and my screen goes

问题 I have 5 fragments (home, settings, newPost, notifications and profile) inside my Main2Activity. Inside HomeFragment I have a RecyclerView with a lot of post views, every post containing an "open" button which should open a PostFragment . After the PostFragment is opened I have 3 options to go back to HomeFragment : by tapping phone's 'back' button, tapping my post's XML "back" button or tapping Home from the bottomNavView . The problem is that after PostFragment disappears and my screen goes

问题 I am creating a chat app. So trying to send logged in username and one of the the user from userlist to a Fragment which receives these Strings and accordingly saves data as user_chatbuddy child in firebase. The data put in bundle does show same values on Toast when is use "bundle.toString()" on Toast. However the getArguements() in the sendMsgFragment is getting only null values. Here are the relevant codes - UsersList.java code - usersList.setOnItemClickListener(new AdapterView

问题 I am creating a chat app. So trying to send logged in username and one of the the user from userlist to a Fragment which receives these Strings and accordingly saves data as user_chatbuddy child in firebase. The data put in bundle does show same values on Toast when is use "bundle.toString()" on Toast. However the getArguements() in the sendMsgFragment is getting only null values. Here are the relevant codes - UsersList.java code - usersList.setOnItemClickListener(new AdapterView

问题 I have 3 fragments in my App.1 fragment is having webview. I am using recyclerview.Using onclick method to switch between fragments. FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); fragmentTransaction.replace(R.id.fragment, fragment); fragmentTransaction.commit(); I tried below code to save state of fragment public void onSaveInstanceState(@NonNull Bundle outState) { super.onSaveInstanceState(outState); webView.saveState(outState); } public void