android-fragments

问题 I am developing a job estimation app which stores information in a room database and holds a reference to it via a RecyclerView which user can use to access the data and make changes if needed. I am retrieving a reference to the information using Live Data via a view model with Observer method inside a Fragment. This information is stored in a database when the user completes a form and presses the save button. Currently I have developed two standard adapters, with different data sets and

问题 I am developing a job estimation app which stores information in a room database and holds a reference to it via a RecyclerView which user can use to access the data and make changes if needed. I am retrieving a reference to the information using Live Data via a view model with Observer method inside a Fragment. This information is stored in a database when the user completes a form and presses the save button. Currently I have developed two standard adapters, with different data sets and

问题 I need to set the start destination of a navigation graph programmatically depending on a condition. I have Fragment0, and also Fragment1, Fragment2, ... FragmentN all extending Fragment0, and being all of them (including Fragment0) able to be that wished start destination . I already know there is the method from NavGraph called setStartDestination(R.id.nav_fragment_X); but it is not useful for me because, if I am not wrong, it requires to have all these fragment0...N nodes declared in the

问题 I need to set the start destination of a navigation graph programmatically depending on a condition. I have Fragment0, and also Fragment1, Fragment2, ... FragmentN all extending Fragment0, and being all of them (including Fragment0) able to be that wished start destination . I already know there is the method from NavGraph called setStartDestination(R.id.nav_fragment_X); but it is not useful for me because, if I am not wrong, it requires to have all these fragment0...N nodes declared in the

问题 When I try to load a URL in the WebView it only shows a blank screen. If I load https://www.google.com or https://www.facebook.com it is working fine. package com.example.hp.cccapp; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.webkit.WebView; import android.webkit.WebViewClient; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R

问题 When I try to load a URL in the WebView it only shows a blank screen. If I load https://www.google.com or https://www.facebook.com it is working fine. package com.example.hp.cccapp; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.webkit.WebView; import android.webkit.WebViewClient; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R

问题 I have a class BottomSheetFragment extends BottomSheetDialogFragment , which contains sub-fragments, and I call it from a fragment. The problem is that when I call it the second time, my app crashes with Binary XML file line #69: Duplicate id 0x7f090071, tag null, or parent id 0xffffffff with another fragment error. Bottom sheet class: public class BottomSheetFragment extends BottomSheetDialogFragment { public BottomSheetFragment() { // Required empty public constructor } @Override public

问题 I'm working on an android project and my fragment are not working... I'm trying to have this kind of UI -> http://developer.android.com/training/basics/fragments/fragment-ui.html However my second fragment doesn't replace or hide the first one, it's simply going under it! This is how I declare my first fragment in the main activity: setContentView(R.layout.finallayout); Bundle bundle = new Bundle(); bundle.putStringArrayList("urllist", URLlist); // set Fragmentclass Arguments MainFragment

问题 I am making app, which supports different device orientations. Navigation is carried out by Android Jetpack's Navigation. App main screen for landscape orientation is present below. It is list wrapper fragment (it is NavHostFragment , it is added to activity's layout in fragment tag), wrapper includes list fragment ( fragment ) and details fragment ( FrameLayout ). Portrait orientation is similar (wrapper and list in it, details is accessible throw navigation). My problem is after I change

问题 I want to have completely different menu options in different fragment .I followed this post.But my fragment menu is adding with the activity menu.But i don't want to have activity menus in some of my fragments. In SlidingDrawerActivity : @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return true; } In my fragment: public Friends_Status_Comment_Fragment(){ setHasOptionsMenu(true); } @Override public void onCreateOptionsMenu(Menu