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Which life cycle is not an active fragment

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Trenton last edited by

I have one activism and many fragments that go there. So what's the life cycle of the fragment that's put on another fragment?
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simrah last edited by

If it stays in the stack, onPause♪
If not popbackstack) - onDestroy♪
But it's worth pointing out that finding is onPause. Not at all. Guarantees that the DS itself will not kill Fragment.
In such cases, the DS re-establishes Fragment and the data that contained it are extracted from either bundle or ViewModel
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Consume local web service from my android device
Software Programming • java android android studio webservic languagee • • Alberto

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Well, you could use the Apache HTTP libraries to facilitate the work and then use it to make a web request:In this case, you have to send your URL object to the HttpURLConnection object and open the connection and specify the type of method (Get) and collect the answer and already treat it. public String petitionHTTPGET(String page) { String response = ""; URL url; HttpURLConnection connection = null; InputStream inputStream = null; try { url = new URL(page); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); inputStream = connection.getInputStream(); response = getStringFromInputStream(inputStream); } catch (MalformedURLException e) { Log.e("RESTExample", "MalformedURLException"); } catch (ProtocolException e) { Log.e("RESTExample", "ProtocolException"); } catch (IOException e) { Log.e("RESTExample", "IOException"); }finally{ connection.disconnect(); try { inputStream.close(); } catch (IOException e) { Log.e("RESTExample", "IOException"); } } return response; } In this other example you would make a POST request and treat the returned lines, which in the example go in XML. private String httpPostRequest(String httpPost, String xmlToSend) { HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(httpPost); try { List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1); nameValuePairs.add(new BasicNameValuePair("xml", xmlToSend)); post.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = client.execute(post); BufferedReader rd = new BufferedReader(new InputStreamReader( response.getEntity().getContent())); String line = ""; String xml = ""; while ((line = rd.readLine()) != null) { xml += line; } return xml; } catch (IOException e) { Log.e("RESExample", "IOException"); } return ""; }
Is there a way to access the views of the container activity from the Fragment?
Software Programming • java android studio android layout android fragment • • inna

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The way you access is using the context of the Activity that the Fragment contains through getActivity().getActivity().findViewById(R.id.<id Vista>);
How to click a ListView item and open an Activity refer to the item I clicked?
Software Programming • android listview • • Laycee

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There are numerous ways to achieve this goal. I'll suggest an approach that I consider efficient.The ideal would be to implement your own version of ** SimpleCursorAdapter**, register a callback responsible for performing the desired action and pass to this callback some data concerning your registration, preferably an ID.In your callback you run the operation using the received reference, in case you open a new activity. Receive reference in the activity and make a new DB consultation with the reference.1 - Tutorial to implement http://pt.androids.help/q8461 2 - Implement an interface on your adapter to pass info to your callbackpublic interface MyListener { void setOnClickAdapter(final View view, final int myId ); } 3 - Register your listener in the method bindView of your adapter@Override public void bindView(final View view, final Context context, final Cursor cursor) { //.... MyListener listener = (TaskListener)context; listener.setOnClickAdapter( myTextView, id ); 4 - In your activity used as context implement the adapter interface@Override public void setOnClickAdapter( final View view, final int id) { view.setOnClickListener( new View.OnClickListener ) @Override public void onClick(View view) { // Execute sua operação } }
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input abstract parameter in interfaces
Software Programming • java android studio • • Amritpal

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A more elegant solution would be, using Generics:public interface DBM<T extends Object> { ... boolean add(T objeto); boolean delete(T objeto); boolean update(T objeto); List<T> getAll(T objeto); } And to implement it: public class ClienteDBM implements DBM<Cliente> { public boolean add(Cliente objeto){ .... } public boolean delete(Cliente cliente) .... } public boolean update(Cliente cliente) .... } public List<Cliente> getAll(Cliente cliente) .... } }
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Software Programming • android android layout android intent android ac languagetivity • • irl

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Your Activity Books is not inflating the book_data layout. xml (which contains custom_view_analiseDetailed), so when you try to initialize the mAnaliseButton variable with findViewById(), it returns null to this variable (because you did not find the past id as parameter) and with this gives the error you posted, to try to associate the listener (setOnClickListener) into a null object.The other button works (I'm wondering it's mBackButton) because you inflate the appropriate layout before trying to setate the listener to the same.
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Software Programming • android sqlite • • charlenef

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There is a need migration of the OBD system, which can be read in detail. http://startandroid.ru/ru/uroki/vse-uroki-spiskom/79-urok-39-onupgrade-obnovljaem-bd-v-sqlite.html I mean, for example, when the database is updated from version 1 to 2, your violin will be completed, which will carry new lines into table 1. To ignore existing values, a function can be usedmDb.insertWithOnConflict(DATABASE_TABLE, null, initialValues, SQLiteDatabase.CONFLICT_IGNORE); (in addition to the reference example)db.insert("people", null, cv);
What is it and what does LayoutInflater do?
Software Programming • android android layout layout xamarin • • Mystic

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You mean the https://developer.xamarin.com/api/type/Android.Views.LayoutInflater/ , actually inflater is the name of the variable that is usually used to inflate a layout on Android:LayoutInflater inflater = (LayoutInflater)this.GetSystemService(Context.LayoutInflaterService); var layout = inflater.Inflate(Resource.Layout.layout_elemento, layoutImages) as LinearLayout; To make a difference it is necessary to know the definitions: https://developer.xamarin.com/api/type/Android.Views.LayoutInflater/ Create an instance of an XML design file your corresponding objects of view. It's never used directly. In your place, use Context.getSystemService(Class) to recover an instance of https://developer.xamarin.com/api/type/Android.Views.LayoutInflater/ standard that is already connected to the current context and correctly configured for the device on which it is running. https://developer.xamarin.com/api/member/Android.App.Activity.FindViewById/ Find the first descending view with the ID given, the view itself if the ID matches, or void if the ID is not valid (≤0) or if there is no matching view in the hierarchy.With regard to your questions:compare a Layoutinflater with a beach swollen, I understand the metaphor that goes inside the XML as gas and the beach ball would be the view/View variable where the XML is loadedIs this so? I know it may seem simple, but there's something I've got I'd laugh at all this.It is a good comparison, the "sweller" inflates the beach layout: View view = LayoutInflater.Inflate(Resource.Layout.layout_playa, null); but within this view (layout_playa) you can find items like pelota, sombrilla, lentes_sol:<?xml version="1.0" encoding="utf-8" ?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/pelota" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:id="@+id/sombrilla" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:id="@+id/lentes_sol" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </RelativeLayout > To access these elements you search in the view that you previously inflated through your id making use of https://developer.xamarin.com/api/member/Android.App.Activity.FindViewById/ , since these elements are within the view : View view = LayoutInflater.Inflate(Resource.Layout.layout_playa, null); ImageView img_pelota = view.FindViewById<ImageView>(Resource.Id.pelota); TextView tv_sombrilla = view.FindViewById<TextView>(Resource.Id.sombrilla); TextView tv_lentes = view.FindViewById<TextView>(Resource.Id.lentes_sol); It is important that the references of the views you get through https://developer.xamarin.com/api/member/Android.App.Activity.FindViewById/ There must exist, otherwise you would get null values.What advantages can it have? When I can get more to use Layoutinflater to assign to a variable an FindViewById() and pass directly the layout?Actually its use is different, https://developer.xamarin.com/api/type/Android.Views.LayoutInflater/ creates an instance of an XML design file in its corresponding objects of view and this view does not need to exist in the layout your activity but if in the resources while to use https://developer.xamarin.com/api/member/Android.App.Activity.FindViewById/ is used to look for views that are in a previously inflated layout :Another example of https://developer.xamarin.com/api/type/Android.Views.LayoutInflater/ Imagine you have to "inflate" a cell type when your list cell is pair and another type when it is odd:public override View GetView(int position, View convertView, ViewGroup parent) {</p> View view = convertView; if (view == null) // no view to re-use, create new if (position % 2 == 1) { view = LayoutInflater.Inflate(Resource.Layout.layout_par, null); } else { view = LayoutInflater.Inflate(Resource.Layout.layout_impar, null); } } return view ; } as an example of https://developer.xamarin.com/api/member/Android.App.Activity.FindViewById/ , you search within a layout (layout_app) the reference of a view (TextView) through your id (Resource.Id.tv_titulo) and modify some property, in this case you assign a text. public override View GetView(int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) // no view to re-use, create new view = LayoutInflater.Inflate(Resource.Layout.layout_par, null); TextView tv_sombrilla = view.FindViewById<TextView>(Resource.Id.sombrilla); tv_sombrilla.SetText("Aplicación Aritzbn"); } return view ; }
Actionbar response to changes in activity(fragment)
Software Programming • android actionbar • • inna

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Use such a purpose. http://developer.android.com/intl/ru/reference/android/widget/Toolbar.html ♪ Here. https://habrahabr.ru/post/256643/ ♪He's comfortable and flexible in the building. Don't forget to use it. NoActionBar topics.
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How to send an Activity json to a Fragment?
Software Programming • android android fragment android ac languagetivity • • Raziyah00

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It's the best way to do it, because your activity won't need to know the keys your fragment needs and vc makes it stand out with the correct parameters.In the case of your ObjectJson you may need to convert it to String to put in the bundle and recovered fragment of the String pro Object. I advise you already create an object and convert json into it to easily transition through activities and fragments.public static MyFragment newInstance(String param) { MyFragment myFragment = new MyFragment(); Bundle args = new Bundle(); args.putString("someString", param); myFragment.setArguments(args); return myFragment; } You were able to recover the saved objects this way:getArguments().getString("someString", 0);
Exemption of fragment already active
Software Programming • java android • • Bogopo

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If you see the reference code of the method setArguments() (sighs)Ctrl + clickThen we'll see the description that this method should be caused before the fragment is attached to the activism. You've got a call after.You can change your code as follows: HistoryFragment.newInstance() The following code (no NPE should be available in the next step for arguments):setArguments(new Bundle()); And now instead historyFragment.setArguments(bundle); Do it.historyFragment.getArguments().putParcelableArrayList("translations", translates);
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How to pass data from one Pager/Fragment to another Activity?
Software Programming • java android fragment • • shizuka

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Well, the best I've been able to do so far, and that I consider as an answer to my question, was to create a sharedPreferences within the viewPager, thus:public static class PlaceholderFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ private static final String ARG_SECTION_NUMBER = "section_number"; /** Returns a new instance of this fragment for the given section number. */ public static PlaceholderFragment newInstance(int sectionNumber) { PlaceholderFragment fragment = new PlaceholderFragment(); Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return fragment; } public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_beb, container, false); int fragment = getArguments().getInt( ARG_SECTION_NUMBER); lista = (ListView) rootView.findViewById(R.id.listView); switch(fragment) { case 1: lista.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { onSavePosition(position); } }); break; case 2: lista.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { onSavePosition(position); } }); break; } return rootView; } //Método para salvar a posição protected void onSavePosition(int position) { getActivity().getApplicationContext(); // TODO Auto-generated method stub SharedPreferences prefs = getActivity().getSharedPreferences("preferencias_1", Context.MODE_PRIVATE); Editor ed = prefs.edit(); ed.putInt("posicao", position); ed.commit(); } } public void onClick(View v){ switch(v.getId()){ case R.id.proximaActivity: Intent nova = new Intent(getApplicationContext(), nextActivity.class); startActivity(nova); break; } }
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Android FAB with progress indicator
Usability Testing • android material design progress bar floating action button • • gionna

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Let's think about what could be the potential problems if we include an indefinite progress indicator of the action button. Can symbolize the state of the action button is changing Since the loading state comes soon after tapping the button and tied with it, the user may think the state of the action button is changing and would expect a different state for the button after loading disappears. Expecting, users would tap on the button more than once to stop ongoing activity Since the loading state appears once user hits the button, the user may interact with the button again to stop the ongoing activity. A disable state of a button might help ~ but won't recommend since it's your CTA and the user would be wondering why you disabled the button as they interact. Suggestions I am assuming you are loading a page once the user clicks on CTA. More clearer visual cue would be the center/top of the page. Or you can show the loading stage through lazy loading feature. If current page stays intact, till new page loads The material design usually shows an indefinite progress state below the navigation. The design presented here has a constraint here because of the position of the fab button. If you are thinking to keep it along with the navbar itself, the extreme bottom is the place to consider. Reminder ~ Visual cue should be strong Whatever you do, the next action must have some headers. You can explore that area as well. A screenshot of few screens would have been helpful to decide on where to place.
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Like in one Activity, display different Fragment
Software Programming • android android fragment • • gionna

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If you're sure you need this, do the following:(1) On the button click, give the second activity to the button-dependent values.@Override public void onClick(v: View){ Intent intent = new Intent(this, Activity2.class); switch(v.id){ case R.id.button1: intent.putExtra("param", "type1") break case R.id.button2: intent.putExtra("param", "type2") break } startActivity(intent) } (2) In the second activate, you get an intent parameter and you add the necessary fragments to activate.@Override public void onCreate(savedInstanceState: Bundle) { super.onCreate(savedInstanceState); switch(getIntent().getSting("param")){ case "type1": getFragmentManager().beginTransaction().add(Fragment1()).commit(); break; case "type2": getFragmentManager().beginTransaction().add(Fragment1()).add(Fragment2()).commit(); break; } } But there's a suspicion that nothing bad will happen if you do one instead of two activates, and your buttons put in another piece.
Problems with TextView in Android Studio 3.0.1
Software Programming • android android studio kotlin • • irl

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The problem is you're using https://kotlinlang.org/ and no Javain this case you must obtain the reference TextView in this way: val miTexto: TextView = findViewById<TextView>(R.id.textView) as TextView miTexto.text = "He cambiado" Your project was created with support
Fragments, references to fragments
Software Programming • android android sdk • • carriann

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In the first case, you receive a reference to a fragment registered in an activist for which life-cycle methods have already been caused, i.e. loading and displaying the marking. But if you didn't actually add the fragment (or have already deleted) then you will. nullIn the second, you create a copy of the fragment class for which only his designer is called. It has not been added to activate, its life-cycle methods have not been caused by the system and its markings are not downloaded.Conclusion: Access to the marking of the fragment can be obtained only by adding it to the activists and getting it activated.

Which life cycle is not an active fragment

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