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How do create RecyclerView with moving elements?

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gionna last edited by

How to create RecyclerView with elements that can be pulled off the list and put in another position? Don't copy / box, move. Element is CardView. Is there a library?
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shizuka last edited by

You seem to know; but this is: https://github.com/h6ah4i/android-advancedrecyclerview
Here's an example of work. http://www.youtube.com/watch?feature=player_embedded&v=S7cSwMArjUQ
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Why do I get a -1 when pressing in a recyclerview element?
Software Programming • android kotlin app rec languageyc languagele • • derk

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Note that the adapter's onBindViewHolder() method already has the position. This is where you should make the setOnClickListener():holder.itemView.setOnClickListener { itemClickHandler.invoke(position) }
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Why in the heir, the application method accepts the Context
Software Programming • java android • • nishika

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I've actually responded in the commentary, but since you insist: "I will write more extensively.That's it. utility methodi.e. auxiliary, which helps make the code more compact, easier and more readable. Usually, such methods are put in packages or classes with the title Utils or something. But this is where the author decided to put him in-grade. Applicationwhich is logical, but not in principle.It's a static method, so he doesn't have access to the context. That's the context, and it's a parameter. And this context of the class itself doesn't need it, as you write, only this method.
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Fill a list from another activity
Software Programming • android • • guilherme

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First I would recommend the use of http://square.github.io/retrofit/ which does the work of conducting queries to endpoint with a simpler syntax and helps you to get more information about the server's response, for example: 404, 500, among others. .Responding to your question about how to pass the information from one activity to another we have the option to send these through the extras in the intent.From your Activity: Intent intent = new Intent(busqueda.this,Carrito.class); intent.putExtra("string","hola mundo!"); intent.putExtra("entero",0); intent.putExtra("real",0.5f); intent.putExtra("boolean", true); startActivity(intent); and Receiving it this way in onCreate of the other Activity Cart This way: Intent intent = getIntent(); String string = intent.getStringExtra("string"); //el segundo parametro es un default para la variable //en caso que no encuentre la variable int entero = intent.getIntExtra("entero",0); float real = intent.getFloatExtra("real",0.0f); boolean bool = intent.getBooleanExtra("bool", false); In the case of sending non-primitive data we have the option of making these Parcelable or Serializable.The 2 perform the same function only that the plot you have to write a little more, I leave you an example http://androcode.es/2012/12/trabajando-con-parcelables/ and Serializable is easier to implement but a little more inefficient than Parcelable, example of Serializable http://www.coderzheaven.com/2012/07/25/serialization-android-simple-example/ .I hope I helped you.
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How do you make a button that creates a new element?
Software Programming • java android • • magpie

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Your scrollView isn't the LinearLayout, it's ConstraintLayout. There's no sign of the width and height of EditTexto's. Accordingly, we will have to fix xml:<ScrollView android:id="@+id/scrollView2" android:layout_width="match_parent" android:layout_height="0dp" android:layout_marginTop="8dp" android:layout_marginBottom="8dp" android:background="@drawable/for_scroll" app:layout_constraintBottom_toTopOf="@+id/btnCount" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.0" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/tvKof"> <LinearLayout android:id="@+id/linearLayout" android:layout_width="match_parent" android:layout_height="match_parent"> <EditText android:id="@+id/name1" style="@style/ETon2Layout" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_marginStart="15dp" android:layout_marginTop="16dp" android:background="@drawable/for_input" android:ems="10" android:hint="название" android:inputType="text" android:maxLength="30"/> <EditText android:id="@+id/name2" style="@style/ETon2Layout" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_marginStart="15dp" android:layout_marginTop="10dp" android:background="@drawable/for_input" android:ems="10" android:hint="название" android:inputType="text" android:maxLength="30"/> </LinearLayout> </ScrollView> java:yourBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { EditText newEditText = new EditText(this); newEditText.setTextAppearance(R.style.ETon2Layout); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); layoutParams.setMarginStart(convertDpToPixels(15)); layoutParams.setMargins(convertDpToPixels(15), convertDpToPixels(16), 0, 0); newEditText.setBackground(R.drawable.for_input); newEditText.setEms(10); newEditText.setHint("название"); newEditText.setMaxLines(30); newEditText.setTag("name" + linearLayout.getChildCount()); linearLayout.addView(newEditText); } public int convertDpToPixels(float dp) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics()); } }); to be replaced this in the context of your annex
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Challenge of one RecyclerView.Adapter in another RecyclerView.Adapter
Software Programming • java android recyclerview recyclerview.adapter • • derk

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Method static belongs to the class, he doesn't know what object to call. notifyItemChanged Therefore, a reference to the object of Class ElementsRV should either be transmitted:ElementsRV.deleteItem(context, elementsRV); elementsRV is a copy of Class ElementsRVpublic static void deleteItem(Context context, ElementsRV erv){ SharedPreferences sp = context.getSharedPreferences("spCategories", Context.MODE_PRIVATE); for (int i = 0; i < recipesModelList.size(); i++){ if (!sp.contains(recipesModelList.get(i).getCategoryName())){ recipesModelList.get(i).setCategoryName(""); recipesModelList.get(i).setCategoryBtnColor(0); recipesModelList.get(i).setCategoryTextColor(0); erv.notifyItemChanged(i); // Non-static method 'notifyItemChanged(int)' cannot be referenced from a static context } } } Either it's not static, it's gonna work right.elementsRV.deleteItem(context);
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JavaScript addEventListain to future elements created dynamically
Software Programming • javascript html dom • • zymir

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You could put a class as a flag, so you wouldn't re-assign the event.var dataLabels = document.querySelectorAll('*[data-label]:not(.evento-asignado)'); dataLabels.forEach((item,index) => { item.className += " evento-asignado"; item.addEventListener("mouseenter",function() { console.log(this.getAttribute("data-label")); }); });<button data-label="Desripción botón 1">Button1</button> <button data-label="Descripción botón 2"> Button2</button>
Javascript canvas, moving angle of an element
Software Programming • javascript canvas • • morde

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The angle with which it moves is the result of how many pixels it moves in x and and for every iteration. Note: dy is "outside" as in programming it is common that the 0 stays at the top of the screen, while each pixel counts down.In the code you share dx represents the change of pixels in horizontal by iteration, and dy represents the vertical pixel change.A form of associating with trigonometry is taking into account the following formula, which expresses a relationship between the angle and the change of pixels in x and and: In your case if it is 3-3 pixels in x-y, then the initial angle is 45°.
Error when creating PHP connection
Software Programming • android connect app • • emmalee

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The method to define the type of shipping is setRequestMethod and not getRequestMethod as it was used, which should be exchanged right at the top of the connection to stay as follows:try{ url = new URL (urlusuario); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); //agora com set Attention content-length is also not well due to a writing error:connection.setRequestProperty( "content-lenght", ... It should then stay:connection.setRequestProperty( "content-length", "" + Integer.toString( parametrousuario.getBytes().length );
How is it right to transfer ArrayList to another activity
Software Programming • android kotlin android parcelable • • morde

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In Android, all data between different activities are transmitted in a special container https://developer.android.com/reference/android/os/Parcel ♪ Only defined data types can be added to this container. One of these types is... Parcelable♪You're using. putParcelableArrayListExtraThat's right, it's just necessary that TestList Implemented the interface https://developer.android.com/reference/android/os/Parcelable ♪ In order not to describe the implementation of Parcelable by hand, a flame can be used https://developer.android.com/kotlin/parcelize ♪I'll give an example of how to do by kotlin-parcelize:We celebrate the annotations. @Parcelize All classes to be transferred and implemented Parcelable:@Parcelize class MyExtra(...) : Parcelable Attivitis A, lay the object myExtra Intent and launch of the BAA:val myExtra: MyExtra = ... startActivity( Intent(this, ActivityБ::class.java) .putExtra("com.example.my_extra", myExtra) ) In Assimilitis B, we're pulling this object from the intent:val myExtra = intent.getParcelableExtra<MyExtra>("com.example.my_extra")
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ListView with the possibility of moving elements
Software Programming • java android • • Duquan

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Library https://github.com/bauerca/drag-sort-listview It's for your function. She's quite popular and tested.She's got a completely castomized interface. Looks like a list.
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How do you know about attempts or use of NFC protocol on Androids?
Software Programming • android android sdk safety nfc • • obi

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When applied NFC The mark, the android's starting. Intent Filter ♪ ACTION_NDEF_DISCOVERED♪ ACTION_TECH_DISCOVERED and ACTION_TAG_DISCOVERED♪ They are sent throughout the DS and each programme or service that can can process them will capture and process them (in the background mode).It is therefore possible to establish an annex or/or service that will capture the Intent data and show that it has been intercepted. Therefore, if your annex caught this Intent, then other applications on this phone were also intercepted by NFCs.It's the only thing that's gonna have to be sweating, and we're gonna have to figure it out. Intent Filterwith the background work of the application or the service. You can read this for starters. https://developer.android.com/guide/topics/connectivity/nfc/nfc.html )
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Creating dynamically array elements
Software Programming • php • • courtlanda

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Despite the downvotes, I made a point of reopening this post and showing a solution.On the page a.php creates the file optionsArray.php$servidor = "localhost"; $usuario = "Usuario"; $senha = "SENHA"; $dbname = "NOME_DB"; $mysqli = mysqli_connect($servidor, $usuario, $senha, $dbname); $query = "SELECT id_regional, regional FROM t_regional ORDER BY regional"; $resultado=$mysqli->query($query); $filename="optionsArray.php"; if (!file_exists($filename)) { $linhas=""; while ($row = mysqli_fetch_assoc($resultado)){ $linhas .= "\n".'$options["'.$row['id_regional'].'"] = "'.$row['regional'].'";'; } $linhas ="<?php \n".$linhas."\n ?>"; file_put_contents($filename, $linhas); } On the page b.php include the file optionsArray.php created in the page a.php$options = array(); include_once("optionsArray.php"); $label = $options[$_POST['cbx_regional']]; echo $label; The two pages above could merge into one without problems.Question: Why would you want to create this file dynamically?Answer: Anderson Carlos Woss' answer is certainly the most obvious.But I don’t know if I understood the comment in the accepted reply of this post https://stackoverflow.com/questions/18411463/target-html-option-label-instead-of-its-value-in-php that says (Google translation) "Okay, that works in a way. MAS, about if there are 100 options on the page? I have to add $ options ["music / three"] = "somename"; $ Options ["music / four"] = "somename"; For each? Or is there another way to do that? ".That's the reason for the question and that's the reason for my answer. Operating summary: The usefulness of this only the American could explain OBS: It's not clear where that information would come from, but I think it's from a database.
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Sampling
Software Programming • android android studio database sampling • • Pearlaqua

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If I've understood the problem correctly, you don't know how to make a request for the bud. The following is a small example (written in the notebook so there may be errors). As an argument getFilteredProducts You must hand over the formed copy. Product You're the one who wants to choose from the bud.private static final String TABLE_NAME = "products"; private static final String BRAND_COLUMN = "brand"; private static final String PRICE_COLUMN = "price"; ... public List<Product> getFilteredProducts(Product findProduct){ List<Product> products = new ArrayList<>(); DBHelper dbHelper = new DBHelper(this); SQLiteDatabase database = dbHelper.getReadableDatabase(); String query = "SELECT * FROM " + TABLE_NAME + " WHERE (" + BRAND_COLUMN + " = " + findProduct.getBrand() + " AND " + PRICE_COLUMN + " = " + findProduct.getPrice() + " AND " + ... + " = " + findProduct.getSomeParam() + ");"; Cursor cursor = database.rawQuery(query, null); try { cursor.moveToFirst(); while (!cursor.isAfterLast()){ Product product = new Product(); product.setBrand(cursor.getString(cursor.getColumnIndex(BRAND_COLUMN))); product.setPrice(cursor.getInt(cursor.getColumnIndex(PRICE_COLUMN))); ... cursor.moveToNext(); } }finally { cursor.close(); } return products; } I did an example of everything with two pillars, I hope you understand the meaning. More information on the logical operators in SQLite can you find https://www.techonthenet.com/sqlite/and_or.php ♪
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The problem with the Operator is changed when the text is recognized.
Software Programming • java android android studio index switch • • Kadir

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The switch is likely to use equals to compare the line, in your case you need to check which line comes.Voting recognition may be returned by letter lines or the first letter will be capitalized. ♪ ♪Try not to use it. switch a if else and to compare lines equalsIgnoreCase()if (text.equalsIgnoreCase("ПРИВЕТ.")){ text = "Приветствую"; }else{ text = "Я вас не понимаю"; } And there's another question, the line you're getting your voice recognition back contains at the end or not?
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Appendix of element to RecyclerView
Software Programming • android • • Jolied

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Try adding a field favorite (true/false) in the Mblitz and the facility. If the user made the object in love, you're changing this object. favorite and asynchronously send a request with a change to the OBD. A more appropriate option would be to send requests to the base after the user leaves the screen. Let's say the user deleted several elements, added one and two. favorite♪ All of these actions can be carried out on individual requests or on one occasion destroyed screen: You're making a local field at all sites, for example, isModified♪ If the object is altered, you shall set a flag. Privacy destroy screens, you draw up a list of modified objects and you write it in the OBD system. Such an organization would certainly be better because the annex would work faster and less.

How do create RecyclerView with moving elements?

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