data binding - Android dataBinding - How to get resource id of a View in xml -


in android studio data binding works , set fine. have boolean defined this:

<resources>     <bool name="showads">false</bool> </resources>

and in layout.xml file referenced boolean (which works fine) want assign id based on boolean. let me show trying accomplish:

i have button in relativelayout tag , depending on boolean reposition button. have this:

<button    android:id="@+id/startbutton"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:textsize="64dip"    ****************    android:layout_below="@{@bool/showads ? @+id/adone : @+id/title_main}"    ****************    android:layout_centerhorizontal="true"    android:textcolor="#0080ff"    android:text="@string/start_btn_title" />

see want to do? want layout button below layout called adone if showads boolean true, otherwise place below layout called title_main. whats syntax have here not compiling. compile error:

expression expected after second @ sign

the above same problem in how dimensions dimens.xml

none of layoutparams attributes have built-in support. answered in linked article, data binding of layoutparams thought easy abuse left out of built-in bindingadapters. not abusing it, should add own. 

@bindingadapter("android:layout_below") public static void setlayoutbelow(view view, int oldtargetid, int newtargetid) {     relativelayout.layoutparams layoutparams = (relativelayout.layoutparams)         view.getlayoutparams();     if (oldtargetid != 0) {         // remove previous rule         layoutparams.removerule(relativelayout.below);     }     if (newtargetid != 0) {         // add new rule         layoutparams.addrule(relativelayout.below, newtargetid);     }     view.setlayoutparams(layoutparams); }

as aside, @+id/adone in binding syntax not create id. should create id in view you're binding to.


Comments

Post a Comment

Popular posts from this blog

get url and add instance to a model with prefilled foreign key :django admin -

Image
i have page in each contest shown in row. each row contains contest id , link other model names have foreign key contest. news model: class news(models.model): title = models.charfield(max_length=50, null=true) description = models.textfield() time = models.timefield( default= datetime.datetime.now().time()) contest = models.foreignkey(contest) i want use admin adding , changing these models. want when user clicks on 'news' has foreign key contest id=1, shows list of news value foreign key. use {% instance in instances %} <tr class="{% cycle 'row1' 'row2' %}"> <td>{{ instance.title }}</td> <td>{{ instance.starttime }}</td> <td>{{ instance.timespan }}</td> <td>{{ instance.date }}</td> <td><a href="/adm...
Read more

css - Make div keyboard-scrollable in jQuery Mobile? -

from can tell, although jquery-mobile-powered pages can contain divs overflow set scroll or auto, , these divs can scrolled one-screen bar or mouse wheel, cannot scrolled using arrow keys, page-up/page-down, or home/end. instead, official "page" div (with data-role="page") absorbs input. perhaps other divs can't acquire focus, i'm not sure. is there way around this? edit: jsfiddle of simple example: https://jsfiddle.net/qogz0shx/ <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"> </script> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"/> <style> #outer { overflow:scroll; height: 50vh; width: 50vw; } #inner { height: 500vh; width: 500vw; } ...
Read more

android - Keyboard hides my half of edit-text and button below it even in scroll view -

i having trouble keyboard covers edit-text , half of button in scroll view. here's layout , please tell me how should resolve problem. many questions on topic none of them s working me. <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@drawable/bg" android:layout_height="match_parent"> <scrollview android:layout_width="match_parent" android:fillviewport="true" android:layout_height="match_parent"> <relativelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <linearlayout android:layout_width="match_parent" android:layout_height="w...
Read more