android-databinding

问题 I’m implementing a MVVM and data-binding and I’m trying to understand when should I use Observable field over LiveData? I already run through different documentations and discovered that LiveData is lifecycle aware, but in sample codes in Github these two are being used in ViewModel at the same time. So, I’m confused if LiveData is better than Observable field, why not just use LiveData at all? 回答1: Both have their use-cases, for instance: If you want a life-cycle tolerant container for your

问题 I like use data binding and navigation graph. But after update androidx dependencies from androidx.navigation:navigation-fragment:2.0.0 on 2.2.0 application is crashed after press button "Back". Crash always after return from other fragment to previous fragment containing FragmentPagerAdapter. in build.gradle dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'androidx.constraintlayout:constraintlayout:1.1.3' // This is work // implementation 'androidx

问题 I like use data binding and navigation graph. But after update androidx dependencies from androidx.navigation:navigation-fragment:2.0.0 on 2.2.0 application is crashed after press button "Back". Crash always after return from other fragment to previous fragment containing FragmentPagerAdapter. in build.gradle dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'androidx.constraintlayout:constraintlayout:1.1.3' // This is work // implementation 'androidx

问题 My code shuffles colors and indexes for a list of ColorBox objects indefinitely. This is my view: <TextView style="@style/App.WidgetStyle.ColorBox" android:text="@{item.id}" android:theme="@{item.theme}" tools:text="A" tools:theme="@style/App.ColorBox" /> My styles: <style name="App.WidgetStyle.ColorBox" parent="App"> <item name="android:layout_width">@dimen/square_size</item> <item name="android:layout_height">@dimen/square_size</item> <item name="android:background">@drawable/shape_for

问题 I am using from dataBinding in my project,when I have bellow xml it good work : <TextView android:id="@+id/txtDateCreate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{String.format(@string/DateCreate,others.created)}" /> But when I change to bellow get me crash: <TextView android:id="@+id/txtDateCreate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{Html.fromHtml(String.format(@string/DateCreate,others

问题 I have two classes AdminPinActivity.kt and AdminPinActivityPresenter.kt AdminPinActivity.kt: class AdminPinActivity : InjectableAppCompatActivity() { @Inject lateinit var adminPinActivityPresenter: AdminPinActivityPresenter private var input_Pin: String = "" private var input_Confirm_Pin: String = "" companion object { fun createAdminPinActivityIntent(context: Context, profileId: Int, colorRgb: Int): Intent { val intent = Intent(context, AdminPinActivity::class.java) intent.addFlags(Intent

问题 I have xml with android data binding: <?xml version="1.0" encoding="utf-8"?> <layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <data> <variable name="presenter" type="com.myapp.presentation.presenter.CreateUserPresenter"/> </data> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <android.support.design.widget.TextInputLayout android:id="@+id

问题 I wrote a layout xml like below. But the Kotlin compiler says Cannot resolve symbol 'Int' main_activity.xml <?xml version="1.0" encoding="utf-8"?> <layout ...> <data> <import type="androidx.databinding.ObservableArrayMap" /> <variable name="myList" type="ObservableArrayMap<Int,String>" /> </data> <!-- ...... --> </layout> Is it possible to use kotlin builtins in android databinding xml? 回答1: Use java Integer instead of kotlin Int . You can not use characters <,> etc in XML. So use HTML

问题 Android Studio 3.1, java 1.8 I try to use data binding: Here settings.xml layout: <layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <data> <variable name="handler" type="com.myproject.SettingsFragment" /> </data> <android.support.constraint.ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent"> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent">

问题 Android Studio 3.1, java 1.8 I try to use data binding: Here settings.xml layout: <layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <data> <variable name="handler" type="com.myproject.SettingsFragment" /> </data> <android.support.constraint.ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent"> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent">