android-constraintlayout

问题 I am trying to make the following seemingly simple yet tricky layout using ConstraintLayout . Normal UI: With longer title: I have tried following code: <androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp"> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ellipsize="end" android:maxLines="1" android:text="April Ludgate" android

问题 Is it possible to do something like this: Xml: <android.support.constraint.Guideline app:layout_constraintGuide_percent="@{viewModel.guidelinePercent}" /> ViewModel: @Bindable public float getGuidelinePercent() { return condition ? 0.6f : 0.8f; } I'm getting this error: Cannot find the setter for attribute 'app:layout_constraintGuide_percent' with parameter type float on android.support.constraint.Guideline. I've tried with BindingAdaptor but it doesn't change the value: ViewModel:

问题 I have read through https://developer.android.com/reference/androidx/constraintlayout/widget/ConstraintLayout.LayoutParams I have also gone through various code examples, but I am unable to understand when does one need to use LayoutParams and when ConstraintSet. Link above says For building up constraints at run time, using ConstraintSet is recommended. The very fact that I am creating view programmatically means that I am defining constraints on run time. So I don't understand that line. I

问题 I have read through https://developer.android.com/reference/androidx/constraintlayout/widget/ConstraintLayout.LayoutParams I have also gone through various code examples, but I am unable to understand when does one need to use LayoutParams and when ConstraintSet. Link above says For building up constraints at run time, using ConstraintSet is recommended. The very fact that I am creating view programmatically means that I am defining constraints on run time. So I don't understand that line. I

问题 I have read through https://developer.android.com/reference/androidx/constraintlayout/widget/ConstraintLayout.LayoutParams I have also gone through various code examples, but I am unable to understand when does one need to use LayoutParams and when ConstraintSet. Link above says For building up constraints at run time, using ConstraintSet is recommended. The very fact that I am creating view programmatically means that I am defining constraints on run time. So I don't understand that line. I

问题 What is the translation to java code of the following XML instructions used in a layout definition with a constraint layout? app:layout_constraintBottom_toBottomOf="@+id/Button1" app:layout_constraintTop_toTopOf="@+id/Button1" app:layout_constraintLeft_toLeftOf="@+id/Button2" app:layout_constraintRight_toRightOf="Button2" 回答1: Here is an example of adding constraints programatically, ConstraintLayout mConstraintLayout = (ConstraintLayout)fndViewById(R.id.mainConstraint); ConstraintSet set =

问题 Where can I find the source code for the android ConstraintLayout ? I can't find it in the support framework repository and even in Google search. 回答1: Its source code is here: https://android.googlesource.com/platform/frameworks/opt/sherpa/+/studio-3.0/constraintlayout/src/main/java/android/support/constraint/ConstraintLayout.java The Android SDK search extension adds a "View source" button on d.android.com reference, which helped me to get this link 来源： https://stackoverflow.com/questions

问题 I want to be able to scroll through a LinearLayout, where each element is a ConstraintLayout that fits the whole screen. I've tried multiple values for layout_height in each Layout but nothing seems to be working. I could hardcode in a layout_height that fits my screen but that is not ideal. Here's what I currently have: <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools=

问题 I want to create a layout (using constraint layout) like the following: In different languages Button1 may be larger than button2. How can I do this? I've only been able to achieve this using a LinearLayout inside the constraint that contains the two buttons, but I'm trying to use only a layout. Thanks 回答1: I have seen questions akin to this one on Stack Overflow a number of times. These questions never have a satisfactory answer IMO (including ones that I have answered.) The difficulty is

问题 plz help me out in this problem i tried many changes that were suggested in android studio basically the problem occurs in playAgain function it crashes but it shold clear the images im the imageviews main activity package com.example.xo; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.GridLayout; import android.widget.ImageView; import android.widget.TextView; public class MainActivity