Take a look at my answer here. ContraintLayout contains a feature – Chains – that makes it possible to implement what you are asking: Chains provide group-like behavior in a single axis (horizontally or vertically). A set of widgets are considered a chain if they a linked together via a bi-directional connection Once a chain … Read more
Actually found a solution. Android Studio does not autocomplete constraintLayout parameters in an include tag but they do have an impact on it as long as you give that include a size. <include layout=”@layout/tmp_2″ android:layout_width=”0dp” android:layout_height=”wrap_content” android:layout_marginTop=”10dp” app:layout_constraintStart_toStartOf=”parent” app:layout_constraintEnd_toEndOf=”parent” app:layout_constraintTop_toBottomOf=”@+id/label_2″ />
I think you should clone the layout after adding your ImageView. ConstraintLayout layout = (ConstraintLayout)findViewById(R.id.mainConstraint); ConstraintSet set = new ConstraintSet(); ImageView view = new ImageView(this); view.setId(View.generateViewId()); // cannot set id after add layout.addView(view,0); set.clone(layout); set.connect(view.getId(), ConstraintSet.TOP, layout.getId(), ConstraintSet.TOP, 60); set.applyTo(layout);“`
Now it’s possible with Barrier class, introduced in constraint-layout v1.1.0. So here’s the solution for your particular case: <?xml version=”1.0″ encoding=”utf-8″?> <android.support.constraint.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:app=”http://schemas.android.com/apk/res-auto” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” tools:context=”com.example.eugene.test10.MainActivity”> <TextView android:id=”@+id/textView1″ android:layout_width=”0dp” android:layout_height=”wrap_content” android:background=”#EEEEEE” android:text=”TEXT_VIEW_1″ app:layout_constraintLeft_toLeftOf=”parent” app:layout_constraintTop_toTopOf=”parent” app:layout_constraintRight_toLeftOf=”@+id/textView2″/> <TextView android:id=”@+id/textView2″ android:layout_width=”0dp” android:layout_height=”wrap_content” android:background=”#DDDDDD” android:text=”TEXT_VIEW_2″ android:visibility=”gone” app:layout_constraintLeft_toRightOf=”@+id/textView1″ app:layout_constraintRight_toRightOf=”parent” app:layout_constraintTop_toTopOf=”parent” /> <android.support.constraint.Barrier android:id=”@+id/labelBarrier” android:layout_width=”wrap_content” android:layout_height=”wrap_content” app:barrierDirection=”bottom” app:constraint_referenced_ids=”textView1,textView2″ /> … Read more
Your understanding for the way app:layout_constraintDimensionRatio works is correct. If you set app:layout_constraintDimensionRatio=”H,3:1″ then it means width will be first computed from other constraints and then height will be adjusted according to the aspect ratio. The only problem with your implementation is that you added app:layout_constraintBottom_toBottomOf=”parent” to the ImageView, so that it caused app:layout_constraintDimensionRatio to … Read more
match_parent is not allowed. But you can actually set width and height to 0dp and set either top and bottom or left and right constraints to “parent”. So for example if you want to have the match_parent constraint on the width of the element, you can do it like this: <TextView android:layout_width=”0dp” android:layout_height=”wrap_content” app:layout_constraintStart_toStartOf=”parent” app:layout_constraintEnd_toEndOf=”parent”/>
It’s possible to set the center aligned view as an anchor for other views. In the example below “@+id/stat_2” centered horizontally in parent and it serves as an anchor for other views in this layout. <android.support.constraint.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:app=”http://schemas.android.com/apk/res-auto” android:layout_width=”match_parent” android:layout_height=”match_parent”> <TextView android:id=”@+id/stat_1″ android:layout_width=”80dp” android:layout_height=”wrap_content” android:layout_marginEnd=”8dp” android:gravity=”center” android:maxLines=”1″ android:text=”10″ android:textColor=”#777″ android:textSize=”22sp” app:layout_constraintTop_toTopOf=”@+id/stat_2″ app:layout_constraintEnd_toStartOf=”@+id/divider_1″ /> <TextView android:id=”@+id/stat_detail_1″ … Read more
Support libraries for ConstraintLayout could not be installed/updated. Just open Preferences > Appearance & Behavior > System Settings > Android and move to SDK Tools tab. Check the following fields and install.
When to use barriers Assume you have two TextView widgets with dynamic heights and you want to place a Button just below the tallest TextView: The ONLY way to implement that directly in the layout is to use a horizontal Barrier. That Barrier allows you to specify a constraint based on the height of those … Read more
Set an elevation on the ProgressBar; 2dp seems to work. android:elevation=”2dp” You could also try setting translationZ as suggested in the accepted answer to a similar question. I also came across this answer as an alternative.