Study2

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/rl_background"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimary">

    <ImageView
        android:id="@+id/iv_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="16dp"
        app:srcCompat="@drawable/ic_arrow_back_black_24dp" />

    <TextView
        android:id="@+id/tv_name_topic"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:padding="16dp"
        android:text="Topic name"
        android:textColor="@color/textWhite"
        android:textSize="18sp" />

    <androidx.cardview.widget.CardView
        android:id="@+id/cv_word"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_margin="16dp">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/cl_full"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/tv_origin"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginTop="16dp"
                android:text="word"
                android:textColor="@color/colorPrimary"
                android:textSize="18sp"
                android:textStyle="bold"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/tv_pronun"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:text="pronun"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/tv_origin" />

            <TextView
                android:id="@+id/tv_details"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginTop="8dp"
                android:background="#FFC8C8C8"
                android:padding="16dp"
                android:text="Tap to show detail"
                android:textAlignment="center"
                android:visibility="visible"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/tv_pronun" />

            <android.support.constraint.ConstraintLayout
                android:id="@+id/cl_detail_part"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="8dp"
                android:visibility="gone"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/tv_pronun">

                <TextView
                    android:id="@+id/tv_explain"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:layout_marginStart="16dp"
                    android:text="Explain"
                    android:textSize="12sp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                <TextView
                    android:id="@+id/tv_type"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:layout_marginStart="16dp"
                    android:text="Type"
                    android:textColor="@color/textBlack"
                    android:textSize="14sp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/tv_explain" />

                <ImageView
                    android:id="@+id/iv_word"
                    android:layout_width="0dp"
                    android:layout_height="150dp"
                    android:layout_marginEnd="16dp"
                    android:layout_marginStart="16dp"
                    android:layout_marginTop="16dp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/tv_type"
                    app:srcCompat="@color/colorAccent" />

                <TextView
                    android:id="@+id/tv_example"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:layout_marginStart="16dp"
                    android:layout_marginTop="8dp"
                    android:text="Example_eng"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/iv_word" />

                <TextView
                    android:id="@+id/tv_example_trans"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:layout_marginStart="16dp"
                    android:text="Example_trans"
                    android:textSize="12sp"
                    android:textStyle="italic"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/tv_example" />

                <android.support.constraint.Guideline
                    android:id="@+id/guideline"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    app:layout_constraintGuide_percent="0.5" />

                <TextView
                    android:id="@+id/tv_didnt_know"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:background="#FFFFAAAC"
                    android:padding="16dp"
                    android:text="I didn't know this word"
                    android:textAlignment="center"
                    android:textColor="@android:color/holo_red_dark"
                    app:layout_constraintEnd_toStartOf="@+id/guideline"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/tv_example_trans" />

                <TextView
                    android:id="@+id/tv_knew"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:background="#FFBCFFC7"
                    android:padding="16dp"
                    android:text="I knew this word"
                    android:textAlignment="center"
                    android:textColor="@android:color/holo_green_dark"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toEndOf="@+id/tv_didnt_know"
                    app:layout_constraintTop_toBottomOf="@+id/tv_example_trans" />
            </android.support.constraint.ConstraintLayout>

            <TextView
                android:id="@+id/tv_level"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="16dp"
                android:layout_marginTop="16dp"
                android:text="Level"
                android:textAllCaps="true"
                android:textStyle="bold"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>

</RelativeLayout>