<androidx.cardview.widget.CardView
    android:id="@+id/constraintLayout2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginTop="50dp"
    android:elevation="@dimen/dp_6"
    app:cardCornerRadius="@dimen/dp_33"
    app:layout_constraintEnd_toStartOf="@+id/guideline4"
    app:layout_constraintStart_toStartOf="@+id/guideline3"
    app:layout_constraintTop_toBottomOf="@+id/constraintLayout">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_65">

        <ImageView
            android:id="@+id/imageView5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="43dp"
            android:background="@drawable/login_pwd_icon"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <EditText
            android:id="@+id/pwdEt"
            android:layout_width="0dp"
            android:layout_height="@dimen/dp_65"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="16dp"
            android:background="@null"
            android:hint="@string/input_pwd_text"
            android:inputType="textPassword"
            android:lines="1"
            android:selectAllOnFocus="true"
            android:text="@={vm.MUserPwd}"
            android:textSize="21sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/eyeIv"
            app:layout_constraintStart_toEndOf="@+id/imageView5"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/eyeIv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="28dp"
            android:background="@drawable/login_pwd_unvisibile"
            android:onClick="@{() -> vm.pwdState(pwdEt.text.toString())}"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

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

例如给id是eyeIv 的设置padding = ”30dp“ 效果就是背景图变大 ！ 我想要的是点击范围变大，不是图片变大！