pass/app/src/main/res/layout/activity_pass_edit.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/unencrypted_warning"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="@string/password_not_encrypted_wrong_default" />

        <android.support.v7.widget.AppCompatEditText
            android:id="@+id/password_edit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10"
            android:inputType="textMultiLine|textPassword"
            tools:layout_editor_absoluteX="0dp"
            tools:layout_editor_absoluteY="0dp"/>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:gravity="bottom">
            <android.support.v7.widget.AppCompatCheckBox
                android:id="@+id/showPasswordCheckbox"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:checked="false"
                android:text="@string/edit_ShowPassword"/>

            <android.support.v7.widget.AppCompatButton
                android:id="@+id/saveButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/edit_Save" />
        </LinearLayout>
    </LinearLayout>
</android.support.constraint.ConstraintLayout>