Andriod/app/src/main/res/layout/activity_feed_back.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/gray_bg"
    android:orientation="vertical">

    <EditText
        android:id="@+id/et_feed_back"
        android:layout_width="match_parent"
        android:layout_height="202dp"
        android:layout_marginLeft="15dp"
        android:layout_marginTop="10dp"
        android:layout_marginRight="15dp"
        android:background="@drawable/corners_stork_gray_white_5dp"
        android:gravity="top"
        android:hint="@string/hint_please_input_feedback"
        android:lineSpacingExtra="6dp"
        android:maxLength="1000"
        android:paddingLeft="14dp"
        android:paddingTop="10dp"
        android:paddingRight="14dp"
        android:paddingBottom="10dp"
        android:textColor="@color/text_black"
        android:textColorHint="@color/text_black_66"
        android:textSize="@dimen/px36_12sp" />

    <Button
        android:id="@+id/btn_submit"
        android:layout_width="match_parent"
        android:layout_height="42dp"
        android:layout_marginLeft="14dp"
        android:layout_marginTop="29dp"
        android:layout_marginRight="14dp"
        android:background="@drawable/corners_blue_btn_5dp"
        android:enabled="false"
        android:text="@string/submit"
        android:textColor="@color/white"
        android:textSize="@dimen/px48_16sp" />
</LinearLayout>