приклад верстки актівіті в android-додатку

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true">

    <com.google.android.gms.ads.AdView
        android:id="@+id/ad_view"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentTop="true"
        ads:adSize="BANNER"
        ads:adUnitId="ca-app-pub-7611995396546769/3607520537" />

    <ImageView
        android:layout_width="210dp"
        android:layout_height="210dp"
        android:layout_below="@+id/ad_view"
        android:onClick="onClick"
        android:layout_centerHorizontal="true"
        android:src="@drawable/vzhuh" />

    <LinearLayout
        android:id="@+id/textAndVoice"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:focusable="true"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/text"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:layout_marginBottom="4dp"
            android:layout_marginLeft="@dimen/my_default"
            android:layout_weight="11"

            android:hint="@string/pow"
            android:inputType="textNoSuggestions"
            android:maxLength="60"

            android:textColor="@color/colorBrownDark"
            android:textColorHint="@color/colorGrayDark"
            android:textSize="40sp">

        </EditText>

        <android.support.design.widget.FloatingActionButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/my_default"

            android:onClick="mic"
            android:src="@drawable/ic_mic_black_24dp"
            app:backgroundTint="@color/colorBrown" />
    </LinearLayout>

</RelativeLayout>