Draw Rectangle View with curve bottom In Android

Just play with the oval item values to get the desired output.

curve_toolbar_bg.xml

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <item>        <shape android:shape="rectangle"/>    </item>    <item        android:bottom="0dp"        android:left="-100dp"        android:right="-100dp"        android:top="-80dp">        <shape android:shape="oval">            <solid android:color="@color/colorPrimary" />        </shape>    </item></layer-list>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/container"    android:layout_width="match_parent"    android:layout_height="match_parent">    <android.support.v7.widget.Toolbar        android:id="@+id/toolbar"        android:layout_width="0dp"        android:layout_height="?android:attr/actionBarSize"        android:background="@drawable/curve_toolbar_bg"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent"        app:layout_constraintTop_toTopOf="parent"        app:layout_constraintVertical_bias="0.0">    </android.support.v7.widget.Toolbar></android.support.constraint.ConstraintLayout>

This is what I did to achieve curved status bar on my android application. This created a toolbar that can be over other views so when you scroll views goes under the toolbar.

First I hid the original Toolbar from activity by creating a no title theme and selecting that theme from manifest. Then I created a Titlebar of my own and then by playing with margins and paddings I achieved desired result.

statusbar

sytles.xml:

    <style name="Notitle.Theme" parent="Theme.AppCompat.NoActionBar">    <item name="android:windowNoTitle">true</item></style>

AndroidManifest.xml

<activity        android:name=".MainActivity"        android:theme="@style/AppTheme.NoActionBar"/>

arch.xml:

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android"><item>    <shape android:shape="rectangle"/></item><item    android:bottom="0dp"    android:left="-100dp"    android:right="-100dp"    android:top="-80dp">    <shape android:shape="oval">        <gradient            android:startColor="#2629fb"            android:endColor= "#2699FB"            android:angle="90" />    </shape></item></layer-list>

mainActivity.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:id="@+id/linearLayout"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:background="#27292c"><androidx.appcompat.widget.Toolbar    android:id="@+id/toolbar"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:minHeight="?attr/actionBarSize"    app:layout_constraintEnd_toEndOf="parent"    app:layout_constraintStart_toStartOf="parent"    app:layout_constraintTop_toTopOf="parent"    android:contentInsetLeft="0dp"    android:contentInsetStart="0dp"    app:contentInsetLeft="0dp"    app:contentInsetStart="0dp"    android:contentInsetRight="0dp"    android:contentInsetEnd="0dp"    app:contentInsetRight="0dp"    app:contentInsetEnd="0dp"    android:layout_marginBottom="-50dp"    android:elevation="5dp"    android:background="@drawable/arch">    <TextView        android:id="@+id/headerWidgetTitle"        android:text="Title"        android:gravity="center"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="24sp"        android:paddingTop="10dp"        android:textColor="#FFFFFF"        android:paddingBottom="20dp"/></androidx.appcompat.widget.Toolbar>    <ScrollView        android:layout_width="match_parent"        android:layout_height="match_parent">        <LinearLayout            android:id="@+id/scrollLinearLayout"            android:layout_height="wrap_content"            android:layout_width="match_parent"            android:orientation="vertical"            android:elevation="0dp"            android:paddingTop="50dp"            android:clipToPadding="false">            <!-- Your Views -->              </LinearLayout>    </ScrollView>