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So I have a scrollable view with multiple textview and edittexts and a button.
PROBLEM:
My problem is that on the bottom of the page, the button is being hidden by the default Android buttons (back,home,etc..)
I DONT want to disable to android buttons. I just want to make the button stay above the android buttons.
I cant find a away to show it above the Android default buttons. How can I solve this?
<ScrollView 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"
tools:context="com.example.tiagosilva.amob_android.ToolSetupFragment"
android:background="#color/AMOB_gray">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_type"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<Spinner
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/spinnerToolType"
android:paddingTop="10dp"
android:gravity="center">
</Spinner>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_height"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_center_height"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolCenterHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/clamp_die_lenght"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_clampDieLenght"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_radius"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolRadius"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tube_diameter"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_tubeDiameter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/pusher_lenght"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_pusherLenght"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/little_roll_radius"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_littleRollRadius"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<Button
android:id="#+id/btn_save_tool"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/round_buttons"
android:text="#string/save"
android:textColor="#color/AMOB_gray"
android:layout_marginTop="10dp"/>
</LinearLayout>

Put the button inside LinearLayout outside the ScrollView and set layout_gravity="bottom"
<ScrollView 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"
tools:context="com.example.tiagosilva.amob_android.ToolSetupFragment"
android:background="#color/AMOB_gray">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_type"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<Spinner
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/spinnerToolType"
android:paddingTop="10dp"
android:gravity="center">
</Spinner>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_height"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_center_height"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolCenterHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/clamp_die_lenght"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_clampDieLenght"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tool_radius"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_toolRadius"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tube_diameter"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_tubeDiameter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/pusher_lenght"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_pusherLenght"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/little_roll_radius"
android:textColor="#color/AMOB_yellow"
android:textSize="25dp"
android:gravity="center"
android:layout_marginTop="10dp"/>
<EditText
android:id="#+id/et_littleRollRadius"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/round"
android:ems="3"
android:inputType="number"
android:padding="10dp"
android:text="0.0"
android:textAlignment="center"/>
</LinearLayout>
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom">
<Button
android:id="#+id/btn_save_tool"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/round_buttons"
android:text="#string/save"
android:textColor="#color/AMOB_gray"
android:layout_marginTop="10dp"/>
</LinearLayout>

You could move the Button wiht id btn_save_tool out of the ScrollView, then use a RelativeLayout as a root ViewGroup like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/AMOB_gray"
tools:context="com.example.tiagosilva.amob_android.ToolSetupFragment">
<Button
android:id="#+id/btn_save_tool"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#drawable/round_buttons"
android:text="#string/save"
android:textColor="#color/AMOB_gray"
android:layout_marginTop="10dp"/>
<ScrollView
android:layout_above="#id/btn_save_tool"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- ... -->
</ScrollView>
</RelativeLayout>