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android layout leaving small gaps

So I have a image view and below a relative layout. The desired is to always have the users see the text views and buttons in the nested layout. And the image is a top image ( not a full screen background) but some how there is a small gap and the background of the image is bleed past the image view. I have tried different Image scale types and different layouts completely(frame, all linear,etc..)
http://imgur.com/a/n4aIq
and some code
https://gist.github.com/whatkai/92f66d2322957d86dd3fe28a9a5d03c0
FYI layout-weights left gaps too.

There is too many ways to do it.
Try this solution using LinearLayout (orientation: vertical):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/REFragment"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:background="#color/accidentAssistanceColor">
<ImageView
android:id="#+id/SettingsImage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:contentDescription="#string/app_name"
android:scaleType="fitXY"
android:src="#drawable/ers"
android:layout_weight="1"/>
<LinearLayout
android:background="#color/appStartERSBackground"
android:layout_centerHorizontal="true"
android:id="#+id/onView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/SettingsImage"
android:gravity="bottom|clip_vertical|center"
android:orientation="vertical">
<Button
android:gravity="bottom|end"
android:layout_centerHorizontal="true"
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#android:color/transparent"
android:text="Not Now"
android:textColor="#color/white"/>
<Button
android:id="#+id/button2"
android:layout_centerHorizontal="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/button"
android:text="approve"
android:textColor="#color/white"/>
<TextView
android:gravity="center_horizontal|center_vertical"
android:id="#+id/text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/button2"
android:layout_gravity="center"
android:text="BLdfdsAH"
android:textColor="#color/white"/>
<TextView
android:gravity="center_horizontal|center_vertical"
android:id="#+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="BLAH"
android:textColor="#color/white"
android:textSize="20sp"
android:textStyle="bold"/>
</LinearLayout>
</LinearLayout>
And to answer you about how to scall your image i used android:scaleType fitXY to respect to ratio aspet.
If you desire to understand how every scallType works, see the following link:
https://robots.thoughtbot.com/android-imageview-scaletype-a-visual-guide

set view tag between your image and layout.
like this.
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#000000" />

Flexible Horizontal Layout with `layout_weight` and `maxWidth`

I have a TextView and a square ImageView that I would like to show in a horizontal linear layout. Each should take half of the parent view's width and the height should fit the content (i.e. the image). The text should be centered vertically.
Additional constraint is that the image should not grow beyond a given maxWidth (= maxHeight), and excess width should be made available to the TextView. Obviously, this conflicts with the 50/50 rule above. Is there a way to prioritize the constraints, i.e. allow the image to take half of the space unless it exceeds a given size?
These are layouts I tried:
The first one nicely stretches the left side to the available space. But the image takes more than half of the width as its layout_weight is not specified (as in image below).
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Some text."/>
</LinearLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="200dp"
android:adjustViewBounds="true"
android:src="#drawable/image" />
</LinearLayout>
When I add layout_weight to the ImageView it always takes half of the width and ignore the maxWidth (see image below).
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:maxWidth="200dp"
android:adjustViewBounds="true"
android:src="#drawable/image" />
Enclosing the ImageView in another LinearLayout enables the maxWidth again, but the enclosing LinearLayout still takes half of the available space (see image below).
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="right">
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:maxWidth="200dp"
android:adjustViewBounds="true"
android:src="#drawable/image" />
</LinearLayout>
Another option I have found for similar scenarios is to use a RelativeLayout with an invisible view as a center divider, but that locks the division to 50/50 (or wherever the divider is placed).

Okay, gonna go on ahead and post the xml I created, it's pretty much simple, it does most of your conditions.. One thing I'm having trouble with is the part where each view takes half of the parent view's width. Hope this still helps you in some way.
sample_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp"
android:background="#android:color/darker_gray">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/img_sample"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginRight="2dp"
android:layout_toLeftOf="#id/img_sample"
android:background="#color/colorPrimary"
android:gravity="center_vertical"
android:text="Some text." />
<ImageView
android:id="#id/img_sample"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginLeft="2dp"
android:adjustViewBounds="true"
android:maxWidth="200dp"
android:src="#drawable/sample_img" />
</RelativeLayout>
Here is a sample screenshot:
If ever you figure out how to the the half of each thing, kindly comment it here, It'd be nice to know about it for possible future use. :)
PS: Have you considered doing the half of each thing programatically? Like checking the LayoutParams then dynamically setting weightSum and the layout_weights.
Sample Image retrieved from this link

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_weight="1"
android:adjustViewBounds="true"
android:background="#color/blue"
android:src="#drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_margin="5dp"
android:layout_toStartOf="#id/imageView"
android:background="#color/colorPrimary"
android:padding="10dp"
android:text="Some text. " />
</RelativeLayout>

It won't be a perfect solution in term of performance. But you can achieve it by playing with FrameLayout and ImageView.
Here is the output:
Layout.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/textGray"
android:orientation="vertical">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/skyBlue">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#android:color/white">
<ImageView
android:id="#+id/imageView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="200dp"
android:src="#drawable/ic_settings"
android:visibility="invisible" />
<TextView
android:id="#+id/TextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:text="!" />
</FrameLayout>
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:maxWidth="200dp"
android:src="#drawable/ic_settings" />
</LinearLayout>
</FrameLayout>
</LinearLayout>
In order to achieve desire behaviour, You would have to set same images to both imagesviews in this layout. one of them is invisble, It is just helping to make parent with same width and heights which would lead us to create TextView with same dimensions.
Note: If you want to change textView alignment, you can do it with layout_gravity or gravity.

Button taking too much space

I still dont really get it how many space layouts take.
I have the following xml.
The inner LinearLayout's for the bottom space height is set to wrap_content, so it should take the height of the maximum height in there. Which is 52dp. And there is the ImageButton which is set to wrap_content, so the button should be centered vertically on the right side, since its an 24dp image (in xhdpi it has 32x32 pixels). So why is it stretched over the full height like displayed here?:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="2dp">
<de.ph1b.audiobook.utils.SquareImageView
android:id="#+id/cover"
android:scaleType="fitXY"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:layout_gravity="bottom">
<TextView
android:id="#+id/title"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="52dp"
android:paddingLeft="16dp"
android:maxLines="2"
android:ellipsize="end"
android:paddingRight="16dp"
android:gravity="center_vertical"
android:textSize="16sp" />
<ImageButton
android:id="#+id/editBook"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="?android:attr/borderlessButtonStyle"
android:layout_gravity="center_vertical"
android:src="#drawable/ic_more_vert_grey600_24dp" />
</LinearLayout>
</LinearLayout>

either #drawable/ic_more_vert_grey600_24dp is larger than you think or borderlessButtonStyle has a larger background.
Please check the size. I have replicated the behavior and the ImageButton is set to wrap_content and is centered.

change your image button code
<ImageButton
android:id="#+id/editBook"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="?android:attr/borderlessButtonStyle"
android:scaleType="fitXY"
android:gravity="center_vertical"
android:src="#drawable/ic_more_vert_grey600_24dp" />

Make imageview resize to fit its container

I use a relative layout to display a row in a listlayout. What I am showing is an imageview to the left and two textviews to the right. Both the textviews will only have a single line each.
I need to have the image such that it should be automatically resize so its height becomes equal to the height of the text combined. That way, the image height will fit the combined height of both text in all screens. Is this possible? layout is as below -
<ImageView
android:id="#+id/note_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="6dip"
android:src="#drawable/note_icon" />
<TextView android:id="#+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/note_img"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:includeFontPadding="true"
android:singleLine="true"
style="#android:style/TextAppearance.Medium" />
<TextView android:id="#+id/text2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/note_img"
android:layout_alignParentBottom="true"
android:layout_below="#id/text1"
android:singleLine="true"
style="#android:style/TextAppearance.Small" />
As of now,note_img has a size of 96x96 and the image is shown in full size making the image area considerably large and the two text having huge gap between them.
Really appreciate any help.
Thanks,
Arun

Don't use fill_parent, it's depreceated. Untested, let me know if it works:
<?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="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="#+id/note_img"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginRight="6dip"
android:src="#drawable/note_icon" />
<LinearLayout
android:id="#+id/vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/text1"
style="#android:style/TextAppearance.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:includeFontPadding="true"
android:singleLine="true" />
<TextView
android:id="#+id/text2"
style="#android:style/TextAppearance.Small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true" />
</LinearLayout>

After set the Text in TextView set the TextView's height to ImageView like
imageview.getLayoutParams().height = textViewheight;

Scaling ImageView on bottom of Layout

I try to make a Layout with two TextViews on top and an ImageView on the bottom of the Layout. But I have problems with the scalingtyp of the ImageView. The Image should always resize propotional but be always on the center buttom. Here is a picture with my problem:
I hope you unterstand my problem.
Here is my code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/transparent"
android:orientation="vertical" >
<TextView
android:id="#+id/textViewGameOver1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="top|center_horizontal"
android:gravity="center"
android:text="TextView1"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textViewGameOver2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textViewGameOver1"
android:layout_centerHorizontal="true"
android:layout_gravity="top|center_horizontal"
android:gravity="center"
android:text="TextView2"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ImageView
android:id="#+id/imageViewGameOver"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:layout_below="#+id/textViewGameOver2"
android:layout_centerHorizontal="true"
android:layout_gravity="bottom|center_horizontal"
android:scaleType="fitEnd"
android:src="#drawable/sheldon_win" />
</RelativeLayout>
Have anybody a idea to solve this problem?
Best regards!

You should be using a RelativeLayout instead of a LinearLayout. This will let you position the image where you want it and then you can set the size of the ImageView to be whatever size you want.
<ImageView
android:id="#+id/imageViewGameOver"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:src="#drawable/sheldon_win" />
This should put the image in the lower-right corner and the image should be whatever size the image file is. If you want to change that you can set the width and height to some size in dp's.