Develop Reference

Android notification custom layout XML imageview not showing

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="96dp"
android:gravity="center"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:orientation="vertical"
android:paddingStart="24dp"
android:paddingBottom="8dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:id="#+id/pushIcon"
android:layout_width="16dp"
android:layout_height="16dp"
app:srcCompat="#drawable/push_icon" />
<TextView
android:id="#+id/textView23"
style="#style/TextAppearance.Compat.Notification.Info.Media"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="6dp"
android:text="YOLOL"
android:textColor="#color/browser_actions_title_color" />
</LinearLayout>
<TextView
android:id="#+id/text_view_collapsed_1"
style="#style/TextAppearance.Compat.Notification.Title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:text="New Message!"
android:textColor="#color/colorPrimary" />
<TextView
android:id="#+id/text_view_collapsed_2"
style="#style/TextAppearance.Compat.Notification.Info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Expand to show!" />
</LinearLayout>
<ImageView
android:id="#+id/notifPreviewImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
app:srcCompat="#drawable/bb" />
</LinearLayout>
The pushIcon ImageView takes the place but is invisible, any idea why?

A quick tip that always helps in the debug process - add a background color to the view in question (also helps to set a specific Width and Height as well for testing) - it will enable you to see if the view is being rendered at all or not. If you see the background color, then the view is being rendered properly, but the image is not loading correctly. Without knowing this, it could be any combination of those issues.
With that aside, if you are dynamically changing the icon at runtime, I would look at your code there. If this is a static image then I would check that your resource file is a Vector drawable as that is only allowed when using app:srcCompat="#drawable/push_icon"
If your file is a non-vector drawable, then use android:src="#drawable/push_icon"
Here's a discussion that elaborates on this in more detail.

Android Studio Text not conforming to layout_margin when I run App on Emulator

I am trying to resolve a Layout Margin issue, where after I run the app on the emulator the Status Text doesn't appear where I intend it to be.
Attached is the full layout code. How can I improve the code to mitigate this issue in the future?
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
tools:context=".SettingsActivity">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/settings_profile_image"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:src="#drawable/default_profile" />
<TextView
android:id="#+id/settings_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="244dp"
android:text="#string/user_name"
android:textColor="#android:color/background_light"
android:textSize="24sp"
android:textStyle="bold" />
<TextView
android:id="#+id/settings_user_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:layout_marginBottom="260dp"
android:text="#string/user_profile_status"
android:textColor="#android:color/background_light"
android:textSize="18sp" />
</RelativeLayout>
What am I missing?

In the 1st place, you may want to try the constraint layout introduced by android as part of android material design which is aimed at avoiding all the overhead of nesting views. In constraint layout views can be dragged and drooped and they can be assigned margins in the multiples of 8. It is highly suggested to use constraint layouts as opposed to the old nesting of layouts.

if you want the status below user name, just use
android:layout_below="#+id/settings_username"
In your current layout, marginTop is useless, vertical position is decided by
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="260dp"
It is better to use ContraintLayout, which will remove all unused attributes (e.g, if margin is useless, margin attribute is automatically removed).

Try this You just have to remove android:layout_marginBottom="260dp" and android:layout_alignParentBottom="true" and Add android:layout_below="#+id/settings_username" in settings_user_status
<RelativeLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
tools:context=".SettingsActivity">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/settings_profile_image"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:src="#drawable/default_profile" />
<TextView
android:id="#+id/settings_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="244dp"
android:text="#string/user_name"
android:textColor="#android:color/background_light"
android:textSize="24sp"
android:textStyle="bold" />
<TextView
android:id="#+id/settings_user_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:layout_below="#+id/settings_username"
android:text="#string/user_profile_status"
android:textColor="#android:color/background_light"
android:textSize="18sp" />
</RelativeLayout>

layout_centerVertical in Nested Relative Layout causing incorrect positioning of textviews on Android P

<?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">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="#dimen/height"
android:background="#color/orange7">
<TextView
android:padding="#dimen/padding_5dp"
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="#string/title" />
<TextView
android:padding="#dimen/padding_5dp"
android:id="#+id/subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/title"
android:text="#string/subtitle" />
</RelativeLayout>
<TextView
android:layout_below="#id/header"
android:padding="#dimen/padding_5dp"
android:id="#+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/description" />
</RelativeLayout>
I have a layout file with nested relative layouts. On android P devices only, the textviews in inner relative layout are incorrectly placed.
This layout file is used for an activity with Theme.AppCompat.Dialog as a theme.
On Other android devices(non Android P devices), its getting arranged properly.
What must be the reason for this mis-arrangement on android P? Changing outer layout to Linear layout solves issue. Why is it so? Thanks in advance.

You can use ConstraintLayout instead of the RelativeLayout as the container for the TextViews' to achieve the effect you desire across all API versions.
Note the usage of ConstraintLayout as the container of text views, and the usage of attributes like app:layout_constraintTop_toBottomOf="#id/<your_id>".
To know more about constraint layout, please refer Build a Responsive UI with ConstraintLayout (Google Documentation)
<?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.support.constraint.ConstraintLayout
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="#dimen/height"
android:background="#color/orange7">
<TextView
android:padding="#dimen/padding_5dp"
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="#id/subtitle"
android:text="#string/title" />
<TextView
android:padding="#dimen/padding_5dp"
android:id="#+id/subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/title"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#id/title"
android:text="#string/subtitle" />
</android.support.constraint.ConstraintLayout>
<TextView
android:layout_below="#id/header"
android:padding="#dimen/padding_5dp"
android:id="#+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/description" />
</RelativeLayout>

9Patch content area error

It seems my content area doesn't match what the 9patch file says it should be
Heres my 9patch file.
and here is an image of how it looks with an item in it, but the text is getting cut off prematurely, it should be "Varenr." I don't understand why there is such a big white space instead of text ??
and here is the xml layout of the spinner:
<Spinner
android:id="#+id/sortSpinner"
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="35dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/spinner_background"
android:drawSelectorOnTop="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:prompt="#string/sort" />
And of the spinner item
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
style="?android:attr/spinnerItemStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ellipsize="none"
android:gravity="center"
android:singleLine="true" />
Thanks in advance for help.
And for closure, the 9patch in question:
Edit:
The whole line where the spinner is located:
<LinearLayout
android:id="#+id/headerLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:background="#color/transparent"
android:orientation="horizontal"
android:weightSum="11">
<LinearLayout
android:layout_width="0dp"
android:layout_weight="3"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/sortAmountLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:singleLine="false"
android:textColor="#color/solid_red"
android:textSize="15dp" />
<TextView
android:id="#+id/sortLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dip"
android:text="Produkter"
android:singleLine="true"
android:textColor="#color/solid_red"
android:textSize="15dp" />
</LinearLayout>
<Button
android:id="#+id/filterBtn"
android:layout_width="0dp"
android:layout_height="35dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="15dp"
android:layout_marginTop="10dp"
android:layout_weight="4"
android:background="#drawable/button_background_red"
android:clickable="true"
android:singleLine="true"
android:onClick="setFilterList"
android:text="Filtrér"
android:textColor="#color/solid_white"
android:textSize="15dp"
android:textStyle="bold" />
<Spinner
android:id="#+id/sortSpinner"
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="35dp"
android:paddingRight="30dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/spinner_background"
android:drawSelectorOnTop="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:prompt="#string/sort" />
</LinearLayout>

Now, this is how I remade it:
Which gives this result:
Make sure the extension is .9.png
[EDIT]
This is the result when applied to a TextView:
The screen is an old ldpi device (240x320 #120 dpi)
This is how I applied it:
<?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="match_parent"
android:background="#drawable/stripes_vert_4"
>
<!-- ... -->
<TextView
android:id="#+id/txtTitle3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_alignParentBottom="true"
android:textColor="#android:color/black"
android:textSize="16sp"
android:textStyle="bold"
android:text="Lorem ipsum dolor sit amet"
android:background="#drawable/spinner_drawable"
/>
</RelativeLayout>
[EDIT 2]
As per the OP requirement, I switched the TextView to a Spinner:
Result:
By using this code:
<?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="match_parent"
android:background="#drawable/stripes_vert_4"
>
<!-- ... -->
<Spinner
android:id="#+id/spnElements"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:entries="#array/prefs_search_modes"
android:layout_alignParentBottom="true"
android:textColor="#android:color/black"
android:textSize="16sp"
android:textStyle="bold"
android:background="#drawable/spinner_drawable"
/>
</RelativeLayout>
Which implies you have an arrays.xml file in your value folder.
Mine is:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Settings -->
<!-- Word search mode -->
<string-array name="prefs_search_modes">
<item>*b* (Contains "b")</item>
<item>Ab* (Starts with "Ab")</item>
<item>*bc (Ends in "bc")</item>
<item>Abc (Exact match)</item>
</string-array>
</resources>
[EDIT3]
In the last comments the OP is asking for (75% white space + the rest of the width left for the spinner) something like this:
ARE YOU SURE?
The running screen is low res (ldpi).
But next to it, in the graphical editor you can see another device (HTC Desire Bravo) screen which is hdpi.
And it shows the same "issue": 1/4 screen width.
So, the stretchable part of the 9 png background (which contains the text) is squeezed away and only the unsqueezable part (the arrow) stays.
[EDIT4]
After playing with the 9 patch size, I could make part of the text become visible:
So, it seems you have to experiment with smaller sizes until you get an acceptable result.
[EDIT5]
I forgot to add the new spinner 9 patch (resized).
Here it is:
When rescaling, mind the outer border: it has to be completely transparent and the markers must be full black.

text sizes different Android phones

Since I have a Nexus 5, I'm seeing strange stuff regarding text sizes.
An example: I am creating listview items. I put a bigger text at 22sp, a smaller one at 17sp.
On my HTC One X it looks like this:
So I think "ok, that's nice!"
Then I run it on my Nexus 5:
I do not understand why this is happening? Shouldn't the 'sp' part make sure it will look ok
with the default values? I am not talking about the user increasing the font sizes in the settings, I've left everything to defaults.
Eventhough, if I would (don't hit me) use DP here to disable the font size changes for text, it will give the same result (not tested, but I am fairly certain this is the case from other tests).
What is the problem here? Is it the newer Android version, or is it the 1080p screen vs the 720p ?
Should I use different values for different DP using 'values' folder?
here is de layout:
<?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="80dp"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/background"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/image"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:adjustViewBounds="true"
android:scaleType="centerCrop" />
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:layout_weight="2">
<ImageView
android:id="#+id/arrow"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:adjustViewBounds="true" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp"
android:layout_toLeftOf="#id/arrow"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:fontFamily="sans-serif-condensed"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="#+id/address"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:textSize="17sp" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
</LinearLayout>

For instance, the default size for same SP value may vary depending on device, just to match its readability designed for the device.
The problem you got is because you have some elements sized to fixed size, post your XML code you use for the row and we can make a deep analyse.
Edit -- After xml
Well, instead of point you the wrongs, I did prefer to rebuild your layout, take a look:
<?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="10dp"
android:orientation="horizontal" >
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
<TextView
android:id="#+id/name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/image"
android:layout_toLeftOf="#+id/arrow"
android:fontFamily="sans-serif-condensed"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="#+id/address"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/image"
android:layout_toLeftOf="#id/arrow"
android:layout_below="#id/name"
android:textSize="17sp" />
<ImageView
android:id="#id/arrow"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true" />
</RelativeLayout>
Your layout was too complex to a simple row... now the layout will be as tall as the TextViews needs it to be, and it is not a problem, as the user is already used with his text size.

you have to Create two different layout folder and see the result