Those icons you can find in the sdk/platforms/data/res/drawable-hdpi... such as ic_delete. How would you go about overlaying one of those icons on a .png, using drawables?
you can place different shapes in one single layer list. In this example below, your custom drawable will be drawn on top of the android drawable ic_custom.png
example:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/layer_delete">
<bitmap android:src="#android:drawable/ic_delete" android:gravity="center" />
</item>
<item android:id="#+id/layer_custom">
<bitmap android:src="#drawable/ic_custom" android:gravity="center" />
</item>
</layer-list>
Related
I have following spinner:
<Spinner
android:id="#+id/safe_network_time_spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:background="#drawable/spinner_selector"
android:entries="#array/schedule_edit_days_repeat"
android:popupBackground="#drawable/custom_dropdown_white_background"
android:spinnerMode="dropdown"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/divider4"
tool:listitem="#layout/custom_dropdown_spinner_button" />
The spinner_selector is:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<bitmap android:gravity="right|center_vertical" android:src="#drawable/down_red_arrow" />
</item>
</selector>
The dropdown list appears like this:
When I select an item of the dropdown list, if it is too long it overlaps the arrov bitmap. how can I avoid this?
Try using a layer-list
bg_spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<!-- This is the actual spinner background -->
<selector >
<!-- Feel free to use your own drawable for these states -->
<item android:state_window_focused="false" android:drawable="#drawable/bg_border_accent_thin"/>
<item android:state_pressed="true" android:drawable="#drawable/bg_border_accent_thin"/>
<item android:state_window_focused="true" android:state_pressed="false" android:drawable="#drawable/bg_border_grey_thin"/>
</selector>
</item>
<!-- This is the spinner drawable, use your custom drawable aswell. android:right does the magin to separate this drawable from the spinner content-->
<item android:drawable="#drawable/ic_ripple_arrow"
android:gravity="center_vertical|right"
android:right="16dp"/>
</layer-list>
Edit 02/02/2020
My apologies for a weekend-long lunch.
If you are using the androidx dependencies (which I suggest you do) here's the code that I use to properly add spacing between the text and the selected item in the spinner.
On your layout.xml
<!-- The line I think you need is the one giving padding to the right -->
<androidx.appcompat.widget.AppCompatSpinner
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:paddingRight="36dp"
android:background="#drawable/bg_spinner"
android:popupBackground="#drawable/bg_spinner_popup"/>
The bg_spinner.xml is the one provided a couple of lines above.
And the popup one doesn't really matter, since it gives some directives on how to paint a background, nothing important but here it is either way...
bg_spinner_popup.xml
<?xml version="1.0" encoding="utf-8" ?>
<shape xmlns:android="http://schemas.android.com/apk/res/android
android:shape="rectangle">
<corners android:radius="3dp"/>
<solid android:color ="#android:color/white"/>
<stroke android:width="5px" android:color="#color/primaryColor"/>
</shape>
I'm working on an Android application where I want to create a windowBackground with a centered element and a layout also with a centered element. I want these elements to be in the exact same position, with the layout overlapping the background. The problem I'm having is that the layout and the background seem to be calculating center differently (see image). Why is this happening, and what can I do to line the elements up?
This is what I see right now. The red box is created by the background and the green box is created by the foreground. Screenshot was created with a Nexus 5X API 26 emulator.
Foreground layout:
<?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">
<View
android:background="#color/foreground_box"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_centerInParent="true" />
</RelativeLayout>
Background Drawable (applied via android:windowBackground in my theme)
<?xml version="1.0" encoding="UTF-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/background" />
<item android:gravity="center">
<shape
android:gravity="center"
android:shape="rectangle">
<solid android:color="#color/background_box" />
<size android:width="10dp"
android:height="10dp" />
</shape>
</item>
</layer-list>
For clarity, my colors file is
<?xml version="1.0" encoding="utf-8"?>
<resources>
...
<color name="background">#ffffff</color>
<color name="background_box">#AAFF0000</color>
<color name="foreground_box">#AA00FF00</color>
</resources>
Full source for this sample project is available at https://github.com/HofmaDresu/AndroidCenteredTest
The reason windowBackground includes both the heights 1) statusBar and 2) actionBar
Modify below line in your background.xml
<item android:gravity="center" android:top="80dp"> // 56 actionBarSize + 24 statusBarHeight
You may need to manage this programatically as statusBarHeight and actionBarSize varies based on device API/resolution.
Here is the result. For testing, have resized background size bit bigger so that overlapping between views and background become visible.
It is probably because of the extra space taken up by the ActionBar in the foreground.
To fix this, you can add a margin to your View in the foreground layout as:
android:layout_marginBottom="?android:attr/actionBarSize"
After test it in AS, I can say you that the right code for you background_drawable is this:
<?xml version="1.0" encoding="UTF-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/background" />
<item android:gravity="center" android:bottom="48dp">
<shape
android:gravity="center"
android:shape="rectangle">
<solid android:color="#color/background_box" />
<size
android:width="10dp"
android:height="10dp" />
</shape>
</item>
using android:top, the red square go more down than center. Need to use android:bottom instead to center background. By my tests results that 48dp is the right value.
How can I add some text to splash screen? My splash screen isn't a separate activity and I don't want to make it as standard activity.
I created it by following this article:
https://android.jlelse.eu/launch-screen-in-android-the-right-way-aca7e8c31f52
Is it possible to add some text?
You can create a new layout for your splash screen. But if you still don't want to create it then there is a nasty hack to achieve it.
Open Paint write your text and save the file as png image
Import png file in drawables and add it in <layer-list> as an item below or above your logo/icon
<item android:bottom="50dp"> set position as you want
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:opacity="opaque">
<item android:drawable="#color/colorPrimary"/>
<item>
<bitmap
android:gravity="center"
android:src="#drawable/icon"/>
</item>
<item android:bottom="50dp">
<bitmap
android:gravity="center"
android:src="#drawable/myTextImage"/>
</item>
</layer-list>
I would like to add padding or space to the logo on both the sides and the code is added here.
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:gravity="fill">
<item android:drawable="#color/ns_theme"></item>
<item>
<bitmap android:gravity="center" android:src="#drawable/logo" />
</item>
</layer-list>
I had the same problem, I tried to add padding to the item but it didn't change anything.
<item
android:left="16dp"
android:right="16dp">
<bitmap android:gravity="center"
android:src="#drawable/splash"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"/>
</item>
The problem was gravity="center", with it the padding were not applied.
Try using android: gravity = "clip_horizontal"
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/splash_color" />
<item
android:left="16dp"
android:right="16dp">
<bitmap android:gravity="clip_horizontal"
android:src="#drawable/splash"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"/>
</item>
</layer-list>
Use
android:bottom=""
android:left=""
android:right=""
android:top=""
Try this
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="fill">
<item android:drawable="#color/ns_theme"></item>
<item
android:bottom="20dp"
android:left="20dp"
android:right="20dp"
android:top="20dp">
<bitmap
android:gravity="center"
android:src="#drawable/logo" />
</item>
</layer-list>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/ns_theme" />
<item
android:drawable="#drawable/ic_logo"
android:left="#dimen/_16sdp"
android:right="#dimen/_16sdp" />
</layer-list>
The problem is probably that your logo is too big (The image file you are using has a pixel width that exceeds the pixel density of the device you are running it on).
Whether or not that is the case, it would probably be better to approach the problem considering the possibility that it could be run on ANY Android device with ANY screen size.
Considering that, there are several options better than simply adding padding in xml... For example, you could:
1) Wrap the image inside another view object that you can control the size and postion of as Bhavik Makwana suggested.
2) Just simply re-edit/resample your image to match the width of your target device and include the white space you desire in the image itself.
3) Design full splash screens that match the entire screen exactly (which combine foreground and background into one image), for example one with 1080 x 1920 resolution, and others for other screen sizes. That way you can control exactly how you want it to look, and the resolution will be 1-1 with no anti-aliasing or resampling.
4) Use this "9-patch" image approach to define an absolute width and height for your logo, but allow stretching of the white space around it to accommodate different screen sizes.
or, finally, the best way:
5) Use a constraint layout with guidelines in order to define the width of your logo in terms of percentage of parent width rather than absolute value.
Some other advice: Unless you are using technique #2 above, make sure you are using a logo.png file like this:
... NOT like this:
KaBOOYOW!
-Boober.
try this code:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/colorPrimary" />
<item>
<bitmap android:src="#drawable/logo"
android:gravity="center" />
</item>
</layer-list>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:gravity="center"
android:layout_height="match_parent"
android:layout_width="match_parent">
<item
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp"
android:gravity="center"
android:background="#mipmap/logo" />
</layer-list>
I am trying to re-create a splash screen to conform to Google standard. I tried creating a background drawable for my splash screen which I'll be setting in theme itself. But I am looking for a way to make the bitmap match the parent.
Below is my drawable code: splash_screen_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:gravity="center">
<bitmap android:src="#drawable/logo_show" android:gravity="center" />
</item>
</layer-list>
Here is code where I am setting this drawable as background of an activity:
<style name="SpTheme" parent="SearchActivityTheme.NoActionBar">
<item name="colorPrimaryDark">#color/colorAccentXDark</item>
<item name="android:alertDialogTheme">#style/AlertDialogTheme</item>
<item name="android:windowBackground">#drawable/splash_screen_bg</item>
</style>
You can't scale image in bitmap. It isn't ImageView so it hasn't scaleType attribute. Your image will scale depending on folder you put it (drawable-xdpi,drawable-nodpi,...). You just can set backround fill color to what you need.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="#color/colorPrimary"/>
<item android:gravity="center">
<bitmap android:src="#drawable/logo_show" android:gravity="center" />
</item>
</layer-list>