Develop Reference

Android, create rounded custom view with checked and unchecked cases

I need to create a custom image view for choosing color by design. When user click the circle, inner white circle with a tick should appear, like in example below:
Otherwise, it should be just a circle shape with some color (unchecked state), like below:
The main problem, that I do not know how to create a selector with the inner circle inside and with keeping the ability to setup color programmatically.
Simple rounded shape I can setup, for example, like this:
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/circle_crop"
android:layout_width="32dp"
android:layout_height="32dp"
android:layout_gravity="center"
android:src="#android:color/holo_red_dark" />
How to modify it to setup white circle with tick inside on a checked state (when user click on it)?

So easy.
1. Create layer-list Drawable Called "icon_check"
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android">
<item //for the round white background
android:bottom="10dp" //margin, "<size>" tag doesn't work
android:end="10dp"
android:start="10dp"
android:top="10dp">
<shape
android:shape="oval">
<solid
android:color="#color/white" />
</shape>
</item>
<item
android:drawable="#drawable/check" //check mark from built-in asset
android:bottom="14dp" //margin, extra 4dp is prefered
android:end="14dp"
android:start="14dp"
android:top="14dp" />
</layer-list>
2. Create selector Drawable Called "foreground_check"
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="#drawable/icon_check" //layer-list created above
android:state_selected="true" />
<item
android:drawable="#android:color/transparent" //key point, 【"#null" doesn't work!!】
android:state_selected="false" />
</selector>
3. Setup CardView
<androidx.cardview.widget.CardView //【MaterialCardView doesn't work!!】
android:id="#+id/cardView"
android:layout_width="40dp"
android:layout_height="40dp"
android:foreground="#drawable/foreground_check" //apply layer-list drawable
app:cardBackgroundColor="#color/black"
app:cardCornerRadius="20dp" /> //half of side length
4. Setup Ui Controller
cardView.setOnClickListener {
it.isSelected = !it.isSelected
}
Result:

You need to create a drawable selector for your image view, for example:
drawable_round_view_selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/drawable_round_view_selected" android:state_selected="true" />
<item android:drawable="#drawable/drawable_round_view_unselected" android:state_selected="false" />
<item android:drawable="#drawable/drawable_round_view_unselected" />
</selector>
drawable_round_view_selected
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="oval">
<size
android:width="40dp"
android:height="40dp" />
<padding
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp" />
<stroke
android:width="1dp"
android:color="#3383FF" />
<solid android:color="#3383FF"/>
</shape>
</item>
<item>
<shape android:shape="oval">
<size
android:width="40dp"
android:height="40dp" />
<solid android:color="#ffffff" />
</shape>
</item>
<item android:drawable="#drawable/ic_baseline_check_24" />
</layer-list>
and drawable_round_view_unselected
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size
android:width="40dp"
android:height="40dp" />
<!-- unselected button background -->
<solid
android:color="#color/black" />
<stroke
android:color="#color/gray_martini"
android:width="1dp"/>
</shape>
After that on your layout set the image view like:
<ImageView
android:id="#+id/roundImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:src="#drawable/drawable_round_view_selector"/>
Finally on your activity or fragment change view depending on selected state:
binding.roundImageView.setOnClickListener {
it.isSelected = !it.isSelected
}
PS: change colors and sizes depending on your requirements.

Drawable with padding for Button with Icon and Text

Im trying to have an icon and text on my custom button. I want both to be centered. For this Im using phillipcalvin-iconbutton. This works quite well however the drawable is set does not have any padding so it looks like this:
I have tried to create another drawable with the same same resource that has a padding like this:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:bottom="3dp"
android:left="3dp"
android:right="3dp"
android:top="1dp">
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/btn_done"
>
<padding
android:left="50dp"
android:top="50dp"
android:right="50dp"
android:bottom="50dp"
/>
</item>
</selector>
</item>
That does not make a difference.
I don't want to use some sort of Layout were I set a wrap a TextView and a ImageView because I loose the button animation.
Any Idea how I can solve this?
Just incase you want to see my custom button:
<ripple
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:color="#color/darkRipple">
<item android:id="#android:id/mask"
android:bottom="4dp" android:left="4dp" android:right="4dp" android:top="4dp"
tools:targetApi="lollipop">
<shape android:shape="rectangle">
<solid android:color="#color/darkRipple" />
<corners android:radius="7dp" />
</shape>
</item>
<item android:id="#android:id/background"
android:bottom="4dp" android:left="4dp" android:right="4dp" android:top="4dp">
<shape android:shape="rectangle">
<corners android:radius="7dp" />
<solid android:color="#color/dark" />
<size android:width="110dp" android:height="40dp" />
</shape>
</item>
</ripple>
and here is how I use it:
<com.phillipcalvin.iconbutton.IconButton
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:background="#drawable/btn_dark"
android:drawableLeft="#drawable/btn_ic_done"
app:iconPadding="10dp"
android:text="DONE"
android:textColor="#color/White"/>

I think one way to get around the problem could be to import the image used as a drawableLeft (android:drawableLeft="#drawable/btn_ic_done" in this case) to android studio as a new Image Asset. That'll allow you to set padding to the image at the time you import it(or you could set padding to the image using some external image editor).
Steps to achieve this:
Right click res folder
res -> new -> image asset
[Customise the image according to your needs][1]
[1]: https://i.stack.imgur.com/6Weu6.png

From official documrntation:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/your.project.package"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
<!-- ... -->
<com.phillipcalvin.iconbutton.IconButton
android:id="#+id/search"
android:drawableLeft="#drawable/action_search"
android:text="#string/search"
app:iconPadding="10dp" />

Android change default button background colors

I was trying to change the button background colors (default, pressed and focus), but I couldn't find a good way. I have read many posts about styling a buuton, but unfortunately these were post to create a compete new style. I want to keep everything the same except for the background colors.
I prefer using xml because I'm using a single layout for multiple activities. I was also looking for a solution that works for android 4.0 and up and below 4.0.
Can someone please help me?

If you want to change the default button color without losing the shadow, Then I recommend changing the style of the required button.
You can simply do this by adding this line to the button tag
style="#style/Widget.AppCompat.Button.Colored"
Sample code will look like this
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/Widget.AppCompat.Button.Colored"
android:text="Rate now"/>
now change the colorAccent to the desired color in the color.xml located under res->values->colors.xml file.
<color name="colorAccent">your color here</color>
you can visit the official developer page to get more information Styling buttons

Create a button_style.xml with the settings you want for your button like the example below, and place this file inside the drawable folder under the res folder.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" >
<shape>
<gradient
android:startColor="#color/MyButtonDarkGray"
android:endColor="#color/MyButtonDarkGray"
android:angle="270" />
<stroke
android:width="0dp"
android:color="#color/Gray" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
<item android:state_focused="true" >
<shape>
<gradient
android:endColor="#color/Green"
android:startColor="#color/Green"
android:angle="270" />
<stroke
android:width="0dp"
android:color="#color/Gray" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
<item>
<shape>
<gradient
android:endColor="#color/green_leaf_top"
android:startColor="#color/green_leaf_bottom"
android:angle="270" />
<stroke
android:width="0dp"
android:color="#color/Gray" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
</selector>
Now, in your styles.xml under the res\values folder, add
<style name="button" parent="#android:style/Widget.Button">
<item name="android:background">#drawable/button_style</item>
</style>
This style will work for all your buttons only.
NOTE: The colors are defined separately in res\values\colors.xml, you can use your own colors.

Here is an xml for changing colors based on the states of button:
Create a drawable resource as below
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_enabled="false"
android:drawable="#android:color/black" />
<item
android:state_pressed="true"
android:state_enabled="true"
android:drawable="#android:color/holo_orange_dark" />
<item
android:state_focused="true"
android:state_enabled="true"
android:drawable="#android:color/holo_green_dark" />
<item
android:state_enabled="true"
android:drawable="#android:color/holo_blue_bright" />
</selector>
In java code set the drawable resource as below:
Button btn = (Button) findViewById(R.id.btn1);
btn.setBackground(this.getResources().getDrawable(R.drawable.mydrawable));
In xml set the drawable as background of the button in the xml:
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/mydrawable" />
NOTE: you can either set in java code or in xml.

Change Button Background when pressed - Android [duplicate]

This question already has answers here:
Make an Android button change background on click through XML
(5 answers)
android button selector
(6 answers)
Closed 8 years ago.
I have a button that is round shape. What I want to do is to change the button color when pressed. Can someone tell me how to add the codes to the background xml? Thank you.
<shape
android:shape="rectangle" android:padding="10dp">
<solid android:color="#c0dfba"/>
<corners
android:bottomRightRadius="5dp"
android:bottomLeftRadius="5dp"
android:topLeftRadius="5dp"
android:topRightRadius="5dp"/>
</shape>

Create XML into res/drawable/button.xml.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" >
<shape>
<solid
android:color="#343434" />
<stroke
android:width="1dp"
android:color="#171717" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
<item>
<shape>
<gradient
android:startColor="#343434"
android:endColor="#171717"
android:angle="270" />
<stroke
android:width="1dp"
android:color="#171717" />
<corners
android:radius="4dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
</selector>
And set to your Button as Background like
<Button
android:id="#+id/btnValidate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:background="#drawable/button"
android:text="SOS Trasition"
android:textColor="#android:color/white"
android:textSize="16sp"
android:textStyle="bold" />
And if you want Change Button Text Color then create XML file at res/color/button_text.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:color="#ffff0000"/> <!-- pressed -->
<item android:state_focused="true"
android:color="#ff0000ff"/> <!-- focused -->
<item android:color="#ff000000"/> <!-- default -->
</selector>
And set this layout XML will apply the color list to a View:
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/button_text"
android:textColor="#color/button_text" />

If you just want to change color of your button then you can also do like this. But this content is only used at runtime.
I know you are asking through XML file but this is very simple and this is just a simple suggestion though.
imageview.setColorFilter(Color.RED);
or also you can pass any color code like
imageView.setColorFilter(0xFFFF3D60, PorterDuff.Mode.MULTIPLY);

crate an xml file in drawable and copy the following lines.. be sure to change the colors as you desire..
and set the xml file as background of your button
android:background="your xml"
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:color="**your desired color when pressed**" />
<item android:color=" **default color when not pressed**" />
</selector>

How to create custom spinner like border around the spinner with down triangle on the right side?

I want to develop custom spinner like line around spinner with triangle at right bottom corner.
like following image
For above fig I wrote my custom spinner like a
spinner.xml
<Spinner android:background="#drawable/spinner_background"/>
spinner_background.xml
<?xml version="1.0" encoding="UTF-8"?>
<item android:state_pressed="true"
android:drawable="#drawable/spinner_ab_pressed_new_theme_bs">
<shape>
<solid
android:color="#color/White" />
<corners android:radius="3dp" />
<padding
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp" />
<stroke
android:width="2dp"
android:color="#color/skyblue" />
</shape>
</item>
<!-- spinner_ab_default_new_theme_bs -> this image for corner triangle -->
<item
android:drawable="#drawable/spinner_ab_default_new_theme_bs" >
<shape>
<solid
android:color="#color/White">
</solid>
<corners android:radius="3dp" />
<padding
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp" />
<stroke
android:width="2dp"
android:color="#color/gray"/>
</shape>
</item>
And I got output like following image
I tried lot but not achieve my goal please anybody have solution to develop spinner.
like above first one image.

Spinner
<Spinner
android:id="#+id/To_Units"
style="#style/spinner_style" />
style.xml
<style name="spinner_style">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:background">#drawable/gradient_spinner</item>
<item name="android:layout_margin">10dp</item>
<item name="android:paddingLeft">8dp</item>
<item name="android:paddingRight">20dp</item>
<item name="android:paddingTop">5dp</item>
<item name="android:paddingBottom">5dp</item>
<item name="android:popupBackground">#DFFFFFFF</item>
</style>
gradient_spinner.xml (in drawable folder)
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item><layer-list>
<item><shape>
<gradient android:angle="90" android:endColor="#B3BBCC" android:startColor="#E8EBEF" android:type="linear" />
<stroke android:width="1dp" android:color="#000000" />
<corners android:radius="4dp" />
<padding android:bottom="3dp" android:left="3dp" android:right="3dp" android:top="3dp" />
</shape></item>
<item ><bitmap android:gravity="bottom|right" android:src="#drawable/spinner_arrow" />
</item>
</layer-list></item>
</selector>
#drawable/spinner_arrow is your bottom right corner image

This is a simple one.
your_layout.xml
<android.support.v7.widget.AppCompatSpinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/spinner_background"
/>
In the drawable folder, spinner_background.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item><layer-list>
<item>
<shape>
<solid
android:color="#color/colorWhite">
</solid>
<corners android:radius="3dp" />
<padding
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp" />
<stroke
android:width="2dp"
android:color="#color/colorDarkGrey"/>
</shape>
</item>
<item >
<bitmap android:gravity="bottom|right"
android:src="#drawable/ic_arrow_drop_down_black_24dp" />
</item>
</layer-list></item>
</selector>
Preview:

You can achieve the following by using a single line in your spinner declaration in XML:
Just add this: style="#android:style/Widget.Holo.Light.Spinner"
This is a default generated style in android. It doesn't contain borders around it though. For that you'd better search something on google.
Hope this helps.
UPDATE:
AFter a lot of digging I got something which works well for introducing border around spinner.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:bottom="8dp"
android:top="8dp">
<shape>
<solid android:color="#android:color/white" />
<corners android:radius="4dp" />
<stroke
android:width="2dp"
android:color="#9E9E9E" />
<padding
android:bottom="16dp"
android:left="8dp"
android:right="16dp"
android:top="16dp" />
</shape>
</item>
</layer-list>
Place this in the drawable folder and use it as a background for spinner. Like this:
<RelativeLayout
android:id="#+id/speaker_relative_layout"
android:layout_width="0dp"
android:layout_height="70dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:background="#drawable/spinner_style"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<Spinner
android:id="#+id/select_speaker_spinner"
style="#style/Widget.AppCompat.DropDownItem.Spinner"
android:layout_width="match_parent"
android:layout_height="70dp"
android:entries="#array/select_speaker_spinner_array"
android:spinnerMode="dialog" />
</RelativeLayout>

If you don't prefer to create multiple XML files, try:
<com.google.android.material.card.MaterialCardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:strokeWidth="1dp"
app:strokeColor="#color/black"
app:cardCornerRadius="4dp">
<androidx.appcompat.widget.AppCompatSpinner
android:id="#+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"/>
</com.google.android.material.card.MaterialCardView>
To change the border color:
app:strokeColor="YOUR_COLOR_HERE"
To change the border's width:
app:strokeWidth="YOUR_DP_WIDTH_HERE"

There are two ways to achieve this.
1- As already proposed u can set the background of your spinner as custom 9 patch Image with all the adjustments made into it .
android:background="#drawable/btn_dropdown"
android:clickable="true"
android:dropDownVerticalOffset="-10dip"
android:dropDownHorizontalOffset="0dip"
android:gravity="center"
If you want your Spinner to show With various different background colors i would recommend making the drop down image transparent, & loading that spinner in a relative layout with your color set in.
btn _dropdown is as:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_window_focused="false" android:state_enabled="true"
android:drawable="#drawable/spinner_default" />
<item
android:state_window_focused="false" android:state_enabled="false"
android:drawable="#drawable/spinner_default" />
<item
android:state_pressed="true"
android:drawable="#drawable/spinner_pressed" />
<item
android:state_focused="true" android:state_enabled="true"
android:drawable="#drawable/spinner_pressed" />
<item
android:state_enabled="true"
android:drawable="#drawable/spinner_default" />
<item
android:state_focused="true"
android:drawable="#drawable/spinner_pressed" />
<item
android:drawable="#drawable/spinner_default" />
</selector>
where the various states of pngwould define your various States of spinner seleti

To change only "background" (add corners, change color, ....) you can put it into FrameLayout with wanted background drawable, else you need to make nine patch background for to not lose spinner arrow. Spinner background is transparent.

You could design a simple nine-patch png image and use it as the background of spinner. Using GIMP you can put both border and right triangle in image.

It's super easy you can just add this to your Adapter -> getDropDownView
getDropDownView:
convertView.setBackground(getContext().getResources().getDrawable(R.drawable.bg_spinner_dropdown));
bg_spinner_dropdown:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#color/white" />
<corners
android:bottomLeftRadius=enter code here"25dp"
android:bottomRightRadius="25dp"
android:topLeftRadius="25dp"
android:topRightRadius="25dp" />
</shape>