Adding opacity to setStroke() programmatically











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I am trying to set opacity to Border color using:



d.setStroke(5 , Color.parseColor("#4A000000"))


The result I get is a border with 50% dark color and 50% of opacity applied.



How to make that to blend like a normal background color, ColorUtils.setAlphaComponent(color, 100)?










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  • Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
    – Ivan
    Nov 8 at 11:15










  • I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
    – pixelWorld
    Nov 8 at 11:26















up vote
0
down vote

favorite












I am trying to set opacity to Border color using:



d.setStroke(5 , Color.parseColor("#4A000000"))


The result I get is a border with 50% dark color and 50% of opacity applied.



How to make that to blend like a normal background color, ColorUtils.setAlphaComponent(color, 100)?










share|improve this question
























  • Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
    – Ivan
    Nov 8 at 11:15










  • I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
    – pixelWorld
    Nov 8 at 11:26













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am trying to set opacity to Border color using:



d.setStroke(5 , Color.parseColor("#4A000000"))


The result I get is a border with 50% dark color and 50% of opacity applied.



How to make that to blend like a normal background color, ColorUtils.setAlphaComponent(color, 100)?










share|improve this question















I am trying to set opacity to Border color using:



d.setStroke(5 , Color.parseColor("#4A000000"))


The result I get is a border with 50% dark color and 50% of opacity applied.



How to make that to blend like a normal background color, ColorUtils.setAlphaComponent(color, 100)?







android alpha






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share|improve this question













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edited Nov 8 at 14:52









André Sousa

1,012818




1,012818










asked Nov 8 at 11:05









pixelWorld

86




86












  • Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
    – Ivan
    Nov 8 at 11:15










  • I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
    – pixelWorld
    Nov 8 at 11:26


















  • Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
    – Ivan
    Nov 8 at 11:15










  • I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
    – pixelWorld
    Nov 8 at 11:26
















Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
– Ivan
Nov 8 at 11:15




Why dont you like the border opacity at 50%? Can you explain what are you trying to achieve more precisely. Cant understand why the result of your code does not fit what you want.
– Ivan
Nov 8 at 11:15












I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
– pixelWorld
Nov 8 at 11:26




I am trying to have a border with color and a variable alpha value, so that the border itself would get a transparency blended.
– pixelWorld
Nov 8 at 11:26












1 Answer
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0
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You could use setStroke(),the second parameter is a ColorStateList.



And each item in a ColorStateList must define an android:color attribute like below:



<item android:state_enabled="false"
android:color="?android:attr/colorAccent"
android:alpha="0.5" /> //use this xml attribute to set opacity.


Below is a complete ColorStateList example:



<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true"
android:color="@color/sample_focused" />
<item android:state_pressed="true"
android:state_enabled="false"
android:color="@color/sample_disabled_pressed" />
<item android:state_enabled="false"
android:color="@color/sample_disabled_not_pressed" />
<item android:color="@color/sample_default"
android:alpha="0.5"/>
</selector>


After creating a ColorStateList resource xml, use it in setStroke() method.






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    up vote
    0
    down vote













    You could use setStroke(),the second parameter is a ColorStateList.



    And each item in a ColorStateList must define an android:color attribute like below:



    <item android:state_enabled="false"
    android:color="?android:attr/colorAccent"
    android:alpha="0.5" /> //use this xml attribute to set opacity.


    Below is a complete ColorStateList example:



    <selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true"
    android:color="@color/sample_focused" />
    <item android:state_pressed="true"
    android:state_enabled="false"
    android:color="@color/sample_disabled_pressed" />
    <item android:state_enabled="false"
    android:color="@color/sample_disabled_not_pressed" />
    <item android:color="@color/sample_default"
    android:alpha="0.5"/>
    </selector>


    After creating a ColorStateList resource xml, use it in setStroke() method.






    share|improve this answer

























      up vote
      0
      down vote













      You could use setStroke(),the second parameter is a ColorStateList.



      And each item in a ColorStateList must define an android:color attribute like below:



      <item android:state_enabled="false"
      android:color="?android:attr/colorAccent"
      android:alpha="0.5" /> //use this xml attribute to set opacity.


      Below is a complete ColorStateList example:



      <selector xmlns:android="http://schemas.android.com/apk/res/android">
      <item android:state_focused="true"
      android:color="@color/sample_focused" />
      <item android:state_pressed="true"
      android:state_enabled="false"
      android:color="@color/sample_disabled_pressed" />
      <item android:state_enabled="false"
      android:color="@color/sample_disabled_not_pressed" />
      <item android:color="@color/sample_default"
      android:alpha="0.5"/>
      </selector>


      After creating a ColorStateList resource xml, use it in setStroke() method.






      share|improve this answer























        up vote
        0
        down vote










        up vote
        0
        down vote









        You could use setStroke(),the second parameter is a ColorStateList.



        And each item in a ColorStateList must define an android:color attribute like below:



        <item android:state_enabled="false"
        android:color="?android:attr/colorAccent"
        android:alpha="0.5" /> //use this xml attribute to set opacity.


        Below is a complete ColorStateList example:



        <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_focused="true"
        android:color="@color/sample_focused" />
        <item android:state_pressed="true"
        android:state_enabled="false"
        android:color="@color/sample_disabled_pressed" />
        <item android:state_enabled="false"
        android:color="@color/sample_disabled_not_pressed" />
        <item android:color="@color/sample_default"
        android:alpha="0.5"/>
        </selector>


        After creating a ColorStateList resource xml, use it in setStroke() method.






        share|improve this answer












        You could use setStroke(),the second parameter is a ColorStateList.



        And each item in a ColorStateList must define an android:color attribute like below:



        <item android:state_enabled="false"
        android:color="?android:attr/colorAccent"
        android:alpha="0.5" /> //use this xml attribute to set opacity.


        Below is a complete ColorStateList example:



        <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_focused="true"
        android:color="@color/sample_focused" />
        <item android:state_pressed="true"
        android:state_enabled="false"
        android:color="@color/sample_disabled_pressed" />
        <item android:state_enabled="false"
        android:color="@color/sample_disabled_not_pressed" />
        <item android:color="@color/sample_default"
        android:alpha="0.5"/>
        </selector>


        After creating a ColorStateList resource xml, use it in setStroke() method.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 8 at 11:23









        navylover

        2,39421117




        2,39421117






























             

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