Android change background color onclick
We start with font and background colors, but beside a standard text color there are also other options, like links, highlight and hint colors. Moreover we would check current colors. Colors in Android are defined in RGB format. Colors defined by user could be stored in colors. Read our Everything about colors in Android appendix to understand how to define colors.
In this lesson we just focus on using colors, not defining them. For instance RGB red color value is F Of course you have also live preview for layout created in XML files.
How to change the background color of a page on a button click?
In colors. As an argument we give a color, but we could do it in many different ways all described in the appendix. Remember that referring to colors. But we could use android:background.
It allows to use as a background various things, like a graphic, but those options we will practice later. And this is combination of text color and background color Android Studio. Step 3. Colors for special types of text. Beside standard text we could modify color of links. If there is a valid link in a string, it could have different color than rest of a text.
Add this into strings. We could mark links with color different than text color Android Virtual Device. Another two options would be more useful when we start to input a text like EditText and SearchView : highlight color and hint color. First changes color of marked text and second sets a color of hint explaining what to do. Mind that they all return negative int values not positive hex as we used for colors definition.
For instance red is not 00FF00, but Remember that you could compare it with predefined constants like Color. RED instead of integer values. There are also methods for so called color state lists, like getTextColors.
Android: ListVIew: change background onClick
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Android RelativeLayout change color onClick
I am trying to create a simple app for training purposes to swap between a white and black background upon clicking the app.
I am trying to keep everything general, so as to allow for scalability to slightly other purposes. There are a number of similar ideas of this site, but none quite answers my question.
I have borrowed some ideas from these posts however. So that it keeps general, I am using a function changeScreen which could be easily changed for other purposes.Android how to : Change Background color Randomly on button click event
The functions getColor and setBackgroundColor are guessed and dont compile. I would like to keep it as separate as possible to where it is used, for abstraction purposes.
Should it be passed or not? This is the colors xml file, I know I need to define the color white in colors.
Learn more. Asked 4 years, 3 months ago. Active 1 year, 9 months ago. Viewed 6k times. My problems are: 1 I am not sure what the argument s to changeScreen should be or whether the function needs arguments at all. Here is my java file, MainActivity. Color; import android. Layout; import android. MainActivity ; MainActivity.Posted by: admin February 23, Leave a comment.
How do i change the color of a Relative Layout i use as a clickable on Click like the normal Button? Like i want a visual feedback the layout was pressed. Use selector on the android:background attribute of your RealtiveLayout. Layouts are not displayed into the screen. They only may to conrain views. You shold add some View and then add onClick listener to that view.
Possible dublicate: Android clickable layout. Tags: androidlayout. February 26, Android Leave a comment. Questions: In my layout, I am using falling for predefined values for android:textAppearence. But, there are, as I found, at least 2 ways to define them, which yields a very different result like, di Questions: I have following custom font family code, and i want to have font weight for that font abc. How can solve it? Add menu. How to define textAppearence value in android layout-Exceptionshub February 26, Android Leave a comment Questions: In my layout, I am using falling for predefined values for android:textAppearence.I have ListVIewand i want to change background of items when i click on itto show it is selected.
But when I use this code under text it change every 13 items background color. And i want to change background only for one item. Related Articles ListView changes background automatically I have a ListView in which i load an image from the server inside an ImageView object and then set my layout object background to be this imageview the row list background. However, as i scroll the list my background for each row changes and is not. I'd like to create a custom effect on my ListView in Android.
I have a list with text items - a kind a menu. And I'd like to change the text's color and add a shadow for it! I've a cu. I know that this is a very common problem faced when using ListView. However, I couldn't find anything wrong with my implementation as I have properly followed the ViewHolder Pattern for my Custom Adapter. The Problem: Changes made to an item, such a. I have a adapter populating my Listview from retrieved json.
I want to change the colour of certain cells dependant on position i. But using the current code i get the desired effect but it gets repeated as i scro. You can change it in the function onCheckedChanged.
Here is link for you. And you can use selector. Can You help me please. I need to change background color of my list view item which is selected manually by setSelection int pos function and I need to stay with new color until new setSelection call.
I have read some topics of how to do this, but. I have a Custom ListView in my application and it has some TextViews inside it to which the styles are provided at run time. When I scroll down the ListView and again scroll up, the styles given previously to the TextView changes to some different st.Not sure how to get past this challenge Please explain changes and why the changes are made Thank you.
I'm not sure what you're asking. Did you also import RelativeLayout? I created a project that meets what you've presented and the background changes to red from onCreate. Are you interested in how to change the color based on user interaction or to continuously change as the activity remains running? If you just want the background to change continuously automatically, here's an option:.
Gotcha, sorry. I haven't done that challenge. I've found some of those challenges to be rather picky in their result expectations. You have the correct code, just the wrong color. It wants you to set the background color to Green not red.
Thanks Kate I seem to got stuck in the training text and got a mental block on the actual request Im trying to make something where I have different links and depending on the link it loads into an imageView below the header called subBanner into a solid color, rather than putting an image file to load.
Could I achieve the same thing using this code. Posting to the forum is only allowed for members with active accounts. Please sign in or sign up to post. I forgot my password. Keith Cox Pro Student 1, Points. Goal is to change the background color of mealLayout.
Bundle; import android. Rob Mount 8, Points. Rob Mount Rob Mount 8, Points. If you just want the background to change continuously automatically, here's an option: Note, this method will create a background thread as a timer import java. Random ; import java.
Timer ; import java. TimerTask ; import android.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Help me in solving this. Thanks in advance. Could not get the above solution to work, so i found another way some sort of a "trick". Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
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Sign in to view. Hi Prashanthlkv, Follow the Instruction to solve your problem.
Maybe not the best practice but it works. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. Linked pull requests. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.