The wheel color picker that you are talking about is in the API Demos.

https://android.googlesource.com/platform/development/+/master/samples/ApiDemos/src/com/example/android/apis/graphics/ColorPickerDialog.java

Created ColorPickerPreference to use in preferences.
Used above submitted color-picker-view
can find it here:
https://github.com/attenzione/android-ColorPickerPreference

Also will share similar ColorPickerPreference with Rotary Picker (used it before)

This one from Yuku ( http://code.google.com/p/android-color-picker/ ) is really kewl. It&#39;s open source under Apache license, and is much nicer than the Android sample one. It&#39;s also a library project, so it&#39;s really simple to integrate. I&#39;ve just added it last week to DigiClock widget, and so far my users are impressed!

You can use CommonsWare&#39;s [cwac-colormixer][1].

It&#39;s an android library now! :)


  [1]: https://github.com/commonsguy/cwac-colormixer

A rather advanced one from OI Flashlight is [here][1].


  [1]: http://code.google.com/p/openintents/source/browse/#svn/trunk/Flashlight/src/org/openintents/widget

In a PHP program, I sequentially read a bunch of files (with `file_get_contents`), `gzdecode` them, `json_decode` the result, analyze the contents, throw most of it away, and store about 1% in an array.

Unfortunately, with each iteration (I traverse over an array containing the filenames), there seems to be some memory lost (according to `memory_get_peak_usage`, about 2-10 MB each time). I have double- and triple-checked my code; I am not storing unneeded data in the loop (and the needed data hardly exceeds about 10MB overall), but I am frequently rewriting (actually, strings in an array). Apparently, PHP does not free the memory correctly, thus using more and more RAM until it hits the limit.

Is there any way to do a forced garbage collection? Or, at least, to find out where the memory is used?


Force freeing memory in PHP

This is my code:

    &lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.01 Transitional//EN&quot;
    	&quot;http://www.w3.org/TR/html4/loose.dtd&quot;&gt; 
    &lt;html&gt; 
    	&lt;head&gt; 
    		&lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, user-scalable=no&quot;&gt; 
    	&lt;/head&gt; 
    &lt;body&gt; 
    		&lt;style type=&quot;text/css&quot; media=&quot;screen&quot;&gt; 
    
    		&lt;/style&gt; 
    		
    		&lt;!--&lt;div id=&quot;map_canvas&quot; style=&quot;width: 500px; height: 300px;background:blue;&quot;&gt;&lt;/div&gt;--&gt;
    
    		&lt;div class=b style=&quot;width: 200px; height: 200px;background:pink;position:absolute;left:500px;top:100px;&quot;&gt;&lt;/div&gt;
    		&lt;script src=&quot;jquery-1.4.2.js&quot; type=&quot;text/javascript&quot;&gt;&lt;/script&gt;
    		&lt;script src=&quot;jquery-ui-1.8rc3.custom.min.js&quot; type=&quot;text/javascript&quot;&gt;&lt;/script&gt;
    		&lt;script type=&quot;text/javascript&quot; charset=&quot;utf-8&quot;&gt; 
    
    		&lt;/script&gt; 
    	&lt;/body&gt; 
    &lt;/html&gt;


Thanks

How do I make a div element editable (like a textarea when I click it)?

Does anyone know of a quick color picker widget that I could grab to use in my application? 

I&#39;ve seen one in a few different applications that have a wheel with colors, and that you tap in the center to select, but I&#39;m not sure where to find it. 

Any color picker would be fine though.


Android Color Picker

Does anyone know of a quick color picker widget that I could grab to use in my application?
I've seen one in a few different applications that have a wheel with colors, and that you tap in the center to select, but I'm not sure where to find it.
Any color picker would be fine though.

Is there a Java package with all the annoying time constants like
milliseconds/seconds/minutes in a minute/hour/day/year? I&#39;d hate to duplicate something like that.

Time consts in Java?

While working with Java, I find it hard to position my main window in the center of the screen when I start the application.

Is there any way I can do that?
It doesn&#39;t have to be vertically centered, horizontal alignment is the more important goal for me. But vertical alignment is also welcome.

How to set JFrame to appear centered, regardless of monitor resolution?

I have an ArrayList that I want to use to hold RaceCar objects that extend the Thread class as soon as they are finished executing. A class, called Race, handles this ArrayList using a callback method that the RaceCar object calls when it is finished executing. The callback method, addFinisher(RaceCar finisher), adds the RaceCar object to the ArrayList. This is supposed to give the order in which the Threads finish executing.

I know that ArrayList isn&#39;t synchronized and thus isn&#39;t thread-safe. I tried using the Collections.synchronizedCollection(c Collection) method by passing in a new ArrayList and assigning the returned Collection to an ArrayList. However, this gives me a compiler error:

    Race.java:41: incompatible types
    found   : java.util.Collection
    required: java.util.ArrayList
    finishingOrder = Collections.synchronizedCollection(new ArrayList(numberOfRaceCars));

Here is the relevant code:

    public class Race implements RaceListener {
        private Thread[] racers;
        private ArrayList finishingOrder;
        
        //Make an ArrayList to hold RaceCar objects to determine winners
        finishingOrder = Collections.synchronizedCollection(new ArrayList(numberOfRaceCars));
        		
        //Fill array with RaceCar objects
        for(int i=0; i&lt;numberOfRaceCars; i++) {
	    racers[i] = new RaceCar(laps, inputs[i]);
		
            //Add this as a RaceListener to each RaceCar
            ((RaceCar) racers[i]).addRaceListener(this);
        }

        //Implement the one method in the RaceListener interface
        public void addFinisher(RaceCar finisher) {
            finishingOrder.add(finisher);
        }

What I need to know is, am I using a correct approach and if not, what should I use to make my code thread-safe? Thanks for the help!

How do I make my ArrayList Thread-Safe? Another approach to problem in Java?

I started learning Java. When would I use a HashMap over a TreeMap?

What is the difference between a HashMap and a TreeMap?

The heap memory is garbage collected in Java.

Is the stack garbage collected as well?

How is stack memory reclaimed?

Is the stack garbage collected in Java?

I just started developing a simple Android application while I&#39;m still learning the platform.

I&#39;m using Eclipse IDE with the ADT plugin 0.9.6.

I need to know if it&#39;s possible to view the `Activity` stack that is associated with a Task?

Is there any way through the DDMS tool or through any other technique?

Essentially what I need is to be able to see the stack activity of a task to make sure that the application behaves as expected.

I know that it&#39;s possible to control the task behavior in some extent through the use of flags in the `Intent` object and through some attributes of the `&lt;activity&gt;` element.

However it would be nice to have a sort of tool - especially in debug mode or so - that would allow developers to see the `Activity` stack straight forward.



View the Task&#39;s activity stack

I think I&#39;m getting senile because I was convinced that to give a name to your application, you had to fill this part of the manifest:

    &lt;application android:icon=&quot;@drawable/icon&quot;  android:label=&quot;MyApplicationName&quot;&gt;
However for a reason I don&#39;t understand, my application gets the name of my first activity, in which I load data, thus, it is called &quot;Loading&quot;, defined as follows in the manifest: 

    &lt;activity android:name=&quot;AccueilSplash&quot; android:label=&quot;Loading&quot;&gt;
   &lt;intent-filter&gt;
    &lt;action android:name=&quot;android.intent.action.MAIN&quot; /&gt;
    &lt;category android:name=&quot;android.intent.category.LAUNCHER&quot; /&gt;
   &lt;/intent-filter&gt;
  &lt;/activity&gt;

Any idea why that is?

Naming my application in android

According to Google, I must &quot;*deactivate any calls to Log methods in the source code*&quot; before publishing my Android app to Google Play. Extract from section 3 of the &lt;a href=&quot;https://developer.android.com/studio/publish/preparing.html#turn-off-logging-and-debugging&quot;&gt;publication checklist&lt;/a&gt;:

&gt; Make sure you deactivate logging and disable the debugging option before you build your application for release. You can deactivate logging by removing calls to Log methods in your source files.

My open-source project is large and it is a pain to do it manually every time I release. Additionally, removing a Log line is potentially tricky, for instance:

    if(condition)
      Log.d(LOG_TAG, &quot;Something&quot;);
    data.load();
    data.show();

If I comment the Log line, then the condition applies to the next line, and chances are load() is not called. Are such situations rare enough that I can decide it should not exist?

So, is there a better source code-level way to do that? Or maybe some clever ProGuard syntax to efficiently but safely remove all Log lines?

How to remove all debug logging calls before building the release version of an Android app?

How can I change the star colors and size of the stars?

Android RatingBar change star colors

I want to have 5 lines for the height of the text area. I am using the following code.

    &lt;EditText
        android:layout_width=&quot;fill_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:gravity=&quot;center&quot;
        android:singleLine=&quot;false&quot;
        android:lines=&quot;5&quot;
        android:layout_marginLeft=&quot;10dip&quot;
        android:layout_marginRight=&quot;10dip&quot; /&gt;

The text area looks fine, but the problem is that the cursor is blinking in the middle of the text field. I want it to blink at first line, at the first character of the text field.

Android: Vertical alignment for multi line EditText (Text area)

I need to determine whether a selected UIColor (picked by the user) is dark or bright, so I can change the color of a line of text that sits on top of that color, for better readability.

Here&#39;s an example in Flash/Actionscript (with demo):
http://web.archive.org/web/20100102024448/http://theflashblog.com/?p=173

Any thoughts?

Cheers,
Andre

**UPDATE**

Thanks to everyone&#39;s suggestions, here&#39;s the working code:

    - (void) updateColor:(UIColor *) newColor
    {
    	const CGFloat *componentColors = CGColorGetComponents(newColor.CGColor);
    	
    	CGFloat colorBrightness = ((componentColors[0] * 299) + (componentColors[1] * 587) + (componentColors[2] * 114)) / 1000;
    	if (colorBrightness &lt; 0.5)
    	{
    		NSLog(@&quot;my color is dark&quot;);
    	}
    	else
    	{
    		NSLog(@&quot;my color is light&quot;);
    	}
    }

Thanks once again :)

Check if UIColor is dark or bright?

How do I print coloured characters to a Linux terminal that supports it?

How do I tell whether the terminal supports colour codes?


How do I output coloured text to a Linux terminal?

I want to output many different foreground colors with one statement.

    PS C:\&gt; Write-Host &quot;Red&quot; -ForegroundColor Red
    Red

This output is red.

    PS C:\&gt; Write-Host &quot;Blue&quot; -ForegroundColor Blue
    Blue

This output is blue.

    PS C:\&gt; Write-Host &quot;Red&quot;, &quot;Blue&quot; -ForegroundColor Red, Blue
    Red Blue

This output is magenta, but I want the color to be red for the word red, and blue for the word blue via the one command. How can I do that?



Multiple foreground colors in PowerShell in one command

Writing a small command line tool, it would be nice to output in different colours. Is this possible?

Is it possible to write to the console in colour in .NET?

When defining colors using &quot;shorthand hexidecimal&quot; (`style=&quot;color: #FFF;&quot;`), is there a defined method for expanding the shorthand? (`style=&quot;color: #F0F0F0;&quot;` or `style=&quot;color: #FFFFFF;&quot;`)

Do all browsers use the same expansion method? Is this behavior by specification (if so, where is it defined)? Does the expansion method perhaps vary between CSS 1/2/3?

I&#39;ve observed that &quot;most browsers&quot; expand to `#FFFFFF`.

Are there any other places (outside of HTML/CSS) where this shorthand notation is allowed, but the expansion method is different?

I&#39;ve always avoided using shorthand hex, because I&#39;ve never known the answers to these questions...

Content Type	Original Author	Original Content on Stackoverflow
Question	Kleptine	View Question on Stackoverflow
Solution 1 - Java	Mark B	View Answer on Stackoverflow
Solution 2 - Java	Attenzione	View Answer on Stackoverflow
Solution 3 - Java	DavidG	View Answer on Stackoverflow
Solution 4 - Java	Macarse	View Answer on Stackoverflow
Solution 5 - Java	yanchenko	View Answer on Stackoverflow

Android Color Picker

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

Solution 5 - Java

How do I make a div element editable (like a textarea when I click it)?

Force freeing memory in PHP

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