The question:
text = text + CepVizyon.getPhoneCode() + "nn"
+ getText(R.string.currentversion) + CepVizyon.getLicenseText();
activationText.setText(text);
myTextView.setText(text);
I want to change color for CepVizyon.getPhoneCode()‘s string. How can I do this?
The Solutions:
Below are the methods you can try. The first solution is probably the best. Try others if the first one doesn’t work. Senior developers aren’t just copying/pasting – they read the methods carefully & apply them wisely to each case.
Method 1
Spannable is more flexible:
String text2 = text + CepVizyon.getPhoneCode() + "nn"
+ getText(R.string.currentversion) + CepVizyon.getLicenseText();
Spannable spannable = new SpannableString(text2);
spannable.setSpan(new ForegroundColorSpan(Color.WHITE), text.length(), (text + CepVizyon.getPhoneCode()).length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
myTextView.setText(spannable, TextView.BufferType.SPANNABLE);
Method 2
If you have static text that needs color, you can add it without any code via the strings file:
<string name="already_have_an_account">Already have an account? <font color='#01C6DB'>Login</font></string>
then
<TextView
android:layout_width="wrap_content"
android:layout_height="64dp"
android:text="@string/already_have_an_account"/>
result
I’m not sure which API versions this works on, but it doesn’t work for API 19 that I’ve tested so far, so probably only some of the most recent API versions support this.
As @hairraisin mentioned in the comments, try using fgcolor instead of color for the font color, then it should work for lower API levels, but need more testing to be sure.
Method 3
myTextView.setText(Html.fromHtml(text + "<font color=white>" + CepVizyon.getPhoneCode() + "</font><br><br>"
+ getText(R.string.currentversion) + CepVizyon.getLicenseText()));
Method 4
Here solution in Kotlin that uses SpannableString to change color of part of a string.
val phoneCodeColor = ContextCompat.getColor(this, R.color.myColor)
val text = SpannableStringBuilder()
.color(phoneCodeColor) { append("${ CepVizyon.getPhoneCode() }") }
.append("nn")
.append(getString(R.string.currentversion))
.append(${ CepVizyon.getLicenseText() })
activationText.text = text
myTextView.text = text
Method 5
With regards to Maneesh’s answer, this will work but you need to add and escape the quotes for the color attribute.
myTextView.setText(Html.fromHtml(text + "<font color="#FFFFFF">" + CepVizyon.getPhoneCode() + "</font><br><br>"
+ getText(R.string.currentversion) + CepVizyon.getLicenseText()));
Method 6
It is good for me!
Spannable spannable = new SpannableString("ABC In-Network DEF");
String str = spannable.toString();
iStart = str.indexOf("In-Network");
iEnd = iStart + 10;/*10 characters = in-network. */
SpannableString ssText = new SpannableString(spannable);
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View widget) {
//your code at here.
}
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
ds.setUnderlineText(true);
ds.setColor(getResources().getColor(R.color.green));
}
};
ssText.setSpan(clickableSpan, iStart, iEnd, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(ssText);
mTextView.setMovementMethod(LinkMovementMethod.getInstance());
mTextView.setHighlightColor(Color.TRANSPARENT);
mTextView.setEnabled(true);
Method 7
Here’s a colorize function based on andyboot’s answer:
/**
* Colorize a specific substring in a string for TextView. Use it like this: <pre>
* textView.setText(
* Strings.colorized("The some words are black some are the default.","black", Color.BLACK),
* TextView.BufferType.SPANNABLE
* );
* </pre>
* @param text Text that contains a substring to colorize
* @param word The substring to colorize
* @param argb The color
* @return the Spannable for TextView's consumption
*/
public static Spannable colorized(final String text, final String word, final int argb) {
final Spannable spannable = new SpannableString(text);
int substringStart=0;
int start;
while((start=text.indexOf(word,substringStart))>=0){
spannable.setSpan(
new ForegroundColorSpan(argb),start,start+word.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
);
substringStart = start+word.length();
}
return spannable;
}
Method 8
Use character escapes + Html.fromHtml()
How to store the String in the string resource folder
<string name="textFromRes">
<font color="#FF0000">This is colored in red </font> This is not
</string>
How to show in TextView?
String text = this.getResources().getString(R.string.textFromRes);
htmlText.setText(Html.fromHtml(text));
Bonus:
The String in the output looks like this
<string name="textFromRes">
<font color="#FF0000">This is colored in red </font> This is not
<br />
<h1> This is h1 heading </h1>
<br />
<h3> This is h2 subheading</h3>
<br />
<b> This text is bold</b>
<br />
<i> This text is italic</i>
<br />
Android users expect your app to look and behave in a way that is
consistent with the platform. Not only should you follow material
design guidelines for visual and navigation patterns,
but you should also follow quality guidelines for compatibility,
performance, security, and more.
<br />
<br />
The following links provide everything you need to design a high quality Android app.
</string>
Method 9
I have made this little function, just pass in your text to color, the start and end indexes of what you want to color of that text and the color itself
Kotlin
private fun colorMyText(inputText:String,startIndex:Int,endIndex:Int,textColor:Int):Spannable{
val outPutColoredText: Spannable = SpannableString(inputText)
outPutColoredText.setSpan(
ForegroundColorSpan(textColor), startIndex, endIndex,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
)
return outPutColoredText
}
Usage
txt_comment.text = colorMyText("Comentario: ${item.comentario}",0,13,Color.BLACK)
Method 10
I didn’t like the idea of doing this by code every time i want to color parts of the text which i have been doing a lot in all of my apps (and since in some case text is being set in runtime with different inline-defined colors) so i created my own MarkableTextView.
The idea was to:
- Detect XML tags from string
- Identify and match tag name
- Extract and save attributes and position of text
- Remove tag and keep content
- Iterate through attributes and apply styles
Here’s the process step by step:
First i needed a way to find XML tags in a given string and Regex did the trick..
<([a-zA-Z]+(?:-[a-zA-Z0-9]+)*)(?:s+([^>]*))?>([^>][^<]*)</1s*>
For the above to match an XML tag it has to have the following criteria:
- Valid tag name like
<a><a ><a-a><a ..attrs..>but not< a><1> - Closing tag that has a matching name like
<a></a>but not<a></b> - Any content, since there’s no need to style “nothing”
Now for the attributes we’re going to use this one..
([a-zA-Z]+)s*=s*(['"])s*([^'"]+?)s*2
It has the same concept and generally i didn’t need to go far for both since the compiler will take care of the rest if anything goes out of format.
Now we need a class that can hold the extracted data:
public class MarkableSheet {
private String attributes;
private String content;
private int outset;
private int ending;
private int offset;
private int contentLength;
public MarkableSheet(String attributes, String content, int outset, int ending, int offset, int contentLength) {
this.attributes = attributes;
this.content = content;
this.outset = outset;
this.ending = ending;
this.offset = offset;
this.contentLength = contentLength;
}
public String getAttributes() {
return attributes;
}
public String getContent() {
return content;
}
public int getOutset() {
return outset;
}
public int getContentLength() {
return contentLength;
}
public int getEnding() {
return ending;
}
public int getOffset() {
return offset;
}
}
Before anything else, we’re going to add this cool iterator that i’ve been using for long to loop through matches (can’t remember the author):
public static Iterable<MatchResult> matches(final Pattern p, final CharSequence input) {
return new Iterable<MatchResult>() {
public Iterator<MatchResult> iterator() {
return new Iterator<MatchResult>() {
// Use a matcher internally.
final Matcher matcher = p.matcher(input);
// Keep a match around that supports any interleaving of hasNext/next calls.
MatchResult pending;
public boolean hasNext() {
// Lazily fill pending, and avoid calling find() multiple times if the
// clients call hasNext() repeatedly before sampling via next().
if (pending == null && matcher.find()) {
pending = matcher.toMatchResult();
}
return pending != null;
}
public MatchResult next() {
// Fill pending if necessary (as when clients call next() without
// checking hasNext()), throw if not possible.
if (!hasNext()) { throw new NoSuchElementException(); }
// Consume pending so next call to hasNext() does a find().
MatchResult next = pending;
pending = null;
return next;
}
/** Required to satisfy the interface, but unsupported. */
public void remove() { throw new UnsupportedOperationException(); }
};
}
};
}
MarkableTextView:
public class MarkableTextView extends AppCompatTextView {
public MarkableTextView(Context context) {
super(context);
}
public MarkableTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MarkableTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void setText(CharSequence text, BufferType type) {
// Intercept and process text
text = prepareText(text.toString());
super.setText(text, type);
}
public Spannable Markable;
private Spannable prepareText(String text) {
String parcel = text;
Multimap<String, MarkableSheet> markableSheets = ArrayListMultimap.create();
// Used to correct content position after tossing tags
int totalOffset = 0;
// Iterate through text
for (MatchResult match : matches(Markable.Patterns.XML, parcel)) {
// Get tag name
String tag = match.group(1);
// Match with a defined tag name "case-sensitive"
if (!tag.equals(Markable.Tags.MARKABLE)) {
// Break if no match
break;
}
// Extract data
String attributes = match.group(2);
String content = match.group(3);
int outset = match.start(0);
int ending = match.end(0);
int offset = totalOffset; // offset=0 since no preceded changes happened
int contentLength = match.group(3).length();
// Calculate offset for the next element
totalOffset = (ending - outset) - contentLength;
// Add to markable sheets
MarkableSheet sheet =
new MarkableSheet(attributes, content, outset, ending, offset, contentLength);
markableSheets.put(tag, sheet);
// Toss the tag and keep content
Matcher reMatcher = Markable.Patterns.XML.matcher(parcel);
parcel = reMatcher.replaceFirst(content);
}
// Initialize spannable with the modified text
Markable = new SpannableString(parcel);
// Iterate through markable sheets
for (MarkableSheet sheet : markableSheets.values()) {
// Iterate through attributes
for (MatchResult match : matches(Markable.Patterns.ATTRIBUTES, sheet.getAttributes())) {
String attribute = match.group(1);
String value = match.group(3);
// Apply styles
stylate(attribute,
value,
sheet.getOutset(),
sheet.getOffset(),
sheet.getContentLength());
}
}
return Markable;
}
Finally, styling, so here’s a very simple styler i made for this answer:
public void stylate(String attribute, String value, int outset, int offset, int length) {
// Correct position
outset -= offset;
length += outset;
if (attribute.equals(Markable.Tags.TEXT_STYLE)) {
if (value.contains(Markable.Tags.BOLD) && value.contains(Markable.Tags.ITALIC)) {
Markable.setSpan(
new StyleSpan(Typeface.BOLD_ITALIC),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
else if (value.contains(Markable.Tags.BOLD)) {
Markable.setSpan(
new StyleSpan(Typeface.BOLD),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
else if (value.contains(Markable.Tags.ITALIC)) {
Markable.setSpan(
new StyleSpan(Typeface.ITALIC),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (value.contains(Markable.Tags.UNDERLINE)) {
Markable.setSpan(
new UnderlineSpan(),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
if (attribute.equals(Markable.Tags.TEXT_COLOR)) {
if (value.equals(Markable.Tags.ATTENTION)) {
Markable.setSpan(
new ForegroundColorSpan(ContextCompat.getColor(
getContext(),
R.color.colorAttention)),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
else if (value.equals(Markable.Tags.INTERACTION)) {
Markable.setSpan(
new ForegroundColorSpan(ContextCompat.getColor(
getContext(),
R.color.colorInteraction)),
outset,
length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
And here’s how the Markable class containing the definitions looks like:
public class Markable {
public static class Patterns {
public static final Pattern XML =
Pattern.compile("<([a-zA-Z]+(?:-[a-zA-Z0-9]+)*)(?:\s+([^>]*))?>([^>][^<]*)</\1\s*>");
public static final Pattern ATTRIBUTES =
Pattern.compile("(\S+)\s*=\s*(['"])\s*(.+?)\s*\2");
}
public static class Tags {
public static final String MARKABLE = "markable";
public static final String TEXT_STYLE = "textStyle";
public static final String BOLD = "bold";
public static final String ITALIC = "italic";
public static final String UNDERLINE = "underline";
public static final String TEXT_COLOR = "textColor";
public static final String ATTENTION = "attention";
public static final String INTERACTION = "interaction";
}
}
All that we need now is to reference a string and basically it should look like this:
<string name="markable_string">
<![CDATA[Hello <markable textStyle="underline" textColor="interaction">world</markable>!]]>
</string>
Make sure to wrap the tags with a CDATA Section and escape " with .
I made this as a modular solution to process parts of the text in all different ways without the need of stuffing unnecessary code behind.
Method 11
I did as andy boot said, but i had a clickable span as well, and it didn’t work because the order the setSpans were called. So you have to first call the spannable.setSpan(clickableSpanand... then the spannable.setSpan(new ForegroundColorSpan... to get the color in the TextView
Method 12
With a general-purpose Kotlin extension function, it would look like this:
/**
* Change the color of a part of the text contained in this textView
*
* @param subStringToColorize has to already be set in the textView's text
* @param colorResId
*/
fun TextView.colorize(subStringToColorize: String, @ColorRes colorResId: Int) {
val spannable: Spannable = SpannableString(text)
val startIndex = text.indexOf(subStringToColorize, startIndex = 0, ignoreCase = false)
val endIndex = startIndex + subStringToColorize.length
val color: Int = ContextCompat.getColor(context, colorResId)
if (startIndex != -1) {
spannable.setSpan(ForegroundColorSpan(color),
startIndex,
endIndex,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
setText(spannable, TextView.BufferType.SPANNABLE)
}
}
Method 13
Inspired by Alejandro H. Cruz’s answer above.
His function only works for a single substring match, I have updated his method to use Regex and should update colors on all matches:
fun TextView.colorizeAll(subStringToColorize: String, @ColorRes colorResId: Int) {
val color: Int = ContextCompat.getColor(context, colorResId)
val spannable: Spannable = SpannableString(text)
val pattern = subStringToColorize.toRegex()
val matches = pattern.findAll(text, 0)
matches.forEach { match ->
val startIndex = match.range.first
val endIndex = match.range.last + match.range.step
spannable.setSpan(ForegroundColorSpan(color),
startIndex,
endIndex,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
setText(spannable, TextView.BufferType.SPANNABLE)
}
}
Method 14
I created this little helper method that can be called from a TextView:
fun TextView.attributedString(
forText: String,
foregroundColor: Int? = null,
style: StyleSpan? = null
) {
val spannable: Spannable = SpannableString(text)
// check if the text we're highlighting is empty to abort
if (forText.isEmpty()) {
return
}
// compute the start and end indices from the text
val startIdx = text.indexOf(forText)
val endIdx = startIdx + forText.length
// if the indices are out of bounds, abort as well
if (startIdx < 0 || endIdx > text.length) {
return
}
// check if we can apply the foreground color
foregroundColor?.let {
spannable.setSpan(
ForegroundColorSpan(it),
startIdx,
endIdx,
Spannable.SPAN_INCLUSIVE_EXCLUSIVE
)
}
// check if we have a stylespan
style?.let {
spannable.setSpan(
style,
startIdx,
endIdx,
Spannable.SPAN_INCLUSIVE_EXCLUSIVE
)
}
// apply it
text = spannable
}
To use it:
plateText.text = "Hello world!"
// This will color the part "world" to whatever color you have defined
// And make the word **bold**.
plateText.attributedString(
"world",
getColor(R.color.colorMatchingText, null),
StyleSpan(Typeface.BOLD)
)
Tested on API 29, cheers!
Method 15
SpannableStringBuilder builder = new SpannableStringBuilder();
String the = "The ";
SpannableString theSpannable= new SpannableString(the);
builder.append(theSpannable);
String author = "author ";
SpannableString authorSpannable= new SpannableString(author);
authorSpannable.setSpan(new RelativeSizeSpan(1.2f), 0,authorSpannable.length(), 0); // set size
authorSpannable.setSpan(new ForegroundColorSpan(Color.BLACK), 0, authorSpannable.length(), 0);
builder.append(authorSpannable);
String has = "has ";
SpannableString hasSpannable= new SpannableString(has);
builder.append(hasSpannable);
String approved = "approved ";
SpannableString approvedSpannable= new SpannableString(approved);
approvedSpannable.setSpan(new RelativeSizeSpan(1.2f), 0,approvedSpannable.length(), 0); // set size
StyleSpan boldSpan = new StyleSpan(Typeface.BOLD);
approvedSpannable.setSpan(boldSpan, 0, approvedSpannable.length() + 0, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
approvedSpannable.setSpan(new ForegroundColorSpan(ContextCompat.getColor(this, R.color.CLR_PRESSED_SAVED)), 0,
approvedSpannable.length(), 0);
builder.append(approvedSpannable);
String white = "your access to this share. Do you want re-access now?";
SpannableString whiteSpannable= new SpannableString(white);
builder.append(whiteSpannable);
_AccessStatusText.setText(builder, TextView.BufferType.SPANNABLE);
Method 16
its Simple
String text = "We've sent the code to ";
String text2 = text + getEmail() + "nn";
Spannable spannable = new SpannableString(text2);
spannable.setSpan(new ForegroundColorSpan(Color.BLUE), text.length(), (text + getEmail()).length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
mBinding.textViewStatus.setText(spannable, TextView.BufferType.SPANNABLE);
Method 17
DO NOT USE Html.fromHtml to avoid fragmented behavior. Spannable or SpannableStringBuilder is the best way to do this with ForegroundColorSpan or BackgroundColorSpan depending on your requirements. Html or HtmlCompat tag even with style color or background-color is not realiable as it does not work on all SDK specially on lower version such as 21, same case for emojis.
Example case:
<span style="background-color:red">⬆</span>
When the Html string above converts to Spanned using HtmlCompat.fromHtml and use it in setText() the style does not work on older SDK version.
Method 18
One way is to split myTextView to few separate TextViews, one of which would be only for phone code. Then controlling color of this specific TextView is pretty straight-forward.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0