I am developing an application in which there will be a search screen where user can search for specific keywords and that keyword should be highlighted. I have found Html.fromHtml method.
But I will like to know whether its the proper way of doing it or not.
Please let me know your views on this.
The answer is
This can be achieved using a Spannable String. You will need to import the following
import android.text.SpannableString;
import android.text.style.BackgroundColorSpan;
import android.text.style.StyleSpan;
And then you can change the background of the text using something like the following:
TextView text = (TextView) findViewById(R.id.text_login);
text.setText("");
text.append("Add all your funky text in here");
Spannable sText = (Spannable) text.getText();
sText.setSpan(new BackgroundColorSpan(Color.RED), 1, 4, 0);
Where this will highlight the charecters at pos 1 - 4 with a red color. Hope this helps!
font is deprecated use span instead Html.fromHtml("<span style=color:red>"+content+"</span>")
Using color value from xml resource:
int labelColor = getResources().getColor(R.color.label_color);
String ?olorString = String.format("%X", labelColor).substring(2); // !!strip alpha value!!
Html.fromHtml(String.format("<font color=\"#%s\">text</font>", ?olorString), TextView.BufferType.SPANNABLE);
textview.setText(Html.fromHtml("<font color='rgb'>"+text contain+"</font>"));
It will give the color exactly what you have made in html editor , just set the textview and concat it with the textview value. Android does not support span color, change it to font color in editor and you are all set to go.
To make part of your text underlined and colored
in your strings.xml
<string name="text_with_colored_underline">put the text here and <u><font color="#your_hexa_color">the underlined colored part here<font><u></string>
then in the activity
yourTextView.setText(Html.fromHtml(getString(R.string.text_with_colored_underline)));
and for clickable links:
<string name="text_with_link"><![CDATA[<p>text before link<a href=\"http://www.google.com\">title of link</a>.<p>]]></string>
and in your activity:
yourTextView.setText(Html.fromHtml(getString(R.string.text_with_link)));
yourTextView.setMovementMethod(LinkMovementMethod.getInstance());
String name = modelOrderList.get(position).getName(); //get name from List
String text = "<font color='#000000'>" + name + "</font>"; //set Black color of name
/* check API version, according to version call method of Html class */
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.N) {
Log.d(TAG, "onBindViewHolder: if");
holder.textViewName.setText(context.getString(R.string._5687982) + " ");
holder.textViewName.append(Html.fromHtml(text));
} else {
Log.d(TAG, "onBindViewHolder: else");
holder.textViewName.setText("123456" + " "); //set text
holder.textViewName.append(Html.fromHtml(text, Html.FROM_HTML_MODE_LEGACY)); //append text into textView
}
Alternative solution: Using a WebView instead. Html is easy to work with.
WebView webview = new WebView(this);
String summary = "<html><body>Sorry, <span style=\"background: red;\">Madonna</span> gave no results</body></html>";
webview.loadData(summary, "text/html", "utf-8");
First Convert your string into HTML then convert it into spannable. do as suggest the following codes.
Spannable spannable = new SpannableString(Html.fromHtml(labelText));
spannable.setSpan(new ForegroundColorSpan(Color.parseColor(color)), spannable.toString().indexOf("•"), spannable.toString().lastIndexOf("•") + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
Adding also Kotlin version with:
- getting text from resources (
strings.xml) - getting color from resources (
colors.xml) - "fetching HEX" moved as extension
fun getMulticolorSpanned(): Spanned {
// Get text from resources
val text: String = getString(R.string.your_text_from_resources)
// Get color from resources and parse it to HEX (RGB) value
val warningHexColor = getHexFromColors(R.color.your_error_color)
// Use above string & color in HTML
val html = "<string>$text<span style=\"color:#$warningHexColor;\">*</span></string>"
// Parse HTML (base on API version)
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
Html.fromHtml(html, Html.FROM_HTML_MODE_LEGACY)
} else {
Html.fromHtml(html)
}
}
And Kotlin extension (with removing alpha):
fun Context.getHexFromColors(
colorRes: Int
): String {
val labelColor: Int = ContextCompat.getColor(this, colorRes)
return String.format("%X", labelColor).substring(2)
}
Demo
Source: Stackoverflow.com