EditText突出顯示文本

Question

我正在製作android應用程序，它必須檢查列表中是否有任何單詞並突出顯示它們。我嘗試下面的代碼：

public void checkSyntax() { 
//Text variable 
data = et.getText().toString(); 
//Colored text 
Spanned text = Html.fromHtml("<font color=\"red\">text</font>"); 
Spanned smth = Html.fromHtml("<font color=\"green\">its just example</font>"); 
Spanned owo = Html.fromHtml("<font color=\"blue\">i know html</font>"); 
//Replace words to colored text in string 
data.replace("text", text); 
data.replace("smth", smth); 
data.replace("owo", owo); 
//Set new text 
    et.removeTextChangedListener(tw); 
    et.setText(data); 
    et.addTextChangedListener(tw); 
} 

Answer 1

見https://developer.android.com/reference/android/text/SpannableStringBuilder.html

和

https://developer.android.com/reference/android/text/style/ForegroundColorSpan.html

也看看這個線程：SpannableStringBuilder to create String with multiple fonts/text sizes etc Example?

您的代碼可能看起來像：

ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED); 

SpannableStringBuilder b = new SpannableStringBuilder(data); 

int redStart = data.indexOf("text"); 
int redEnd = redStart + "text".length(); 

if (redStart >= 0) { 
    b.setSpan(redSpan, redStart, endEnd, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); 
} 

et.setText(b);