一个TextView显示多个颜色

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方法一：

String newMessageInfo = "我正在<font color='red'>" + "红色内容"
+ "</font>TextView学习显示不同颜色";
textView.setText(Html.fromHtml(newMessageInfo));

方法二：

textView = (TextView) findViewById(R.id.textview);  
SpannableStringBuilder builder = new SpannableStringBuilder(textView.getText().toString());  
      
//ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色  
ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED);  
ForegroundColorSpan whiteSpan = new ForegroundColorSpan(Color.WHITE);  
ForegroundColorSpan blueSpan = new ForegroundColorSpan(Color.BLUE);  
ForegroundColorSpan greenSpan = new ForegroundColorSpan(Color.GREEN);  
ForegroundColorSpan yellowSpan = new ForegroundColorSpan(Color.YELLOW);  
      
builder.setSpan(redSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
builder.setSpan(whiteSpan, 1, 2, Spannable.SPAN_INCLUSIVE_INCLUSIVE);  
builder.setSpan(blueSpan, 2, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
builder.setSpan(greenSpan, 3, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
builder.setSpan(yellowSpan, 4,5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
      
textView.setText(builder);

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