android-修改TextView中部分文字的颜色

[java] view plain copy

textView=(TextView)findViewById(R.id.textview);
SpannableStringBuilderbuilder=newSpannableStringBuilder(textView.getText().toString());
//ForegroundColorSpan为文字前景色，BackgroundColorSpan为文字背景色
ForegroundColorSpanredSpan=newForegroundColorSpan(Color.RED);
ForegroundColorSpanwhiteSpan=newForegroundColorSpan(Color.WHITE);
ForegroundColorSpanblueSpan=newForegroundColorSpan(Color.BLUE);
ForegroundColorSpangreenSpan=newForegroundColorSpan(Color.GREEN);
ForegroundColorSpanyellowSpan=newForegroundColorSpan(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);

Spanned.SPAN_EXCLUSIVE_EXCLUSIVE，这是在 setSpan 时需要指定的 flag，它的意义我试了很久也没试出来，睡个觉，今天早上才突然有点想法，试之，果然。它是用来标识在 Span 范围内的文本前后输入新的字符时是否把它们也应用这个效果。分别有 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括)、Spanned.SPAN_INCLUSIVE_EXCLUSIVE(前面包括，后面不包括)、Spanned.SPAN_EXCLUSIVE_INCLUSIVE(前面不包括，后面包括)、Spanned.SPAN_INCLUSIVE_INCLUSIVE(前后都包括)。看个截图就更明白了：

对比一下

测试的Demo

public void setTextColor3() {mTextView = (TextView) findViewById(R.id.textview);// ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色//ForegroundColorSpan不能被复用，属于一次性属性，只能给一个字段赋这样的属性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);String[] array = { "word", "tell", "me", "hhe", "wo", "heihei","shuia", "ui" };int[] score = { 90, 59, 90, 12, 22, 61, 11, 79 };SpannableStringBuilder builder1 = new SpannableStringBuilder("");int start = 0;int end = 0;for (int i = 0; i < array.length; i++) {start = builder1.length();builder1.append(array[i] + " ");//添加你的字符串end = builder1.length();if (score[i] > 60) {builder1.setSpan(new ForegroundColorSpan(Color.GREEN), start,end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);} else {builder1.setSpan(new ForegroundColorSpan(Color.RED), start,end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);}}mTextView.setText(builder1);}

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