TextView 相关UI设置

1. 设置占位符

textView.setText(getResources().getString("已知文案","未知文案"));

2. 一个TextView中文字颜色不同

final ColorStateList greenColors = ColorStateList.valueOf(0xFF48E670);
 SpannableString tSS = new SpannableString(str);
 tSS.setSpan(new TextAppearanceSpan(null, 0, 0, greenColors, null), 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  //前5个字是绿色
textView.setText(tSS);