TextView的setText注意事项

##Do not concatenate text displayed with setText
当使用下面的方法对TextView进行setText时

prodNameView.setText("" + name);
prodOriginalPriceView.setText("" + String.format(getString(R.string.string_product_rate_with_ruppe_sign), "" + new BigDecimal(price).setScale(2, RoundingMode.UP)));

会有如下提示

Do not concatenate text displayed with setText. Use resource string with placeholders.

When calling TextView#setText:

Never call Number#toString() to format numbers; it will not handle fraction separators and locale-specific digits properly. Consider using String#format with proper format specifications (%d or %f) instead.

Do not pass a string literal (e.g. "Hello") to display text. Hardcoded text can not be properly translated to other languages. Consider using Android resource strings instead.

Do not build messages by concatenating text chunks. Such messages can not be properly translated.

简单来说使用TextView的setText方法时，有三点要注意的：

如果有数字，使用String#format方法来格式化

别硬编码，而是使用Android的String资源文件

别使用+进行字符串拼接

##例子
在String资源文件中声名

<string name="welcome_messages">Hello, %1$s! You have %2$d new messages.</string>

在TextView中通过setText设置

hello.setText(getString(R.string.welcome_messages,"John",10));

##参考
stackoverflow中的问题

Android官方文档