具有不同 textSize 的 TextView

是否可以在一个 TextView 中设置不同的 textSize? 我知道我可以使用以下方法改变文本样式:

TextView textView = (TextView) findViewById(R.id.textView);
Spannable span = new SpannableString(textView.getText());
span.setSpan(arg0, 1, 10, arg3);
textView.setText(span)

我知道范围开始... 文本结束，我想改变大小。但是我可以使用什么作为 arg0和 arg3？

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最佳答案

Try 

span.setSpan(new RelativeSizeSpan(0.8f), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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I know very late to answer but people are still might have the same question.Even I struggled a lot on this. Suppose you have these two strings inside your strings.xml file

 <string name="my_text">You will need a to complete this assembly</string>
<string name="text_sub1">screwdriver, hammer, and measuring tape</string>

You now need to define two Style for them inside your style.xml with different textSize

<style name="style0">
<item name="android:textSize">19sp</item>
<item name="android:textColor">@color/standout_text</item>
<item name="android:textStyle">bold</item>
</style>
<style name="style1">
<item name="android:textSize">23sp</item>
<item name="android:textColor">@color/standout_light_text</item>
<item name="android:textStyle">italic</item>
</style>

Now from your Java file you need to use the spannable to load these two style and strings on single textView

SpannableString formattedSpan = formatStyles(getString(R.string.my_text), getString(R.string.text_sub0), R.style.style0, getString(R.string.main_text_sub1), R.style.style1);
textView.setText(formattedSpan, TextView.BufferType.SPANNABLE);

Below is the formatStyles method which will return the formatted string after applying the style 

private SpannableString formatStyles(String value, String sub0, int style0, String sub1, int style1)
{
String tag0 = "{0}";
int startLocation0 = value.indexOf(tag0);
value = value.replace(tag0, sub0);


String tag1 = "{1}";
int startLocation1 = value.indexOf(tag1);
if (sub1 != null && !sub1.equals(""))
{
value = value.replace(tag1, sub1);
}
SpannableString styledText = new SpannableString(value);
styledText.setSpan(new TextAppearanceSpan(getActivity(), style0), startLocation0, startLocation0 + sub0.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
if (sub1 != null && !sub1.equals(""))
{
styledText.setSpan(new TextAppearanceSpan(getActivity(), style1), startLocation1, startLocation1 + sub1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}


return styledText;
}
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Try with AbsoluteSizeSpan

snackbarText.setSpan(new AbsoluteSizeSpan(fontsize, true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

The complete code is:

SpannableStringBuilder snackbarText = new SpannableStringBuilder();
snackbarText.append("Your text");
snackbarText.setSpan(new AbsoluteSizeSpan(fontsize, true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
Snackbar.make(getCurrentFocus(), snackbarText, Snackbar.LENGTH_LONG).setAction("Action", null).show();`

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