我想在Android中的TextView中显示图像,并认为这可以通过Html.fromHtml()
实现。我找到了不同的教程,其中图像是本地资源。当我有图像的URL时,它也可以吗?如果是,有人可以给我一个例子吗?
答案 0 :(得分:1)
您可以使用WebView显示图像,而不是TextView。如果您需要显示笑脸,则需要提取该关键字并替换为特定图像并绘制它。为此,您需要创建自定义视图。
答案 1 :(得分:1)
我有解决方案。放下以下代码,在文本视图中添加微笑。
private static final Factory spannableFactory = Spannable.Factory
.getInstance();
private static final Map<Pattern, Integer> emoticons = new HashMap<Pattern, Integer>();
static {
addPattern(emoticons, ":)", R.drawable.happy);
addPattern(emoticons, ":(", R.drawable.sad);
addPattern(emoticons, ":D", R.drawable.very_happy);
// ...as many pattern you want. But make sure you have images in drawable directory
}
private static void addPattern(Map<Pattern, Integer> map, String smile,
int resource) {
map.put(Pattern.compile(Pattern.quote(smile)), resource);
}
public static boolean addSmiles(Context context, Spannable spannable) {
boolean hasChanges = false;
for (Entry<Pattern, Integer> entry : emoticons.entrySet()) {
Matcher matcher = entry.getKey().matcher(spannable);
while (matcher.find()) {
boolean set = true;
for (ImageSpan span : spannable.getSpans(matcher.start(),
matcher.end(), ImageSpan.class))
if (spannable.getSpanStart(span) >= matcher.start()
&& spannable.getSpanEnd(span) <= matcher.end())
spannable.removeSpan(span);
else {
set = false;
break;
}
if (set) {
hasChanges = true;
spannable.setSpan(new ImageSpan(context, entry.getValue()),
matcher.start(), matcher.end(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
return hasChanges;
}
public static Spannable getSmiledText(Context context, CharSequence text) {
Spannable spannable = spannableFactory.newSpannable(text);
addSmiles(context, spannable);
return spannable;
}
执行复制粘贴后,编写以下代码以在文本视图中设置微笑。
textView.setText(getSmiledText(ActivityName.this,"Hi :) How are you...??? :D I am very :("));