android TextView(4)-SpannableString&SpannableStringBuffer定制文本

实现部分可点击的TextView

效果类似微信朋友圈里点赞的效果

1.初始化n个朋友

StringBuilder sb = new StringBuilder();    for (int i = 0; i < 10; i++) {        sb.append("朋友" + i + "，");    }

2.去除最后的逗号

String likeUsers = sb.substring(0, sb.lastIndexOf("，")).toString();

3.设置文本

mT2.setMovementMethod(LinkMovementMethod.getInstance());mT2.setText(addClickPart(likeUsers), TextView.BufferType.SPANNABLE);

4.addClickPart(String str);实现方法

设置赞的图片

ImageSpan imgspan = new ImageSpan(MyHtmlActivity.this, R.drawable.like);SpannableString spanStr = new SpannableString("p");spanStr.setSpan(imgspan, 0, 1, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);

5.创建一个SpannableStringBuilder对象，连接多个字符串

SpannableStringBuilder ssb = new SpannableStringBuilder(spanStr);ssb.append(str);

6.切割字符串,得到”,”分隔的每个内容

String[] likeUsers = str.split("，");

7.给每个内容设置ClickableSpan

for (int i = 0; i < likeUsers.length; i++) {    final String name = likeUsers[i];    final int start = str.indexOf(name) + spanStr.length();    ssb.setSpan(new ClickableSpan() {        @Override        public void onClick(View widget) {            Toast.makeText(MyHtmlActivity.this, name,                    Toast.LENGTH_SHORT).show();        }        @Override        public void updateDrawState(TextPaint ds) {            super.updateDrawState(ds);            //删除下划线，设置字体颜色            ds.setColor(Color.BLUE);            ds.setUnderlineText(false);        }    },start,start + name.length(),0);}

包括两个重载方法一个处理点击事件,另一个指定样式

8.最后返回这个SpannableStringBuilder用于setText

return ssb.append("等" + likeUsers.length + "个人觉得很赞");

本篇和上篇 完整代码:

public class MyHtmlActivity extends AppCompatActivity {private TextView mTv_html;private TextView mT2;private TextView mT1;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_my_html);    mTv_html = (TextView) findViewById(R.id.tv_html);    mT2 = (TextView) findViewById(R.id.txtTwo);//        setHtml1();//        setHtml2();//        setHtml3();    setHtml4();}private void setHtml4() {    StringBuilder sb = new StringBuilder();    for (int i = 0; i < 10; i++) {        sb.append("朋友" + i + "，");    }    String likeUsers = sb.substring(0, sb.lastIndexOf("，")).toString();    mT2.setMovementMethod(LinkMovementMethod.getInstance());    mT2.setText(addClickPart(likeUsers), TextView.BufferType.SPANNABLE);}//定义一个点击每个部分文字的处理方法private SpannableStringBuilder addClickPart(String str) {    //赞的图标    ImageSpan imgspan = new ImageSpan(MyHtmlActivity.this, R.drawable.like);    SpannableString spanStr = new SpannableString("p");    spanStr.setSpan(imgspan, 0, 1, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);    //创建一个SpannableStringBuilder对象，连接多个字符串    SpannableStringBuilder ssb = new SpannableStringBuilder(spanStr);    ssb.append(str);    String[] likeUsers = str.split("，");    if (likeUsers.length > 0) {        for (int i = 0; i < likeUsers.length; i++) {            final String name = likeUsers[i];            final int start = str.indexOf(name) + spanStr.length();            ssb.setSpan(new ClickableSpan() {                @Override                public void onClick(View widget) {                    Toast.makeText(MyHtmlActivity.this, name,                            Toast.LENGTH_SHORT).show();                }                @Override                public void updateDrawState(TextPaint ds) {                    super.updateDrawState(ds);                    //删除下划线，设置字体颜色                    ds.setColor(Color.BLUE);                    ds.setUnderlineText(false);                }            },start,start + name.length(),0);        }    }    return ssb.append("等" + likeUsers.length + "个人觉得很赞");}private void setHtml3() {    mT1 = (TextView) findViewById(R.id.txtOne);    mT2 = (TextView) findViewById(R.id.txtTwo);    SpannableString span = new SpannableString("红色打电话斜体删除线绿色下划线图片:.");    //1.设置背景色,setSpan时需要指定的flag,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括)    span.setSpan(new ForegroundColorSpan(Color.RED), 0, 2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //2.用超链接标记文本    span.setSpan(new URLSpan("tel:[phone]"), 2, 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //3.用样式标记文本（斜体）    span.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 5, 7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //4.用删除线标记文本    span.setSpan(new StrikethroughSpan(), 7, 10, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //5.用下划线标记文本    span.setSpan(new UnderlineSpan(), 10, 16, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //6.用颜色标记    span.setSpan(new ForegroundColorSpan(Color.GREEN), 10, 13,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);    //7.//获取Drawable资源    Drawable d = getResources().getDrawable(R.drawable.iv_bg);    d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());    //8.创建ImageSpan,然后用ImageSpan来替换文本    ImageSpan imgspan = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);    span.setSpan(imgspan, 18, 19, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);    mT1.setText(span);}private void setHtml2() {    String s = "<img src='iv_bg'/></br>";    Spanned spanned = Html.fromHtml(s, new Html.ImageGetter() {        @Override        public Drawable getDrawable(String source) {            Drawable drawable = null;            try {                Field field = R.drawable.class.getField(source);                String stringId = field.get(null).toString();                int resourceId = Integer.parseInt(stringId);                drawable = getResources().getDrawable(resourceId);                drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());            } catch (NoSuchFieldException e) {                e.printStackTrace();            } catch (IllegalAccessException e) {                e.printStackTrace();            }            return drawable;        }    }, null);    mTv_html.setMovementMethod(LinkMovementMethod.getInstance());    mTv_html.setText(spanned);}private void setHtml1() {    String s = "<font color='blue'><b> 百度一下你就知道</b></font><br> ";    s += "<a href = 'http://www.baidu.com'> 百度</a>";    Spanned spanned = Html.fromHtml(s);    mTv_html.setMovementMethod(LinkMovementMethod.getInstance());    mTv_html.setText(spanned);}

}