http://blog.csdn.net/fancylovejava/article/details/39927539?utm_source=tuicool&utm_medium=referral
项目开发中需要实现这种效果
多余两行,两行最后是省略号,省略号后面是下拉更多
之前用过的是Html.fromHtml去处理图文混排的,仅仅是文字后图片或者文字颜色字体什么的,
但是这里需要在最后文字的省略号后面添加图片。
直接上代码吧,代码注释很多,慢慢研究
- private void toggleEllipsize(final TextView tv,final String desc){
- if(desc == null){
- return;
- }
- tv.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
- @Override
- public void onGlobalLayout() {
- boolean isEllipsized = (tv.getTag()==null||tv.getTag().equals(false))?false:(Boolean)tv.getTag();
- if(isEllipsized){
- tv.setTag(false);
- tv.setText(desc);
- }else{
- tv.setTag(true);
- int paddingLeft = tv.getPaddingLeft();
- int paddingRight = tv.getPaddingRight();
- TextPaint paint = tv.getPaint();
- float moreText = tv.getTextSize()*3;
- float availableTextWidth = (tv.getWidth()-paddingLeft-paddingRight)*2-moreText;
- CharSequence ellipsizeStr = TextUtils.ellipsize(desc,paint,availableTextWidth,TextUtils.TruncateAt.END);
- if(ellipsizeStr.length()<desc.length()){
- /*String html = “<img src=’game_info_lookmore’/>”;
- CharSequence charSequence = Html.fromHtml(html, new ImageGetter() {
- @Override
- public Drawable getDrawable(String source) {
- Drawable drawable = getResources().getDrawable(
- getResourceId(source));
- drawable.setBounds(
- 0,
- 0,
- drawable.getIntrinsicWidth()
- – DensityUtil.dip2px(GridGameInfoActivity.this, 3),
- drawable.getIntrinsicHeight()
- – DensityUtil.dip2px(GridGameInfoActivity.this, 1));
- return drawable;
- }
- }, null);
- ellipsizeStr = ellipsizeStr.toString() + charSequence.toString();*/
- CharSequence temp = ellipsizeStr+“.”;
- SpannableStringBuilder ssb = new SpannableStringBuilder(temp);
- Drawable dd = getResources().getDrawable(R.drawable.game_info_lookmore);
- dd.setBounds(0, 0, dd.getIntrinsicWidth(), dd.getIntrinsicHeight());
- ImageSpan is = new ImageSpan(dd, ImageSpan.ALIGN_BASELINE);
- ssb.setSpan(is, temp.length()-1, temp.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
- // int yellow = getResources().getColor(R.color.red);
- // ssb.setSpan(new ForegroundColorSpan(yellow),ssb.length()-2,ssb.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- tv.setText(ssb);
- tv.setMovementMethod(LinkMovementMethod.getInstance());
- }else{
- tv.setText(desc);
- }
- }
- if(Build.VERSION.SDK_INT>=16){
- tv.getViewTreeObserver().removeOnGlobalLayoutListener(this);
- }else{
- tv.getViewTreeObserver().removeGlobalOnLayoutListener(this);
- }
- }
- });
- }
主要是通过SpannableStringBuilder把省略的文字和最后的图片给拼接起来。也可以最后拼接的是文字,
不让…更多
转篇博客:
Android spannableStringBuilder用法整理
- spannableStringBuilder 用法详解:
- SpannableString ss = new SpannableString(“红色打电话斜体删除线绿色下划线图片:.”);
- //用颜色标记文本
- ss.setSpan(new ForegroundColorSpan(Color.RED), 0, 2,
- //setSpan时需要指定的 flag,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括).
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //用超链接标记文本
- ss.setSpan(new URLSpan(“tel:4155551212”), 2, 5,
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //用样式标记文本(斜体)
- ss.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 5, 7,
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //用删除线标记文本
- ss.setSpan(new StrikethroughSpan(), 7, 10,
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //用下划线标记文本
- ss.setSpan(new UnderlineSpan(), 10, 16,
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //用颜色标记
- ss.setSpan(new ForegroundColorSpan(Color.GREEN), 10, 13,
- Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- //获取Drawable资源
- Drawable d = getResources().getDrawable(R.drawable.icon);
- d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
- //创建ImageSpan
- ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);
- //用ImageSpan替换文本
- ss.setSpan(span, 18, 19, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
- txtInfo.setText(ss);
- txtInfo.setMovementMethod(LinkMovementMethod.getInstance()); //实现文本的滚动
- 通常用于显示文字,但有时候也需要在文字中夹杂一些图片,比如QQ中就可以使用表情图片,又比如需要的文字高亮显示等等,如何在android中也做到这样呢?
- 记得android中有个android.text包,这里提供了对文本的强大的处理功能。
- 添加图片主要用SpannableString和ImageSpan类:
- Drawable drawable = getResources().getDrawable(id);
- drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
- //需要处理的文本,[smile]是需要被替代的文本
- SpannableString spannable = new SpannableString(getText().toString()+“[smile]”);
- //要让图片替代指定的文字就要用ImageSpan
- ImageSpan span = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE);
- //开始替换,注意第2和第3个参数表示从哪里开始替换到哪里替换结束(start和end)
- //最后一个参数类似数学中的集合,[5,12)表示从5到12,包括5但不包括12
- spannable.setSpan(span, getText().length(),getText().length()+“[smile]”.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
- setText(spannable);
- 将需要的文字高亮显示:
- public void highlight(int start,int end){
- SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());//用于可变字符串
- ForegroundColorSpan span=new ForegroundColorSpan(Color.RED);
- spannable.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- setText(spannable);
- }
- 加下划线:
- public void underline(int start,int end){
- SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());
- CharacterStyle span=new UnderlineSpan();
- spannable.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- setText(spannable);
- }
- 组合运用:
- SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());
- CharacterStyle span_1=new StyleSpan(android.graphics.Typeface.ITALIC);
- CharacterStyle span_2=new ForegroundColorSpan(Color.RED);
- spannable.setSpan(span_1, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- spannable.setSpan(span_2, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- setText(spannable);
- 案例:带有\n换行符的字符串都可以用此方法显示2种颜色
- /**
- * 带有\n换行符的字符串都可以用此方法显示2种颜色
- * @param text
- * @param color1
- * @param color2
- * @return
- */
- public SpannableStringBuilder highlight(String text,int color1,int color2,int fontSize){
- SpannableStringBuilder spannable=new SpannableStringBuilder(text);//用于可变字符串
- CharacterStyle span_0=null,span_1=null,span_2;
- int end=text.indexOf(“\n”);
- if(end==-1){//如果没有换行符就使用第一种颜色显示
- span_0=new ForegroundColorSpan(color1);
- spannable.setSpan(span_0, 0, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- }else{
- span_0=new ForegroundColorSpan(color1);
- span_1=new ForegroundColorSpan(color2);
- spannable.setSpan(span_0, 0, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- spannable.setSpan(span_1, end+1, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- span_2=new AbsoluteSizeSpan(fontSize);//字体大小
- spannable.setSpan(span_2, end+1, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- }
- return spannable;
- }
有疑问可以留言,交流讨论
http://blog.csdn.net/caiyunfreedom/article/details/6763834
实现下划线及颜色设置:
public class AtActivity extends Activity {
LinearLayout ll;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ll=(LinearLayout)findViewById(R.id.ll);
TextView tv=new TextView(this);
tv.getPaint().setFlags(Paint.UNDERLINE_TEXT_FLAG);//下划线
tv.setText(“使用代码实现下划线样式”);
tv.setTextColor(Color.WHITE);
ll.addView(tv);
tv=new TextView(this);
tv.setText(Html.fromHtml(“<u>使用html实现下划线样式</u>”));
ll.addView(tv);
}
}设置超链接样式:默认的超链接是蓝色的,我们现在设置成前景红色
public class AtActivity extends Activity {
LinearLayout ll;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ll=(LinearLayout)findViewById(R.id.ll);
TextView tv=new TextView(this);
tv.setText(Html.fromHtml(“<a href=\”http://blog.csdn.net/CAIYUNFREEDOM\”>自定义的超链接样式</a>”));
tv.setMovementMethod(LinkMovementMethod.getInstance());
CharSequence text = tv.getText();
if (text instanceof Spannable){
int end = text.length();
Spannable sp = (Spannable)tv.getText();
URLSpan[] urls = sp.getSpans( 0 , end, URLSpan.class );
SpannableStringBuilder style = new SpannableStringBuilder(text);
style.clearSpans(); // should clear old spans
for (URLSpan url : urls){
URLSpan myURLSpan= new URLSpan(url.getURL());
style.setSpan(myURLSpan,sp.getSpanStart(url),sp.getSpanEnd(url),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
style.setSpan(new ForegroundColorSpan(Color.RED), sp.getSpanStart(url), sp.getSpanEnd(url),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//设置前景色为红色
}
tv.setText(style);
}
ll.addView(tv);
tv=new TextView(this);
tv.setText(Html.fromHtml(“<a href=\”http://blog.csdn.net/CAIYUNFREEDOM\”>默认的超链接样式</a>”));
tv.setMovementMethod(LinkMovementMethod.getInstance());
ll.addView(tv);
}
}
http://blog.csdn.net/xijiaohuangcao/article/details/7839856
我一直都不清楚Spanned.SPAN_EXCLUSIVE_EXCLUSIVE、 Spanned.SPAN_INCLUSIVE_EXCLUSIVE、Spanned.SPAN_EXCLUSIVE_INCLUSIVE、 Spanned.SPAN_INCLUSIVE_INCLUSIVE这几个参数的含义,直到看到这位老兄的blog,
http://aichixihongshi.iteye.com/blog/1207503
我把关键部分摘抄如下:
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE, 这是在 setSpan 时需要指定的 flag,它的意义我试了很久也没试出来,睡个觉,今天早上才突然有点想法,试之,果然。它是用来标识在 Span 范围内的文本前后输入新的字符时是否把它们也应用这个效果。分别有 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括)、 Spanned.SPAN_INCLUSIVE_EXCLUSIVE(前面包括,后面不包括)、 Spanned.SPAN_EXCLUSIVE_INCLUSIVE(前面不包括,后面包括)、 Spanned.SPAN_INCLUSIVE_INCLUSIVE(前后都包括)。看个截图就更明白了:
对比一下
http://blog.csdn.net/hhbgk/article/details/9866543
通过SpannableString来给特殊的字符加特别的颜色。
主要的函数内容如下
- private void initData() {
- AssetManager am = getAssets();//得到Assets对象
- InputStream in = null;
- try {
- in = am.open(“test/english.txt”);//打开assets目录下面的文件并赋值给InputStream对象
- } catch (IOException e2) {
- e2.printStackTrace();
- }
- String result = “”;
- long size = 0;
- try {
- size = in.available();
- } catch (IOException e1) {
- e1.printStackTrace();
- }
- byte[] buffer = new byte[(int) size];
- try {
- in.read(buffer);
- } catch (IOException e) {
- e.printStackTrace();
- }
- result = EncodingUtils.getString(buffer, “UTF-8”);//字符转换,默认使用UTF-8
- SpannableString ss = new SpannableString(result);
- int length = result.length();//此字符串数
- int i = 0;
- char ch;
- int start = 0, end = 0;
- boolean bSpecial = false;
- while (length > 0)
- {
- ch = result.charAt(i);
- if (ch == ‘[‘) {
- bSpecial = true;
- start = i;//记录限定字符的开始位置
- }
- if (ch == ‘]’ && bSpecial) {
- end = i;//记录限定字符的结束位置
- //给限定字符之间的字符着色
- ss.setSpan(new ForegroundColorSpan(Color.RED), start+1, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
- bSpecial = false;
- start = 0;
- end = 0;
- }
- length–;
- i++;
- }
- tv.setText(ss);//显示
- }
http://blog.csdn.net/tlc0211/article/details/8617668
TextView是用来显示文本的,有时需要给TextView中的个别字设置为超链接,或者设置个别字的颜色、字体等,那就需要用到Spannable对象,可以借助Spannable对象实现以上设置
myTextView = (TextView) this.findViewById(R.id.myTextView);
//创建一个 SpannableString对象
SpannableString sp = new SpannableString(“这句话中有百度超链接,有高亮显示,这样,或者这样,还有斜体.”);
//设置超链接
sp.setSpan(new URLSpan(“http://www.baidu.com”), 5, 7,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//设置高亮样式一
sp.setSpan(new BackgroundColorSpan(Color.RED), 17 ,19,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
//设置高亮样式二
sp.setSpan(new ForegroundColorSpan(Color.YELLOW),20,24,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
//设置斜体
sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 27, 29, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
//SpannableString对象设置给TextView
myTextView.setText(sp);
//设置TextView可点击
myTextView.setMovementMethod(LinkMovementMethod.getInstance());
textview显示不同的颜色、样式来表示,需要用到SpannableString对象来处理
下面是从网上找的一段代码,已验证过:
mTextView = (TextView)findViewById(R.id.test);
SpannableString tSS = new SpannableString(“SpannableString学习中”);
tSS.setSpan(new BackgroundColorSpan(Color.RED), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //红色高亮
tSS.setSpan(new UnderlineSpan(), 15, 18,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //下划线
tSS.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 2, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //斜体
mTextView.setText(tSS);
关键方法:
public void setSpan (Object what, int start, int end, int flags)
主要是start跟end
start是起始位置,无论中英文,都算一个。从0开始计算起。end是结束位置,所以处理的文字,包含开始位置,但不包含结束位置。
下面解决点击不同文字跳转到不同activity的问题:
直接贴代码:
package com.feel;
import android.app.Activity;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class TextViewJump2Activity extends Activity {
/** Called when the activity is first created. */
private TextView mClickableText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout layout = new LinearLayout(this);
mClickableText = new TextView(this);
mClickableText.setClickable(true);
mClickableText.setTextSize(20);
layout.addView(mClickableText);
setContentView(layout);
mClickableText.setText(getClickableSpan());
mClickableText.setMovementMethod(LinkMovementMethod.getInstance());
}
private SpannableString getClickableSpan() {
View.OnClickListener l = new View.OnClickListener() {
//如下定义自己的动作
public void onClick(View v) {
Toast.makeText(TextViewJump2Activity.this, “Click Success”, Toast.LENGTH_SHORT).show();
//在这里就可以做跳转到activity或者弹出对话框的操作了
}
};
SpannableString spanableInfo = new SpannableString(“This is a test, Click Here!”);
int start = 16;
int end = spanableInfo.length();
spanableInfo.setSpan(new Clickable(l), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return spanableInfo;
}
}
class Clickable extends ClickableSpan implements OnClickListener {
private final View.OnClickListener mListener;
public Clickable(View.OnClickListener l) {
mListener = l;
}
@Override
public void onClick(View v) {
mListener.onClick(v);
}
}