例子1:
设置部分文字背景高亮显示:
public class HighLightActivity extends Activity { String strs="我的心太乱了,给我点空白。"; TextView textview; int start =3; int end = 5; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.high_light); textview=(TextView)findViewById(R.id.textview); SpannableStringBuilder style=new SpannableStringBuilder(strs); style.setSpan(new BackgroundColorSpan(Color.RED),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
同时设置文字和背景高亮显示:
public class HighLightActivity extends Activity { String strs="我的心太乱了,给我点空白。"; TextView textview; int start =3; int end = 5; /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.high_light); textview=(TextView)findViewById(R.id.textview); SpannableStringBuilder style=new SpannableStringBuilder(strs); style.setSpan(new BackgroundColorSpan(Color.RED),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); style.setSpan(new ForegroundColorSpan(Color.RED),7,9,Spannable.SPAN_EXCLUSIVE_INCLUSIVE); 参数说明: Spannable.SPAN_EXCLUSIVE_EXCLUSIVE API里面解释:Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand to include text inserted at either their starting or ending point. They can never have a length of 0 and are automatically removed from the buffer if all the text they cover is removed. 即在原文本头或尾追加新文本的样式不受原文本样式影响,原文本高亮,新追加文本不高亮。
Spannable.SPAN_EXCLUSIVE_INCLUSIVE API里面解释:Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand to include text inserted at their ending point but not at their starting point. When 0-length, they behave like points. 即在原文本尾追加新文本的样式受原文本样式影响,原来文本尾高亮,新追加文本也高亮
例子2:
功能:实现在一个TextView里显示了一行字符串,需要这个串里字符显示不同颜色.
代码如下:
第二种方式:
String newMessageInfo = "<font color='red'><b>" + 红色内容 + "</b></font>TextView学习显示不同颜色";
mTextView.setTextView(Html.fromHtml(newMessageInfo));
例子3:
SpannableString ss = new SpannableString( "红色打电话粗体删除线绿色下划线图片:."); ss.setSpan(new ForegroundColorSpan(Color.RED), 0, 2,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new URLSpan("tel:4155551212"), 2, 5,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new StyleSpan(Typeface.BOLD), 5, 7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new StrikethroughSpan(), 7, 10,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new UnderlineSpan(), 10, 16,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new ForegroundColorSpan(Color.GREEN), 10, 15, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); Drawable d = getResources().getDrawable(R.drawable.icon48x48_1); d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight()); ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE); ss.setSpan(span, 18, 19, Spannable.SPAN_INCLUSIVE_EXCLUSIVE); TextView t4 = (TextView) findViewById(R.id.text4); t4.setText(ss); t4.setMovementMethod(LinkMovementMethod.getInstance());
例子4:
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。 效果图: Activity代码: public class TextViewLinkActivity extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myTextView = (TextView) this.findViewById(R.id.myTextView); 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."); sp.setSpan(new URLSpan(""), 5, 7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 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); sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 27, 29, Spannable.SPAN_EXCLUSIVE_INCLUSIVE); //SpannableString对象设置给TextView myTextView.setMovementMethod(LinkMovementMethod.getInstance()); String conValue=“aa”; String sSendTimeValue="bbb" Spannable WordtoSpan = new SpannableString(conValue+"\n"+sSendTimeValue); WordtoSpan.setSpan(new AbsoluteSizeSpan(30), 0, conValue.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); WordtoSpan.setSpan(new AbsoluteSizeSpan(20), conValue.length(), conValue.length()+sSendTimeValue.length()+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); WordtoSpan.setSpan(new ForegroundColorSpan(Color.GRAY), conValue.length(), conValue.length()+sSendTimeValue.length()+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); txtName.setText(WordtoSpan);