android--设置TextView部分文字的颜色和背景(高亮显示)

来源：互联网发布：qsv格式转换 mac 编辑：程序博客网时间：2024/05/22 06:15

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);              textview.setText(style);                        }           }

同时设置文字和背景高亮显示：

package com.justel.contact;           import android.app.Activity;      import android.graphics.Color;      import android.os.Bundle;      import android.text.Spannable;      import android.text.SpannableStringBuilder;      import android.text.style.BackgroundColorSpan;      import android.text.style.ForegroundColorSpan;      import android.widget.TextView;           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);              style.setSpan(new ForegroundColorSpan(Color.RED),7,9,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);              textview.setText(style);                        }           }

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。