最新历史版本 :android--设置TextView部分文字的颜色和背景(高亮显示)

Java代码

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：

复制到剪贴板 Java代码

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);




}



}

参考内容：http://orgcent.com/android-textview-background-color/



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。