SpannableString设置文本背景色

系统管理员 2023-10-10 08:00 4阅读 0赞

参考内容:

http://blog.csdn.net/harvic880925/article/details/38984705

http://blog.it985.com/14433.html

1.使用SpannableString给textview 文本设置背景色

1 public class MainActivity extends AppCompatActivity {
     2 
     3     private TextView tv1;
     4     private TextView tv2;
     5     private int back_color;
     6     private int text_color;
     7 
     8     @Override
     9     protected void onCreate(Bundle savedInstanceState) {
    10         super.onCreate(savedInstanceState);
    11         setContentView(R.layout.activity_main);
    12         initialize();
    13         back_color = ContextCompat.getColor(this,R.color.colorPrimary);
    14         text_color = ContextCompat.getColor(this,R.color.colorAccent);
    15 //        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE，
    16 //        这是在 setSpan 时需要指定的 flag，这几个属性不好理解, 还是直接运行看结果吧
    17 //        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。
    18 //        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括)、
    19 //        Spanned.SPAN_INCLUSIVE_EXCLUSIVE(前面包括，后面不包括)、
    20 //        Spanned.SPAN_EXCLUSIVE_INCLUSIVE(前面不包括，后面包括)、
    21 //        Spanned.SPAN_INCLUSIVE_INCLUSIVE(前后都包括)。
    22         SpannableString sb1 = new SpannableString("好好学习");
    23         SpannableString sb2 = new SpannableString("天天向上");
    24         sb1.setSpan(new BackgroundColorSpan(back_color),0,sb1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    25 
    26         sb2.setSpan(new ForegroundColorSpan(text_color),0,sb2.length(),Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
    27         SpannableStringBuilder ssb = new SpannableStringBuilder();
    28         ssb.append(sb1).append(sb2);
    29         tv1.setText(ssb);
    30     }
    31 
    32     private void initialize() {
    33         tv1 = (TextView) findViewById(R.id.tv1);
    34         tv2 = (TextView) findViewById(R.id.tv2);
    35     }
    36 }

2.运行截图:  
![538831-20160110220552887-1720602448.png][]

3.给textview设置点击事件

public class MainActivity extends AppCompatActivity {
        private TextView tv1;
        private TextView tv2;
        private int back_color;
        private int text_color;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            initialize();
            back_color = ContextCompat.getColor(this,R.color.colorPrimary);
            text_color = ContextCompat.getColor(this,R.color.colorAccent);
            SpannableString sb1 = new SpannableString("好好学习,hello world");
            SpannableString sb2 = new SpannableString("天天向上");
            sb1.setSpan(new BackgroundColorSpan(back_color),0,sb1.length(), Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    
            sb1.setSpan(new ClickableSpan() {
                @Override
                public void onClick(View widget) {
                    Log.e("click","click");
                }
    
                @Override
                public void updateDrawState(TextPaint ds) {
                    super.updateDrawState(ds);
                    ds.setUnderlineText(false);//取消下划线
                    ds.setColor(text_color);
                }
            },4,sb1.length(),Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
    
            tv1.setText(sb1);
            tv1.setMovementMethod(LinkMovementMethod.getInstance());//必须设置,否则没有点击触发
        }
    
        private void initialize() {
            tv1 = (TextView) findViewById(R.id.tv1);
            tv2 = (TextView) findViewById(R.id.tv2);
        }
    }

4.运行效果图  
![538831-20160110222800043-535228334.png][]

点击 ",hello world" 会触发点击事件!

转载于:https://www.cnblogs.com/android-zcq/p/5119702.html

[538831-20160110220552887-1720602448.png]: https://images2015.cnblogs.com/blog/538831/201601/538831-20160110220552887-1720602448.png
[538831-20160110222800043-535228334.png]: https://images2015.cnblogs.com/blog/538831/201601/538831-20160110222800043-535228334.png