Android Spannable的使用

最新推荐文章于 2023-02-16 11:02:25 发布

原创最新推荐文章于 2023-02-16 11:02:25 发布 · 885 阅读

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本文介绍如何在Android开发中使用Spannable在TextView中动态设置文本链接和字体颜色，通过设置点击事件实现跳转到指定网页或GitHub仓库，并展示了如何在字符串中插入并配置这些效果。

在Android开发中，有些Text内容需要设置链接或者字体颜色，可通过Spannable在代码中动态设置

TextView tt = (TextView) findViewById(R.id.test);
		tt.setMovementMethod(LinkMovementMethod.getInstance());
		
    	String str = "Demonstration of Volley library announced by Android Team in [Google I/0 2013]. Find the source code [github].Demo uses Flickr REST apis.[Avoid using api key for your usage.]Thanks.";
    	
    	SpannableStringBuilder ssb = new SpannableStringBuilder(str);

    	    int idx1 = str.indexOf("[");
    	    int idx2 = 0;
    	    while (idx1 != -1) {
    	        idx2 = str.indexOf("]", idx1) + 1;

    	        final String clickString = str.substring(idx1, idx2);
    	        
    	        if(clickString.equals("[Google I/0 2013]")) {
        	        ssb.setSpan(new ClickableSpan() {
        	            @Override
        	            public void onClick(View widget) {
        	                Toast.makeText(MainActivity.this, clickString,
        	                        Toast.LENGTH_SHORT).show();

        	            	String url = "http://www.youtube.com/watch?v=yhv8l9F44qo";
        	            	Intent i = new Intent(Intent.ACTION_VIEW);
        	            	i.setData(Uri.parse(url));
        	            	startActivity(i);
        	            }
        	        }, idx1, idx2, 0);

    	        }  
    	        
    	        if (clickString.equals("[github]")) {
        	        ssb.setSpan(new ClickableSpan() {
        	            @Override
        	            public void onClick(View widget) {
        	            	String url = "https://github.com/smanikandan14/Volley-demo";
        	            	Intent i = new Intent(Intent.ACTION_VIEW);
        	            	i.setData(Uri.parse(url));
        	            	startActivity(i);      
        	                Toast.makeText(MainActivity.this, clickString,
        	                        Toast.LENGTH_SHORT).show();

        	            }
        	        }, idx1, idx2, 0);
    	        }
    	        idx1 = str.indexOf("[", idx2);
    	    }

    	tt.setText(ssb, BufferType.SPANNABLE);