设置TextView部分文字的颜色和背景(高亮显示)

参考了zhangkun716717-126-com的博客例子， 然后拿来修改了， 这个例子在我的开发中用到了，首先感谢“亚当爱上java”的无私分享让我得到了结果，下面看我改过的代码

public class Test extends Activity {
	private String strs="我的心太乱ewrwer了，给我点空白。";  
    private TextView textview;  
    private Button btn1, btn2;
    private SpannableStringBuilder style;
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        
        loadView();  
    }  
    private void loadView(){
    	btn1 = (Button) findViewById(R.id.btn1);
    	btn2 = (Button) findViewById(R.id.btn2);
    	textview = (TextView) findViewById(R.id.tv);
    	style=new SpannableStringBuilder(strs);  
    	btn1.setText("蓝色");
    	btn2.setText("红色");
        btn1.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
		        style.setSpan(new BackgroundColorSpan(Color.BLUE),0,strs.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
		        textview.setText(style);  
			}
		});
        btn2.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
		        style.setSpan(new BackgroundColorSpan(Color.RED),0,strs.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  
		        textview.setText(style);  
			}
		});
    }
}