android中SpannableString的使用

1，簡單使用http://blog.csdn.net/harvic880925/article/details/38984705

 

2，例子：

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView tv = (TextView) findViewById(R.id.tv);
        //改變字體顏色
        //先構造SpannableString
        //將這個Span應用於指定范圍的字體
        tv.setText(spanString(20.085));
    }

    private  SpannableString spanString(double price) {
        SpannableString spannableString = new SpannableString(getApplication().getString(R.string.dg_ticket_yuan,
                Units.wrapPrice(price)));
        int priceLength = spannableString.length() - 1;
        //再構造一個改變字體顏色的Span
        spannableString.setSpan(new ForegroundColorSpan(Color.BLUE), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        //再構造一個改變字體大小的Span
        spannableString.setSpan(new AbsoluteSizeSpan(25, true), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        spannableString.setSpan(new AbsoluteSizeSpan(50, true), 1, priceLength, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        spannableString.setSpan(new AbsoluteSizeSpan(25, true), priceLength, spannableString.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        return spannableString;
    }

}

效果：