Text String 變色

Text String 變色。

public class TextViewActivity extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        

        TextView tv = new TextView (this);

        String string = "Ilovemydog"; //10 letters

        SpannableStringBuilder fontStyleBuilder = new SpannableStringBuilder(string);

        fontStyleBuilder.setSpan(new ForegroundColorSpan(Color.BLUE), 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //1-0 = 1 letter-> I

        fontStyleBuilder.setSpan(new ForegroundColorSpan(Color.RED), 1, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//5-1 = 4 letters-> love

        fontStyleBuilder.setSpan(new ForegroundColorSpan(Color.GREEN), 5, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//7-5 = 2 letters -> my

        fontStyleBuilder.setSpan(new ForegroundColorSpan(Color.YELLOW), 7, 10, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//10-7 = 3 letters -> dog

        tv.setText(fontStyleBuilder);

        tv.setTextSize(24);

        setContentView(tv);

    }

}