简单来说，就是直接将字符串转化为html字符，然后让textView显示。

import android.app.Activity;import android.os.Bundle;import android.text.Html;import android.widget.TextView;public class AndroidFronColorTest extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                setContentView(R.layout.main);                TextView text = (TextView)findViewById(R.id.testTextView);                String source = "这只是一个测试，测试下划线、斜体字、红色字的格式";         text.setText(Html.fromHtml(source));    }}

方法二：

import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.text.Html;import android.text.Spannable;import android.text.style.BackgroundColorSpan;import android.text.style.StyleSpan;import android.widget.EditText;import android.widget.TextView;public class AndroidFronColorTest extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                setContentView(R.layout.main);                TextView htmlFormateTextView = (TextView)findViewById(R.id.testTextView);                String source = "这只是一个测试，测试下划线、斜体字、红色字的格式";         htmlFormateTextView.setText(Html.fromHtml(source));                EditText et = (EditText) findViewById(R.id.textView);        Spannable sp = (Spannable) et.getText();        sp.setSpan(new BackgroundColorSpan(Color.RED), 0, 5,        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 6, 11,        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);    }}