使用SpannableString實現字體的各種效果

轉載自：http://blog.csdn.net/jjwwmlp456/article/details/2117466

代碼很簡單，這個代碼可以實現同一行的文本的字體使用不同的樣式，比如有的一行文本String，要使中間的幾個字變成紅色，或者變成斜體，就可以用這樣的代碼

先上代碼，基本與原創沒有太大改動

package com.example.testspanablestring;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;

import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;

import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;


public class SpannableStringActivity extends Activity implements OnClickListener {


private EditText tv;
private Button underline_btn;
private Button strike_btn;
private Button style_btn;
private Button font_btn;
private Button color_btn1;
private Button color_btn2;
private Button url_btn;
private Button image_btn;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_spanable_string);


    tv = (EditText) this.findViewById(R.id.tv);
    underline_btn = (Button) this.findViewById(R.id.underline_btn);
    strike_btn = (Button) this.findViewById(R.id.strike_btn);
    style_btn = (Button) this.findViewById(R.id.style_btn);
    font_btn = (Button) this.findViewById(R.id.font_btn);
    color_btn1 = (Button) this.findViewById(R.id.color_btn1);
    color_btn2 = (Button) this.findViewById(R.id.color_btn2);
    url_btn = (Button) this.findViewById(R.id.url_btn);
    image_btn = (Button) this.findViewById(R.id.image_btn);


    underline_btn.setOnClickListener(this);
    strike_btn.setOnClickListener(this);
    style_btn.setOnClickListener(this);
    font_btn.setOnClickListener(this);
    color_btn1.setOnClickListener(this);
    color_btn2.setOnClickListener(this);
    url_btn.setOnClickListener(this);
    image_btn.setOnClickListener(this);
}


@Override
public void onClick(View v) {
    switch (v.getId()) {
    case R.id.underline_btn:
        addUnderLineSpan();
        break;
    case R.id.strike_btn:
        addStrikeSpan();
        break;
    case R.id.style_btn:
        addStyleSpan();
        break;
    case R.id.font_btn:
        addFontSpan();
        break;
    case R.id.color_btn1:
        addForeColorSpan();
        break;
    case R.id.color_btn2:
        addBackColorSpan();
        break;
    case R.id.url_btn:
        addUrlSpan();
        break;
    case R.id.image_btn:
//        addImageSpan();
        break;
   }
}


/**
* 超鏈接
*/
private void addUrlSpan() {
    SpannableString spanString = new SpannableString("超鏈接");
    URLSpan span = new URLSpan("tel:[phone]");
    spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}


/**
* 文字背景顏色
*/
private void addBackColorSpan() {
    SpannableString spanString = new SpannableString("顏色2");
    BackgroundColorSpan span = new BackgroundColorSpan(Color.YELLOW);
    spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}


/**
* 文字顏色
*/
private void addForeColorSpan() {
    SpannableString spanString = new SpannableString("顏色1");
    ForegroundColorSpan span = new ForegroundColorSpan(Color.BLUE);
    spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}


/**
* 字體大小
*/
private void addFontSpan() {
    SpannableString spanString = new SpannableString("36號字體");
    AbsoluteSizeSpan span = new AbsoluteSizeSpan(36);
    spanString.setSpan(span, 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}


/**
* 粗體，斜體
*/
private void addStyleSpan() {
    SpannableString spanString = new SpannableString("BIBI");
    StyleSpan span = new StyleSpan(Typeface.BOLD_ITALIC);
    spanString.setSpan(span, 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}


/**
* 刪除線
*/
private void addStrikeSpan() {
    SpannableString spanString = new SpannableString("刪除線");
    StrikethroughSpan span = new StrikethroughSpan();
    spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}

/**
* 下劃線
*/
private void addUnderLineSpan() {
    SpannableString spanString = new SpannableString("下劃線");
    UnderlineSpan span = new UnderlineSpan();
    spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    tv.append(spanString);
}

效果圖如下：