SpannableString简介

参考链接：
http://www.cnblogs.com/jisheng/archive/2013/01/10/2854088.html
http://www.jianshu.com/p/d4349a4ca216

package com.lml.activity.spanablestrtest;

import android.content.res.Resources;
import android.graphics.BlurMaskFilter;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.support.v4.content.res.ResourcesCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.method.LinkMovementMethod;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.ClickableSpan;
import android.text.style.DynamicDrawableSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.MaskFilterSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.ScaleXSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.SubscriptSpan;
import android.text.style.SuperscriptSpan;
import android.text.style.TextAppearanceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView tv_show = (TextView)findViewById(R.id.tv_strshow);

        SpannableString spanText = getBackgroundColorSpanStr("BackgroundColor");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getForegroundColorSpanStr("ForegroundColor");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getBlurMaskSpanStr("BlurMask");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getEmbossMaskSpanStr("EmbossMask");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getStrikethroughSpanStr("Strikethrough");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getUnderlineSpanStr("Underline");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getAbsoluteSizeSpanStr("AbsoluteSize");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getDynamicDrawableSpanStr("DynamicDrawable");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getImageSpanStr("Image");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getScaleXSpanStr("ScaleX");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getStyleSpanStr("Style");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getClickableSpanStr("Clickable");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getSubscriptSpanStr("Subscript");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getSuperscriptSpanStr("Superscript");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getURLSpanStr("URLSpanStr");
        tv_show.append(spanText);
        tv_show.append("\n");

        spanText = getTextAppearanceSpanStr("TextAppearance");
        tv_show.append(spanText);

        tv_show.setMovementMethod(LinkMovementMethod.getInstance());

    }

    /**
     * 背景色
     * @param str
     * @return
     */
    private SpannableString getBackgroundColorSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new BackgroundColorSpan(Color.BLUE), 0, spanText.length(),
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 前景色
     * @param str
     * @return
     */
    private SpannableString getForegroundColorSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new ForegroundColorSpan(Color.BLUE), 0, spanText.length(),
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 模糊
     * @param str
     * @return
     */
    private SpannableString getBlurMaskSpanStr(String str) {
        SpannableString spanText = new SpannableString(str);
        MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(3, BlurMaskFilter.Blur.OUTER));
        spanText.setSpan(maskFilterSpan, 0, spanText.length(), Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText;
    }

    /**
     * 浮雕
     * @param str
     * @return
     */
    private SpannableString getEmbossMaskSpanStr(String str) {
        SpannableString spanText = new SpannableString(str);
        //浮雕(EmbossMaskFilter)
        MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new EmbossMaskFilter(new float[]{1,1,3}, 1.5f, 8, 3));
        spanText.setSpan(maskFilterSpan, 0, spanText.length(), Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText;
    }

    /**
     * 光栅
     * @param str
     * @return
     */
    private SpannableString getStrikethroughSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new StrikethroughSpan(), 0, spanText.length(), Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 下划线
     * @param str
     * @return
     */
    private SpannableString getUnderlineSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new UnderlineSpan(), 0, spanText.length(), Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 绝对大小
     * @param str
     * @return
     */
    private SpannableString getAbsoluteSizeSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new AbsoluteSizeSpan(20, true), 0, spanText.length(), Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 动态图
     * @param str
     * @return
     */
    private SpannableString getDynamicDrawableSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        DynamicDrawableSpan drawableSpan = new DynamicDrawableSpan(
                DynamicDrawableSpan.ALIGN_BOTTOM) {
            @Override
            public Drawable getDrawable() {

                Drawable d = ResourcesCompat.getDrawable(getResources(), R.mipmap.ic_launcher, null);
                d.setBounds(0, 0, 50, 50);
                return d;
            }
        };
        spanText.setSpan(drawableSpan, 1, 2, Spannable.
                SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 图片
     * @param str
     * @return
     */
    private SpannableString getImageSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        Drawable d = ResourcesCompat.getDrawable(getResources(), R.mipmap.ic_launcher, null);
        d.setBounds(0, 0, 50, 50);
        spanText.setSpan(new ImageSpan(d), 3, 4, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 缩放
     * @param str
     * @return
     */
    private SpannableString getScaleXSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new ScaleXSpan(3.8f), 2, 4, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 样式
     * @param str
     * @return
     */
    private SpannableString getStyleSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 2, 3,
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 点击
     * @param str
     * @return
     */
    private SpannableString getClickableSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new ClickableSpan() {
                             @Override
                             public void onClick(View widget) {
                                 Toast.makeText(MainActivity.this,"onclick",Toast.LENGTH_SHORT).show();
                             }
                         }, 3, spanText.length(),
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 下标
     * @param str
     * @return
     */
    private SpannableString getSubscriptSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new SubscriptSpan(), 2, 3, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * 上标
     * @param str
     * @return
     */
    private SpannableString getSuperscriptSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new SuperscriptSpan(), 2, 3, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

    /**
     * url
     * @param str
     * @return
     */
    private SpannableString getURLSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new URLSpan("http://www.baidu.com"), 3, spanText.length(),
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }


    /**
     * 文本外貌
     * @param str
     * @return
     */
    private SpannableString getTextAppearanceSpanStr(String str){
        SpannableString spanText = new SpannableString(str);
        spanText.setSpan(new TextAppearanceSpan(this, android.R.style.TextAppearance_Medium),
                2, 3, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
        return spanText ;
    }

}