SPAN 的使用详解

来源：互联网发布：r语言的图和python 编辑：程序博客网时间：2024/06/07 03:17

package com.example.spantext;import android.app.Activity;import android.graphics.BlurMaskFilter;import android.graphics.BlurMaskFilter.Blur;import android.graphics.Color;import android.graphics.EmbossMaskFilter;import android.graphics.Typeface;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.text.Spannable;import android.text.SpannableString;import android.text.SpannableStringBuilder;import android.text.Spanned;import android.text.method.LinkMovementMethod;import android.text.style.AbsoluteSizeSpan;import android.text.style.BackgroundColorSpan;import android.text.style.ForegroundColorSpan;import android.text.style.ImageSpan;import android.text.style.MaskFilterSpan;import android.text.style.StrikethroughSpan;import android.text.style.StyleSpan;import android.text.style.URLSpan;import android.text.style.UnderlineSpan;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity implements OnClickListener {    private TextView 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;    private Button maskfilte_btn;    private Button Rasterizer_btn;    private Button spannablestringbuilder;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv = (TextView) 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);        maskfilte_btn = (Button) this.findViewById(R.id.maskfilte_btn);        Rasterizer_btn = (Button) this.findViewById(R.id.Rasterizer_btn);        spannablestringbuilder = (Button) this.findViewById(R.id.spannablestringbuilder);         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);        maskfilte_btn.setOnClickListener(this);        Rasterizer_btn.setOnClickListener(this);        spannablestringbuilder.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;        case R.id.maskfilte_btn:            addmaskfilteSpan();            break;        case R.id.Rasterizer_btn:            addRasterizerSpan();            break;        case R.id.spannablestringbuilder:            addspannablestringbuilderSpan();            break;        }    }    /**     * spannablestringbuilder     */    private void addspannablestringbuilderSpan() {        SpannableStringBuilder ss=new SpannableStringBuilder("红色超链接斜体删除线绿色下划线图片:.");            //用颜色标记文本        ss.setSpan(new ForegroundColorSpan(Color.RED), 0, 2,                 //setSpan时需要指定的 flag,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括).                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //用超链接标记文本        ss.setSpan(new URLSpan("tel:4155551212"), 2, 5,                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //用样式标记文本（斜体）        ss.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 5, 7,                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //用删除线标记文本        ss.setSpan(new StrikethroughSpan(), 7, 10,                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //用下划线标记文本        ss.setSpan(new UnderlineSpan(), 10, 16,                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //用颜色标记        ss.setSpan(new ForegroundColorSpan(Color.GREEN), 10, 12,                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);        //获取Drawable资源        Drawable d = getResources().getDrawable(R.drawable.ic_launcher);         d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());        //创建ImageSpan        ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);        //用ImageSpan替换文本        ss.setSpan(span, 18, 19, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);         tv.append("\n");        tv.setText(ss);        tv.setMovementMethod(LinkMovementMethod.getInstance()); //实现文本的滚动     }     /*     * Spannable.SPAN_EXCLUSIVE_EXCLUSIVE：前后都不包括，即在指定范围的前面和后面插入新字符都不会应用新样式     * Spannable.SPAN_EXCLUSIVE_INCLUSIVE ：前面不包括，后面包括。即仅在范围字符的后面插入新字符时会应用新样式     * Spannable.SPAN_INCLUSIVE_EXCLUSIVE ：前面包括，后面不包括。     * Spannable.SPAN_INCLUSIVE_INCLUSIVE ：前后都包括。     */    /**     * 光栅效果     */    private void addRasterizerSpan() {        SpannableString spanText = new SpannableString("StrikethroughSpan");        spanText.setSpan(new StrikethroughSpan(), 0, 7, Spannable.        SPAN_INCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanText);             }    /**     * 修饰效果     */    private void addmaskfilteSpan() {        SpannableString spanText = new SpannableString("benzlocke6666666");        int length = spanText.length();        //模糊(BlurMaskFilter)        MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(3, Blur.OUTER));        spanText.setSpan(maskFilterSpan, 0, length - 10, Spannable.        SPAN_INCLUSIVE_EXCLUSIVE);        //浮雕(EmbossMaskFilter)        maskFilterSpan = new MaskFilterSpan(new EmbossMaskFilter(new float[]{1,1,3}, 1.5f, 8, 3));        spanText.setSpan(maskFilterSpan, length - 10, length, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanText);             }     /**     * 超链接     */    private void addUrlSpan() {        SpannableString spanString = new SpannableString("超链接");        URLSpan span = new URLSpan("tel:0123456789");        spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);                 tv.setMovementMethod(LinkMovementMethod.getInstance());    }     /**     * 文字背景颜色     */    private void addBackColorSpan() {        SpannableString spanString = new SpannableString("文字背景颜色");        BackgroundColorSpan span = new BackgroundColorSpan(Color.YELLOW);        spanString.setSpan(span, 0, 6, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 文字颜色     */    private void addForeColorSpan() {        SpannableString spanString = new SpannableString("文字颜色");        ForegroundColorSpan span = new ForegroundColorSpan(Color.BLUE);        spanString.setSpan(span, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 字体大小     */    private void addFontSpan() {        SpannableString spanString = new SpannableString("36号字体");        AbsoluteSizeSpan span = new AbsoluteSizeSpan(36);        spanString.setSpan(span, 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 粗体，斜体     */    private void addStyleSpan() {        SpannableString spanString = new SpannableString("ABCDEF");        StyleSpan span = new StyleSpan(Typeface.BOLD_ITALIC);        spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 删除线     */    private void addStrikeSpan() {        SpannableString spanString = new SpannableString("删除线");        StrikethroughSpan span = new StrikethroughSpan();        spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 下划线     */    private void addUnderLineSpan() {        SpannableString spanString = new SpannableString("下划线");        UnderlineSpan span = new UnderlineSpan();        spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);        tv.append("\n");        tv.append(spanString);    }     /**     * 图片     */    private void addImageSpan() {        SpannableString spanString = new SpannableString(" ");        Drawable d = getResources().getDrawable(R.drawable.ic_launcher);        d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());        ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);        spanString.setSpan(span, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      //  tv.append("\n");        tv.append(spanString);                tv.append("liaoli");    }}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.spantext.MainActivity" >    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"        android:text=" " />    <ScrollView        android:layout_width="wrap_content"        android:layout_height="wrap_content" >        <LinearLayout            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:orientation="vertical" >            <Button                android:id="@+id/underline_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="underline_btn" />            <Button                android:id="@+id/strike_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="strike_btn" />            <Button                android:id="@+id/style_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text=" style_btn" />            <Button                android:id="@+id/font_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="font_btn" />            <Button                android:id="@+id/color_btn1"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="color_btn1 " />            <Button                android:id="@+id/color_btn2"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text=" color_btn2" />            <Button                android:id="@+id/url_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="url_btn" />            <Button                android:id="@+id/image_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="image_btn" />            <Button                android:id="@+id/maskfilte_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="maskfilte_btn" />            <Button                android:id="@+id/Rasterizer_btn"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Rasterizer_btn" />            <Button                android:id="@+id/spannablestringbuilder"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="spannablestringbuilder" />        </LinearLayout>    </ScrollView></LinearLayout>

效果：

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