如何在excel中插入图片

最近项目中需要用到在excel中插入图片的功能。百度了好久，终于找到了。感谢某位大佬，比较懒，就不贴谁了。直接上代码：

首先下载jxl.jar，这个网上有。

1、布局代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/createExcel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="createExcel"/>
    <Button
        android:id="@+id/readExcel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="readExcel"/>
    <Button
        android:id="@+id/updateExcel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="updateExcel"/>
    <Button
        android:id="@+id/writeExcel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="writeExcel"/>
</LinearLayout>

2、MainActivity代码：

package com.example.administrator.myexceldemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableCell;
import jxl.write.WritableImage;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    String path = "mnt/sdcard/test.xls";

    private Button createExcel;
    private Button readExcel;
    private Button updateExcel;
    private Button writeExcel;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        mOnClickListener();
    }

    private void initView() {
        createExcel = (Button) findViewById(R.id.createExcel);
        readExcel = (Button) findViewById(R.id.readExcel);
        updateExcel = (Button) findViewById(R.id.updateExcel);
        writeExcel = (Button) findViewById(R.id.writeExcel);
    }

    private void mOnClickListener() {
        createExcel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                createExcel();
            }
        });
        readExcel.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                readExcel();
            }
        });
        updateExcel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                updateExcel(path);
            }
        });
        writeExcel.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                writeExcel(path);
            }
        });
    }

    public void readExcel() {
        try {
            InputStream is = new FileInputStream("mnt/sdcard/test.xls");
            Workbook book = Workbook
                    .getWorkbook(new File("mnt/sdcard/test.xls"));
            book.getNumberOfSheets();
            // 获得第一个工作表对象
            Sheet sheet = book.getSheet(0);
            int Rows = sheet.getRows();
            int Cols = sheet.getColumns();
            System.out.println("当前工作表的名字:" + sheet.getName());
            System.out.println("总行数:" + Rows);
            System.out.println("总列数:" + Cols);
            // 得到第一列第一行的单元格
            Cell cell1 = sheet.getCell(0, 0);
            String result = cell1.getContents();
            System.out.println(result);
            book.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public void createExcel() {
        try {
            // 创建或打开Excel文件，并插入数据
            WritableWorkbook book = Workbook.createWorkbook(new File("mnt/sdcard/test.xls"));

            // 生成工作表,参数0表示这是第一页
            WritableSheet sheet1 = book.createSheet("第一页", 0);
            WritableSheet sheet2 = book.createSheet("第三页", 2);

            // 在Label对象的构造函数中,元格位置是第一列第一行(0,0)以及单元格内容为test
            Label label = new Label(0, 0, "test");

            // 将定义好的单元格添加到工作表中
            sheet1.addCell(label);

          /*
          * 生成一个保存数字的单元格.必须使用Number的完整包路径,否则有语法歧义
          */
            jxl.write.Number number = new jxl.write.Number(1, 0, 555.12541);
            sheet2.addCell(number);

            // 写入数据并关闭文件
            book.write();
            book.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    /**
     * jxl暂时不提供修改已经存在的数据表,这里通过一个小办法来达到这个目的,不适合大型数据更新! 这里是通过覆盖原文件来更新的.
     *
     * @param filePath
     */
    public void updateExcel(String filePath) {
        try {
            Workbook rwb = Workbook.getWorkbook(new File(filePath));
            WritableWorkbook wwb = Workbook.createWorkbook(new File(
                    "d:/new.xls"), rwb);// copy
            WritableSheet ws = wwb.getSheet(0);
            WritableCell wc = ws.getWritableCell(0, 0);
            // 判断单元格的类型,做出相应的转换
            Label label = (Label) wc;
            label.setString("更改");
            wwb.write();
            wwb.close();
            rwb.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void writeExcel(String filePath) {
        try {
            // 创建工作薄
            WritableWorkbook wwb = Workbook.createWorkbook(new File(filePath));
            // 创建工作表
            WritableSheet ws = wwb.createSheet("Sheet1", 0);

            // 添加图片(注意此处jxl暂时只支持png格式的图片)
            // 0,1分别代表x,y 2,5代表宽和高占的单元格数
            ws.addImage(new WritableImage(5, 5, 2, 5, new File(
                    "/storage/emulated/0/Tencent/QQ_Images/-1a12814ec0ba85d6.png")));
            wwb.write();
            wwb.close();
        } catch (Exception e) {
            System.out.println(e.toString());
        }
    }
}

代码很简单，有需要的自行复制。