公司项目需要在安卓中显示表格并将表格数据以excel格式导出，表格可以自己定义，最开始想的是使用listView或者recycleView来实现，但是感觉灵活性太差，于是乎就去万能的Github上寻找资源，找了找感觉smartTable写的很好，功能强大且符合需求，好了，开始干活：
显示表格数据
1、添加 JitPack repository 到你的build文件
allprojects {
repositories {
...
maven { url 'https://www.jitpack.io' }
}
}2、添加依赖
dependencies {
//生成表格显示
implementation 'com.github.huangyanbin:SmartTable:1.7.1'
}3、在布局文件中使用
<com.bin.david.form.core.SmartTable
android:id="@+id/materialSmartTable"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"/>4、smartTable中向表格中导入数据有多种选择，最简单的即为注解导入:
a、在实体类的类名上面添加注解，括号中为要显示的表格的名称：
@SmartTable(name="物料清单")
public class BomBean {
}b、在需要显示的字段上添加注解：
// id为该字段所在表格排序位置
@SmartColumn(id =1,name = "列名")
//如果需要查询到该成员变量里面去，通过设置type实现
@SmartColumn(type = ColumnType.Child)c、设置表格数据：
materialSmartTable = view.findViewById(R.id.materialSmartTable);
materialSmartTable.setData(bomBeanresult);//数据类型为List导出Excel数据
1、首先还是需要添加依赖：
//导出excel
implementation group: 'net.sourceforge.jexcelapi', name: 'jxl', version: '2.6.12'2、写一个工具类，用来实现导出Excel文件：
/**
* @author jiang zhu on 2019/4/14
*/
public class ExcelUtil {
public static WritableFont arial14font = null;
public static WritableCellFormat arial14format = null;
public static WritableFont arial10font = null;
public static WritableCellFormat arial10format = null;
public static WritableFont arial12font = null;
public static WritableCellFormat arial12format = null;
public final static String UTF8_ENCODING = "UTF-8";
public final static String GBK_ENCODING = "GBK";
public static void format() {
try {
arial14font = new WritableFont(WritableFont.ARIAL, 14, WritableFont.BOLD);
arial14font.setColour(jxl.format.Colour.LIGHT_BLUE);
arial14format = new WritableCellFormat(arial14font);
arial14format.setAlignment(jxl.format.Alignment.CENTRE);
arial14format.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN);
arial14format.setBackground(jxl.format.Colour.VERY_LIGHT_YELLOW);
arial10font = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);
arial10format = new WritableCellFormat(arial10font);
arial10format.setAlignment(jxl.format.Alignment.CENTRE);
arial10format.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN);
arial10format.setBackground(jxl.format.Colour.LIGHT_BLUE);
arial12font = new WritableFont(WritableFont.ARIAL, 12);
arial12format = new WritableCellFormat(arial12font);
arial12format.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN);
}
catch (WriteException e) {
e.printStackTrace();
}
}
/**
* 初始化
* @param fileName 文件名称
* @param colName 需要导出的列名
*/
public static void initExcel(String fileName, String[] colName) {
format();
WritableWorkbook workbook = null;
try {
File file = new File(fileName);
if (!file.exists()) {
file.delete();
file.createNewFile();
}
workbook = Workbook.createWorkbook(file);
WritableSheet sheet = workbook.createSheet("物料清单", 0);
sheet.addCell((WritableCell) new Label(0, 0, fileName, arial14format));
for (int col = 0; col < colName.length; col++) {
sheet.addCell(new Label(col, 0, colName[col], arial10format));
}
workbook.write();
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (workbook != null) {
try {
workbook.close();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
/**
* 写出excel文件
* @param objList 数据源
* @param fileName 文件名称
* @param c 上下文
* @param <T> 数据类型
* @return 写出的Excel文件
*/
@SuppressWarnings("unchecked")
public static <T> File writeObjListToExcel(List<T> objList, String fileName, Context c) {
File file = null;
if (objList != null && objList.size() > 0) {
WritableWorkbook writebook = null;
InputStream in = null;
file = new File(fileName);
if (!file.exists()) {
try {
file.delete();
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
WorkbookSettings setEncode = new WorkbookSettings();
setEncode.setEncoding(UTF8_ENCODING);
in = new FileInputStream(file);
Workbook workbook = Workbook.getWorkbook(in);
writebook = Workbook.createWorkbook(new File(fileName), workbook);
WritableSheet sheet = null;
try {
sheet = writebook.getSheet(0);
} catch (IndexOutOfBoundsException e) {
e.printStackTrace();
}
for (int j = 0; j < objList.size(); j++) {
/*ArrayList<String> list=(ArrayList<String>) objList.get(j);
for (int i = 0; i < list.size(); i++) {
sheet.addCell(new Label(i, j+1, list.get(i), arial12format));
}*/
BomBean projectBean = (BomBean) objList.get(j);
List<String> list = new ArrayList<>();
list.add(projectBean.getMaterialCodeERP());
list.add(projectBean.getMaterialName());
list.add(projectBean.getSpec());
list.add(projectBean.getERPUnit());
list.add(projectBean.getNum());
list.add(projectBean.getTechnicalProtocol());
list.add(projectBean.getBomType());
for (int i = 0; i < list.size(); i++) {
sheet.addCell(new Label(i, j + 1, list.get(i), arial12format));
if (list.get(i).length() <= 4) {
//设置列宽
sheet.setColumnView(i, list.get(i).length() + 8);
} else {
//设置列宽
sheet.setColumnView(i, list.get(i).length() + 5);
}
}
//设置行高
sheet.setRowView(j + 1, 350);
}
writebook.write();
//Toast.makeText(c, "保存成功", Toast.LENGTH_SHORT).show();
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (writebook != null) {
try {
writebook.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
if (in != null) {
try {
in.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
}
return file;
}
public static Object getValueByRef(Class cls, String fieldName) {
Object value = null;
fieldName = fieldName.replaceFirst(fieldName.substring(0, 1), fieldName.substring(0, 1).toUpperCase());
String getMethodName = "get" + fieldName;
try {
Method method = cls.getMethod(getMethodName);
value = method.invoke(cls);
}
catch (Exception e) {
e.printStackTrace();
}
return value;
}
}
3、实现导出Excel：
String filePath = Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/bhne/";
File files = new File(filePath);
if (!files.exists()) {
files.mkdirs();
}
String[] title = {"物料编码", "物料名称", "物料规格信号", "单位", "物料计算数量", "物料计数协议", "物料类型"};
String excelFileName = "/" + excelName + ".xls";
String resultPath = files.getAbsolutePath() + excelFileName;
Log.e("rultPath", resultPath);
ExcelUtil.initExcel(resultPath, title);
File moudleFile = ExcelUtil.writeObjListToExcel(bomBeanresult, resultPath, context);
if (moudleFile != null) {
ToastUtils.showShort("已经保存到本地" + filePath);
}
基本就这样，剩下的就是逻辑代码了。这是实现demo
