生成数据文件直接路径数据存储；excel表格

记录一下，为了以后自己可以更新知识，方便查找

public class TableActivity extends Activity{
private  ArrayList<HashMap<String,String>> printerList;
// 数据库操作类
private UserDao userDao;
//线性布局
private LinearLayout linearLayout1;
//返回按钮
private Button button3;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_table);
// 注册组件
userDao = new UserDao(this);
button3 = (Button) findViewById(R.id.button3);
linearLayout1 = (LinearLayout) findViewById(R.id.linearLayout1);
//求出用户的数量，并且显示
int userSize = userDao.dbGetUserSizeAP();
TextView textView1 = new TextView(this);
textView1.setText("共有" + userSize + "条数据");
textView1.setTextSize(24);
linearLayout1.addView(textView1, 1);//添加的textView1放到activity_table.xml中tag=1的View那个位置
//如果用户数量为0就不用搞这么东西添加表格布局了
if (userSize > 0) {
ArrayList<User> userList = userDao.dbQueryAllAP();//查出表中的所有用户放到一个ArrayList中~~~~~~~~~~~~~~~~~
TableLayout tableLayout1 = new TableLayout(this);//新建一个表格布局
tableLayout1.setStretchAllColumns(true);//自动宽度，使表格在横向占据100%
//打印表头
TableRow tableRow = new TableRow(this);//新建一行
TextView textView = new Tex
4000
tView(this);//新建一个TextView
textView.setTextSize(18);//设置字体
textView.setText("testtype");
tableRow.addView(textView);//放到行中，自动增加一个单元格
textView = new TextView(this);
textView.setTextSize(18);
textView.setText("DP");
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(18);
textView.setText("DT");
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(18);
textView.setText("DTed");
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(18);
textView.setText("DTed");
tableRow.addView(textView);

// 新建的行TableRow添加到表格TableLayout之中
tableLayout1.addView(tableRow, new TableLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.MATCH_PARENT));

ArrayList<HashMap<String,String>> printerList = new ArrayList<HashMap<String, String>>();
//打印用户信息
for (int i = 0; i < userSize; i++) {
User user = userList.get(i);
HashMap<String,String> printerDate = new HashMap<String,String>();
printerDate.put("Testtype",user.getTesttype());
printerDate.put("dt", String.valueOf(user.getDp()));
printerDate.put("dp",String.valueOf(user.getDt()));
printerDate.put("dted",String.valueOf(user.getDped()));
printerDate.put("dped",String.valueOf(user.getDped()));
printerList.add(printerDate);

// 一个用户占据一行
tableRow = new TableRow(this);

textView = new TextView(this);
textView.setTextSize(12);
textView.setText(user.getTesttype());
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(12);
textView.setText(String.valueOf(user.getDp()));
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(12);
textView.setText(String.valueOf(user.getDt()));
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(12);
textView.setText(String.valueOf(user.getDped()));
tableRow.addView(textView);

textView = new TextView(this);
textView.setTextSize(12);
textView.setText(String.valueOf(user.getDted()));
tableRow.addView(textView);

Button button = new Button(this);
button.setText("删除");
button.setTextSize(12);
button.setId(user.getId());//设置按钮的id就是用户的id
button.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View view) {
userDao.dbDeleteUserAP(view.getId());//这样可以获取按钮的id
//修改密码，更新数据库之后，刷新一下这个TableActivity
finish();
Intent intent = new Intent(TableActivity.this,
TableActivity.class);
startActivity(intent);
Toast.makeText(TableActivity.this, "删除成功！",
Toast.LENGTH_SHORT).show();
}
});
tableRow.addView(button);//将这个按钮添加到这行中
// 新建的TableRow添加到TableLayout
tableLayout1.addView(tableRow, new TableLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.MATCH_PARENT));

}
Toast.makeText(TableActivity.this,String.valueOf(printerList),Toast.LENGTH_LONG).show();
String printerDateSave = String.valueOf(printerList);
saveToSDCard("aPenetrometerDate.txt",printerDateSave);
linearLayout1.addView(tableLayout1, 5);//把这个表格放到activity_table.xml中tag=2的View那个位置
}
//返回MainActivity
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
finish();
Intent intent = new Intent(TableActivity.this, MainActivity.class);
startActivity(intent);
}
});

}

public boolean saveToSDCard(String fileName, String content) {
// judge weather the SDCard exits,and can be read and written
if (!Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
return false;
}
FileOutputStream fileOutputStream = null;
File file = new File(Environment.getExternalStorageDirectory(),
fileName);
try {
fileOutputStream = new FileOutputStream(file);
fileOutputStream.write(content.getBytes());
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {

if (fileOutputStream != null) {
fileOutputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return false;
}

// 对物理按钮的监听
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
finish();// 关闭这个Activity。
Intent intent = new Intent(TableActivity.this, MainActivity.class);
startActivity(intent);
break;
}
return super.onKeyDown(keyCode, event);
}

}

//表格工具类

public class ExcelUtil {
//内存地址
public static String root = Environment.getExternalStorageDirectory()
.getPath();

public static void writeExcel(Context context, List<Order> exportOrder,
String fileName) throws Exception {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)&&getAvailableStorage()>1000000) {
Toast.makeText(context, "SD卡不可用", Toast.LENGTH_LONG).show();
return;
}
String[] artTitle = {"沥青针入度实验"};
String[] title = { "订单", "店名", "电话", "地址" };
File file;
File dir = new File(context.getExternalFilesDir(null).getPath());
file = new File(dir, fileName + ".xls");
if (!dir.exists()) {
dir.mkdirs();
}
// 创建Excel工作表
WritableWorkbook wwb=null;
OutputStream os = new FileOutputStream(file);
wwb = Workbook.createWorkbook(os);
// 添加第一个工作表并设置第一个Sheet的名字
WritableSheet sheet = wwb.createSheet("订单", 0);
sheet.getSettings().setShowGridLines(true);
sheet.getSettings().setOrientation(PORTRAIT  );//LANDSCAPE 横向 ； PORTRAIT 纵向
sheet.getSettings().setScaleFactor(200);//收放比例 百分比形式
sheet.getSettings().setFitWidth((short) 1);//页宽
sheet.getSettings().setFitHeight((short) 0);//页高
sheet.getSettings().setPaperSize(PaperSize.A4);//A4规格：21*29.7cm(并非16开)
/*  sheet.getSettings().setTopMargin (HSSFSheet.TopMargin,(short)0.6);//页边距 上下左右
sheet.getSettings().setBottomMargin (0.3);
sheet.getSettings().setLeftMargin (0.5);
sheet.getSettings().setRightMargin (0.5);
sheet.getSettings().setHeaderMargin(0.12);//页眉，页脚
sheet.getSettings().setFooterMargin(0.13);*/
//ws.mergeCells(0, 0, 0, 1);//合并单元格，第一个参数：要合并的单元格最左上角的列号，第二个参数：
// 要合并的单元格最左上角的行号，第三个参数：要合并的单元格最右角的列号，第四个参数：要合并的单元格最右下角的行号，

Label  arttitle = new Label(0,0,artTitle[0],getArtTitle());
sheet.mergeCells(0,0,(title.length-1),1);
sheet.addCell(arttitle);

for (int i = 0; i < title.length; i++) {
Label label;
// Label(x,y,z) 代表单元格的第x+1列，第y+1行, 内容z
// 在Label对象的子对象中指明单元格的位置和内容
label = new Label(i, 2, title[i], getHeader());
// 将定义好的单元格添加到工作表中
sheet.addCell(label);
}
for (int i = 0; i < exportOrder.size(); i++) {
Order order = exportOrder.get(i);
Label orderNum = new Label(0, i + 3, order.id,getBody());
Label restaurant = new Label(1, i + 3, order.restName,getBody());
Label nameLabel = new Label(2,i+3,order.restPhone,getBody());
Label address = new Label(3, i + 3, order.receiverAddr,getBody());
sheet.addCell(orderNum);
sheet.addCell(restaurant);
sheet.addCell(nameLabel);
sheet.addCell(address);
Toast.makeText(context, "写入成功", Toast.LENGTH_LONG).show();
}
// 写入数据
wwb.write();
// 关闭文件
wwb.close();
}

public static WritableCellFormat getArtTitle() {

WritableFont fontArt = new WritableFont(WritableFont.TIMES, 12,
WritableFont.BOLD);// 定义字体

try {
fontArt.setColour(Colour.GREEN);// 蓝色字体
} catch (WriteException e1) {
e1.printStackTrace();
}

WritableCellFormat formatArt = new WritableCellFormat(fontArt);
try {
formatArt.setAlignment(jxl.format.Alignment.CENTRE);// 左右居中
formatArt.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);// 上下居中
formatArt.setBorder(Border.ALL, BorderLineStyle.THIN,
Colour.BLACK);// 黑色边框
formatArt.setBackground(Colour.YELLOW2);// 黄色背景
} catch (WriteException e) {
e.printStackTrace();
}
return formatArt;
}

public static WritableCellFormat getHeader() {

WritableFont font = new WritableFont(WritableFont.TIMES, 10,
WritableFont.BOLD);// 定义字体

try {
font.setColour(Colour.BLUE);// 蓝色字体
} catch (WriteException e1) {
e1.printStackTrace();
}

WritableCellFormat format = new WritableCellFormat(font);
try {
format.setAlignment(jxl.format.Alignment.CENTRE);// 左右居中
format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);// 上下居中
format.setBorder(Border.ALL, BorderLineStyle.THIN,
Colour.BLACK);// 黑色边框
format.setBackground(Colour.YELLOW);// 黄色背景
} catch (WriteException e) {
e.printStackTrace();
}
return format;
}

public static WritableCellFormat getBody() {

WritableFont fontbody = new WritableFont(WritableFont.ARIAL, 6,
WritableFont.BOLD);// 定义字体

try {
fontbody.setColour(Colour.BLUE);// 蓝色字体
} catch (WriteException e1) {
e1.printStackTrace();
}

WritableCellFormat formatbody = new WritableCellFormat(fontbody);
try {
formatbody.setAlignment(jxl.format.Alignment.CENTRE);// 左右居中
formatbody.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);// 上下居中
formatbody.setBorder(Border.ALL, BorderLineStyle.THIN,
Colour.BLACK);// 黑色边框
formatbody.setBackground(Colour.GOLD);// 黄色背景
} catch (WriteException e) {
e.printStackTrace();
}
return formatbody;
}
/** 获取SD可用容量 */
private static long getAvailableStorage() {

StatFs statFs = new StatFs(root);
long blockSize = statFs.getBlockSize();
long availableBlocks = statFs.getAvailableBlocks();
long availableSize = blockSize * availableBlocks;
// Formatter.formatFileSize(context, availableSize);
return availableSize;
}
}

 //读取文件的三种路径：
String printTxtPath = getApplicationContext().getPackageResourcePath() + "/files/" + fileName;
=> /data/app/com.example.fileoperation-2.apk/files/printMenu.txt
String printTxtPath = getApplicationContext().getFilesDir();
String printTxtPath = getApplicationContext().getFilesDir().getAbsolutePath();
=> /data/data/com.example.fileoperation/files

//获取当前程序路径
getApplicationContext().getFilesDir().getAbsolutePath();
//获取该程序的安装包路径
String path=getApplicationContext().getPackageResourcePath();
//获取程序默认数据库路径
getApplicationContext().getDatabasePath(s).getAbsolutePath();

直接调取文件路径不好用，因为要实现可直接操作的，所有这样考虑调取文件管理器