本文實例講述了Android開發實現的導出數據庫到Excel表格功能。分享給大家供大家參考，具體如下：
之前一直在電腦上用Excel表格記錄家庭帳單，不久前重裝系統不小心干掉了，傷心了好久，那可是我記了五年的帳單呀！這段時間用的是隨手記，好用但是不太符合我的習慣，所以我自己寫了一個小小的帳單記錄APP，App小到只有一個Activity。當然更多的需求我正在研發中，呵呵！現在已經完成了把每天記錄的數據保存到Sqilte數據庫中，然后可以導出到excel表格。代碼也是借助網上的一些資料寫成的，代碼也比較容易，只需要用到一個jxl.jar包，感謝網友的幫助。
貼上主要代碼，再附上文件包：
MainActivity.java：
package com.ldm.familybill;import java.io.File;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import android.annotation.SuppressLint;import android.app.Activity;import android.content.ContentValues;import android.database.Cursor;import android.os.Bundle;import android.os.Environment;import android.text.TextUtils;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;import com.ldm.db.DBHelper;import com.ldm.excel.ExcelUtils;@SuppressLint("SimpleDateFormat")public class MainActivity extends Activity implements OnClickListener { private EditText mFoodEdt; private EditText mArticlesEdt; private EditText mTrafficEdt; private EditText mTravelEdt; private EditText mClothesEdt; private EditText mDoctorEdt; private EditText mRenQingEdt; private EditText mBabyEdt; private EditText mLiveEdt; private EditText mOtherEdt; private EditText mRemarkEdt; private Button mSaveBtn; private File file; private String[] private String[] saveData; private DBHelper mDbHelper; private ArrayList<ArrayList<String>>bill2List; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewsById(); mDbHelper = new DBHelper(this); mDbHelper.open(); bill2List=new ArrayList<ArrayList<String>>(); } private void findViewsById() { mFoodEdt = (EditText) findViewById(R.id.family_bill_food_edt); mArticlesEdt = (EditText) findViewById(R.id.family_bill_articles_edt); mTrafficEdt = (EditText) findViewById(R.id.family_bill_traffic_edt); mTravelEdt = (EditText) findViewById(R.id.family_bill_travel_edt); mClothesEdt = (EditText) findViewById(R.id.family_bill_clothes_edt); mDoctorEdt = (EditText) findViewById(R.id.family_bill_doctor_edt); mRenQingEdt = (EditText) findViewById(R.id.family_bill_laiwang_edt); mBabyEdt = (EditText) findViewById(R.id.family_bill_baby_edt); mLiveEdt = (EditText) findViewById(R.id.family_bill_live_edt); mOtherEdt = (EditText) findViewById(R.id.family_bill_other_edt); mRemarkEdt = (EditText) findViewById(R.id.family_bill_remark_edt); mSaveBtn = (Button) findViewById(R.id.family_bill_save); mSaveBtn.setOnClickListener(this); } @Override public void onClick(View v) { if (v.getId() == R.id.family_bill_save) { saveData = new String[] { new SimpleDateFormat("yyyy-MM-dd").format(new Date()), mFoodEdt.getText().toString().trim(), mArticlesEdt.getText().toString().trim(), mTrafficEdt.getText().toString().trim(), mTravelEdt.getText().toString().trim(), mClothesEdt.getText().toString().trim(), mDoctorEdt.getText().toString().trim(), mRenQingEdt.getText().toString().trim(), mBabyEdt.getText().toString().trim(), mLiveEdt.getText().toString().trim(), mOtherEdt.getText().toString().trim(), mRemarkEdt.getText().toString().trim() }; if (canSave(saveData)) { ContentValues values = new ContentValues(); values.put("time", new SimpleDateFormat("yyyy-MM-dd").format(new Date())); values.put("food", mFoodEdt.getText().toString()); values.put("use", mArticlesEdt.getText().toString()); values.put("traffic", mTrafficEdt.getText().toString()); values.put("travel", mTravelEdt.getText().toString()); values.put("clothes", mClothesEdt.getText().toString()); values.put("doctor", mDoctorEdt.getText().toString()); values.put("laiwang", mRenQingEdt.getText().toString()); values.put("baby", mBabyEdt.getText().toString()); values.put("live", mLiveEdt.getText().toString()); values.put("other", mOtherEdt.getText().toString()); values.put("remark", mRemarkEdt.getText().toString()); long insert = mDbHelper.insert("family_bill", values); if (insert > 0) { initData(); } } else { Toast.makeText(this, "請填寫任意一項內容", Toast.LENGTH_SHORT).show(); } } } @SuppressLint("SimpleDateFormat") public void initData() { file = new File(getSDPath() + "/Family"); makeDir(file); ExcelUtils.initExcel(file.toString() + "/bill.xls", title); ExcelUtils.writeObjListToExcel(getBillData(), getSDPath() + "/Family/bill.xls", this); } private ArrayList<ArrayList<String>> getBillData() { Cursor mCrusor = mDbHelper.exeSql("select * from family_bill"); while (mCrusor.moveToNext()) { ArrayList<String> beanList=new ArrayList<String>(); beanList.add(mCrusor.getString(1)); beanList.add(mCrusor.getString(2)); beanList.add(mCrusor.getString(3)); beanList.add(mCrusor.getString(4)); beanList.add(mCrusor.getString(5)); beanList.add(mCrusor.getString(6)); beanList.add(mCrusor.getString(7)); beanList.add(mCrusor.getString(8)); beanList.add(mCrusor.getString(9)); beanList.add(mCrusor.getString(10)); beanList.add(mCrusor.getString(11)); beanList.add(mCrusor.getString(12)); bill2List.add(beanList); } mCrusor.close(); return bill2List; } public static void makeDir(File dir) { if (!dir.getParentFile().exists()) { makeDir(dir.getParentFile()); } dir.mkdir(); } public String getSDPath() { File sdDir = null; boolean sdCardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED); if (sdCardExist) { sdDir = Environment.getExternalStorageDirectory(); } String dir = sdDir.toString(); return dir; } private boolean canSave(String[] data) { boolean isOk = false; for (int i = 0; i < data.length; i++) { if (i > 0 && i < data.length) { if (!TextUtils.isEmpty(data[i])) { isOk = true; } } } return isOk; }}CreateExcel.java：
package com.ldm.excel;import java.io.File;import jxl.Workbook;import jxl.write.Label;import jxl.write.WritableSheet;import jxl.write.WritableWorkbook;import android.os.Environment;public class CreateExcel { // 準備設置excel工作表的標題 private WritableSheet sheet; /**創建Excel工作薄*/ private WritableWorkbook wwb; private String[] public CreateExcel() { excelCreate(); } public void excelCreate() { try { /**輸出的excel文件的路徑*/ String filePath = Environment.getExternalStorageDirectory() + "/family_bill"; File file = new File(filePath, "bill.xls"); if (!file.exists()) { file.createNewFile(); } wwb = Workbook.createWorkbook(file); /**添加第一個工作表并設置第一個Sheet的名字*/ sheet = wwb.createSheet("家庭帳務表", 0); } catch (Exception e) { e.printStackTrace(); } } public void saveDataToExcel(int index, String[] content) throws Exception { Label label; for (int i = 0; i < title.length; i++) { /**Label(x,y,z)其中x代表單元格的第x+1列，第y+1行, 單元格的內容是y * 在Label對象的子對象中指明單元格的位置和內容 * */ label = new Label(i, 0, title[i]); /**將定義好的單元格添加到工作表中*/ sheet.addCell(label); } /* * 把數據填充到單元格中 * 需要使用jxl.write.Number * 路徑必須使用其完整路徑，否則會出現錯誤 */ for (int i = 0; i < title.length; i++) { Label labeli = new Label(i, index, content[i]); sheet.addCell(labeli); } // 寫入數據 wwb.write(); // 關閉文件 wwb.close(); }}DBHelper.java：
package com.ldm.db;import android.content.ContentValues;import android.content.Context;import android.database.Cursor;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteDatabase.CursorFactory;import android.database.sqlite.SQLiteOpenHelper;public class DBHelper extends SQLiteOpenHelper { public static final String DB_NAME = "ldm_family"; // DB name private Context mcontext; private DBHelper mDbHelper; private SQLiteDatabase db; public DBHelper(Context context) { super(context, DB_NAME, null, 11); this.mcontext = context; } public DBHelper(Context context, String name, CursorFactory factory, int version) { super(context, name, factory, version); } /** * 用戶第一次使用軟件時調用的操作，用于獲取數據庫創建語句（SW）,然后創建數據庫 */ @Override public void onCreate(SQLiteDatabase db) { String sql = "create table if not exists family_bill(id integer primary key,time text,food text,use text,traffic text,travel text,clothes text,doctor text,laiwang text,baby text,live text,other text,remark text)"; db.execSQL(sql); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } /* 打開數據庫,如果已經打開就使用，否則創建 */ public DBHelper open() { if (null == mDbHelper) { mDbHelper = new DBHelper(mcontext); } db = mDbHelper.getWritableDatabase(); return this; } /* 關閉數據庫 */ public void close() { db.close(); mDbHelper.close(); } /**添加數據 */ public long insert(String tableName, ContentValues values) { return db.insert(tableName, null, values); } /**查詢數據*/ public Cursor findList(String tableName, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy, String limit) { return db.query(tableName, columns, selection, selectionArgs, groupBy, having, orderBy, limit); } public Cursor exeSql(String sql) { return db.rawQuery(sql, null); }}ExcelUtils.java：
package com.ldm.excel;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.List;import jxl.Workbook;import jxl.WorkbookSettings;import jxl.write.Label;import jxl.write.WritableCell;import jxl.write.WritableCellFormat;import jxl.write.WritableFont;import jxl.write.WritableSheet;import jxl.write.WritableWorkbook;import jxl.write.WriteException;import android.content.Context;import android.widget.Toast;public class ExcelUtils { 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(); } } public static void initExcel(String fileName, String[] colName) { format(); WritableWorkbook workbook = null; try { File file = new File(fileName); if (!file.exists()) { file.createNewFile(); } workbook = Workbook.createWorkbook(file); WritableSheet sheet = workbook.createSheet("家庭帳務表", 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(); } } } } @SuppressWarnings("unchecked") public static <T> void writeObjListToExcel(List<T> objList, String fileName, Context c) { if (objList != null && objList.size() > 0) { WritableWorkbook writebook = null; InputStream in = null; try { WorkbookSettings setEncode = new WorkbookSettings(); setEncode.setEncoding(UTF8_ENCODING); in = new FileInputStream(new File(fileName)); Workbook workbook = Workbook.getWorkbook(in); writebook = Workbook.createWorkbook(new File(fileName), workbook); WritableSheet sheet = writebook.getSheet(0); 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)); } } 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(); } } } } } 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; }}附：完整源碼點擊此處本站下載。
希望本文所述對大家Android程序設計有所幫助。
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