/**
* 導出數據庫
*
* @param title
* @return
*/
public void exportDb(String title) {
String result[][] = null;
// 導出
SQLiteDatabase localSQLiteDatabase = this.dbhelper
.getWritableDatabase();//
Cursor cursor = localSQLiteDatabase
.rawQuery(
"select noveldetails_detailsid,noveldetails_statrt,"
+ " noveldetails_pagination,front.novelproperty_pagination from seed,front"
+ " where seed.novelproperty_propertyid=front.novelproperty_propertyid and "
+ "front.novelproperty_title =? order by noveldetails_statrt asc",
new String[] { title });
boolean sdCardExist = Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED); // 判斷sd卡是否存在
if (sdCardExist) {
String baseDir = Environment.getExternalStorageDirectory()
.getAbsolutePath();// 獲取SD卡目錄
File file = new File(baseDir + "//" + title + ".txt");
if (!file.getParentFile().exists()) {// 判斷是否存在,沒創建文件夾
file.getParentFile().mkdirs();
// 如:在f盤創建/TXT文件夾/testTXT/兩個文件夾。
}
if (!file.exists()) {
try {
file.createNewFile();// 創建txt文件 如:testData.txt文件
} catch (IOException e) {
e.printStackTrace();
}
}
FileWriter fileWriter;
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(
new FileOutputStream(file), "UTF-8");
// fileWriter = new FileWriter(file, true);
BufferedWriter bf = new BufferedWriter(outputStreamWriter);
cursor.moveToNext();
result = new String[cursor.getCount()][];
for (int r = 0; r < cursor.getCount(); r++) {
result[r] = new String[cursor.getColumnCount()];
}
for (int r = 0; r < cursor.getCount(); r++) {
for (int c = 0; c < cursor.getColumnCount(); c++) {
result[r][c] = cursor.getString(c);
}
cursor.moveToNext();
}
cursor.close();
for (String[] str : result) {
for (String strFile : str) {
bf.write(strFile);
bf.flush();
}
bf.write("\n"); // 寫入換行
}
bf.close();
} catch (IOException e) {
e.printStackTrace();
}
//
}
cursor.close();
localSQLiteDatabase.close();
}
從SQLite數據庫導出txt文本文檔
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