这是一些使其工作的代码
private void importDB() { try { File sd = Environment.getExternalStorageDirectory(); File data = Environment.getDataDirectory(); if (sd.canWrite()) { String currentDBPath = "//data//" + "<package name>" + "//databases//" + "<database name>"; String backupDBPath = "<backup db filename>"; // From SD directory. File backupDB = new File(data, currentDBPath); File currentDB = new File(sd, backupDBPath); FileChannel src = new FileInputStream(backupDB).getChannel(); FileChannel dst = new FileOutputStream(currentDB).getChannel(); dst.transferFrom(src, 0, src.size()); src.close(); dst.close(); Toast.makeText(getApplicationContext(), "import Successful!", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { Toast.makeText(getApplicationContext(), "import Failed!", Toast.LENGTH_SHORT) .show(); }}private void exportDB() { try { File sd = Environment.getExternalStorageDirectory(); File data = Environment.getDataDirectory(); if (sd.canWrite()) { String currentDBPath = "//data//" + "<package name>" + "//databases//" + "<db name>"; String backupDBPath = "<destination>"; File currentDB = new File(data, currentDBPath); File backupDB = new File(sd, backupDBPath); FileChannel src = new FileInputStream(currentDB).getChannel(); FileChannel dst = new FileOutputStream(backupDB).getChannel(); dst.transferFrom(src, 0, src.size()); src.close(); dst.close(); Toast.makeText(getApplicationContext(), "Backup Successful!", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { Toast.makeText(getApplicationContext(), "Backup Failed!", Toast.LENGTH_SHORT) .show(); }}
