SD 카드 또는 이와 유사한 태그에서 기존 .db 파일을 복사하는 방법은 무엇입니까? 희망이 시나리오
을 위해 작동 할
private void importDBFile(File importDB) {
String dataDir = Environment.getDataDirectory().getPath();
String packageName = getPackageName();
File importDir = new File(dataDir + "/data/" + packageName + "/databases/");
if (!importDir.exists()) {
Toast.makeText(this, "There was a problem importing the Database", Toast.LENGTH_SHORT).show();
return;
}
File importFile = new File(importDir.getPath() + "/" + importDB.getName());
try {
importFile.createNewFile();
copyDB(importDB, importFile);
Toast.makeText(this, "Import Successful", Toast.LENGTH_SHORT).show();
} catch (IOException ex) {
Toast.makeText(this, "There was a problem importing the Database", Toast.LENGTH_SHORT).show();
}
}
private void copyDB(File from, File to) throws IOException {
FileChannel inChannel = new FileInputStream(from).getChannel();
FileChannel outChannel = new FileOutputStream(to).getChannel();
try {
inChannel.transferTo(0, inChannel.size(), outChannel);
} finally {
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
}
}
:이 당신을 위해이 작업을 수행하는 코드의 빠른 조각