Develop Reference

Restore Realm DB from SD Card/External Storage Android

I have a situation where i prompt user whether to backup their messages or no with the google backup service. I am successfully backing up the current realm database onto the SD card from where the backup to google service will happen.
But yet i though about the scenario where i want to actually restore the database from SD card to the current Realm Instance,meaning replace the current realm file with the one which is available on the SD Card.
In the older versions i saw that Realm gave a way to specify a custom path from which realm would read the database file,but in this new one i see none of it.
Any help please?

CREATE BACKUP FILE
public void backup() {
try {
// create a backup file
File exportRealmFile;
exportRealmFile = new File(EXPORT_REALM_PATH, EXPORT_REALM_FILE_NAME);
// if backup file already exists, delete it
exportRealmFile.delete();
// copy current realm to backup file
realm.writeCopyTo(exportRealmFile);
} catch (IOException e) {
e.printStackTrace();
}
realm.close();
}
RESTORE
private String copyBundledRealmFile(String oldFilePath, String outFileName) {
try {
File file = new File(activity.getApplicationContext().getFilesDir(), outFileName);
FileOutputStream outputStream = new FileOutputStream(file);
FileInputStream inputStream = new FileInputStream(new File(oldFilePath));
byte[] buf = new byte[1024];
int bytesRead;
while ((bytesRead = inputStream.read(buf)) > 0) {
outputStream.write(buf, 0, bytesRead);
}
outputStream.close();
return file.getAbsolutePath();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
Hope this help.
Credit to link

How to pull database from android mobile in MAC?

I am developing an android app. I have tested the app in mobile and now i need to see the database of my app(i.e mobile database). I am using Mac and confused how to pull the database from the mobile and see it in SQLite browser.
Thanks for your help guys.

You won't be able to on a real device (unless it is rooted). The data directories are protected against access by anything other than the owning app.
To get it off of the device you need to set up a method in your app to copy the database to somewhere that is accessible (like an SD card). Following is code I've used to do that before:
public void backup() {
try {
File sdcard = Environment.getExternalStorageDirectory();
File outputFile = new File(sdcard,
"yourDB.bak");
if (!outputFile.exists())
outputFile.createNewFile();
File data = Environment.getDataDirectory();
File inputFile = new File(data,
"data/your.package.name/databases/yourDB");
InputStream input = new FileInputStream(inputFile);
OutputStream output = new FileOutputStream(outputFile);
byte[] buffer = new byte[1024];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
output.flush();
output.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
throw new Error("Copying Failed");
}
}

Accessible SQLiteDatabase on Android Phone

I'm currently writing a phonebook-type application for the Android OS. I'm currently using a SQLiteDatabase to hold my contact information. I know that the database is held in
data/data/package-name/databases
However, I'd need root access to be able to find that directory on an Android phone. Is there a way to put the database somewhere I can find it without having to root the phone?

Just copy your DB to SD card programatically.
This code is an example how to access your DB =)
try {
input = new FileInputStream("/data/data/my_package_name/databases/" + DATABASE_NAME);
File dir = new File("/sdcard/database_dump");
dir.mkdir();
OutputStream output = new FileOutputStream("/sdcard/debugdump/myDb.db");
byte[] buffer = new byte[1024];
int length;
while ((length = input.read(buffer))>0) {
output.write(buffer, 0, length);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
e.printStackTrace();
}
After your DB is copied to the sd card you can take it and work with it on your PC using whatever SQLite editor you like. For example: http://www.softpedia.com/get/Internet/Servers/Database-Utils/SqlPro.shtml

Copying file from a Samba drive to an Android sdcard directory

I am new to Android and Samba. I am trying to use the JCIFS copy. To method to copy a file from a Samba directory to the 'Download' directory under sdcard on an Android 3.1 device. Following is my code:
from = new SmbFile("smb://username:password#a.b.c.d/sandbox/sambatosdcard.txt");
File root = Environment.getExternalStorageDirectory();
File sourceFile = new File(root + "/Download", "SambaCopy.txt");
to = new SmbFile(sourceFile.getAbsolutePath());
from.copyTo(to);
I am getting a MalformedURLException on the 'to' file. Is there a way to get around this problem using the copyTo method, or is there an alternate way to copy a file from the samba folder to the sdcard folder using JCIFS or any other way? Thanks.

The SmbFile's copyTo() method lets you copy files from network to network. To copy files between your local device and the network you need to use streams. E.g.:
try {
SmbFile source =
new SmbFile("smb://username:password#a.b.c.d/sandbox/sambatosdcard.txt");
File destination =
new File(Environment.DIRECTORY_DOWNLOADS, "SambaCopy.txt");
InputStream in = source.getInputStream();
OutputStream out = new FileOutputStream(destination);
// Copy the bits from Instream to Outstream
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
// Maybe in.close();
out.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

Android: How to create a directory on the SD Card and copy files from /res/raw to it?

I am trying to create a folder and several subdirectory within it on the SD Card... I then want to transfer files that I have stored in /res/raw to that folder... I addition, I want this to only happen once, the first time the program is ever run. I realize that this is ridiculously open-ended, and that I am asking a lot... but any help would be greatly appreciated.

This will copy all files in the "clipart" subfolder of the .apk assets folder to the "clipart" subfolder of your app's folder on the SD card:
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
String basepath = extStorageDirectory + "/name of your app folder on the SD card";
//...
// in onCreate
File clipartdir = new File(basepath + "/clipart/");
if (!clipartdir.exists()) {
clipartdir.mkdirs();
copyClipart();
}
private void copyClipart() {
AssetManager assetManager = getResources().getAssets();
String[] files = null;
try {
files = assetManager.list("clipart");
} catch (Exception e) {
Log.e("read clipart ERROR", e.toString());
e.printStackTrace();
}
for(int i=0; i<files.length; i++) {
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open("clipart/" + files[i]);
out = new FileOutputStream(basepath + "/clipart/" + files[i]);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch(Exception e) {
Log.e("copy clipart ERROR", e.toString());
e.printStackTrace();
}
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}

I experienced a similar problem when using mkdirs(), however because running the command:
mkdir one/two
fails on Linux, then the method http://download.oracle.com/javase/1.4.2/docs/api/java/io/File.html#mkdirs() subsequently fails too. I guess this means there is no way to use mkdirs on Android? My (probably rather hacky) work-around was to create each necessary directory separately:
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
new File(extStorageDirectory + "/one/").mkdirs();
new File(extStorageDirectory + "/one/two/).mkdirs();