Mega Code Archive
Creates a file storing a UUID on the first application start This UUID can then be used as a identifier of this specific applic
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/*
* Class copied from the Android Developers Blog:
* http://android-developers.blogspot.com/2011/03/identifying-app-installations.html
*/
//package org.acra.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.UUID;
import android.content.Context;
import android.util.Log;
/**
* <p>
* Creates a file storing a UUID on the first application start. This UUID can then be used as a identifier of this
* specific application installation.
* </p>
*
* <p>
* This was taken from <a href="http://android-developers.blogspot.com/2011/03/identifying-app-installations.html"> the
* android developers blog.</a>
* </p>
*/
public class Installation {
private static String sID;
private static final String INSTALLATION = "ACRA-INSTALLATION";
public synchronized static String id(Context context) {
if (sID == null) {
final File installation = new File(context.getFilesDir(), INSTALLATION);
try {
if (!installation.exists()) {
writeInstallationFile(installation);
}
sID = readInstallationFile(installation);
} catch (IOException e) {
// Log.w(ACRA.LOG_TAG, "Couldn't retrieve InstallationId for " + context.getPackageName(), e);
return "Couldn't retrieve InstallationId";
} catch (RuntimeException e) {
// Log.w(ACRA.LOG_TAG, "Couldn't retrieve InstallationId for " + context.getPackageName(), e);
return "Couldn't retrieve InstallationId";
}
}
return sID;
}
private static String readInstallationFile(File installation) throws IOException {
final RandomAccessFile f = new RandomAccessFile(installation, "r");
final byte[] bytes = new byte[(int) f.length()];
try {
f.readFully(bytes);
} finally {
f.close();
}
return new String(bytes);
}
private static void writeInstallationFile(File installation) throws IOException {
final FileOutputStream out = new FileOutputStream(installation);
try {
final String id = UUID.randomUUID().toString();
out.write(id.getBytes());
} finally {
out.close();
}
}
}
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