private void checkAndLaunchUpdate() {
Log.i(LOG_FILE_NAME, "Checking for an update");
int statusCode = 8; // UNEXPECTED_ERROR
File baseUpdateDir = null;
if (Build.VERSION.SDK_INT >= 8)
baseUpdateDir = getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS);
else baseUpdateDir = new File(Environment.getExternalStorageDirectory().getPath(), "download");
File updateDir = new File(new File(baseUpdateDir, "updates"), "0");
File updateFile = new File(updateDir, "update.apk");
File statusFile = new File(updateDir, "update.status");
if (!statusFile.exists() || !readUpdateStatus(statusFile).equals("pending")) return;
if (!updateFile.exists()) return;
Log.i(LOG_FILE_NAME, "Update is available!");
// Launch APK
File updateFileToRun = new File(updateDir, getPackageName() + "-update.apk");
try {
if (updateFile.renameTo(updateFileToRun)) {
String amCmd =
"/system/bin/am start -a android.intent.action.VIEW "
+ "-n com.android.packageinstaller/.PackageInstallerActivity -d file://"
+ updateFileToRun.getPath();
Log.i(LOG_FILE_NAME, amCmd);
Runtime.getRuntime().exec(amCmd);
statusCode = 0; // OK
} else {
Log.i(LOG_FILE_NAME, "Cannot rename the update file!");
statusCode = 7; // WRITE_ERROR
}
} catch (Exception e) {
Log.i(LOG_FILE_NAME, "error launching installer to update", e);
}
// Update the status file
String status = statusCode == 0 ? "succeeded\n" : "failed: " + statusCode + "\n";
OutputStream outStream;
try {
byte[] buf = status.getBytes("UTF-8");
outStream = new FileOutputStream(statusFile);
outStream.write(buf, 0, buf.length);
outStream.close();
} catch (Exception e) {
Log.i(LOG_FILE_NAME, "error writing status file", e);
}
if (statusCode == 0) System.exit(0);
}
private void saveData(TelemetryData data) {
PrintWriter out;
boolean newFile = false;
if (saveCnt > 25000) {
File logFile;
int i;
logFile = new File(telemetryDir + 99 + ".log");
logFile.delete();
newFile = true;
for (i = 99; i > 0; i--) {
logFile = new File(telemetryDir + (i - 1) + ".log");
logFile.renameTo(new File(telemetryDir + i + ".log"));
}
saveCnt = 0;
}
try {
String text = "";
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.GERMAN);
saveCnt++;
out = new PrintWriter(new FileOutputStream(telemetryDir + "0.log", true));
if (newFile) {
text =
"Time\tLatitude\tLongitude\tSpeed\tAcceleration X\tAcceleration Y\tAcceleration Z\tCoG\tOrientation Y\tOrientation Z\n\n";
out.print(text);
}
text = dateFormat.format(new Date(System.currentTimeMillis())) + "\t";
if (posValid) text = text + lastLat + "\t" + lastLon + "\t" + m_lastSpeed + "\t";
else text = text + "-\t-\t-\t";
text =
text
+ data.getAccelX()
+ "\t"
+ data.getAccelY()
+ "\t"
+ data.getAccelZ()
+ "\t"
+ data.CoG
+ "\t"
+ data.getOrientY()
+ "\t"
+ data.getOrientZ()
+ "\n\n";
out.print(text);
out.close();
} catch (IOException ioe) {
}
}