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);
}
@Override
public void onCreate(Bundle savedInstanceState) {
// locks the screen in portrait mode
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
super.onCreate(savedInstanceState);
setContentView(R.layout.downloader);
mtext = (TextView) findViewById(R.id.mtext);
progress_text = (TextView) findViewById(R.id.progress_text);
progress_download = (ProgressBar) findViewById(R.id.progress_download);
// resume capability
paused = false;
resume_pause = (Button) findViewById(R.id.resume);
// Create and launch the download thread
downloadThread = new DownloadThread(this);
downloadThread.start();
// Create the Handler. It will implicitly bind to the Looper
// that is internally created for this thread (since it is the UI thread)
handler = new Handler();
resume_pause.setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
if (!paused) {
paused = true;
resume_pause.setText("Resume");
// writeProgress(completed_downloads,total_files_to_download);
downloadThread.requestStop();
downloadThread = null;
} else {
resume_pause.setText("Pause");
paused = false;
initial_value = readProgress()[0];
final_value = links.size();
for (int i = initial_value; i < links.size(); i++) {
downloadThread = new DownloadThread(download_photos.this);
downloadThread.start();
downloadThread.enqueueDownload(
new DownloadTask(
links.get(i), path, i + 1, links.size(), download_photos.this));
}
}
}
});
// load preferences for this activity
mPrefs = getSharedPreferences("COMMON", MODE_PRIVATE);
// This declaration is solely meant for reading the checkbox preference for downloading high res
// pics.
SharedPreferences dl_prefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
// The global variable is set after reading the checkbox preference.
dl_high_res_pics = dl_prefs.getBoolean("download_high_res", false);
// load fb access token and its expiry values
String access_token = mPrefs.getString("access_token", null);
long expires = mPrefs.getLong("access_expires", 0);
if (access_token != null) {
facebook.setAccessToken(access_token);
}
if (expires != 0) {
facebook.setAccessExpires(expires);
}
// get friend_name and album_name from the intent which started this activity
Intent starting_intent = getIntent();
album_id = starting_intent.getStringExtra("id");
album_name = starting_intent.getStringExtra("name");
friend_name = starting_intent.getStringExtra("friend_name");
// real album and friend name may contain characters not suitable for file names.
// regex pattern includes most of the invalid characters in file names
legal_album_name = album_name.replaceAll("[.\\\\/:*?\"<>|]?[\\\\/:*?\"<>|]*", "");
legal_friend_name = friend_name.replaceAll("[.\\\\/:*?\"<>|]?[\\\\/:*?\"<>|]*", "");
// initialise the directory structure for download
path =
new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
+ "/"
+ getText(R.string.app_name)
+ "/"
+ legal_friend_name
+ "/"
+ legal_album_name);
if (dl_high_res_pics)
path = new File(path.toString() + "/" + getText(R.string.folder_name_high_res));
resume_file = new File(path, "resume.txt");
// implements actions to done after receiving json object
class meRequestListener extends BaseRequestListener {
@Override
public void onComplete(String response, Object state) {
try {
Log.i(TAG, response);
json = Util.parseJson(response);
// photos are in the form of a json array
child = json.getJSONArray("data");
int total = child.length();
// contains links to photos
links = new ArrayList<String>(total);
// adds link to each photo to our list after replacing the "https" from url
// DownloadManager does not support https in gingerbread
for (int i = 0; i < total; i++) {
photo_json = child.getJSONObject(i);
if (dl_high_res_pics) {
JSONArray image_set = photo_json.getJSONArray("images");
// highest resolution picture has the index zero in the images jsonarray
JSONObject highest_res_pic = image_set.getJSONObject(0);
String http_replaced =
highest_res_pic.getString("source").replaceFirst("https", "http");
links.add(i, http_replaced);
} else {
// source property of the json object points to the photo's link
String http_replaced = photo_json.getString("source").replaceFirst("https", "http");
links.add(i, http_replaced);
}
}
download_photos.this.runOnUiThread(
new Runnable() {
public void run() {
// mytask = new DownloadImageTask();
// mytask.execute(links);
// start downloading using asynctask
// new DownloadImageTask().execute(links);
// downloadThread.setPath(path);
// downloadThread.setWholeTasks(links.size());
if (resume_file.exists()) {
initial_value = readProgress()[0];
final_value = links.size();
// case if the task is already completed
if (initial_value == final_value) {
completed = true;
resume_pause.setVisibility(View.GONE);
progress_download.setMax(final_value);
progress_download.setProgress(0); // bug in progress bar
progress_download.setProgress(initial_value);
progress_text.setText("Completed.");
mtext.setText(
getText(R.string.download_textview_message_1)
+ " "
+ path.toString()
+ ". ");
}
// case if some of the photos are already downloaded
else {
progress_download.setMax(links.size());
// progress_download.setProgress(0); //bug in progress bar
progress_download.setProgress(initial_value);
// N.B if i= initial_value -1, then one image will be downloaded again. so to
// save cost we start with i = initial_value
for (int i = initial_value; i < links.size(); i++) {
mtext.setText(
getText(R.string.download_textview_message_1)
+ " "
+ path.toString()
+ ". ");
// downloadThread.setRunningTask(i + 1);
downloadThread.enqueueDownload(
new DownloadTask(
links.get(i), path, i + 1, final_value, download_photos.this));
}
}
}
// case if the task is entirely new task
else {
for (int i = 0; i < links.size(); i++) {
mtext.setText(
getText(R.string.download_textview_message_1)
+ " "
+ path.toString()
+ ". ");
// downloadThread.setRunningTask(i + 1);
downloadThread.enqueueDownload(
new DownloadTask(
links.get(i), path, i + 1, links.size(), download_photos.this));
}
}
}
});
} catch (JSONException ex) {
Log.e(TAG, "JSONEXception : " + ex.getMessage());
}
}
}
// makes asynchronous request to facebook graph api
// the actions to be performed after receiving json response is implemented above
Bundle parameters = new Bundle();
// facebook returns only 25 photos when limit is not specified.
parameters.putString("limit", max_photos_in_album);
if (!completed) mAsyncRunner.request(album_id + "/photos", parameters, new meRequestListener());
if (!facebook.isSessionValid()) {
facebook.authorize(
this,
permissions,
new DialogListener() {
// save fb access token and its expiry values to prefernces of this activity
@Override
public void onComplete(Bundle values) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString("access_token", facebook.getAccessToken());
editor.putLong("access_expires", facebook.getAccessExpires());
editor.commit();
}
@Override
public void onFacebookError(FacebookError error) {
Log.e(TAG, "Facebook Error : " + error.getMessage());
}
@Override
public void onError(DialogError e) {
Log.e(TAG, e.getMessage());
}
@Override
public void onCancel() {
// do nothing LOL :-)
}
});
}
}