Develop Reference

toolbar button disappearing when dialog closed

my app is fairly simple and always works IF my IOT device is up.
i need to load a popup and show the ReScan button on the toolbar if the device cannot be found.
the app preloads IPaddress="-" and loads 2 asyncTask(s)
one uses NsdManager.DiscoveryListener to find the mDNS name and loads the IP into IPaddress
this task watches to see IPaddress change and gets the presets from the device by JSON and sets up the UI or pops up the error dialog with instructions if not found.
MY PROBLEM:
when counter >= 15 , i show the "Rescan" Button on the toolbar with setMenuVisible() then popup the error dialog but when the button in the dialog is pressed to close the dialog, the "Rescan" Button disappears again.
Also times out in about 5 seconds.
how do i get the "Rescan" Button to stay?
.
private class getSettingsFromClock extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) {
String mlooper = IPaddress;
Log.i(TAG, "LOG getSettingsFromClock doInBackground started ");
int counter = 0;
while ( mlooper.equals("-") ) {
mlooper = IPaddress;
try {
Thread.sleep(600);
} catch (InterruptedException e) {
e.printStackTrace();
}
counter++;
if (counter >= 15) // in normal operation counter never goes above 3
{
Log.i(TAG, "LOG getSettingsFromClock - NO IP Found, count= " + counter );
runOnUiThread(new Runnable() {
#Override
public void run() {
setMenuVisible( true, R.id.action_rescan); // show rescan button on toolbar
try { // delay is debugging only
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
//scanning failed Popup Dialog
final Dialog dialog = new Dialog(context );
dialog.setContentView(R.layout.popup);
dialog.setTitle("Scan Error");
Button button = dialog.findViewById(R.id.Button01);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
dialog.dismiss();
}
});
dialog.show();
Toast.makeText(getApplicationContext(),
"Could Not get presets from clock. \n check Clock is on and on WiFi\n and reload app.",
Toast.LENGTH_LONG).show();
}
});
break;
}
}
if( IPaddress != "-" )
{
// gets JSON here
} else
{
// add popup - IOT Not found
}
// JSON starts here
if (JSON_return != null) {
try {
// loads presets from JSON to UI here
} catch (final JSONException e) {
Log.e(TAG, "LOG, JSON parsing error: " + e.getMessage());
}
} else
{
Log.e(TAG, "LOG, Could Not get JSON from Clock.");
}
return null;
}
} // end asyncTask class
// remember to run on main thread
// NOTE; private Menu option_Menu; declared in MainActivity
// ie; setMenuVisible( true, R.id.action_rescan);
public void setMenuVisible(boolean visible, int id) {
if (option_Menu != null) {
option_Menu.findItem(id).setVisible(visible);
}
}

Mike M. had it, Thank You Mike
added onPrepareOptionsMenu()
added showRescan = visible; and invalidateOptionsMenu(); to setMenuVisible()
all work perfectly now.
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
try {
if( showRescan )
{
option_Menu.findItem(R.id.action_rescan).setVisible( true );
} else
{
option_Menu.findItem(R.id.action_rescan).setVisible( false );
}
}
catch(Exception e) {
Log.e(TAG, "onPrepareOptionsMenu error");
}
return true;
}
// when task is completed you can show your menu just by calling this method
// remember to run on main thread
// ie; setMenuVisible( true, R.id.action_rescan);
public void setMenuVisible(boolean visible, int id) {
if (option_Menu != null) {
option_Menu.findItem(id).setVisible(visible);
showRescan = visible;
invalidateOptionsMenu();
}
}

When I notifydatasetchanged my adapter every second, click events dont work properly

I want to implement custom progressview on base adapter for showing background download progress on list items, every second I check download progress and update my model, then trigger notifydataset to reflect the progress to UI. Since it couses so may UI refresh operations, I cannot get click events properly. What should I do to overcome this?
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Thread t = new Thread(new Runnable() {
#Override
public void run() {
while (true) {
startJob();
}
}
});
t.start();
return START_STICKY;
}
start job method
public void startJob() {
BusStation.getMainThreadBus().post("deneme");
DownloadManager mDownloadManager = new DownloadManager(getContentResolver(),
getPackageName());
mDownloadManager.setAccessAllDownloads(true);
DownloadManager.Query myDownloadQuery = new DownloadManager.Query();
Cursor cursor = mDownloadManager.query(myDownloadQuery);
ArrayList<Integer> statuses = new ArrayList<>();
try {
DergilikApplication application = (DergilikApplication) getApplicationContext();
HashMap<String, DownloadInfo> downlodInfoHashMap = application.getDownlodInfoHashMap();
while (cursor.moveToNext()) {
int mIdColumnId = cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_ID);
int mIdStatus = cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_STATUS);
int mTotalBytesColumnId = cursor
.getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES);
int mCurrentBytesColumnId = cursor
.getColumnIndexOrThrow(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR);
int mDescrColumnId = cursor
.getColumnIndexOrThrow(DownloadManager.COLUMN_DESCRIPTION);
int uriId = cursor
.getColumnIndexOrThrow(DownloadManager.COLUMN_URI);
int localUriId = cursor
.getColumnIndexOrThrow(DownloadManager.COLUMN_LOCAL_URI);
long totalBytes = cursor.getLong(mTotalBytesColumnId);
String desc = cursor.getString(mDescrColumnId);
long currentBytes = cursor.getLong(mCurrentBytesColumnId);
long downloadId = cursor.getLong(mIdColumnId);
int status = cursor.getInt(mIdStatus);
String localUri = cursor.getString(localUriId);
String uri = cursor.getString(uriId);
if (application.getProfile() != null && desc.contains(application.getProfile().getLoginNumber())) {
statuses.add(status);
DownloadInfo downlodInfo = new DownloadInfo();
downlodInfo.setCurrentProgress(currentBytes);
downlodInfo.setTotalProgress(totalBytes);
downlodInfo.setDescription(desc);
downlodInfo.setStatus(status);
downlodInfo.setDownloadId(downloadId);
downlodInfo.setUri(uri);
downlodInfo.setLocalUri(localUri);
downlodInfoHashMap.put(desc, downlodInfo);
}
}
application.setDownlodInfoHashMap(downlodInfoHashMap);
} finally {
cursor.close();
}
int counter = 0;
for (Integer status : statuses) {
if (!(status == DownloadManager.STATUS_FAILED || status == DownloadManager.STATUS_SUCCESSFUL)) {
counter++;
}
}
if (counter == statuses.size()) {
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
i push event with otto library and notfy data set changed
#Subscribe
public void getMessage(String s) {
try {
dergilerAdapter.notifyDataSetChanged();
} catch (Exception e) {
e.printStackTrace();
}
//tvDownloaded.setText("% " + (int) (percentage * 100));
}

When you call notifyDataSetChanged(), all items of the list view are deleted and recreated. That means you cannot click properly on an item. In addition, you are spamming the UI thread with useless calls.
Prefer use a call to notifyItemChanged(position) to only refresh the row itself where the progress bar is. That way, the click events will be handled properly.

How to pass score parameter in play-services-turn-based methods?

I have just started exploring google-play-services-turnbased APIs. Till now I have been successful in creating a match. But from the documentation I haven't been able to figure out how to player's score after he completes his turn.
This is my onClickStartMatch method.
public void onStartMatchClicked() {
Intent intent =
Games.TurnBasedMultiplayer.getSelectOpponentsIntent(mHelper.getApiClient(), 1, 7, true);
startActivityForResult(intent, RC_SELECT_PLAYERS);
}
This is my onActivityResult method in my main activity class.
if (request == RC_SELECT_PLAYERS) {
if (response != RESULT_OK) {
// user canceled
return;
}
// Get the invitee list.
final ArrayList<String> invitees =
data.getStringArrayListExtra(Games.EXTRA_PLAYER_IDS);
// Get auto-match criteria.
Bundle autoMatchCriteria = null;
int minAutoMatchPlayers = data.getIntExtra(
Multiplayer.EXTRA_MIN_AUTOMATCH_PLAYERS, 0);
int maxAutoMatchPlayers = data.getIntExtra(
Multiplayer.EXTRA_MAX_AUTOMATCH_PLAYERS, 0);
if (minAutoMatchPlayers > 0) {
autoMatchCriteria = RoomConfig.createAutoMatchCriteria(
minAutoMatchPlayers, maxAutoMatchPlayers, 0);
} else {
autoMatchCriteria = null;
}
TurnBasedMatchConfig tbmc = TurnBasedMatchConfig.builder()
.addInvitedPlayers(invitees)
.setAutoMatchCriteria(autoMatchCriteria)
.build();
// Create and start the match.
Games.TurnBasedMultiplayer
.createMatch(mHelper.getApiClient(), tbmc)
.setResultCallback(new MatchInitiatedCallback());
}
This is my MatchInitiatedCallback class
public class MatchInitiatedCallback implements
ResultCallback<TurnBasedMultiplayer.InitiateMatchResult>,OnTurnBasedMatchUpdateReceivedListener {
#Override
public void onResult(TurnBasedMultiplayer.InitiateMatchResult result) {
// Check if the status code is not success.
Status status = result.getStatus();
if (status.isSuccess()) {
Log.d("turnbased","Turn Based Match Initiated successfully with result: "+status.getStatusMessage());
return;
}
TurnBasedMatch match = result.getMatch();
// If this player is not the first player in this match, continue.
if (match.getData() != null) {
showTurnUI(match);
return;
}
// Otherwise, this is the first player. Initialize the game state.
initGame(match);
// Let the player take the first turn
showTurnUI(match);
}
public void showTurnUI(TurnBasedMatch match){
if(match.getStatus() == TurnBasedMatch.MATCH_STATUS_ACTIVE){
if(match.getTurnStatus() == TurnBasedMatch.MATCH_TURN_STATUS_MY_TURN){
turnBasedMatchData = match.getData();
Games.TurnBasedMultiplayer.takeTurn(mHelper.getApiClient(),match.getMatchId(), "score:400".getBytes(Charset.forName("UTF-16")),null).setResultCallback(updateMatchResult());
}
}
}
public void initGame(TurnBasedMatch match){
Games.TurnBasedMultiplayer.takeTurn(mHelper.getApiClient(),match.getMatchId(),"score:605".getBytes(Charset.forName("UTF-16")),match.getParticipantId(Games.Players.getCurrentPlayerId(mHelper.getApiClient()))).setResultCallback(updateMatchResult());
}
public ResultCallback<TurnBasedMultiplayer.UpdateMatchResult> updateMatchResult(){
return null;
}
#Override
public void onTurnBasedMatchReceived(TurnBasedMatch turnBasedMatch) {
Log.d("turn-based","Player played his turn");
}
#Override
public void onTurnBasedMatchRemoved(String s) {
}
}
}
Also it would helpful if some can properly explain how to continue a game a game from start and when to submit score and how.

Figured it out. This is how you can do it.
public byte[] persist() {
JSONObject retVal = new JSONObject();
try {
retVal.put("turnCounter", 2);
retVal.put("score1",100);
retVal.put("score2",200);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String st = retVal.toString();
Log.d(TAG, "==== PERSISTING\n" + st);
return st.getBytes(Charset.forName("UTF-8"));
}
Games.TurnBasedMultiplayer.takeTurn(mHelper.getApiClient(),match.getMatchId(),persist(),null).setResultCallback(updateMatchResult());

NFC tag(for NfcA) scan works only from the second time

I wrote a custom plugin to read blocks of data from an NfcA(i.e.non-ndef) tag. It seems to work fine , but only after the second scan. I am using Activity intent to derive the "NfcAdapter.EXTRA_TAG" to later use it for reading the values. I am also updating the Intents in onNewIntent(). OnNewIntent gets called after the second scan and after that I get result all the time.But in the first scan onNewIntent does not gets called, hence I end up using the Activity tag that does not have "NfcAdapter.EXTRA_TAG", hence I get null. Please see the my code below.
SE_NfcA.java(my native code for plugin)
#Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
String Result = "";
String TypeOfTalking = "";
if (action.contains("TalkToNFC"))
{
JSONObject arg_object = args.getJSONObject(0);
TypeOfTalking = arg_object.getString("type");
if(TypeOfTalking != "")
{
if (TypeOfTalking.contains("readBlock"))
{
if(TypeOfTalking.contains("#"))
{
try
{
String[] parts = TypeOfTalking.split("#");
int index = Integer.parseInt(parts[1]);
Result = Readblock(cordova.getActivity().getIntent(),(byte)index);
callbackContext.success(Result);
}
catch(Exception e)
{
callbackContext.error("Exception Reading "+ TypeOfTalking + "due to "+ e.toString());
return false;
}
}
}
else
{
return false;
}
}
else
{
return false;
}
}
else
{
return false;
}
return true;
}
#Override
public void onNewIntent(Intent intent) {
ShowAlert("onNewIntent called");
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
super.onNewIntent(intent);
getActivity().setIntent(intent);
savedTag = tagFromIntent;
savedIntent = intent;
}
#Override
public void onPause(boolean multitasking) {
Log.d(TAG, "onPause " + getActivity().getIntent());
super.onPause(multitasking);
if (multitasking) {
// nfc can't run in background
stopNfc();
}
}
#Override
public void onResume(boolean multitasking) {
Log.d(TAG, "onResume " + getActivity().getIntent());
super.onResume(multitasking);
startNfc();
}
public String Readblock(Intent Intent,byte block) throws IOException{
byte[] response = new byte[]{};
if(Intent != null)
{
Tag myTag = Intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
if(savedTag != null)
myTag = savedTag;
if(myTag != null)
{
try{
Reader nTagReader = new Reader(myTag);
nTagReader.close();
nTagReader.connect();
nTagReader.SectorSelect(Sector.Sector0);
response = nTagReader.fast_read(block, block);
nTagReader.close();
return ConvertH(response);
}catch(Exception e){
ShowAlert(e.toString());
}
}
else
ShowAlert("myTag is null.");
}
return null;
}
private void createPendingIntent() {
if (pendingIntent == null) {
Activity activity = getActivity();
Intent intent = new Intent(activity, activity.getClass());
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP| Intent.FLAG_ACTIVITY_CLEAR_TOP);
pendingIntent = PendingIntent.getActivity(activity, 0, intent, 0);
}
}
private void startNfc() {
createPendingIntent(); // onResume can call startNfc before execute
getActivity().runOnUiThread(new Runnable() {
public void run() {
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
if (nfcAdapter != null && !getActivity().isFinishing()) {
try {
nfcAdapter.enableForegroundDispatch(getActivity(), getPendingIntent(), getIntentFilters(), getTechLists());
if (p2pMessage != null) {
nfcAdapter.setNdefPushMessage(p2pMessage, getActivity());
}
} catch (IllegalStateException e) {
// issue 110 - user exits app with home button while nfc is initializing
Log.w(TAG, "Illegal State Exception starting NFC. Assuming application is terminating.");
}
}
}
});
}
private void stopNfc() {
Log.d(TAG, "stopNfc");
getActivity().runOnUiThread(new Runnable() {
public void run() {
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
if (nfcAdapter != null) {
try {
nfcAdapter.disableForegroundDispatch(getActivity());
} catch (IllegalStateException e) {
// issue 125 - user exits app with back button while nfc
Log.w(TAG, "Illegal State Exception stopping NFC. Assuming application is terminating.");
}
}
}
});
}
private Activity getActivity() {
return this.cordova.getActivity();
}
private PendingIntent getPendingIntent() {
return pendingIntent;
}
private IntentFilter[] getIntentFilters() {
return intentFilters.toArray(new IntentFilter[intentFilters.size()]);
}
private String[][] getTechLists() {
//noinspection ToArrayCallWithZeroLengthArrayArgument
return techLists.toArray(new String[0][0]);
}
}
My index.js file
nfc.addTagDiscoveredListener(
function(nfcEvent){
console.log(nfcEvent.tag.id);
alert(nfcEvent.tag.id);
window.echo("readBlock#88");//call to plugin
},
function() {
alert("Listening for NFC tags.");
},
function() {
alert("NFC activation failed.");
}
);
SE_NfcA.js(plugin interface for interaction b/w index.js and SE_NfcA.java)
window.echo = function(natureOfTalk)
{
alert("Inside JS Interface, arg =" + natureOfTalk);
cordova.exec(function(result){alert("Result is : "+result);},
function(error){alert("Some Error happened : "+ error);},
"SE_NfcA","TalkToNFC",[{"type": natureOfTalk}]);
};
I guess I have messed up with the Intents/Activity Life-Cycle, please help. TIA!

I found a tweak/hack and made it to work.
Before making any call to read or write, I made one dummy Initialize call.
window.echo("Initialize");
window.echo("readBlock#88");//call to plugin to read.
And in the native code of the plugin, on receiving the "Initialize" token I made a startNFC() call.
else if(TypeOfTalking.equalsIgnoreCase("Initialize"))
{
startNfc();
}

ListView doesn't show

#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setContentView(R.layout.layout_currently);
if(dHolder.getCurrentItems() == null)
{
defineView();
new LoadCurrent().execute(currentItems);
}
else
{
try {
ArrayList<CurrentlyItem> privateCItem = dHolder.getCurrentItems();
Log.d("ListSize", "There is " + privateCItem.size() + " elements on list");
int resID = R.layout.current_item;
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
aa = new CurrentAdapter(this, resID, privateCItem, display.getRotation());
currentListView = (ListView)findViewById(R.id.currentListView);
currentListView.setAdapter(aa);
aa.notifyDataSetChanged();
} catch (Exception e) {
Log.d(" - ERROR", e.toString());
}
}
}
This is a code which should handle screen rotation... Everything works with no error at all but List View doesn't show... I receive ArrayList with 140 elements (reported by Log.d in code) but for some reason List View doesn't show...
Thanks for your answer!