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• Android - Where to store generated bitmaps?

  - by Josh

  I've got an app which dynamically generates anywhere from 6 to 100 small bitmaps for the user to move around the screen in a given session. I currently generate them in onCreate and store them to the sd card, so that after an orientation change I can grab them out of external storage and display them again. However, this takes time (the loading) and I'd like to keep the bitmap references around between lifecyle changes for quicker access. My question is, is there a better place to store my generated bitmaps? I was thinking about creating a static storage library in my base activity, something that would only need to be reloaded when the app is completely removed from memory (shutdown, other apps need resources, 30 minute restart, etc). Ideally, I'd like the user to be able to back out to the title screen, click a "Resume" button, and in onCreate I just have access to those resident bitmap references instead of having to load them from storage again. For this reason I don't think Activity.onRetainNonConfigurationInstance is what I need. Alternatively, is there a better way to handle multiple generated bitmaps than what I'm doing or the plan I described?

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• Android: Playing sound when button clicked?

  - by gazeebo

  Hi all, I'm trying to play a sound file when a button is clicked but keeps getting an error. The error is "The method create(Context, int) in the type MediaPlayer is not applicable for the arguments (new View.OnClickListener(){}, int)" Here's my code: @Override public void onClick(View v) { // TODO Auto-generated method stub Button zero = (Button)this.findViewById(R.id.btnZero); zero.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub mp = MediaPlayer.create(this, R.raw.mamacita_zero); } }); } Any help or tips would be appreciated. Thnx!

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• Android: Music track visualization

  - by Swathi EP

  Hello all, I want to create an music track visualization for an music player application which should look like as below: you can see in the above image that, there is an equalizer kind of view and it should vary as the music track is played. I need to know the right way to achieve the above visualization, which api to use?, etc., Any suggestion will be greatly helpful to me. Thanks, Swathi

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• Can FLV AAC stream be played in Android

  - by HariKJ

  Hi, I'm trying to build a radio player and the client is providing a stream which is a FLV container with the audio being AAC When I read the headers it shows up as audio/aacp. I have tried all possible ways such as using the 1) Streaming through mediaplayer (Does not work) 2) Use the NPR mode of using a proxy stream (I get a broken pipe exception) 3) Play it in chunks ( Plays but I need the SDCard and the playback is not very great) 4) Use the GPL'd FAAD2 Library but I would have to pay the royalty fee Can some one help me out on figuring this issue out. The last option that I have is to have my client change the stream to mp3 container (which I know that it works) Regards, Hari

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• Add newlines to a text resource in Android?

  - by shmuelp

  I have a custom Dialog that contains only a TextView to display some text in my application. The documentation lists that only the b, i, u, tt, big, small, sup, sub, and strike tags are supported. I really need to add some newlines for readability. Do I need to change to a more complicated layout, or is there some way to encode newlines in the resource? I tried adding br tags, but that did not help.

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• android does not display "" inside TextView?

  - by UMMA

  dear friends, i am trying to display STRING my car name is "abc" in textview. it displays &qoute;abc&qoute; after running application. i have tried decoding into " and then assigning it to TextView but it always convert " to &qoute; can any one guide me how to solve this issue? any help would be appriciated.

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• EditText selects by default?

  - by GuyNoir

  Whenever I have an EditText field in my android application, it is highlighted with the blinking cursor for input as soon as the activity is started (though the keyboard doesn't pop up). How can I disable this?

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• Android quotes within an sql query string

  - by miannelle

  I want to perform a query like the following: uvalue = EditText( some user value ); p_query = "select * from mytable where name_field = '" + uvalue + "'" ; mDb.rawQuery( p_query, null ); if the user enters a single quote in their input it crashes. If you change it to: p_query = "select * from mytable where name_field = \"" + uvalue + "\"" ; it crashes if the user enters a double quote in their input. and of course they could always enter both single and double quotes.

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• Android how to create notification that resumes activity

  - by Adam Praiswater

  I a have a notification in a receiver that fires off fine, but it restarts the activity (thus clearing the edittexts and resetting the toggle button) How can i set it so that when its tapped on it resumes the activity rather that clearing and resetting everything? My current code doesnt work. Current Code String currentDateTimeString = DateFormat.getDateTimeInstance().format(new Date()); Intent intenti= new Intent(context, Locator.class); intenti.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, intenti, 0); NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context) .setSmallIcon(R.drawable.xxxxxxnotifyicon) .setContentTitle("xxxxxxx Link") .setContentText("Auto Check In Complete at " + currentDateTimeString); mBuilder.setContentIntent(contentIntent); mBuilder.setDefaults(Notification.DEFAULT_SOUND); mBuilder.setAutoCancel(true); NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); mNotificationManager.notify(1, mBuilder.build());

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• Android: How do you delete a folder starts with period

  - by jclova

  I am trying to delete a folder in sdcard. I can delete normal directories, but a directory that starts with period cannot be deleted. (ex. ".helloDir") if (dir.isDirectory()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { new File(dir, children[i]).delete(); } } children is null if dir starts with period (ex. ".helloDir").

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• Android: heavy traffic on server causes app to force close

  - by user522559

  I have developed an app to communicate with my own server and published it. However, sometimes the app force closes. I know there is no bug in the code because the app works properly most of the time, but sometimes it is waiting for an answer from the server forever. I think this is due to the fact that so many people are using the app, and the app refreshes every 1 second or so, so this heavy traffic causes the server to take a large amount of time to respond. So how do you take care of such a use case? should I have a use case where if the server does not respond after some time you just stop the app and throw a message saying that the server is not responding or something like that?

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• Android: Issue with acceptable file types via bluetooth

  - by poeschlorn

  Hi guys, i've got a problem with pushing files to my nexus one: It seems to me that there is only a small selection of file types that are accepted by my phone (such like jpg, gif and so on). I recently tried to push other files to my phone (in my case gpx) and my phone has rejected it automatically... is there a way to bypass or extent this filter? Is there also a way to catch those files by a service? greets, poeschlorn

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• Making a web request and getting request in JSON format in android

  - by Rahul Varma

  Hi, I am trying to accomplish the task of Making a Wed request -getting result in JSON format -Parsing the result - and finally display the result in a table.... Any help regarding any of the task is welcome....

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• Make a String text Bold in Java Android

  - by meskh

  I want to make Habit Number: bold , I tried the HTML tag but it didn't work. I did some research but couldn't find any. Hope someone is able to help me. Thanks! String habitnumber = "Habit Number: " + String.valueOf(habitcounter); String Title = habit.getTitle(); String description = habit.getDescription(); //Set text for the row tv.setText(habitnumber+ "\n" + Title + " \n" + description + "\n --------------------");

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• Embed a database in the .apk of a distributed application [Android]

  - by Sephy

  Hi everybody, My question is I think quite simple but I don't think the answer will be... I have quite a lot of content to have in my application to make it run properly, and I'm thinking of putting all of it in a database, and distribute it in an embeded database with the application in the market. The only trouble is that I have no idea of how to do that. I know that I can extract a file .db from Eclipse DDMS with the content of my database, and I suppose I need to put it in the asset folder of my application, but then how to make the application use it to regenerate the application database? If you have any link to some code or help, that would be great. Thanks

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• Android Assets No Value Read?

  - by BahaiResearch.com

  AssetManager assets = myContext.getAssets(); String[] files = assets.list("MyFolder"); InputStream myInput = assets.open("MyFolder/" + files[0]); int i = myInput.read(); in this case 'i' is -1 meaning nothing read. Why would nothing be there if the file is there, the variable 'files' has the file as well. Do I need to do anything to the file I put into the Assets folder in get it to be readable?

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• Radio Button selection Changes Toast on Android

  - by Bub

  I was writing a simple test application. There are two radio buttons within the app. There id's are "radio_red" and "radio_blue". I wanted to create an onClickListener event that read the text associated to the button and then returned a basic "Right" or "Wrong" toast. Here is a sample of the code: private OnClickListener radio_listener = new OnClickListener() { public void onClick(View v){ RadioButton rb = (RadioButton) v; String ans = rb.getText().toString(); String an1 = ""; if (ans.trim() == "Yes") { ans = "That's Right."; } else if (ans.trim() == "No") { ans = "thats wrong."; } else { ans = "none."; } Toast.makeText(v.getContext(), ans , Toast.LENGTH_SHORT).show(); } So far no joy. Here is my code snippet. I've checked my "main.xml" and the text associated to the buttons are referneced correctly. I added trim to make sure of that. However, all that is ever returned in the toast is "none." What am I missing? Thanks in advance for any help.

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• Date and time picker in one view...

  - by Rahul Varma

  Hi guys, I wanted to know whether we can implement both date and time picker in one view... In iphone app you can pick both date and time through one view. But in android we have date picker and time picker seperately. So, is there any method by which i can get values of both date and time from one view???

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• Android onActivityResult is always 0

  - by Dean

  This has been killing me for two days now. I have a main Activity A which calls a second Activity B. Activity B simply presents the user with a listview. When I press an item on the list view I want a couple of strings to be passed back to the main Activity A and Activiy B will finish. The problem is I always get a resultcode of 0 and the data bundle is null. I really don't understand why this is happening. Here is my code. Start Activity B for result; Test.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(recipeActivity.this, BrowseLoadRecipes.class); startActivityForResult(i, RECIPE_CHOOSER); } }); This starts the second Activity fine. Activity B populates a listview and when I click an item I'm trying to send some data back to the calling Activity A. Any text at the moment, so I used the following in Activity B; lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> a, View v, int position, long id) { Bundle bundle = new Bundle(); bundle.putString("TEXT", "Please work... pleeeeaasee"); Intent mIntent = new Intent(); mIntent.putExtras(bundle); setResult(RESULT_OK, mIntent); finish(); } }); In the calling activity I have the following listening for the return as follows; protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch(requestCode) { //TODO case RECIPE_CHOOSER: Toast.makeText(getApplicationContext(), "In recipe return", Toast.LENGTH_SHORT).show(); Toast.makeText(getApplicationContext(), "resultCode is " + String.valueOf(resultCode), Toast.LENGTH_SHORT).show(); if (resultCode == RESULT_OK) { Bundle b = getIntent().getExtras(); Toast.makeText(getApplicationContext(), "Returned " + b.getString("TEXT"), Toast.LENGTH_LONG).show(); } if (resultCode == RESULT_CANCELED) { } break; } } } I can see that the request code is correctly returned, but the resultcode is always a 0 and the data is always a null. I've ran through the debug and the setResult is doing its job and the bundle does indeed have the data I'm passing, but it's lost at some point along the way. Is there something in the manifest I'm missing or something. It's killed my progress on this project so far. Any help would truly be appreciated. Thanks, Dean

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• In Android GUI flickers when reading the properties file

  - by ManojValiveti

  Hi, I am getting the GUI flicker when reading a file properties and accordingly enabling/disabling checkbox and List value in listbox. when i remove this file reading code the GUI doesnt have flicker. I am reading the properties before creating the Preferences in OnCreate(). Attached the file write code below for reference.Please let us know is there any other way to read and update the preference staus. private void SetExtendConf(String key, String strValue) { mProperties = new Properties(); try { File file = new File(FILE_EXT); if(!file.exists()) file.createNewFile(); file.setWritable(true,false); FileInputStream fis = new FileInputStream(file); mProperties.load(fis); fis.close(); FileOutputStream stream = new FileOutputStream(file); Log.d(TAG, "Setting Values " + key + ":"+ strValue); mProperties.setProperty(key, strValue); mProperties.store(stream,"ext.conf"); stream.close(); } catch (IOException e) { Log.d(TAG, "Could not open properties file: " + GPS_FILE_EXT); } } -Manoj

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• two android threads and not synchronized data

  - by Sponge

  i have a (perhaps stupid) question: im using 2 threads, one is writing floats and one is reading this floats permanently. my question is, what could happen worse when i dont synchronize them? it would be no problem if some of the values would not be correct because they switch just a little every write operation. im running the application this way at the moment and dont have any problems so i want to know what could happen worse? a read/write conflict would cause a number like 12345 which is written to 54321 and red at the same time appear for example as 54345 ? or could happen something worse? (i dont want to use synchronization to keep the code as fast as possible)

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• How to check if EditText has a value in Android / Java

  - by Allen Gingrich

  This should be simple, but I have tried if statements checking for null values and also ones checking the .length of it: EditText marketValLow = (EditText) findViewById(R.id.marketValLow); EditText marketValHigh = (EditText) findViewById(R.id.marketValHigh); if (marketValLow.getText().length() != 0 && marketValHigh.getText().length() != 0) { Intent intent = new Intent(); intent.setClass(v.getContext(), CurrentlyOwe.class); startActivity(intent); } else { Toast.makeText(CurrentMarketValue.this, "You need to enter a high AND low.", Toast.LENGTH_SHORT); } But it doesn't detect nothing was entered. Any ideas? Thanks!

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• How Android BaseAdapter notifyDataSetChanged works?

  - by Yama moto

  In the document for the method notifyDataSetChanged of class BaseAdapter noted that "Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself. " Supposed I changed the 3rd element in my string array (array data for the listview), what "any View reflecting the data set should refresh itself" means ? Does the 3rd view item in my list view be notified ? Also, how is notifyDataSetChanged() and getView() concerned ? Thanks in advance

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• android, google map errors: BaseTileRequest, Server returned: 3

  - by Tung Mai Le

  I got some strange errors while develop some custom map overlays, anyone experience these? pls help, tks in advance. BaseTileRequest.readResponseData(BaseTileRequest.java:115) MapService$MapTileRequest.readResponseData(MapService.java:1473) MapService$MapTileRequest.readResponseData(MapService.java:1473) 09-17 00:53:25.933: WARN/System.err(32480): java.io.IOException: Server returned: 3 09-17 00:53:25.933: WARN/System.err(32480): at android_maps_conflict_avoidance.com.google.googlenav.map.BaseTileRequest.readResponseData(BaseTileRequest.java:115) 09-17 00:53:25.938: WARN/System.err(32480): at android_maps_conflict_avoidance.com.google.googlenav.map.MapService$MapTileRequest.readResponseData(MapService.java:1473) 09-17 00:53:25.938: WARN/System.err(32480): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.processDataRequest(DataRequestDispatcher.java:1117) 09-17 00:53:25.943: WARN/System.err(32480): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher.serviceRequests(DataRequestDispatcher.java:994) 09-17 00:53:25.943: WARN/System.err(32480): at android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher$DispatcherServer.run(DataRequestDispatcher.java:1702) 09-17 00:53:25.948: WARN/System.err(32480): at java.lang.Thread.run(Thread.java:856)

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• Android lifecycle of thread-based game

  - by ehehhh

  I ran into a bit of trouble while trying to get my game to work correctly after being put to the background by the user or a phone call for example. My app has a SurfaceView class called GameView, which has the onDraw() method to do all the necessary drawing for my game and two threads - one for calling the onDraw() and one for doing the necessary calculations for the game's logic. I succesfully implemented onPause() and onResume(). (I paused both threads when back button was pressed and resumed them after user cancelled in the AlertDialog.) Now I would like to have the game paused the same way when onStop() gets called. I put both threads on pause and saved my characters location in the savedInstanceState, but when I start my app again, no method gets called (I checked with Logcat). I believe onRestart() should be called first, then onStart() and then onResume(), but none of that happens. What am I doing wrong? (Didn't include any code, because it seems to be a problem of me not understanding the lifecycle, not a problem in code. If it seems necessary, I'll post the parts you request.)

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