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  • What's the easiest way to sort a ContentResolver query by custom order?

    - by Pentium10
    I am faceing a problem where I need to sort my ContentResolver in a custom order. Take for example Contact Groups, you can define and manage them using Android's data database. But if you query this, you are limited to do order by on the name of the group only or id. In my scenarion I need to sort them in an order (other than alphabetic) that I've stored in my database. Take for example this example: Colleagues Excluded Family Friends But the order I want them to display is: Family Colleagues Friends Excluded So how would you accomplish this task?

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  • Calling notifyDataSetChanged doesn't fire onContentChanged event of SimpleCursorAdapter

    - by Pentium10
    I have this scenario onResume of an activity: @Override protected void onResume() { if (adapter1!=null) adapter1.notifyDataSetChanged(); if (adapter2!=null) adapter2.notifyDataSetChanged(); if (adapter3!=null) adapter3.notifyDataSetChanged(); super.onResume(); } Adapter has been defined as: public class ListCursorAdapter extends SimpleCursorAdapter { Cursor c; /* (non-Javadoc) * @see android.widget.CursorAdapter#onContentChanged() */ @Override protected void onContentChanged() { // this is not called if (c!=null) c.requery(); super.onContentChanged(); } } And the onContentChanged event is not fired, although the onResume and the call to the adapter is issued. What is wrong?

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  • Trying to parse links in an HTML directory listing using Java regex

    - by DiskCrasher
    Ok I know everyone is going to tell me not to use RegEx for parsing HTML, but I'm programming on Android and don't have ready access to an HTML parser (that I'm aware of). Besides, this is server generated HTML which should be more consistent than user-generated HTML. The regex looks like this: Pattern patternMP3 = Pattern.compile( "<A HREF=\"[^\"]+.+\\.mp3</A>", Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE); Matcher matcherMP3 = patternMP3.matcher(HTML); while (matcherMP3.find()) { ... } The input HTML is all on one line, which is causing the problem. When the HTML is on separate lines this pattern works. Any suggestions?

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  • How to execute a osmdroid application?

    - by Rupesh Chavan
    Hello everyone, Can someone please tell me what are the steps to execute a osmdroid application. I have Eclipse installed on my machine along with ADT plugin and i have downloaded the source code and imported it in a eclipse. and tried to run it on Android 1.6 platform but somehow i am not getting the map instead i m just getting blank screen with grid in it. Are there any configurations has to be done which i am missing? Any help or any tutorial to execute osmdroid application will be appreciated. Thanks, Rupesh

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  • how to play video from url

    - by priyanka
    i am biginner in android development and try to play video from link but it's give error "sorry,we can't play this video" i tride so many links but for all links its show same error. My code it follwing public class VideoDemo extends Activity { private static final String path ="http://demo.digi-corp.com/S2LWebservice/Resources/SampleVideo.mp4"; private VideoView video; private MediaController ctlr; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); getWindow().setFormat(PixelFormat.TRANSLUCENT); setContentView(R.layout.videoview); video = (VideoView) findViewById(R.id.video); video.setVideoPath(path); ctlr = new MediaController(this); ctlr.setMediaPlayer(video); video.setMediaController(ctlr); video.requestFocus(); } } thansk in advance

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  • OutOfMemoryError what to increase and how?

    - by Pentium10
    I have a really long collection with 10k items, and when running a toString() on the object it crashes. I need to use this output somehow. 05-21 12:59:44.586: ERROR/dalvikvm-heap(6415): Out of memory on a 847610-byte allocation. 05-21 12:59:44.636: ERROR/dalvikvm(6415): Out of memory: Heap Size=15559KB, Allocated=12932KB, Bitmap Size=613KB 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): Uncaught handler: thread main exiting due to uncaught exception 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): java.lang.OutOfMemoryError 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:97) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:155) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.StringBuilder.append(StringBuilder.java:202) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.util.AbstractCollection.toString(AbstractCollection.java:384) I need step by step guide how to increase the heap for and Android application. I don't run the command line.

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  • ScrollView alawys scrolling to the bottom

    - by Sebi
    I defined a scrollview with a texteedit in my layout: <ScrollView android:fillViewport="true" android:layout_marginBottom="50dip" android:id="@+id/start_scroller" android:layout_height="fill_parent" android:layout_width="fill_parent" android:fadingEdge="none"> <TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="wrap_content" > </TextView> </ScrollView> I add text to this ScrollView with the following method: public void writeToLogView(String textMsg) { if (text.getText().equals("")) { text.append(textMsg); } else { text.append("\n" + textMsg); scroller.scrollBy(0, 1000000); } } As you can see i append the text and try to scroll to the bottom of the ScrollView. Unfortunately this doesn't worked correctly. It scrolls down, but not always, and not always to the bottom. Any hints?

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  • How to handle application upgrades from free to paid version while preserving any data

    - by cdonner
    Here is the context. I want to have a free version and a premium version of the same application. When people buy the application, I want them to be able to "upgrade" without losing their data, i.e. the premium version should install over the free version. I want to use the same code base and just switch a setting to build the premium version. Andoid Market does not let me convert a free app to a paid app, so the trivial option is not available. I am curious if someone has tried this successfully. How does Android Market identify an application - will it think that the premium version is a different app and just install it in parallel?

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  • Can 2 different applications use the same database?

    - by cdonner
    Without additional context, the answer is "no", I think. Here is the context. I want to have a free version and a premium version of the same application. When people buy the application, I want them to be able to "upgrade" without losing their data, i.e. the premium version should install over the free version. I want to use the same code base and just switch a setting to build the premium version. Andoid Market does not let me convert a free app to a paid app, so the trivial option is not available. I am curious if someone has tried this successfully. How does Android Market identify an application - will it think that the premium version is a different app and just install it in parallel?

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  • Using listpreference and getting the key works but no ok button...

    - by Allan
    I'm using listpreference in my android app and getting my key values and all is well and works good (now that you guys have helped me) BUT - when my listpreference menus popup, they only contain a cancel button. Let's say the user is choosing between red, blue, and green. When the listpreference dialog first pops-up, the dialog only shows a cancel button. Because of that, the dialog disappears as soon as the user selects their choice. I would like it so that when the user chooses their setting, they see the radio button get highlighted and then they go ahead and click the ok button...but I don't have an ok button and can't figure out why. Any help would be awesome...al

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  • different location of AndroidManifest.xml

    - by didito
    i have a custom buildchain for an android project. there is a build.xml and build.properties. build.properties contains this line: manifest.file =${env.WORK_FOLDER}/AndroidManifest.xml and WORK_FOLDER is correctly set to proj_root_work. the layout is like the following: proj_root-_work [DIR] (some stuff gets preprocessed and all finally copied here - src, res, assets and the AndroidManifest.xml) -build.xml -build.properties then i call ant for my build configuration from the proj_root and it complains about not finding AndroidManifest.xml. when i put it in my proj_root it works, but i really want it in my _Work directory. i read that the file HAS TO BE in the root, what is the point then of the build.properties entry? also i saw some custom parameters to aapt.exe ... any hints welcome, thx

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  • Menu item ID is not recognized

    - by Alex Farber
    menu/activity_main.xml: <menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/menu_settings" android:title="@string/menu_settings" android:showAsAction="never" /> <item android:id="@+id/menu_save_log" android:title="@string/menu_save_log" android:showAsAction="never" /> </menu> MainActivity.java: //@Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_settings: // OK break; case R.id.menu_save_log: // menu_save_log cannot be resolved or is not a field break; } return true; } Why menu_save_log is not recognized?

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  • Launch Google Maps app

    - by oriharel
    Hi, I'm trying to launch Google maps from my application. I'm using: GeoPoint center = _mapView.getMapCenter(); Uri uri = Uri.parse("geo:"+center.getLatitudeE6()+","+center.getLongitudeE6()); Log.d(LOG_TAG, "Launching Google Maps with Uri: ("+uri+")"); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); I tested it with a map centered on somewhere in NYC, however Google maps opens not centered there. I followed Android Developer's site reference to use: "geo:latitude,longitude" pattern. the log that you see prints: Launching Google Maps with Uri: (geo:40763500,-73979305) anyone knows what can be the problem?

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  • custom button: properties change, button should be redrawn

    - by Rutger
    Hi I'm developing an Android app. I have class derived from button to represent a special type of button. This special type has some properties (integers) and according to these one or more circles have to be drawn on top of the button. So I overrode the onDraw function, which looks the values up and accordingly draws the circles. But the class has a function to set new values for its properties. So new values are set but the changes are not reflected in the UI. It seems like the onDraw function is not called. When later I click the button or show a pop up message above my interface the onDraw function is called and the button is drawn correctly. So my question: when changing the properties how can I say that the button has to be redrawn? Thanks a lot!

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  • Robotium Uniting Testing on an application having multiple processes

    - by warenix
    I have written an application running activities in multiple processes. I tried Robotium by creating a new test project set target package to my application. When I executed it, the test stopped with the following error message: Error in testDisplayBlackBox: java.lang.RuntimeException: Intent in process com.abc.def resolved to different process com.abc.def:mail: Intent { act=android.intent.action.MAIN flg=0x10000000 cmp=com.abc.def/com.abc.def.email.activity.Welcome } at android.app.Instrumentation.startActivitySync(Instrumentation.java:377) at android.test.InstrumentationTestCase.launchActivityWithIntent(InstrumentationTestCase.java:119) at android.test.InstrumentationTestCase.launchActivity(InstrumentationTestCase.java:97) at android.test.ActivityInstrumentationTestCase2.getActivity(ActivityInstrumentationTestCase2.java:104) at com.abc.def.test.TestApk.setUp(TestApk.java:31) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1584) Test results for InstrumentationTestRunner=.E Time: 0.027 FAILURES!!! Tests run: 1, Failures: 0, Errors: 1 Is it possible to have any workaround provided that I have source code in hand?

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  • Setting Priorities on Buttons

    - by JONY
    Hello Android Developers, I am trying to figure out how to set priorities on imagebutton. I want to have a layout with a bunch of Icon or buttons that can be selected either by touch, radio, or checked box. As these images are selected they are set on queue to be displayed in order of Precedence. (that is to be pre-determined). The images are displayed once the main action button is touched. Any help will be greatly appreciated. Thank you,

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  • How can one connect to an RFCOMM device other than another phone in Android?

    - by Charles Duffy
    The Android API provides examples of using listenUsingRfcommWithServiceRecord() to set up a socket and createRfcommSocketToServiceRecord() to connect to that socket. I'm trying to connect to an embedded device with a BlueSMiRF Gold chip. My working Python code (using the PyBluez library), which I'd like to port to Android, is as follows: sock = bluetooth.BluetoothSocket(proto=bluetooth.RFCOMM) sock.connect((device_addr, 1)) return sock.makefile() ...so the service to connect to is simply defined as channel 1, without any SDP lookup. As the only documented mechanism I see in the Android API does SDP lookup of a UUID, I'm slightly at a loss.

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  • Setting Priorities on Bottons

    - by JONY
    Hello Android Developers, I am trying to figure out how to set priorities on imagebutton. I want to have a layout with a bunch of Icon or buttons that can be selected either by touch, radio, or checked box. As these images are selected they are set on queue to be displayed in order of Precedence. (that is to be pre-determined). The images are displayed once the main action button is touched. Any help will be greatly appreciated. Thank you,

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  • Read SharedPreferences when you haven't set the name of the file.

    - by Pentium10
    When you createa a PreferenceScreen on Android, your application creates a default SharedPreferences file for the settings. I want to read this name, or get a reference without specifing the name. Currently I use: SharedPreferences prefs = ctx.getSharedPreferences("prefs", 0); SharedPreferences.Editor ed=prefs.edit(); But this returns another copy of the preference. When I checked the folder in /data/data/myapk/shared_prefs I see two files, one named prefs.xml and the other is my [package name]_preferences.xml (this was created by the PreferenceActivity); How do I get an instance of the shared preference with the usage of the default file name, so I should not mention a name for it?

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  • OpenGL ES canvas size

    - by Chaoz
    Ahoy, I'm working on an OpenGL ES based game for Android using the NDK. My application is targeted towards SDK 1.6 and above. I seem to be having a problem creating a canvas of the phones native size. My rendering is done through a native gameloop that uses OpenGL 1.0. I'm using the emulator and that gives me a 480x320 canvas -- this is totally fine. Then, when I run the same application on my HTC Desire which has a native resolution of 800x480 I'm getting a canvas of 533x320. Anyone have any information on how to deal with/solve this? Any other information about this is also appreciated. Thanks in advance!

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  • Smartest way to draw 100+ images on screen

    - by Henrik
    Hello all, First of all I'm a newbie when it comes to Android programming. So if this question is totally stupid please delete it ASAP :-). Question: I'm going to draw a grid of 10x10 PNG images. Each image is 32x32 px. All of the images are unique. I'm thinking that the easiest way seems to be to put each image in an ImageView. If adding all ImageView's to the layout would this give me some kind of performance hit? Would there be any smarter way to draw these images? Thanks. / Henrik

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  • camera preview on androd - strange lines on 1.5 version of sdk

    - by Marko
    Hi all, I am developing the camera module for an android application. In main application when user clicks on 'take picture' button, new view with SurfaceView control is opened and camera preview is shown. When users click on dpad center, camera takes picture and save it to the disc. Pretty simple and straightforward. Everything works fine on my device - HTC Tattoo, minsdkversion 1.6 ...but when I tested application on HTC Hero minsdkversion 1.5, when camera preview is shown,some strange lines occur. Anyone has idea what is going on? p.s. altough preview is crashed, taking of pictures works fine here is the picture: Thanx Marko

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  • how to add multiple widgets in one app?!!

    - by BarcaDroid
    Hello, I've just finished my Android widget. Now I need to have different sizes of this wiget for the user to choose from. for example I need a medium, small and large size widget. so when the user install the app and hold the the home screen then choose widget, in the widget menu I want him to see three widget with the same app name but with the size. something like this: helloSmall helloMedium helloLarge I have the medium one ready but how can I make the small and the large in the same app? knowing that all three sizes contain the same exact data and actions just the size and the background are different. Thanks.

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  • Not able to update contact name in emulator 2.1

    - by Rishabh
    Hi, I am tring to update name of existing contact in android 2.1 emulator with the following code but always getting "java.lang.IllegalArgumentException: Emplty values" Exception. ContentValues contactValues = new ContentValues(); contactValues.put(People.NAME, "rishabh"); getContentResolver().update(UpdateContactUri, contactValues, null, null); UpdateContactUri is the uri of existing contact with id 4. It is working on emulator 1.6 but not on 2.1. One more thing i need to ask how can i access indivisual fields of Name(first, middle, last) and Address(Street, city, state, zip, country) in 2.1

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  • Writing Device Drivers for Microcontrollers, where to define IO Port pins?

    - by volting
    I always seem to encounter this dilemma when writing low level code for MCU's. I never know where to declare pin definitions so as to make the code as reusable as possible. In this case Im writing a driver to interface an 8051 to a MCP4922 12bit serial DAC. Im unsure how/where I should declare the pin definitions for The CS(chip select) and LDAC(data latch) for the DAC. At the moment there declared in the header file for the driver. Iv done a lot of research trying to figure out the best approach but havent really found anything. Im basically want to know what the best practices... if there are some books worth reading or online information, examples etc, any recommendations would be welcome. Just a snippet of the driver so you get the idea /** @brief This function is used to write a 16bit data word to DAC B -12 data bit plus 4 configuration bits @param dac_data A 12bit word @param ip_buf_unbuf_select Input Buffered/unbuffered select bit. Buffered = 1; Unbuffered = 0 @param gain_select Output Gain Selection bit. 1 = 1x (VOUT = VREF * D/4096). 0 =2x (VOUT = 2 * VREF * D/4096) */ void MCP4922_DAC_B_TX_word(unsigned short int dac_data, bit ip_buf_unbuf_select, bit gain_select) { unsigned char low_byte=0, high_byte=0; CS = 0; /**Select the chip*/ high_byte |= ((0x01 << 7) | (0x01 << 4)); /**Set bit to select DAC A and Set SHDN bit high for DAC A active operation*/ if(ip_buf_unbuf_select) high_byte |= (0x01 << 6); if(gain_select) high_byte |= (0x01 << 5); high_byte |= ((dac_data >> 8) & 0x0F); low_byte |= dac_data; SPI_master_byte(high_byte); SPI_master_byte(low_byte); CS = 1; LDAC = 0; /**Latch the Data*/ LDAC = 1; }

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