Android :: SeekBar Minimum And Continuous Float Value Attributes
Jun 9, 2010
I'm looking for a way to implement a minimum value in my SeekBar and also have the option to increment decimal numbers. For example, currently my SeekBar's minimum is set to 0, but I need it to start at the value 0.2. Also, I would like to have the functionality to be able to have the user select a number from 0.2 to 10.0 at a .1 precision so they can choose the numbers 5.6 or 7.1.
Here are the style attributes for my SeekBar:
CODE:..............
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Jun 13, 2010
Does anyone know how to define a SeekBar's minimum value? Is this done in the XML layout or do I need to define it programatically?Basically I need to change my minimum value from 0 to 0.2
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Jun 13, 2009
I am using SeekBar in my application, currently seek bar minimum value is zero, but as per application requirement seek bar value should not be zero. how to set minimum value for SeekBar.
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Aug 16, 2010
I want to give max and minimum limit of seekbar to 50 and 20 respectively. Seekbar has a direct option top provide max value,but how can i set its minimum value to 20 rather than 0?
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Jul 18, 2009
Double mChange = Double.parseDouble("7.1") - Double.parseDouble ("7.15"); Float mChange = Float.parseFloat("7.1") - Float.parseFloat("7.15"); mChange should be -0,05 in both cases, right? So why is mChangeD = -0.05000019 ???
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Jul 8, 2010
I have a JSON Object with a latitude and longitude String on which I get the values doing this: String latitude = picInfo.getString("latitude"); String longitude = picInfo.getString("longitude");Then I convert them to floats like this: float latInt = Float.valueOf(latitude).floatValue(); float longInt = Float.valueOf(longitude).floatValue();And place them on a GeoPoint like this: GeoPoint X = new GeoPoint((int) (latInt*1E6),(int) (longInt*1E6) ); Debugging this values I can see JAVA approximates the values, is there anyway to keep them exactly the same?
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Nov 19, 2010
I have an EditText for which will be using for a float number. So I'm trying to read the text from the EditText and put it into a float variable. But I seem to have a text to float problem.I've tried using Float.parseFloat(string) and just general casting, but nothing seem to do it. What can I do here? Also, is there a way to check for a valid float number before writing it to a variable?
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Jun 8, 2010
I've read this in a few articles, that one should avoid floating point operations within the physics update of a game.
But how do you really achieve this? Surely all half decent games are going to involve this kind of maths?
Does it mean, convert all your variables to int, or use double instead, or simply just cut it out as much as possible?
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Jun 19, 2010
Does anyone know how to get user input for floats,doubles,ints. I have tried looking everywhere on here and there hasn't been anything that could help me. All it has is EditText.GetText().toString() very frustrated that there isn't a tutorial for this.
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Apr 27, 2010
So I have an app where I put arbitrary strings in a database and later extract them like this:
CODE:......................
This works fine in all cases except for when the string looks like a float number, for example "221.123123123". After saving it to the database I can extract the database to my computer and look inside it with a DB-viewer, and the saved number is correct. However, when using cursor.getString() the string "221.123" is returned. I cant for the life of me understand how I can prevent this. I guess I could do a cursor.getDouble() on every single string to see if this gives a better result, but that feels sooo ugly and inefficient.
I just made a small test program. This program prints "result: 123.123", when I would like it to print "result: 123.123123123"
CODE:.................
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Dec 3, 2009
Reading values like integers, strings, colors, etc. from resources (xml files) is easy and well defined at http://developer.android.com/guide/topics/resources/available-resourc.... But what about a float value, like 0.1 or 1.4? How can such float value be defined in resource file and accessed from code? Is it possible at all?
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Apr 13, 2009
In my ListView, there's one line of code in my ViewBinder that causes lots of garbage collection as I scroll through the list, about every two seconds...
D/dalvikvm(16312): GC freed 13171 objects / 659576 bytes in 162ms D/dalvikvm(16312): GC freed 13122 objects / 654128 bytes in 129ms D/dalvikvm(16312): GC freed 13134 objects / 655416 bytes in 142ms D/dalvikvm(16312): GC freed 13129 objects / 654840 bytes in 129ms D/dalvikvm(16312): GC freed 13149 objects / 655000 bytes in 110ms D/dalvikvm(16312): GC freed 13150 objects / 655720 bytes in 127ms D/dalvikvm(16312): GC freed 13075 objects / 652256 bytes in 111ms D/dalvikvm(16312): GC freed 13232 objects / 659040 bytes in 136ms D/dalvikvm(16312): GC freed 13106 objects / 653920 bytes in 110ms D/dalvikvm(16312): GC freed 13155 objects / 655152 bytes in 110ms
The offending code is here, which formats a price for each item in the list: String price = cursor.getString(columnIndex); final float pricef = Float.parseFloat(price); price = new StringBuffer("$").append(String.format("%. 2f",pricef)).toString(); ((TextView)view).setText(price);
If I comment out the line with String.format, the garbage collection goes away. So what's the "right" way to do this to avoid allocations? That database field holds an unformatted text string which I'm trying to format into proper currency format (example: format "1.5" to "$1.50")
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Dec 4, 2012
I'm writing a game using Surfaceview and have a question relating to saving Data into a Bundle.
Initially, I had an arraylist which stored the Y co-ordinates (in the form of Integers) of sprites that will move only up and down. Declared as:
Quote:
static ArrayList<Integer> ycoordinates = new ArrayList<Integer>();
I saved them to a Bundle using the following:
Quote:
myBundle.putIntegerArrayList("myycoordinates", ycoordinates);
And restored them using this:
Quote:
ycoordinates.addAll(savedState.getIntegerArrayList ("ycoordinates"));
This all worked perfectly. However, I've had to change the whole coordinates system so it's based on Delta time to allow my sprites to move at a uniform speed across different screens. This is, again, working perfectly.
However, as a result of this change, I now have to store these values as floats rather than integers.
So, I am declaring as:
Quote:
static ArrayList<Float> ycoordinates = new ArrayList<Float>();
So that's the background, now my question is, how do I store and restore values from a Float Arraylist? There doesn't seem to be a "putFloatArrayList" or "getFloatArrayList".
(I've used an Arraylist rather than an Array as the number of sprites needs to be dynamic).
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Feb 8, 2010
Has anyone found a video player that automatically plays the next video when the first video ends like episodic videos?
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Dec 29, 2009
I am trying to play raw audio samples ( 16 bit, stereo, @ 32000KHz) using AudioTrack, in "MODE_STREAM" mode. I could play the first video buffer successfully but, After having received "onMarkerReached" for that raw audio buffer, I wonder how to push more audio data in AudioTrack ? without closing/stopping it. Writing more data to AudioTrack in "onMarkerReached" callback does not help. I am using the same thread to construct the AudioTrack and pump in audio - buffers and receive callbacks.
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Dec 7, 2009
In my application, I don't want the activity to restart when user changes his mobile's orientation or when he opens his physical keyboard.So, I have to assign the following XML attribute to all my activities in the manifest file.Is it possible to assign the same XML attribute value to all activities ? Or should I copy the attribute in all the <activity> tags of the manifest?
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Nov 5, 2009
I met a problem in setting xml attribute at run time.
For example I define a xml layout like this:
CODE:.......................
I want to set android:drawableLeft="@drawable/icon" at runtime.But thers has no setter method for this attribute.
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Aug 23, 2010
what are these clouds that float by on my screen every time I turn on the Droid? Did I miss something somewhere, is it a android thing or my weather program? How can I turn it off?
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Jul 26, 2010
What's the minimum memory needed to run a RAR decompression algorithm? I want to port a RAR decompression algorithm to mobiles (iPhone, Android and BlackBerry) and want to know if there's a bare minimum of memory needed before starting. I've heard that RAR decompression requires much more memory than ZIP decompression.
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Jul 17, 2010
I own a samsung moment which was rooted about a month+ ago. I started receiving an error message randomly today from HelixLauncher: The application HelixLauncher (process com.helixproject.launcher) has stopped unexpectedly. Please try again. It prompts me to force close then I receive the same error message yet again. I cannot access anything on my phone as this error message renders anything on the phone almost completely inaccessible. I don't understand why I've randomly gotten stuck with this error message. I'm guessing my only option is a hard reset/safemode reboot and eventually re-root; this application seems to fuel a large part of the current 'root' I am running.
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Jan 6, 2010
I'm trying to write an App that continuously record audio in memory (in a circular buffer).
Could anyone point me towards a piece of code (perhaps in the kernel) that shows how to best to this?
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Sep 26, 2010
I use custom xml attributes for preferences. The preferences are inflated from xml.I managed to create and read custom xml attributes for EditTextPreference, ListPreference and CheckBoxPreference by creating custom classes which inherit from the respective preference class.My problem is that I can't do this for the PreferenceScreen class, as it is a final class. So my question is: Is there any way I can read the custom attributes of a PreferenceScreen?
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Feb 5, 2010
can i affect the look of the dropshadow that the scroll view shows when there's "more" available via scrolling? i'm not seeing anything in the scrollview docs.
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Aug 29, 2009
Can u tel me what are the attributes we want to specify in the <scrollview> xml file.... bcoz i want to display scrollbar n my layout...i tried scrollview but it shows an error like force to close....
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Nov 26, 2009
Is it possible to define an attribute value of a height attribute, for example, relative to its parent's height. For instance, I want the linear_layout's height to be 2/3 of its FrameLayout parent. I have a FrameLayout with two linear_layouts. The first linear_layout fills the entire FrameLayout and the second linear_layout overlaps the first but only 2 / 3 of its height.
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Jan 22, 2010
I have downloaded a media file. (say mp3 file). I need to get the attributes of the file, like ARTIST, TITLE etc.
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Sep 12, 2010
I am desperately trying to set TextView attributes of cells within a table programmatically but can't get this to work! Whenever I set layout properties, the field will simply not appear (but not give any error or exception). I boilded this down to this simple example:
CODE:.......
This will show three fields, but when you uncomment the five commented line, then NOTHING will appear. Why is that so? Why does setting layout parameters cause my TextView's to not appear? I'm stuck! What am I missing?
Here's the manifest, if some kind soul quickly wants to try this out:
CODE:.....................
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Apr 4, 2010
I simply need to add floatArray1 to floatArray2 storing the result in floatArray2.. no third array. all arrays are one dimensional but are very large. probibly as large as the os will let me get away with. Max i would need is two float arrays with 40,000 floats each. but i could get away with 1/10th that i suppose minimum.Would love to do this in 1/30th or 1/60th of a second but that does not seem possible? Also if the code is JNI,NDK or OpenGL ES thats fine. does android have an assembly language or like machine code i could use somehow?
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Mar 3, 2010
I could set minimum heap size in the source code like below.
--> VMRuntime.getRuntime().setMinimumHeapSize(INITIAL_HEAP_SIZE);
But I want to set this value in android.mk or androidmanifest.xml.
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Oct 7, 2009
We're seeking advice for our application in the Android Market, in relation to nominating a suitable minimum SDK version for the APK files published through the market. We understand that at this juncture there's no facility to provide associate multiple APK files (supporting different minimum SDK versions) within a single listing in the Market.
We have updated our existing application with new Android 1.6 API features and are keen to release it to the Market. However we're concerned about the general availability (and uptake) of version 1.6 firmware and seeking to ensure that we don't inadvertently release an updated APK should there be limited release of this firmware.
Can anyone provide an indication as to how widely the 1.6 firmware has been released? To that end, what are generally acceptable practices for supporting multiple SDK versions from within the market?
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