Android :: What Is Best Way To Handle Images?
Jul 29, 2010
I wrote a application that load images from facebook and i show in lmageview, using this below code. InputStream object = myDataFromServer; Bitmap bmpImage= BitmapFactory. decode Stream (object);imageView. setImage Bitmap(bmpImage);it works fine for me. But the trouble is when i run my application for a longer time, it gives me error, OutofMemoryError, and becuse of this error my application crash. so want to know is there any better way to handling images
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Nov 2, 2009
I'm basically using the same method of loading bitmaps in OpenGL that the SpriteMethodTest example uses and have been unable to get rid of an annoying outline that appears around all of my images.
For example, If I were to load an image of a white circle on a white background, I would expect to see nothing. Instead, I would see my circle because its edge would be gray. In SpriteMethodTest, I replaced the background image with white and was able to see that the edges of the android images flying around also don't seem to be rendered correctly.
Does anyone know how to load images in OpenGL without having a thin outline appear around the images?
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Apr 6, 2010
I'm working to convert some background images to nine patch so they scale better on different phones.
The problem is that if I have the following resource structure: drawable-hdpi/background.png drawable-hdpi/button.png drawable-mdpi/background.png drawable-mdpi/button.png drawable-ldpi/background.png drawable-ldpi/button.png and then I drop a new drawable-hdpi/background.9.png file into the mix, it breaks button.png during the pre-compile. The error is "No resource found that matches the given name (at 'background' with value '@drawable/button').Simply removing that one nine patch file fixes the build. Should I be able to have some nine patch images and some normal ones, or to have nine patch only in hdpi but not mdpi or ldpi? This is Eclipse 3.5.1 with the latest ADT.
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Jul 18, 2010
Just curious how many have this issue.If you are unsure select the link below and find out pls.
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Jun 23, 2010
1.myJpegFile = new File("images/jpegImage.jpg");
2.output = new BufferedOutputStream(new FileOutputStream(myJpegFile));
3.encoder = JPEGCodec.createJPEGEncoder(output);
4.encoder.encode(myJpegImage); Please could you give me the equivalent code for line no. 3 and 4 in Android?
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Mar 24, 2009
Here I have one question about I want to get the handle for one popup dialog, such as, there is one "Delete" alertDialog pop up when you want to delete one picture. So could anyone have the good idea about this?
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May 24, 2009
I'm using a mediaPlayer to play sounds in my application. I want the user to be able to adjust the volume by using the hardware buttons on the device. I tried putting this in my oncreate (setVolumeControlStream (AudioManager.STREAM_MUSIC);) but it didn't seem to work. Is there something else I have to do to allow the user to be able to adjust the volume?
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Oct 25, 2010
I need to handle home button, redirection of home button on customize way.
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Dec 14, 2009
I was wondering whether Androd can catch simultaneous Key Press. For example, a application does something when a user press HOME and MENU key simultaneously. Is it a possible scenario?
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Aug 9, 2010
I am writing an activity, that loads data from a server and displays it as a list using ArrayAdapter. For that I'm showing a progress dialog i.e loading, while it loads all data from the server. Then i dismiss the dialog in a handler. My problem is that when ever i change the orientation, the progress dialog is again shown, which is not needed, because all the data is displayed already?
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Nov 10, 2008
I briefly owned a blackberry not too long ago so that I could handle work e-mail on the go. However, I was disappointed with its e-mail capabilities (or lack thereof) and quickly got rid of it.Due to the nature of my work, I use several different e-mail accounts and I need to be able to access them using imap so that when I move or delete an e-mail locally, it gets updated on the server. Can the G1 accommodate this? For each e-mail account, can you specify things like imap and smtp server?I use a gmail account, a google apps account and three other accounts with other e-mail providers.
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Nov 24, 2010
I want to place three button images of same size equal to screen it is working fine in size 320 x 480,it occupies full 320 size but android is having different resolutions of phones of different sizes 480 x 800 and 240 x 320 how I has to place same image for all resolutions equally to occupy full screen ?
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Dec 16, 2009
I have a Droid Eris, and I haven't really set it up for email yet. I don't need it too badly, as I use my computer for email, but it might be nice on occassion.I'm wondering if some folks can lend some advice on the best way to have a good working email setup between your phone and your computer, if you don't have IMAP as an option, and don't really use Gmail?I use Earthlink for my main email addresses, and I don't believe they support IMAP, so that's not really an option for me.
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Aug 10, 2010
My android application displays webpages(i used webview for it). .but javascript onthe wepage is not running in a webview .If i visit the same webpage through the Browser,javascript is running . How to run javascript in an application(using a webview)?
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Dec 23, 2009
I need a way of deleting if my app is been uninstalled. Is this possible? I need to change some data in the database if my app is uninstalled.
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Sep 8, 2010
How to handle Home key....Plzz Help me out.We can handle Home button.if you have seen the Nexus One device...when u reset the phone ..and switch it on again some tutorials kind of thng comes..at that time wen u press the home button its not taking u to the Launche Activity...if its not possible then how they are handling over there.I want the Answer..No one in this Blog has any idea how to handle it....or no one has tried on this..sum are sayng that we can handle it by PhoneWindowManager.java class,some r sayng we can handle it by Using onNewINtent() method.But the Question is how we can handle it by these two ways...Just provide me the sample code..where we are handling the HomeKey.
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Sep 22, 2010
My app connects to the net and populates a ListView. Sometimes nothing will be returned. What is the best way to notify the user the list is empty?
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May 6, 2010
I know Android cannot handle PDFs natively. However, the Nexus One (and possibly other phones) come pre-Installed with QuickOffice Viewer. How would I determine whether the user has a PDF viewer installed?
Currently, the code to start the PDF download looks pretty simple:
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
After the download, the user clicks on the downloaded file to invoke the viewer.
However, if there is no PDF viewer, Android reports "Cannot download. The content is not supported on the phone."
I want to determine if the user will get this message, and if so, direct them to PDF apps in the Android Market.
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Apr 9, 2010
Is there any "best practice" to deal with plural messages? code...
How could that be done?
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Oct 4, 2010
Maybe some of you has an application with quotations or jokes or something. I would like to make a similar. So how can I get the i. element of my string array (which is in arrays.xml)? I don't want to load the whole array in a String[], because it can be too big. Or it's not a good idea to put them into arrays.xml? How do you handle thousands of strings?
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Jul 28, 2010
I see that as of API Level 8, you can request a handle to special directories with Environment.getExternalStoragePublicDirectory. This takes a type such as DIRECTORY_MUSIC, DIRECTORY_PICTURES, etc.
I'm looking for an equivalent directory for other media types such as documents (Word docs, PDFs, etc.). My HTC Desire has a "/sdcard/My Documents/" folder which looks like exactly what I want, but it has no DIRECTORY_ specifier for use with the above method. Is this a standard Android directory which I can rely on?
If I can't use getExternalStoragePublicDirectory, I have to use getExternalStorageDirectory instead which just points me to the root of the SD card. I can explicitly check for the presence of "My Documents" under the root and use it if it's there.
This is what I have:
CODE:..........
Is there a better way?
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Sep 23, 2009
I know that by default a screen orientation change destroys and recreates an activity, so the activity can load new layout, drawable, and string resources.
I also read about using onRetainNonConfigurationInstance() to save an Object before rotating and getLastNonConfigurationInstance() to restore it after.
But realistically, what are the special cases when an app would use android:configChanges="orientation|keyboard|keyboardHidden" to avoid activity recreation during orientation change? Are there any gotchas involved in using configChanges?http://developer.android.com/reference/android/app/Activity.html#Conf...
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Jan 21, 2010
I want to set an alarm in my application which will be triggered each day. According to the doc, I have to set a one-time alarm, and in the BroadcastReceiver which will receive the alarm signal, reset the alarm for the day after. Is that correct ?
My BroadcastReceiver handles well the wakelock and launch a service which releases this wakelock. Everything works fine here.
However I have problems. In my application there is a checkbox which is checked when alarm is up. To know if my alarm is up, I use the following condition :
CODE:...................
But this doesn't seem to work very well, is that a good way to know if an alarm is up ?
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Apr 26, 2010
I'm developing an media player application for Android, for which I need to handle any Alarm notification, and based on that I'll pause my playback. When the Alarm in snoozed or dismissed, I'll then resume the playback.
I googled a lot for the Alarm handling, but what I found was the way to enable Alarm notifications through code, set the intent and then handle it. However, no where could I locate just handling the Alarm notification part. I don't need to set the Alarm on, it could've been set by the user, and I don't need to programmatically. All I need is just handle that notification.
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Sep 13, 2010
I have an Activity that will query a RESTful API every x seconds (polls using a handler). The results of the GET are used to update a ListView. This is done using an AsyncTask.
I want to put a Notification in the Notification bar when certain criteria are met in the new data. Everything I have read up to this point has suggested that notifications should be created and updated using a service so that the notifications can be made even when the application isn't in focus. I see the positive aspects of this.
However, I'm unsure if I should just create a service from within my activity or if I need to do something more complex than that. I'm undecided on if I should scrap my AsyncTask model in favor of using the Service to update my list view.
So, my questions are:
1) Is there a good tutorial showing how to make a local service from an activity?
The tutorial doesn't need to show how to make them communicate, the service could be isolated from the main activity.
2) Will #1 provide me with the notification benefits I'm looking for? (Notifications are generated even when the main app isn't visible)
3) Should I use this same service to update my listview?
The service would basically be making the same query that the AsyncTasks are, just doing different things with the results. The app would seem to make more sense to have the Service query, do notification processing, then give the results to the activity, but I haven't found a good resource that clearly demonstrates how to do something like this.
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Jun 4, 2009
Im using a mediaPlayer to play sounds in my application. I want the user to be able to adjust the volume by using the hardware buttons on the device. I tried putting this in my oncreate (setVolumeControlStream (AudioManager.STREAM_MUSIC);) but it didnt seem to work. Anytime i press the hardware buttons on the emulator or an actual phone hothing happens. the volume doesnt change and i dont see the volume leve appear on the screen. Every other app i have used works just fine except for mine. Is there something else I have to do to allow the user to be able to adjust the volume using the hardware buttons?
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Oct 5, 2010
I am trying to implement smth like context menu but with icons ..
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Jul 9, 2010
I want to disable the view change on device rotation for the time being. Its giving foreclose error when i rotate the device and starts all over again.
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Jun 8, 2010
I have just gotten my first Android based device, the HTC Droid Incredible.
I am not new to the world of smartphones (I have owned a Blackberry and have worked on many other Blackberries), but I am new to the whole world of Android.
I really do like it so far, but I have a question...
How does Android handle data? What I mean by this question is this: Does Android use a store and forward approach to sending data (emails)? Or does it send it out and if it doesn't have a good connection, it will just fail out, never to try again?
And based on the fact that it uses data, I also assume that it will never lose it's data connection even though a cell phone tower might be buried under voice calls?
The reason I ask this is because during 9/11, many people's cell phones could not make or receive calls but those who had some of the first Blackberries were able to send and receive emails just fine due to the store and forward approach.
Also, another reason is that this device will be used in a SHTF type of situation due to it's capabilities and I want to make sure that it will work with data (sending emails), although I may not be able to make voice calls with it.
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Jun 14, 2010
I am using following code to display bitmap in my imageview.
when i try to load image of size for example bigger than 1.5MB it give me error
any one suggest me solution? code...
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