I just ran into an issue while trying to write an bitmap-manipulating algo for an android device. I have a 1680×128 pixel Bitmap and need to apply a filter on it. But this very simple code-piece actually took almost 15-20 seconds to run on my Android device (xperia ray with a 1Ghz processor). So I tried to find the bottleneck
Tag: android
Android : How to read file in bytes?
I am trying to get file content in bytes in Android application. I have get the file in SD card now want to get the selected file in bytes. I googled but no such success. Please help Below is the code to get files with extension. Through this i get files and show in spinner. On file selection I want
JAVA_OPTS for increasing heap size
I want to increase my Heap size. How can I use JAVA_OPTS for doing so.I am getting the following error may be this is because of low heap size Answer You should be able to use the information found in this post. where zzz is your minimum size. where zzz is your maximum size. You can find more info on
Java for Android – how to create event listener for boolean variable
I am creating an android application using Java. I have a boolean variable called “movement”. I want to create an event that triggers when the value of “movement” changes. Any pointers in the right direction would be great. Thank you Answer A variable is not alone, I presume. It resides as a member in a class – right? So the
Prevent the keyboard from displaying on activity start
I have an activity with an Edit Text input. When the activity is initialized, the Android keyboard is shown. How can the keyboard remain hidden until the user focuses the input? Answer I think the following may work I’ve used it for this sort of thing before.
android – How to detect application being activated
When the app is launched, Application onCreate is called. How to detect when the app is brought to front from running in background? Answer Look for onResume() method. Its is always called when your app comes foreground. As per google docs: The foreground lifetime of an activity happens between a call to onResume() until a corresponding call to onPause(). During
How to avoid Admob blocking the UI thread
I have detected some of my activities are blocked at the launch. So I wrote that code in a new project: And the result is that the first creation of an AdView object blocks the UI thread for between 1 and 2 seconds. Is there some way of avoiding that? Thanks Answer You are creating your AdView in your UI
How to change spaces to underscore and make string case insensitive?
I have following question. In my app there is a listview. I get itemname from listview and transfer it to the webview as a string. How to ignore case of this string and change spaces to underscores? For example: String itemname = “First Topic”. I transfer it to the next activity and want to ignore case and change space to
Java – Split String into sentences with character limitation
I want to split a text into sentences (split by . or BreakIterator). But: Each sentence mustn’t have more than 100 characters. Example: To: (3 elements, without breaking a word, but a sentence) How can I do this properly? Answer Solved (thank you Macarse for the inspiration):
How to make a copy of a file in android?
In my app I want to save a copy of a certain file with a different name (which I get from user) Do I really need to open the contents of the file and write it to another file? What is the best way …