2014/10/16 上午 08:10:59
android Programming Glossary: calculationsHow do I make global changes throughout my app in Android? http://stackoverflow.com/questions/10599775/how-do-i-make-global-changes-throughout-my-app-in-android my app to use the chosen units throughout in display and calculations. I plan to do this by storing a boolean in sharedpreferences..
Android OpenGL ES 2.0 screen coordinates to world coordinates http://stackoverflow.com/questions/10985487/android-opengl-es-2-0-screen-coordinates-to-world-coordinates I make the Model Matrix an identity matrix before these calculations Matrix.setIdentityM mModelMatix 0 As a follow up if this is..
How to measure the speed of car by phone with accelerometer and gyroscope? http://stackoverflow.com/questions/13285677/how-to-measure-the-speed-of-car-by-phone-with-accelerometer-and-gyroscope in relation to the car will increase even more the calculations and accumulated errors . Regards. share improve this answer..
Android Compass that can Compensate for Tilt and Pitch http://stackoverflow.com/questions/16317599/android-compass-that-can-compensate-for-tilt-and-pitch is how accurate each sensor is. In any case with all the calculations explicitly visible in this code if there are instability problems..
TileProvider method getTile - need to translate x and y to lat/long http://stackoverflow.com/questions/16883997/tileprovider-method-gettile-need-to-translate-x-and-y-to-lat-long tile for a specified lat long. I've tried reversing the calculations of MaciejG籀rski's and marcin's answer with no luck. public static..
How to make a splash screen (screen visible when app starts)? http://stackoverflow.com/questions/2222890/how-to-make-a-splash-screen-screen-visible-when-app-starts advantage of using a splash screen when performing lengthy calculations on start up. Here's an excerpt from the Android Developer Website..
What's a good library for parsing mathematical expressions in java? [closed] http://stackoverflow.com/questions/2226863/whats-a-good-library-for-parsing-mathematical-expressions-in-java is like 'x' instead of '# x ' calling it for numeric calculations is simpler JEval seems to need to convert to from strings if..
Android: ProgressDialog doesn't show http://stackoverflow.com/questions/2798443/android-progressdialog-doesnt-show pd.setCancelable false now fetch the results ...long time calculations here... remove progress dialog pd.dismiss I've also tried adding..
How is location accuracy measured in Android? http://stackoverflow.com/questions/3052517/how-is-location-accuracy-measured-in-android circle something else In addition what are the actual calculations that are used and how much can we rely on them Does it depend..
java events,handlers and listeners question http://stackoverflow.com/questions/4818851/java-events-handlers-and-listeners-question and starts receiving data DataRobot this class performs calculations on the data that is received and decides what to do with it..
Error in xml layout, Can't convert to dimension: 15 http://stackoverflow.com/questions/5293558/error-in-xml-layout-cant-convert-to-dimension-15 going to guess the error is caused by some of the scaling calculations in the graphical renderer. But it's not worth researching to..
Get view width/height or font width/height/other sizes before first display http://stackoverflow.com/questions/5375631/get-view-width-height-or-font-width-height-other-sizes-before-first-display sizes before first display I know that doing view size calculations for placement is frowned up. Android layout managers should.. However there are some legitimate cases when some sort of calculations should be done in order to provide hints ex. number of columns..
Running a repeating task in background on a real time application [duplicate] http://stackoverflow.com/questions/5774092/running-a-repeating-task-in-background-on-a-real-time-application data into the database in the device. I need to make some calculations every X second with that data and throw a new event if the calculations.. every X second with that data and throw a new event if the calculations check says so. I'm thinking about requesting to have the device.. the best approach for the task that needs to make the calculations and throw the event Timer Threads AsynkTask AlarmManager Another..
Moving an image using Accelerometer of android http://stackoverflow.com/questions/6457768/moving-an-image-using-accelerometer-of-android after you intialized that class. You'll have to do some calculations to set the balls location properly. The way you were doing it..
Is it safe when compare 2 float/double directly in Java? http://stackoverflow.com/questions/6786254/is-it-safe-when-compare-2-float-double-directly-in-java because it does not take account of the way that certain calculations cause the errors to build up to unmanageable proportions. Take.. bottom line is that dealing with errors in floating point calculations is a lot more difficult than it appears at first glance. The..
Is it possible to dynamically load a library at runtime from an Android application? http://stackoverflow.com/questions/6857807/is-it-possible-to-dynamically-load-a-library-at-runtime-from-an-android-applicat an example Imagine that the application needs to make some calculations depending on the input values. The application asks for these..
How do I make global changes throughout my app in Android? http://stackoverflow.com/questions/10599775/how-do-i-make-global-changes-throughout-my-app-in-android user selects one of these in the options in the menu I want my app to use the chosen units throughout in display and calculations. I plan to do this by storing a boolean in sharedpreferences then check the value of the boolean every time an activity..
Android OpenGL ES 2.0 screen coordinates to world coordinates http://stackoverflow.com/questions/10985487/android-opengl-es-2-0-screen-coordinates-to-world-coordinates to utilize this method Does it work for OpenGL ES 2.0 Should I make the Model Matrix an identity matrix before these calculations Matrix.setIdentityM mModelMatix 0 As a follow up if this is correct how do I pick the output Z Basically I always know at..
How to measure the speed of car by phone with accelerometer and gyroscope? http://stackoverflow.com/questions/13285677/how-to-measure-the-speed-of-car-by-phone-with-accelerometer-and-gyroscope
Android Compass that can Compensate for Tilt and Pitch http://stackoverflow.com/questions/16317599/android-compass-that-can-compensate-for-tilt-and-pitch so if the azimuth seems unstable another thing to check is how accurate each sensor is. In any case with all the calculations explicitly visible in this code if there are instability problems when the sensor accuracy is reasonable then they could..
TileProvider method getTile - need to translate x and y to lat/long http://stackoverflow.com/questions/16883997/tileprovider-method-gettile-need-to-translate-x-and-y-to-lat-long clarify I need a function to return the x y coordinates of the tile for a specified lat long. I've tried reversing the calculations of MaciejG籀rski's and marcin's answer with no luck. public static Point fromLatLng LatLng latlng int zoom int noTiles 1..
How to make a splash screen (screen visible when app starts)? http://stackoverflow.com/questions/2222890/how-to-make-a-splash-screen-screen-visible-when-app-starts share improve this question Android suggests you take advantage of using a splash screen when performing lengthy calculations on start up. Here's an excerpt from the Android Developer Website Designing for Responsiveness If your application has a..
What's a good library for parsing mathematical expressions in java? [closed] http://stackoverflow.com/questions/2226863/whats-a-good-library-for-parsing-mathematical-expressions-in-java error messages or at least tries to the syntax for variables is like 'x' instead of '# x ' calling it for numeric calculations is simpler JEval seems to need to convert to from strings if I understand it right it has the ^ exponentiation operator..
Android: ProgressDialog doesn't show http://stackoverflow.com/questions/2798443/android-progressdialog-doesnt-show pd.setMessage Working... pd.setIndeterminate true pd.setCancelable false now fetch the results ...long time calculations here... remove progress dialog pd.dismiss I've also tried adding pd.show and messed around with the parameter in new ProgressDialog..
How is location accuracy measured in Android? http://stackoverflow.com/questions/3052517/how-is-location-accuracy-measured-in-android radius of a 50 confidence circle Radius of 95 confidence circle something else In addition what are the actual calculations that are used and how much can we rely on them Does it depend on the source of the location estimate GPS vs. network Many..
java events,handlers and listeners question http://stackoverflow.com/questions/4818851/java-events-handlers-and-listeners-question the UI Connect this class performs a connection to a socket and starts receiving data DataRobot this class performs calculations on the data that is received and decides what to do with it DataBuilder this class gathers the data from the datarobot and..
Error in xml layout, Can't convert to dimension: 15 http://stackoverflow.com/questions/5293558/error-in-xml-layout-cant-convert-to-dimension-15
Get view width/height or font width/height/other sizes before first display http://stackoverflow.com/questions/5375631/get-view-width-height-or-font-width-height-other-sizes-before-first-display view width height or font width height other sizes before first display I know that doing view size calculations for placement is frowned up. Android layout managers should place all views properly. However there are some legitimate.. up. Android layout managers should place all views properly. However there are some legitimate cases when some sort of calculations should be done in order to provide hints ex. number of columns in a GridView or sizing a text view to allow a minimum number..
Running a repeating task in background on a real time application [duplicate] http://stackoverflow.com/questions/5774092/running-a-repeating-task-in-background-on-a-real-time-application checking the sensors almost all available and saving that data into the database in the device. I need to make some calculations every X second with that data and throw a new event if the calculations check says so. I'm thinking about requesting to.. database in the device. I need to make some calculations every X second with that data and throw a new event if the calculations check says so. I'm thinking about requesting to have the device plugged in while using the application regarding battery.. in while using the application regarding battery drain . What's the best approach for the task that needs to make the calculations and throw the event Timer Threads AsynkTask AlarmManager Another approach I want to keep getting sensors data and saving..
Moving an image using Accelerometer of android http://stackoverflow.com/questions/6457768/moving-an-image-using-accelerometer-of-android this code. You were never setting the location of the drawable after you intialized that class. You'll have to do some calculations to set the balls location properly. The way you were doing it was getting values over 10000 which was drawing the oval off..
Is it safe when compare 2 float/double directly in Java? http://stackoverflow.com/questions/6786254/is-it-safe-when-compare-2-float-double-directly-in-java enough to be equal But even this is not the complete answer because it does not take account of the way that certain calculations cause the errors to build up to unmanageable proportions. Take a look at this Wikipedia link for more details. The bottom.. Take a look at this Wikipedia link for more details. The bottom line is that dealing with errors in floating point calculations is a lot more difficult than it appears at first glance. The other point to note is as others have explained integer arithmetic..
Is it possible to dynamically load a library at runtime from an Android application? http://stackoverflow.com/questions/6857807/is-it-possible-to-dynamically-load-a-library-at-runtime-from-an-android-applicat to download and use a Java library at runtime Here is an example Imagine that the application needs to make some calculations depending on the input values. The application asks for these input values and then checks if the required Classe s or Method..
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