2014/10/16 上午 08:18:39

android Programming Glossary: math

Create PDU for Android that works with SmsMessage.createFromPdu() (GSM 3gpp)

http://stackoverflow.com/questions/12335642/create-pdu-for-android-that-works-with-smsmessage-createfrompdu-gsm-3gpp

writing my own even though I'm very terrible with the math and conversions and creating a suitable algorithm. I've looked..

MathML and Java

http://stackoverflow.com/questions/1784786/mathml-and-java

and Java I've been doing some research for a mathematical Android related project I'd like to embark upon and.. things Parse MathML Output MathML by parsing standard mathematical notation Render MathML particularly important Do any.. Render MathML particularly important Do any other cool maths ey things like re arrange equations in terms of different things..

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

a good library for parsing mathematical expressions in java closed I'm an Android Developer.. I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java.. a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants..

Get the distance between two geo points

http://stackoverflow.com/questions/2741403/get-the-distance-between-two-geo-points

am worried I need to resort to my calculate and have to do math to calculate it. What do you guys think Cheers and thanks for..

Custom ImageView with drop shadow

http://stackoverflow.com/questions/3693234/custom-imageview-with-drop-shadow

as temporary From what I understand I'll need to do some math to determine the size that the drop shadow adds to the canvas..

Implement page curl on android?

http://stackoverflow.com/questions/3912849/implement-page-curl-on-android

simple substitution but are left separate to keep the math simple for debugging and illustrative purposes. vo outputMesh_.. I can later apply shadows to to gie it more depth android math transition share improve this question I just created a..

Page curl/turn effect in Android [duplicate]

http://stackoverflow.com/questions/4376962/page-curl-turn-effect-in-android

why getSpeed() always return 0 on android

http://stackoverflow.com/questions/4811920/why-getspeed-always-return-0-on-android

calculate the speed using GPS you'll have to do a little math Speed distance time So you would need to do currentGPSPoint..

Store orientation to an array - and compare

http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare

to arrays I would be a happy man Thanks iphone android math artificial intelligence gesture recognition share improve..

Problem to achieve curved animation [duplicate]

http://stackoverflow.com/questions/6849554/problem-to-achieve-curved-animation

that can animate along a curve. If you're good with math and can understand bezier curves then that might be a straight..

How to find absolute position of click while zoomed in

http://stackoverflow.com/questions/8180442/how-to-find-absolute-position-of-click-while-zoomed-in

find a way of getting the absolute position of B. android math zooming share improve this question So after redrawing the..

How to practically display math formula in Android

http://stackoverflow.com/questions/8359032/how-to-practically-display-math-formula-in-android

to practically display math formula in Android I researched on this for quite a while and.. find a right answer showing how to practically deal with math formula in Android app. Without including large amount 5~20MB.. project it seems that there is no way to parse display math formula script like MATHML. I looked at JEuclid and MathJax..

Augmented reality - Image size transform

http://stackoverflow.com/questions/11387535/augmented-reality-image-size-transform

of the view is the arclength of the viewport Step 3 Some Math Let us make another assumption to simplify the process. Lets..

Detect 7 inch and 10 inch tablet programmatically

http://stackoverflow.com/questions/15055458/detect-7-inch-and-10-inch-tablet-programmatically

can work out the smallest width using the min function of Math class passing in the heightDp and the widthDp to return the.. widthDp to return the smallestWidth . float smallestWidth Math.min widthDp heightDp if smallestWidth 720 Device is a 10 tablet.. plus the width in inches squared. double diagonalInches Math.sqrt widthInches widthInches heightInches heightInches From..

Android color picker to be included in the activity

http://stackoverflow.com/questions/16363235/android-color-picker-to-be-included-in-the-activity

32 private int floatToByte float x int n java.lang.Math.round x return n private int pinToByte int n if n 0 n 0 else.. n private int ave int s int d float p return s java.lang.Math.round p d s private int interpColor int colors float unit if.. float y event.getY CENTER_Y boolean inCenter java.lang.Math.sqrt x x y y CENTER_RADIUS switch event.getAction case MotionEvent.ACTION_DOWN..

Display Good-looking Math Formula in Android

http://stackoverflow.com/questions/17029780/display-good-looking-math-formula-in-android

Good looking Math Formula in Android It is sad to see that science and math is.. I just need to use render mathematic equation. It can be MathJax or JqMath or anything that is small and fast. If I have to.. to use render mathematic equation. It can be MathJax or JqMath or anything that is small and fast. If I have to do it in a..

How to use onSensorChanged sensor data in combination with OpenGL

http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl

private int mCount final static float rad2deg float 180.0f Math.PI private boolean landscape public SensorToOpenGlTests Called.. multiplied in x y z order Rx Ry Rz resultingAngles 2 float Math.asin rotationMatrix 2 final float cosB float Math.cos resultingAngles.. 2 float Math.asin rotationMatrix 2 final float cosB float Math.cos resultingAngles 2 resultingAngles 2 resultingAngles 2 rad2deg..

Implement page curl on android?

http://stackoverflow.com/questions/3912849/implement-page-curl-on-android

go about implementing this on android. Could any of the Math gods out there please help me out with how I would go about..

Page curl/turn effect in Android [duplicate]

http://stackoverflow.com/questions/4376962/page-curl-turn-effect-in-android

go about implementing this on android. Could any of the Math gods out there please help me out with how I would go about..

Android Compass orientation on unreliable (Low pass filter)

http://stackoverflow.com/questions/4699417/android-compass-orientation-on-unreliable-low-pass-filter

rotationMatrix values double degrees Math.toDegrees values 0 My problem is that the positioning of the.. i have no idea how to implement this because of my lack of Math . Im hoping someone can help me creating a more steady reading.. affect the current orientation. Right now i do a small if Math.abs lastReadingDegrees newReadingDegrees 1 updatePosition To..

android: camera onPause/onResume issue

http://stackoverflow.com/questions/7935292/android-camera-onpause-onresume-issue

to write stack traces to data anr traces.txt 1 of 3414 Math result not representable 10 28 18 59 46.610 ERROR dalvikvm 3044.. to write stack traces to data anr traces.txt 3354 of 7154 Math result not representable ... Here is my shortened code public..

android: I get no stacktrace, phone just hangs

http://stackoverflow.com/questions/8481402/android-i-get-no-stacktrace-phone-just-hangs

to write stack traces to data anr traces.txt 1 of 3362 Math result not representable 12 17 12 45 08.613 ERROR dalvikvm 10365.. to write stack traces to data anr traces.txt 1 of 2832 Math result not representable 12 17 12 45 08.625 INFO dalvikvm 10731.. to write stack traces to data anr traces.txt 1 of 3867 Math result not representable 12 17 12 45 09.015 INFO dalvikvm 10924..

What's the best practice to round a float to 2 decimals?

http://stackoverflow.com/questions/8911356/whats-the-best-practice-to-round-a-float-to-2-decimals

value to 2 decimals. I usually use the next trick using Math library. float accelerometerX accelerometerX 100 accelerometerX..

Create PDU for Android that works with SmsMessage.createFromPdu() (GSM 3gpp)

http://stackoverflow.com/questions/12335642/create-pdu-for-android-that-works-with-smsmessage-createfrompdu-gsm-3gpp

Research I've been doing research all day night. I've tried writing my own even though I'm very terrible with the math and conversions and creating a suitable algorithm. I've looked over Stack topics on PDUs and Create PDU Android but the..

MathML and Java

http://stackoverflow.com/questions/1784786/mathml-and-java

and Java I've been doing some research for a mathematical Android related project I'd like to embark upon and I stumbled across for the first time MathML. Does anyone know.. Java libraries which can do any preferably all of the following things Parse MathML Output MathML by parsing standard mathematical notation Render MathML particularly important Do any other cool maths ey things like re arrange equations in terms.. MathML Output MathML by parsing standard mathematical notation Render MathML particularly important Do any other cool maths ey things like re arrange equations in terms of different things Number 3 is probably the most important and number 4 the..

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

a good library for parsing mathematical expressions in java closed I'm an Android Developer and as part of my next app I will need to evaluate a large.. closed I'm an Android Developer and as part of my next app I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical.. mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants trig and exponential functions etc. I've looked around and..

Get the distance between two geo points

http://stackoverflow.com/questions/2741403/get-the-distance-between-two-geo-points

position. I could not find anything in the google APIs. I am worried I need to resort to my calculate and have to do math to calculate it. What do you guys think Cheers and thanks for reading or replying. android geolocation maps share improve..

Custom ImageView with drop shadow

http://stackoverflow.com/questions/3693234/custom-imageview-with-drop-shadow

mW 5 mH 5 The 5 in the measurements are there as temporary From what I understand I'll need to do some math to determine the size that the drop shadow adds to the canvas right But when I use this public View getView int position..

Implement page curl on android?

http://stackoverflow.com/questions/3912849/implement-page-curl-on-android

the curled page. These two steps could be combined through simple substitution but are left separate to keep the math simple for debugging and illustrative purposes. vo outputMesh_ ii vo x v1.x cos rho v1.z sin rho vo y v1.y vo z v1.x sin.. diagnally across the page to create a similar effect that I can later apply shadows to to gie it more depth android math transition share improve this question I just created a open source project which features a page curl simulation in..

Page curl/turn effect in Android [duplicate]

http://stackoverflow.com/questions/4376962/page-curl-turn-effect-in-android

why getSpeed() always return 0 on android

http://stackoverflow.com/questions/4811920/why-getspeed-always-return-0-on-android

. This is a value that you can set for a location object. To calculate the speed using GPS you'll have to do a little math Speed distance time So you would need to do currentGPSPoint lastGPSPoint time between GPS points All converted to ft sec..

Store orientation to an array - and compare

http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare

anyone could help me out with the first steps with comparing to arrays I would be a happy man Thanks iphone android math artificial intelligence gesture recognition share improve this question Try dynamic time warping . Here is an illustrative..

Problem to achieve curved animation [duplicate]

http://stackoverflow.com/questions/6849554/problem-to-achieve-curved-animation

write your own animation to create a subclass of TweenAnimation that can animate along a curve. If you're good with math and can understand bezier curves then that might be a straight forward option. Once you have that class you could easily..

How to find absolute position of click while zoomed in

http://stackoverflow.com/questions/8180442/how-to-find-absolute-position-of-click-while-zoomed-in

position relative to 0 0 of the initial canvas. I need to find a way of getting the absolute position of B. android math zooming share improve this question So after redrawing the problem I've found the solution I was looking for. It's gone..

How to practically display math formula in Android

http://stackoverflow.com/questions/8359032/how-to-practically-display-math-formula-in-android

to practically display math formula in Android I researched on this for quite a while and I know this kind of questions already answered. But I couldn't.. know this kind of questions already answered. But I couldn't find a right answer showing how to practically deal with math formula in Android app. Without including large amount 5~20MB of files in the Android project it seems that there is no.. Without including large amount 5~20MB of files in the Android project it seems that there is no way to parse display math formula script like MATHML. I looked at JEuclid and MathJax that were mentioned a lot for Android but I found them in this..

Augmented reality - Image size transform

http://stackoverflow.com/questions/11387535/augmented-reality-image-size-transform

of the object and the size of the view. In this case the size of the view is the arclength of the viewport Step 3 Some Math Let us make another assumption to simplify the process. Lets assume that instead of viewing the real arc we view the hypotenuse..

Detect 7 inch and 10 inch tablet programmatically

http://stackoverflow.com/questions/15055458/detect-7-inch-and-10-inch-tablet-programmatically

if it's greater than 720dp the device is a 10 tablet. We can work out the smallest width using the min function of Math class passing in the heightDp and the widthDp to return the smallestWidth . float smallestWidth Math.min widthDp heightDp.. min function of Math class passing in the heightDp and the widthDp to return the smallestWidth . float smallestWidth Math.min widthDp heightDp if smallestWidth 720 Device is a 10 tablet else if smallestWidth 600 Device is a 7 tablet However this.. is equal to the square root of the height in inches squared plus the width in inches squared. double diagonalInches Math.sqrt widthInches widthInches heightInches heightInches From this we can work out whether the device is a tablet or not if..

Android color picker to be included in the activity

http://stackoverflow.com/questions/16363235/android-color-picker-to-be-included-in-the-activity

final int CENTER_Y 100 private static final int CENTER_RADIUS 32 private int floatToByte float x int n java.lang.Math.round x return n private int pinToByte int n if n 0 n 0 else if n 255 n 255 return n private int ave int s int d float.. int pinToByte int n if n 0 n 0 else if n 255 n 255 return n private int ave int s int d float p return s java.lang.Math.round p d s private int interpColor int colors float unit if unit 0 return colors 0 if unit 1 return colors colors.length.. onTouchEvent MotionEvent event float x event.getX CENTER_X float y event.getY CENTER_Y boolean inCenter java.lang.Math.sqrt x x y y CENTER_RADIUS switch event.getAction case MotionEvent.ACTION_DOWN mTrackingCenter inCenter if inCenter ..

Display Good-looking Math Formula in Android

http://stackoverflow.com/questions/17029780/display-good-looking-math-formula-in-android

Good looking Math Formula in Android It is sad to see that science and math is never given enough attention in Android platform. Maybe this.. how to solve this problem. What I want to do is simple I just need to use render mathematic equation. It can be MathJax or JqMath or anything that is small and fast. If I have to do it in a webview how can I show plain text in paragraph.. solve this problem. What I want to do is simple I just need to use render mathematic equation. It can be MathJax or JqMath or anything that is small and fast. If I have to do it in a webview how can I show plain text in paragraph and formatted..

How to use onSensorChanged sensor data in combination with OpenGL

http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl

mI new float 16 private float resultingAngles new float 3 private int mCount final static float rad2deg float 180.0f Math.PI private boolean landscape public SensorToOpenGlTests Called with the activity is first created. @Override public void.. rotationMatrix this assumes that the rotation matrices are multiplied in x y z order Rx Ry Rz resultingAngles 2 float Math.asin rotationMatrix 2 final float cosB float Math.cos resultingAngles 2 resultingAngles 2 resultingAngles 2 rad2deg resultingAngles.. are multiplied in x y z order Rx Ry Rz resultingAngles 2 float Math.asin rotationMatrix 2 final float cosB float Math.cos resultingAngles 2 resultingAngles 2 resultingAngles 2 rad2deg resultingAngles 0 float Math.acos rotationMatrix 0 cosB..

Implement page curl on android?

http://stackoverflow.com/questions/3912849/implement-page-curl-on-android

example above code for iPhone but I have no idea how I would go about implementing this on android. Could any of the Math gods out there please help me out with how I would go about implementing this in Android Java. Is it possible using the..

Page curl/turn effect in Android [duplicate]

http://stackoverflow.com/questions/4376962/page-curl-turn-effect-in-android

Android Compass orientation on unreliable (Low pass filter)

http://stackoverflow.com/questions/4699417/android-compass-orientation-on-unreliable-low-pass-filter

null accelerometerValues magneticFieldValues SensorManager.getOrientation rotationMatrix values double degrees Math.toDegrees values 0 My problem is that the positioning of the ImageView is very sensitive to changes in the orientation... the noise of my readings by adding a Low pass filter but i have no idea how to implement this because of my lack of Math . Im hoping someone can help me creating a more steady reading on my device Where a little movement to the device wont affect.. on my device Where a little movement to the device wont affect the current orientation. Right now i do a small if Math.abs lastReadingDegrees newReadingDegrees 1 updatePosition To filter abit of the noise. But its not working very well android..

android: camera onPause/onResume issue

http://stackoverflow.com/questions/7935292/android-camera-onpause-onresume-issue

Unknown error 0 10 28 18 59 46.540 ERROR dalvikvm 2919 Failed to write stack traces to data anr traces.txt 1 of 3414 Math result not representable 10 28 18 59 46.610 ERROR dalvikvm 3044 Failed to write stack traces to data anr traces.txt 3354.. representable 10 28 18 59 46.610 ERROR dalvikvm 3044 Failed to write stack traces to data anr traces.txt 3354 of 7154 Math result not representable ... Here is my shortened code public class CameraActivity extends Activity implements MenuViewCallback..

android: I get no stacktrace, phone just hangs

http://stackoverflow.com/questions/8481402/android-i-get-no-stacktrace-phone-just-hangs

to signal 3 12 17 12 45 08.613 ERROR dalvikvm 10499 Failed to write stack traces to data anr traces.txt 1 of 3362 Math result not representable 12 17 12 45 08.613 ERROR dalvikvm 10365 Failed to write stack traces to data anr traces.txt 1 of.. representable 12 17 12 45 08.613 ERROR dalvikvm 10365 Failed to write stack traces to data anr traces.txt 1 of 2832 Math result not representable 12 17 12 45 08.625 INFO dalvikvm 10731 threadid 3 reacting to signal 3 12 17 12 45 08.633 INFO.. to signal 3 12 17 12 45 09.004 ERROR dalvikvm 10848 Failed to write stack traces to data anr traces.txt 1 of 3867 Math result not representable 12 17 12 45 09.015 INFO dalvikvm 10924 Wrote stack traces to ' data anr traces.txt' 12 17 12 45..

What's the best practice to round a float to 2 decimals?

http://stackoverflow.com/questions/8911356/whats-the-best-practice-to-round-a-float-to-2-decimals

I'm using eclipse Android SDK. I need to round a float value to 2 decimals. I usually use the next trick using Math library. float accelerometerX accelerometerX 100 accelerometerX round accelerometerX Log.d Test accelerometerX 100 But I..