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2014/10/16 ¤W¤È 08:09:24
android Programming Glossary: accelerationComplete Working Sample of the Gmail Three-Fragment Animation Scenario? http://stackoverflow.com/questions/12253965/complete-working-sample-of-the-gmail-three-fragment-animation-scenario Is working with all android versions though view hardware acceleration is strongly recommended for this kind of animations. For non..
YouTube Video not playing in WebView - Android http://stackoverflow.com/questions/12708890/youtube-video-not-playing-in-webview-android HTML5 video in your application you need to have hardware acceleration turned on and set a WebChromeClient . For full screen support..
Is there a way to determine android physical screen height in cm or inches? http://stackoverflow.com/questions/2193457/is-there-a-way-to-determine-android-physical-screen-height-in-cm-or-inches the device in real units of length so I can calculate the acceleration due to gravity in pixels per millisecond. Is there a method..
http://stackoverflow.com/questions/2317428/android-i-want-to-shake-it private SensorManager mSensorManager private float mAccel acceleration apart from gravity private float mAccelCurrent current acceleration.. apart from gravity private float mAccelCurrent current acceleration including gravity private float mAccelLast last acceleration.. including gravity private float mAccelLast last acceleration including gravity private final SensorEventListener mSensorListener..
How can I use the animation framework inside the canvas? http://stackoverflow.com/questions/4938822/how-can-i-use-the-animation-framework-inside-the-canvas ballW ball.getWidth ballH ball.getHeight acc 0.2f acceleration dY 0 vertical speed initialY 100 Initial vertical position...
How to use Accelerometer to measure distance for Android Application Development http://stackoverflow.com/questions/6352681/how-to-use-accelerometer-to-measure-distance-for-android-application-development I know the accelerometer can be used to return the current acceleration along three axis in meters per second squared m s2 . But I have.. this question You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice...
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare North matter I guess not. It is far easier to compare the acceleration vectors than orientations Euler angles rotation matrices quaternions.. quaternions as tc pointed that out. If you are using acceleration data you have 3 dimensional vectors at each time point the x..
Indoor Positioning System based on Gyroscope and Accelerometer http://stackoverflow.com/questions/7499959/indoor-positioning-system-based-on-gyroscope-and-accelerometer are not enough. You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice...
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation I would expect given the calibration that these accelerations should add up to 0 roughly in each direction. However this.. each direction. However this is not the case and the total acceleration over 5000 iterations is nowhere near 0 averaging around 10 on.. for your help in advance. android physics accelerometer acceleration calibration share improve this question You get position..
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show what does it show I am developing application for car acceleration tracking. I used standard accelerometer calibrating it in specific.. orientation changing so i may use it and get pure linear acceleration of mobile device. BUT in real life.. I made simply application.. where V0 0 at first then speed of interval before this A acceleration SQRT x x y y z z t time of interval at the end i get very little..
Acceleration from device's coordinate system into absolute coordinate system http://stackoverflow.com/questions/11578636/acceleration-from-devices-coordinate-system-into-absolute-coordinate-system from device's coordinate system into absolute coordinate system..
Punch a hole in a rectangle overlay with HW acceleration enabled on View http://stackoverflow.com/questions/13528550/punch-a-hole-in-a-rectangle-overlay-with-hw-acceleration-enabled-on-view acceleration and the other is too slow. Method 1 SW Acceleration Slow final int saveCount canvas.save Clip out a circle. circle.reset.. SW rendering but I'd like to avoid that . Method 2 HW Acceleration V. Slow Create a new canvas. final Bitmap b Bitmap.createBitmap.. of the view is created every drawing call. Method 3 HW Acceleration Fast does not work on some devices canvas.drawColor backColor..
Acclerometer Sensor in Separate Thread http://stackoverflow.com/questions/17513352/acclerometer-sensor-in-separate-thread event TODO Auto generated method stub double Acceleration x y z x event.values 0 y event.values 2 z event.values 2.. y z x event.values 0 y event.values 2 z event.values 2 Acceleration Math.sqrt x x y y z z db.addAccel Acceleration Log.d MESSAGE.. 2 Acceleration Math.sqrt x x y y z z db.addAccel Acceleration Log.d MESSAGE SAVED @Override public void onAccuracyChanged..
Android - How to decide whether to run a Service in a separate Process? http://stackoverflow.com/questions/4658511/android-how-to-decide-whether-to-run-a-service-in-a-separate-process that we have a Service that collects the Sensor Data e.g. Acceleration GPS .. does some processing and stores them remotely on a server...
How can I use the animation framework inside the canvas? http://stackoverflow.com/questions/4938822/how-can-i-use-the-animation-framework-inside-the-canvas false Initialise animation variables. acc 0.2f Acceleration dY 0 vertical speed initialY 100 Initial vertical position angle..
Detect Hardware Acceleration at Runtime: Android http://stackoverflow.com/questions/6792115/detect-hardware-acceleration-at-runtime-android Hardware Acceleration at Runtime Android Is it possible to consistently detect if..
Work around Canvas.clipPath() that is not supported in android any more http://stackoverflow.com/questions/8895677/work-around-canvas-clippath-that-is-not-supported-in-android-any-more acceleratin everywhere else. See Controlling Hardware Acceleration for more information on how to enable and disable hardware acceleration..
Complete Working Sample of the Gmail Three-Fragment Animation Scenario? http://stackoverflow.com/questions/12253965/complete-working-sample-of-the-gmail-three-fragment-animation-scenario share improve this question Uploaded my proposal at github Is working with all android versions though view hardware acceleration is strongly recommended for this kind of animations. For non hardware accelerated devices a bitmap caching implementation..
YouTube Video not playing in WebView - Android http://stackoverflow.com/questions/12708890/youtube-video-not-playing-in-webview-android From the documentation In order to support inline HTML5 video in your application you need to have hardware acceleration turned on and set a WebChromeClient . For full screen support implementations of onShowCustomView View WebChromeClient.CustomViewCallback..
Is there a way to determine android physical screen height in cm or inches? http://stackoverflow.com/questions/2193457/is-there-a-way-to-determine-android-physical-screen-height-in-cm-or-inches or inches I need to know exactly how big the screen is on the device in real units of length so I can calculate the acceleration due to gravity in pixels per millisecond. Is there a method somewhere in the Android API for this android screen resolution..
http://stackoverflow.com/questions/2317428/android-i-want-to-shake-it into your activity class put this into your activity class private SensorManager mSensorManager private float mAccel acceleration apart from gravity private float mAccelCurrent current acceleration including gravity private float mAccelLast last acceleration.. SensorManager mSensorManager private float mAccel acceleration apart from gravity private float mAccelCurrent current acceleration including gravity private float mAccelLast last acceleration including gravity private final SensorEventListener mSensorListener.. apart from gravity private float mAccelCurrent current acceleration including gravity private float mAccelLast last acceleration including gravity private final SensorEventListener mSensorListener new SensorEventListener public void onSensorChanged..
How can I use the animation framework inside the canvas? http://stackoverflow.com/questions/4938822/how-can-i-use-the-animation-framework-inside-the-canvas getResources R.drawable.sky_bgr load a background ballW ball.getWidth ballH ball.getHeight acc 0.2f acceleration dY 0 vertical speed initialY 100 Initial vertical position. angle 0 Start value for rotation angle. @Override public void..
How to use Accelerometer to measure distance for Android Application Development http://stackoverflow.com/questions/6352681/how-to-use-accelerometer-to-measure-distance-for-android-application-development am just a beginner in the application development industry. I know the accelerometer can be used to return the current acceleration along three axis in meters per second squared m s2 . But I have come to know that an accelerometer can also be use as speedometer... android accelerometer android sensors share improve this question You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice. Here is an explanation why Google Tech Talk at 23 20. I highly..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare And as for tc's question does the orientation relative to North matter I guess not. It is far easier to compare the acceleration vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration.. vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration data you have 3 dimensional vectors at each time point the x y z coordinates. I would simply compute Dist i j SQRT A i X..
Indoor Positioning System based on Gyroscope and Accelerometer http://stackoverflow.com/questions/7499959/indoor-positioning-system-based-on-gyroscope-and-accelerometer share improve this question Gyros and accelerometers are not enough. You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice. Here is an explanation why Google Tech Talk at 23 20. I highly..
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation and sampling 5000 accelerometer readings in the X and Y directions. I would expect given the calibration that these accelerations should add up to 0 roughly in each direction. However this is not the case and the total acceleration over 5000 iterations.. that these accelerations should add up to 0 roughly in each direction. However this is not the case and the total acceleration over 5000 iterations is nowhere near 0 averaging around 10 on each axis . I realise without seeing my code this might be.. it more likely that I've made some errors in my coding Thanks for your help in advance. android physics accelerometer acceleration calibration share improve this question You get position by integrating the linear acceleration twice but the error is..
Android TYPE_LINEAR_ACCELERATION sensor - what does it show? http://stackoverflow.com/questions/7858759/android-type-linear-acceleration-sensor-what-does-it-show TYPE_LINEAR_ACCELERATION sensor what does it show I am developing application for car acceleration tracking. I used standard accelerometer calibrating it in specific position before start than considering phone's orientation.. as far as i understand it must do what i need filter gravity orientation changing so i may use it and get pure linear acceleration of mobile device. BUT in real life.. I made simply application that does little test public class Accelerometer implements.. but when i analyze data dump calculating speed like V V0 AT where V0 0 at first then speed of interval before this A acceleration SQRT x x y y z z t time of interval at the end i get very little speed three times less than real speed. Changing Sensor..
Acceleration from device's coordinate system into absolute coordinate system http://stackoverflow.com/questions/11578636/acceleration-from-devices-coordinate-system-into-absolute-coordinate-system from device's coordinate system into absolute coordinate system From my Android device I can read an array of linear acceleration..
Punch a hole in a rectangle overlay with HW acceleration enabled on View http://stackoverflow.com/questions/13528550/punch-a-hole-in-a-rectangle-overlay-with-hw-acceleration-enabled-on-view I have two methods that work but only works when disabled hardware acceleration and the other is too slow. Method 1 SW Acceleration Slow final int saveCount canvas.save Clip out a circle. circle.reset circle.addCircle cx cy radius Path.Direction.CW circle.close.. is not supported in this mode I know i can force SW rendering but I'd like to avoid that . Method 2 HW Acceleration V. Slow Create a new canvas. final Bitmap b Bitmap.createBitmap getWidth getHeight Bitmap.Config.ARGB_8888 final Canvas.. This is obviously slow a new Bitmap the size of the view is created every drawing call. Method 3 HW Acceleration Fast does not work on some devices canvas.drawColor backColor canvas.drawCircle cx cy radius eraser Same as the HW acceleration..
Acclerometer Sensor in Separate Thread http://stackoverflow.com/questions/17513352/acclerometer-sensor-in-separate-thread @Override public void onSensorChanged SensorEvent event TODO Auto generated method stub double Acceleration x y z x event.values 0 y event.values 2 z event.values 2 Acceleration Math.sqrt x x y y z z db.addAccel Acceleration.. TODO Auto generated method stub double Acceleration x y z x event.values 0 y event.values 2 z event.values 2 Acceleration Math.sqrt x x y y z z db.addAccel Acceleration Log.d MESSAGE SAVED @Override public void onAccuracyChanged Sensor.. x y z x event.values 0 y event.values 2 z event.values 2 Acceleration Math.sqrt x x y y z z db.addAccel Acceleration Log.d MESSAGE SAVED @Override public void onAccuracyChanged Sensor sensor int accuracy TODO Auto generated method..
Android - How to decide whether to run a Service in a separate Process? http://stackoverflow.com/questions/4658511/android-how-to-decide-whether-to-run-a-service-in-a-separate-process collects sensor data over the course of multiple hours. For that we have a Service that collects the Sensor Data e.g. Acceleration GPS .. does some processing and stores them remotely on a server. Currently this Service runs in a separate process using..
How can I use the animation framework inside the canvas? http://stackoverflow.com/questions/4938822/how-can-i-use-the-animation-framework-inside-the-canvas to alternate background with its mirror image. reverseBackroundFirst false Initialise animation variables. acc 0.2f Acceleration dY 0 vertical speed initialY 100 Initial vertical position angle 0 Start value for the rotation angle bgrScroll 0 Background..
Detect Hardware Acceleration at Runtime: Android http://stackoverflow.com/questions/6792115/detect-hardware-acceleration-at-runtime-android Hardware Acceleration at Runtime Android Is it possible to consistently detect if an Activity has hardware acceleration enabled when it is created..
Work around Canvas.clipPath() that is not supported in android any more http://stackoverflow.com/questions/8895677/work-around-canvas-clippath-that-is-not-supported-in-android-any-more null . This way you can still take advantage of hardware acceleratin everywhere else. See Controlling Hardware Acceleration for more information on how to enable and disable hardware acceleration at different levels in your application. The main..
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