¡@
2014/10/16 ¤W¤È 08:13:26
android Programming Glossary: factorIs Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra example code is incorrect. Specifically the order of the factors in the shader code should be reversed gl_Position uMVPMatrix.. to the application of the rotation matrix the order of the factors should also be reversed so that the rotation is the last factor... should also be reversed so that the rotation is the last factor. The rule of thumb is that matrices are applied in right to..
Detect 7 inch and 10 inch tablet programmatically http://stackoverflow.com/questions/15055458/detect-7-inch-and-10-inch-tablet-programmatically of the screen using metrics again in the form of a scale factor for the device which is based on the Android Design Resources..
Convert magnetic field X, Y, Z values from device into global reference frame http://stackoverflow.com/questions/15315129/convert-magnetic-field-x-y-z-values-from-device-into-global-reference-frame Since the gravitational acceleration is the dominant factor in the accelerometer vector normally low pass filter is sufficient... a real strong magnetic field. With gravity as a dominant factor you can filter accelerometer values but without any other knowledge..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly as both sample from the same source and using the same factor. I've tried to play with the downsampling method but nothing..
How to scale/resize text to fit a TextView? http://stackoverflow.com/questions/2596452/how-to-scale-resize-text-to-fit-a-textview looks at the number of characters and determines a scaling factor to apply to the TextView's text size and then incrementally.. The parameters necessary to determine the scaling factor i.e. the if else if statements were set by guess and check...
http://stackoverflow.com/questions/3132021/android-listview-illegalstateexception-the-content-of-the-adapter-has-changed VISIBLE block in onProgressUpdate crashes lowered by a factor of 10 but not disappeared. it was suggested in answer What I..
getting the screen density programmatically in android? http://stackoverflow.com/questions/3166501/getting-the-screen-density-programmatically-in-android The metrics.density property is a floating point scaling factor from the reference density 160dpi . The same value now provided..
Extending RelativeLayout, and overriding dispatchDraw() to create a zoomable ViewGroup http://stackoverflow.com/questions/6378904/extending-relativelayout-and-overriding-dispatchdraw-to-create-a-zoomable-vie obvious approach to me would be to hold the zoom scale factor as a single variable somewhere and in each of the child Views'.. and in each of the child Views' onDraw methods that scale factor would be applied to the Canvas prior to graphics being drawn... share improve this question If you are applying a scale factor to the drawing of your children you also need to apply the appropriate..
Android Convert Px to Dp (Video Aspect Ratio) [duplicate] http://stackoverflow.com/questions/6656540/android-convert-px-to-dp-video-aspect-ratio question Instead of trying to infer the dp conversion factor from the screen's density classification you can simply query.. metrics.density logicalDensity will then contain the factor you need to multiply dp by to get physical pixel dimensions..
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 of a zoomed image given the original scale point scale factor Problem in practice I'm currently trying to replicate the zoom.. the position and size of the view when at that scale factor 1 2 3 4 5 . In the example if you scaled by a factor of 2 around.. scale factor 1 2 3 4 5 . In the example if you scaled by a factor of 2 around A then you clicked on position B the X Y reported..
Is Google's Android OpenGL tutorial teaching incorrect linear algebra? http://stackoverflow.com/questions/11925647/is-googles-android-opengl-tutorial-teaching-incorrect-linear-algebra the guy who wrote that OpenGL tutorial I can confirm that the example code is incorrect. Specifically the order of the factors in the shader code should be reversed gl_Position uMVPMatrix vPosition As to the application of the rotation matrix the.. code should be reversed gl_Position uMVPMatrix vPosition As to the application of the rotation matrix the order of the factors should also be reversed so that the rotation is the last factor. The rule of thumb is that matrices are applied in right.. application of the rotation matrix the order of the factors should also be reversed so that the rotation is the last factor. The rule of thumb is that matrices are applied in right to left order and the rotation is applied first it's the the M..
Detect 7 inch and 10 inch tablet programmatically http://stackoverflow.com/questions/15055458/detect-7-inch-and-10-inch-tablet-programmatically work in density independent pixels dip. You get the density of the screen using metrics again in the form of a scale factor for the device which is based on the Android Design Resources for mdpi hdpi etc. float scaleFactor metrics.density From..
Convert magnetic field X, Y, Z values from device into global reference frame http://stackoverflow.com/questions/15315129/convert-magnetic-field-x-y-z-values-from-device-into-global-reference-frame filter values are approximately just the minus gravity vector. Since the gravitational acceleration is the dominant factor in the accelerometer vector normally low pass filter is sufficient. 2 The geomagnetic parameter represents a vector lying.. is nothing wrong with my app and the stone table produces a real strong magnetic field. With gravity as a dominant factor you can filter accelerometer values but without any other knowledge how do you fitler magnetic values How do you know if..
How to downscale images correctly? http://stackoverflow.com/questions/16408505/how-to-downscale-images-correctly Why does it occur Both methods should have the same result as both sample from the same source and using the same factor. I've tried to play with the downsampling method but nothing has helped. Using the inDensity instead of inSampleSize seems..
How to scale/resize text to fit a TextView? http://stackoverflow.com/questions/2596452/how-to-scale-resize-text-to-fit-a-textview similar implementation. The static method basically just looks at the number of characters and determines a scaling factor to apply to the TextView's text size and then incrementally increases the text size until the overall height an estimated.. and the width of the TextView is just below that of the TextView. The parameters necessary to determine the scaling factor i.e. the if else if statements were set by guess and check. You'll likely have to play around with the numbers to make it..
http://stackoverflow.com/questions/3132021/android-listview-illegalstateexception-the-content-of-the-adapter-has-changed when I added list.setVisibility GONE trackList.setVisibility VISIBLE block in onProgressUpdate crashes lowered by a factor of 10 but not disappeared. it was suggested in answer What I got sometimes please notice it happens really rarely once a..
getting the screen density programmatically in android? http://stackoverflow.com/questions/3166501/getting-the-screen-density-programmatically-in-android respectively. If you are targeting API Levels earlier than 4. The metrics.density property is a floating point scaling factor from the reference density 160dpi . The same value now provided by metrics.densityDpi can be calculated int densityDpi int..
Extending RelativeLayout, and overriding dispatchDraw() to create a zoomable ViewGroup http://stackoverflow.com/questions/6378904/extending-relativelayout-and-overriding-dispatchdraw-to-create-a-zoomable-vie go. At the moment this is something I need to achieve. The most obvious approach to me would be to hold the zoom scale factor as a single variable somewhere and in each of the child Views' onDraw methods that scale factor would be applied to the.. to hold the zoom scale factor as a single variable somewhere and in each of the child Views' onDraw methods that scale factor would be applied to the Canvas prior to graphics being drawn. However before doing that I have tried to be clever ha usually.. strategy Is there another way Thanks Trev android share improve this question If you are applying a scale factor to the drawing of your children you also need to apply the appropriate scale factor to all of the other interactions with..
Android Convert Px to Dp (Video Aspect Ratio) [duplicate] http://stackoverflow.com/questions/6656540/android-convert-px-to-dp-video-aspect-ratio android screen resolution aspect ratio share improve this question Instead of trying to infer the dp conversion factor from the screen's density classification you can simply query it directly getWindowManager .getDefaultDisplay .getMetrics.. .getDefaultDisplay .getMetrics metrics float logicalDensity metrics.density logicalDensity will then contain the factor you need to multiply dp by to get physical pixel dimensions for the device screen. int px int Math.ceil dp logicalDensity..
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 userspace when you only have the coordinate expressed in terms of a zoomed image given the original scale point scale factor Problem in practice I'm currently trying to replicate the zoom functionality used in apps such as the gallery maps when.. of a zoom operation around centre point A. Each box represents the position and size of the view when at that scale factor 1 2 3 4 5 . In the example if you scaled by a factor of 2 around A then you clicked on position B the X Y reported as B.. represents the position and size of the view when at that scale factor 1 2 3 4 5 . In the example if you scaled by a factor of 2 around A then you clicked on position B the X Y reported as B would be based on the screen position not on the position..
|