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2014/10/16 ¤W¤È 08:19:07
android Programming Glossary: measuringFill remaining space with fixed aspect ratio surfaceview http://stackoverflow.com/questions/10510371/fill-remaining-space-with-fixed-aspect-ratio-surfaceview aspect ratio. onMeasure gets called multiple times during measuring and the way RelativeLayout works is that it first asks the custom..
How ListView's recycling mechanism works http://stackoverflow.com/questions/11945563/how-listviews-recycling-mechanism-works as getView will force your adapter to get some child for measuring the height of the views to be drawn in list view and can cause..
Making a ListAdapter-recycleable Resizable View http://stackoverflow.com/questions/14128018/making-a-listadapter-recycleable-resizable-view wrap_content so the MeasureSpec will be unspecified. Skip measuring the child and just accept the measurements from the first run...
Is Android layout really exponentially hard? http://stackoverflow.com/questions/17493819/is-android-layout-really-exponentially-hard weights bad for performance Alternatives Android layout measuring time doubles with each step up the hierarchy Layout Weight warning.. tricks 1.html My question is whether the recursive double measuring is fundamentally necessary justified and if so I'd like a clear.. linearlayout share improve this question In terms of measuring children twice it's my understanding that this is what happens..
Android 2.1: How do I poll the RSSI value of an existing Bluetooth connection? http://stackoverflow.com/questions/2149295/android-2-1-how-do-i-poll-the-rssi-value-of-an-existing-bluetooth-connection after calling hci_read_rssi . This is slower than just measuring RSSI from beacons as other wireless communication means provide..
measuring a view before rendering it http://stackoverflow.com/questions/2827079/measuring-a-view-before-rendering-it a view before rendering it I need to find out how big a view..
Trying to get the display size of an image in an ImageView http://stackoverflow.com/questions/3855218/trying-to-get-the-display-size-of-an-image-in-an-imageview the image as it is shown. This must be done after the measuring stage and the example here shows it called in an Override of..
Getting decibel from an android microphone http://stackoverflow.com/questions/4271989/getting-decibel-from-an-android-microphone electric spark starter pistol whatever that you are also measuring across frequency with good lab equipment in a radiation symmetric..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration example with the help of gyros your code will mostly be measuring tilt instead of distance. HA I just realized from my last statement..
How to get link speed programmatically? http://stackoverflow.com/questions/4429605/how-to-get-link-speed-programmatically link speed this is only available at a high level actually measuring not the link speed but the speed between your phone and a server..
Android phone orientation overview including compass http://stackoverflow.com/questions/4819626/android-phone-orientation-overview-including-compass Therefore depending on the orientation of the phone by measuring the amount of rain flowing through the 3 tubes you can calculate..
Auto Scale TextView Text to Fit within Bounds http://stackoverflow.com/questions/5033012/auto-scale-textview-text-to-fit-within-bounds mTextSize mMaxTextSize mTextSize Resize text after measuring @Override protected void onLayout boolean changed int left int.. and use a static layout to render text off screen before measuring private int getTextHeight CharSequence source TextPaint paint..
GridView rows overlapping: how to make row height fit the tallest item? http://stackoverflow.com/questions/7545915/gridview-rows-overlapping-how-to-make-row-height-fit-the-tallest-item rendering. I did this by subclassing GridView and adding a measuring hook in the onLayout method. Custom view group that shares a.. getMeasuredWidth mMaxRowHeight rowIndex Here is the measuring function in my BaseAdapter subclass. Note that I have a method.. Inflate temp layout object for measuring GridViewItemLayout itemView GridViewItemLayout inflater.inflate..
Android Paint: .measureText() vs .getTextBounds() http://stackoverflow.com/questions/7549182/android-paint-measuretext-vs-gettextbounds Paint .measureText vs .getTextBounds I'm measuring text using Paint.getTextBounds since I'm interested in getting..
Android animate drop down/up view proper http://stackoverflow.com/questions/9248930/android-animate-drop-down-up-view-proper measured height as the actual height. Bellow is code for measuring height of the view and set this as the new height I assume the..
Fill remaining space with fixed aspect ratio surfaceview http://stackoverflow.com/questions/10510371/fill-remaining-space-with-fixed-aspect-ratio-surfaceview the width height in a way that allowed me to fix the aspect ratio. onMeasure gets called multiple times during measuring and the way RelativeLayout works is that it first asks the custom view for it's width without telling it the available height..
How ListView's recycling mechanism works http://stackoverflow.com/questions/11945563/how-listviews-recycling-mechanism-works and layout_width of your listview to wrap_content as getView will force your adapter to get some child for measuring the height of the views to be drawn in list view and can cause some unexpected behaviour like returning convertview even..
Making a ListAdapter-recycleable Resizable View http://stackoverflow.com/questions/14128018/making-a-listadapter-recycleable-resizable-view This state occurs on the second run. The child might be wrap_content so the MeasureSpec will be unspecified. Skip measuring the child and just accept the measurements from the first run. if heightMode MeasureSpec.UNSPECIFIED setMeasuredDimension..
Is Android layout really exponentially hard? http://stackoverflow.com/questions/17493819/is-android-layout-really-exponentially-hard already where that has been asked and answered Why are nested weights bad for performance Alternatives Android layout measuring time doubles with each step up the hierarchy Layout Weight warning Nested weight bad performance Efficiency of Android Layout.. http android developers.blogspot.com 2009 02 android layout tricks 1.html My question is whether the recursive double measuring is fundamentally necessary justified and if so I'd like a clear explanation example showing why. Edit 2013 8 22 I think.. I'm asking the question here. android android layout android linearlayout share improve this question In terms of measuring children twice it's my understanding that this is what happens with LinearLayouts particularly when weights are involved...
Android 2.1: How do I poll the RSSI value of an existing Bluetooth connection? http://stackoverflow.com/questions/2149295/android-2-1-how-do-i-poll-the-rssi-value-of-an-existing-bluetooth-connection is required for this connection and release connection after calling hci_read_rssi . This is slower than just measuring RSSI from beacons as other wireless communication means provide GSM or WIFI Low level connection to remote bluetooth devices..
measuring a view before rendering it http://stackoverflow.com/questions/2827079/measuring-a-view-before-rendering-it a view before rendering it I need to find out how big a view will be after attaching it to its parent. I have overridden..
Trying to get the display size of an image in an ImageView http://stackoverflow.com/questions/3855218/trying-to-get-the-display-size-of-an-image-in-an-imageview extracting and using the transformation Matrix used to display the image as it is shown. This must be done after the measuring stage and the example here shows it called in an Override of onMeasure for a custom ImageView public class SizeAwareImageView..
Getting decibel from an android microphone http://stackoverflow.com/questions/4271989/getting-decibel-from-an-android-microphone or you'd hit it with a wideband pseudo impulse such as an electric spark starter pistol whatever that you are also measuring across frequency with good lab equipment in a radiation symmetric position or as a last resort you use some known physical..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration can calculate the tilt independently of the accelerometers for example with the help of gyros your code will mostly be measuring tilt instead of distance. HA I just realized from my last statement that a lot of iPhone apps won't work in space P Additional..
How to get link speed programmatically? http://stackoverflow.com/questions/4429605/how-to-get-link-speed-programmatically other case that you refer the current Download Upload data link speed this is only available at a high level actually measuring not the link speed but the speed between your phone and a server which can be determinted not only by your link speed but..
Android phone orientation overview including compass http://stackoverflow.com/questions/4819626/android-phone-orientation-overview-including-compass side the X tube will eventually collect the max amount of rain. Therefore depending on the orientation of the phone by measuring the amount of rain flowing through the 3 tubes you can calculate the orientation. The phone also has an electronic compass..
Auto Scale TextView Text to Fit within Bounds http://stackoverflow.com/questions/5033012/auto-scale-textview-text-to-fit-within-bounds if mTextSize 0 super.setTextSize TypedValue.COMPLEX_UNIT_PX mTextSize mMaxTextSize mTextSize Resize text after measuring @Override protected void onLayout boolean changed int left int top int right int bottom if changed mNeedsResize int widthLimit.. false Set the text size of the text paint object and use a static layout to render text off screen before measuring private int getTextHeight CharSequence source TextPaint paint int width float textSize Update the text paint object paint.setTextSize..
GridView rows overlapping: how to make row height fit the tallest item? http://stackoverflow.com/questions/7545915/gridview-rows-overlapping-how-to-make-row-height-fit-the-tallest-item this work correctly but I had pre measure all cells before rendering. I did this by subclassing GridView and adding a measuring hook in the onLayout method. Custom view group that shares a common max height @author Chase Colburn public class GridViewItemLayout.. of the layout to reflect the max height setMeasuredDimension getMeasuredWidth mMaxRowHeight rowIndex Here is the measuring function in my BaseAdapter subclass. Note that I have a method updateItemDisplay that sets all appropriate text and images.. inflater LayoutInflater mContext.getSystemService Context.LAYOUT_INFLATER_SERVICE Inflate temp layout object for measuring GridViewItemLayout itemView GridViewItemLayout inflater.inflate R.layout.list_confirm_item null Create measuring specs int..
Android Paint: .measureText() vs .getTextBounds() http://stackoverflow.com/questions/7549182/android-paint-measuretext-vs-gettextbounds Paint .measureText vs .getTextBounds I'm measuring text using Paint.getTextBounds since I'm interested in getting both the height and width of the text to be rendered. However..
Android animate drop down/up view proper http://stackoverflow.com/questions/9248930/android-animate-drop-down-up-view-proper of the view before I start the animation and then use this measured height as the actual height. Bellow is code for measuring height of the view and set this as the new height I assume the view uses screen width change according to your own needs..
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