I am trying to rotate a canvas with canvas.rotate and move an object on it at the same time. The problem is that with the rotation, the coordinate system of the canvas rotates as well, so I get cases when my object is supposed to be moving along the y axis, but the y axis is rotated on place of the x axis. It is a mess. Is there a way to go around this?
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I'm trying to find information on how to change the coordinate system for the canvas.I have some vector data I'd like to draw to a canvas using things like circles and lines, but the data's coordinate system doesn't match the canvas coordinate system. Is there a way to map the units I'm using to the screen's units?
I'm drawing to an ImageView which isn't taking up the entire display.If I have to do my own calculations prior to each drawing call, how to I find the width and height of my ImageView?The getWidth() and getHeight() calls I tried seem to be returning the entire canvas size and not the size of the ImageView which isn't helpful.I see some matrix stuff, is that something that will work for me?I tried to use the "public void scale(float sx, float sy)", but that works more like a pixel level zoom rather than a vector scale function by expanding each pixel. This means if the dimensions are increased to fit the screen, the line thickness is also increased.
As we know, we can rotate a bitmap through 2 ways. The 1st way is: Matrix mt = new Matrix(); mt. postRotate (degree);Bitmap bitmap = CreateBitmap(src, 0, 0, w, h, mt, true); canvs.drawBitmap(bitmap, 0, 0, paint); In this way, we always need create new bitmap for every rotation, it is not good way for high performance game or app.The 2nd way is: canvas.save(); canvas.rotate(degree); canvas.drawBitmap(bitmap, 0, 0, paint); canvas.restore();In this way, we avoid creating new bitmap frequently, but the rotation bitmap is distortion, the bitmap quality is worse than first way.So, Is there 3rd way to rotate bitmap with high performance and good quality? Your any comments are really appreciated!
View 3 Replies View RelatedI need a small help on rotating one image around its center of axis among multiple images which are drawn to canvas in android.
I am loading images to canvas like below.
canvas.drawBitmap(mMachineBackground, 0, 0, null);
canvas.drawBitmap(mMachineRotator, 0, 0, null);
I want to rotate only the second bitmap around its center of axis instead of rotating the entire canvas(which includes first bitmap also).
the remapCoordinateSystem method remaps the axis for sensor readings, but I want to remap the coordinate system to any angle, for example: new coordinate system is say relative to earth's coordinate system, 20 degrees clockwise to earth's X axis, and 10 degrees to earth's Y axis, while Z is derived from X and Y axis.
View 2 Replies View RelatedRotate image on canvas around its center . i tried some example from net but i am failed
if i am using bitmap.creatbitmpa with matrix i am getting error
Please suggest me which is better
I means when you rotate the screen show to 90 degree,Then the coordinate system should also make an corresponding rotate[ (x,y) should change to (y,x)],To make touch event works correctly.
View 3 Replies View RelatedDoes anybody know how to rotate whole system screen from landscape to portrait?The platform is not G1 or any other phones, it's just a normal ARM platform.Not only one application but whole system.
View 1 Replies View Relatedport kitkat 4.4 for my phone micromax canvas 3d or micromax a115
View 1 Replies View RelatedI am writing a program that convert TM-2 degree to lat/lon on Android, but I can't find formula for that. I do find some example on internet, but most of them are convert with open source library, that I can't use on Android platform. I also find a java class that do convert from UTM to lat lon, but it seems no suitable for TM 2 degreen coordinate system. So my question is: how do I convert TM 2 degree coordinate to lat/lon? Where can I find formula?
View 2 Replies View RelatedI have an imageview and when clicked, calls OnClickListener.onClick(View v). How do I get the exact point/coordinate that the user clicked?
View 1 Replies View RelatedMy loadMap() method generate a canvas.throwIfRecycled exception when i try to load a new map.
When i start the game, the initial map loads and work fine though,
its only when i try to load a new map that i get the exception ..
How can i "reset" canvas and the bitmap i use to draw into, so i can startover fresh with them ?
here's what i use to create and draw my maps:
CODE:.........
So basicaly once i created and used picDest and canvas, i cannot figure how to reset it all for when i want to load a new map..
I just bought the Nexus One unlocked for AT&T and really like it. 1 wierd thing is that when I rotate the phone counter clockwise, the screen goes to landscape just fine; but when I rotate it clockwise it does not go to landscape "the other way". And, if I'm holding the phone 'normally' and rotate it 180 degrees ('upside down') it doesn't follow.My youngest daughter delights in telling me that her iPhone does this with no problem. What's up with that?
View 7 Replies View RelatedI have a HTC Magic (Rogers Canada).And, I see how the Dream (G1) rotates the home screen. can the Magic do that as well? Also, anybody know if it's possible to rotate the screen to the right and not just to the left? Shouldn't the acceleromater detect all the different rotated modes (even upside down?). that'd be cool
View 1 Replies View RelatedIs there a simple way to obtain the x,y coordinate whenever someone touches the screen while my app is running? Just looking to store them in some integers.
View 1 Replies View RelatedI'm trying to generate some points at random distances away from a fixed point using GPS.How can I add distance in meters to a GPS coordinate?I've looked at UTM to GPS conversion but is there a simpler method to achieve this?I'm working on Android platform just in case.
View 2 Replies View Relatedi want to find a gpls Coordinate and locate it on my google map. I've this code but it's not working :
Code:
private GoogleMap map;
private final LatLng location = new LatLng(310901,512113);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
[Code]...
I've this coordinate and it've tested it on google : E512113 N310901
How can I tell google to find this location ?
How to make screen mirror like as apsis coordinate...???
I tried:
Code:
persist.hwc.mirroring.enabled=1
persist.hwc.mirroring.transform=1
For example:
< | >
I found how to rotate manually:
Code:
Set in build.prob -> ro.sf.hwrotation = 0 for 0, 1 for 90, 2 for 180, 3 for 270 which you want...
But I need to mirror effect on all based android system
How to rotate control (checkbox) in 180 or 90 degrees ?
View 1 Replies View RelatedI am trying to make an imageview that rotates while sliding across the screen. I setup a rotate animation for 180 degrees, and it works by itself. I setup a translate animation and it works by itself. When I combine them I get an imageview that makes a big spiral. I would like the imageview to rotate around the center of the imageview while being translated. code...
View 1 Replies View RelatedI have 3 images that I want to add one after other on a canvas.
This is my code...
but this is not working.
Can someone please tell me what I am doing wrong here.
I'm using this camera code to ask the camera to rotate the captured image data... this seems to work on all phones, except the Droid. Has anyone else seen this? The image data is always landscape, however, the native camera app produces portrait images OK. I wonder if the Droid will only respect the new Camera.Parameters.set Rotation() method, but this seems to only be available in sdk level 5?
View 11 Replies View RelatedI'm just starting with Android development and I'm coming from JavaScript/HTML world so I'm currently investigating the possibilities of the Android SDK.
The HTML 5 canvas supports composite operations (See here).
Is this possible in an Android Canvas? I scanned the API of the Canvas class but couldn't find anything useful. I need at least the composite operation "source-in" or (if this isn't possible) "source-atop".
Can anybody tell me or send me some links if there is any..which tells how Google map draw on canvas in android. what is the logic behind that.
View 1 Replies View RelatedI'm currently writing an Android game using surfaceView. I've optimized the game as much as possible and it runs quite smoothly. However, I have collision detection incorporated which is a bit messy. I would like to do collision detection by reading pixels directly from the canvas. Is this possible to do? The closest to this that I have found was to attach a new bitmap to the canvas using setBitmap. Then when I drew to the canvas, the bitmap would be updated. Would this be the way to go?
View 2 Replies View RelatedHow to do Android 3D Application Pinch Zoom Pan Rotate?? can any one give me code for the same written inside ontouchEvent method
View 2 Replies View RelatedHow to move ball on particular angle in android canvas?
View 1 Replies View RelatedI'm developing an application which allows user to edit an image and save that edited image as new image on sd card I want to get the current state of the canvas object.
View 2 Replies View RelatedI have a Motorola DroidX phone and since yesterday, my screen will not rotate.I've gone into settings, (made sure that 'auto-rotate' is checked).I've also powered down the phone, taken the battery outthen powered back up.Still no rotation of the screen.
View 2 Replies View Relatedhere is another 2.2 problem I am having, this one is kinda bothering me.I am using a program, need it to rotate horizontally, I turn the phone, nothing happens.I shake the phone, nothing.Shake it again, finally the screen rotates.If I start some apps with the phone upright, the app opens sideways.I turn the phone sideways, turn it back upright, nothing.It takes several tries before the screen rotates properly. Im sick of having to move the phone all over the place if I need it to rotate.
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