Android :: Loop To Draw All Of The Circles?
Feb 24, 2010
I' trying to complete an assignment. I need to be able to draw circles with the canvas in Android and also draw the ten previous circles while my finger moves. I have saved the coordinates in an arraylist and tried to use a for loop to draw all of the circles. Here is my code, I'm just looking for suggestions not answers if anyone has any. I will attach my code. Right now it only draws one circle at a time.
`package edu.elon.cs.mobile;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Paint.Style;............
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Jun 15, 2010
I am trying to draw a cupola circles at random positions in an Android application. I draw them on a bitmap and then draw that bitmap on the canvas. This is the function where a draw the circles:
private void drawRandomCircles(int numOfCircles) {
Canvas c = new Canvas(b);
Paint cPaint = new Paint;
cPaitn.setColor(Color.RED);
for(int i = 0; i < numOfCircles; i++) {
int x = Math.Random % 100;
int y = Math.Random % 100;
c.drawCircle(x, y, 20, cPaint)
}
}
The Bitmap b is global. And after calling this function I just draw the bitmap in the onDraw method. Now the problem is that I only get one circle drawn on the screen, no matter the size of numOfCircles.
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Aug 14, 2010
What is the simplest way to draw pixels, lines and circles on a View?I want to move a cross cursor around, so nothing particularly intensive.I thought I could extend SurfaceView and add it to an XML and it would just work, but it just appears black, however, when I look at the layout view of localmap.xml in eclipse, the graphics appear as expected. Any ideas? My onDraw is never called on the emulator, and even calling invalidate on the class makes no difference. I shall keep trying but can anyone see anything I've missed? or is there a better way entirely? Code...
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Aug 7, 2010
I am very new to android development and have been trying to draw a square comprised of multiple smaller rectangles of different colours... Like a Mosaic essentially. Basically at the moment I am reading values from a file which assigns the colour to the smaller Rects. I am using a pair of nested for loops to try to draw the small Rects sequentially, line by line. However when the program finishes there is only one small Rect drawn which is the last one to be drawn and its colour corresponds to the first value read from the file. Here is some of my code to show you what I mean:
public SnapshotDraw(Context context) {
super(context);
for(int a = 0; a < 63; a++){
for(int b = 0; b < 63; b++){
fileName = PREFIX + "2" + EXTENSION;..............
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May 7, 2010
Just want to start out by saying this seems like a great site, hope you guys can help! I'm trying to use the structure laid out in LunarLander to create a simple game in which the user can drag some bitmaps around on the screen (the actual game is more complex, but that's not important).
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Sep 5, 2010
In my android application I use this method in "draw" Overlay class for draw route on map. Can someone tell me if this method is good (in terms of performance) for route draw on map or I must to put code in Thread ??
I'm new to android.
public synchronized void draw(Canvas canvas, MapView mapView, boolean shadow) {
if (pointsAndTimes.isEmpty()) {
return;
}
Projection projection = mapView.getProjection();
Paint paint = new Paint();
paint.setARGB(250, 255, 0, 0);.............
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Jan 25, 2012
HTC EVO 4G Running Gingerbread
Google automatically created a group in my contacts file (url....) called "Circles." It contains everyone in my Google+ circles. Problem is that when I sync my contacts file on Android, it pulls all of these contacts (2,000+) onto my phone. The contacts application allows me to filter them (so they don't display), but these contacts (with their thumbnail images) consume over 30MB of precious storage space on my phone! Note I do NOT have Google+ installed on my phone (memory issue). If I delete that group from my contacts, my understanding is those people will be removed from my Google+ circles.
How can I stop this group from downloading? I will never email or call any of these people and this is making my phone almost unusable (memory issues), if I can't resolve then I'll probably be forced to delete my circles in Google+. Don't want to do that but it's more important that my phone works...
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Sep 1, 2010
I have used the full page People widget since day one. Now that I have FROYO, I don't get the little green circles that tells me a contact has updated something like their Facebook Status.
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May 23, 2010
I know that the one to the right of the ear piece is the LED, but what are the two that are on the left?
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Mar 28, 2013
Ive had my Droid Razr M for less than a week and I love it. I really like the Circles widget, but I want to make it smaller, is it possible to resize it? I dont see a way to get into an options menu for it.
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Oct 14, 2012
I was wondering if there was the circles widget for uccw.
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May 20, 2010
On my favorite contacts widget, next to each name there is a little green circle with a number in it.. what the heck is that for I cannot figure it out..
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Feb 4, 2013
Just now i connected my android phone(ICS 4.0.4) with my pc and the "USB Connected Turn on USB Storage" notification pops up. But on pressing the "Turn on USB Storage" the cirlce below it just keeps on circling and doesnot opens my sdcard in my pc as earlier it used to do. I removed the battery,sdcard and placed them again
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May 12, 2010
Anyone notice 2 circles on the HTC Incredible by the Verizon logo? If you look closely on the left side by teh Verizon logo there are 2 small holes that looks like the led light but a little bigger. Looks like one a photo sensor and the other what is that? Can it be a facing camera? I don't know if someone has already answer this but I just noticed it now :-)
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Mar 19, 2014
I finally updated my nexus after seeing it in my notification column. All seemed okay so let it get on with it.But when I thought it was ready I cannot get further than the four moving coloured circles. I have tried to factory reset and delete cache but has made no changes. I have been in contact with google play who now say there is no more actions that can be done so will need replacement.
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Sep 7, 2010
when im typing and its suggesting a word if i click the next key it draws a small circle. if i want to move to the next word i need to either click on the suggested word; press space; or press the back key then go front again. any way to fix this? i know alot of you will say get the htc but i gave it a try and surprisingly (dont bash me) i liked the original more. i would have stuck to htc but when i tried changing key sizes (height or width) it wouldnt let me. my only problem with the keyboard is having big fingers i missclick alot, something i never had an issue with on the iphone (once again dont bash me). so in conclusion i guess what im asking is 1. can i stop the keyboard from entering circles everytime i press next. 2. how can i change key type on htc (i know its in setting but it didnt work). 3. anyone know of another keyboard that has larger/spaced out keys like the iphone?
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Jun 21, 2010
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Nov 11, 2010
I'm trying to figure out how to draw on a bitmap in android, and keep a copy of these changed bitmaps for an undo function.
Bitmap b = ...
Paint p = new Paint();
canvas.drawBitmap(b, new Matrix(), null);
canvas.drawCircle(0,0,20,20);
//does Bitmap b have the circle drawn on it next time?
Or how do I get the bitmap after its been drawn on with the canvas(I want to preserve a stack of bitmaps with the changes applied by canvas drawing)? Maybe I'm going about this entirely wrong.
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Sep 2, 2009
I'm new to openGL and I have done some first tests with drawing a triangle. Now I would like to draw a circle, which is filled with a texture, but I have no idea, how to do so.Can someone of you give me a hint?
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Feb 16, 2010
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Aug 4, 2010
I'm investigating the possiblity of writing an app for Android/iOS4/both that would use GPS in the background. I found the "Receiving Location Events in the Background" section of the iphone developer documentation, which recommends that I only register for "significant location change" events. I'm not aware of any such capability in the Android SDK, but it still seems like a good idea to do it this way if I can (so as not to drain the battery). My question is this: has anyone done any sort of benchmarking for this on and iPhone/Android phone? So far, I've seen a lot posts/documentation saying that listening for GPS events in the background is a VERY BAD THING and I should AVOID IT AT ALL COSTS, but I haven't been able to find any numbers for just how much power a background application listening on GPS changes would drain (i.e. % battery drain per time app is running in the background).
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Sep 1, 2010
how to draw a line in android give example
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Oct 28, 2010
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protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.WHITE);
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canvas.drawLine(p1.x, p1.y, p2.x, p2.y, linePaint);
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}
Basically, I need to draw the new graphics as a layer on top of the last, so what I'm looking for is a way to carry the image of the last canvas to the current. I have tried to figure it out myself using the canvas.setBitmap() method but it acts very funny.
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Nov 13, 2010
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Aug 17, 2010
I studied the Androidreference for hours now, but don't really get the clue how to draw something (Text, Bitmap, Path ....) on a ImageView.
Should I extend View and use the onDraw()-Method? If yes, how can I draw on my ImageView?
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Oct 3, 2010
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Aug 16, 2010
I've got a standard RelativeLayout laying out my Buttons and TextAreas. What I want to do now is be able to draw various sparks, flying cows etc. at arbitrary places on the screen on top of the whole thing. What's the best way to do this? Should I override onDraw() on the containing View and draw after calling super.onDraw()? Or is there some better way of drawing a layer on top?
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Oct 13, 2010
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Oct 20, 2009
I have been able to draw a map using 'MapActivity' class. Am unable to render 3D graphics on the Map. Is there any way to draw something on the foreground with the Map as the background?
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Mar 29, 2010
I'm just getting started with developing for Android. I'm looking to port one of my iPhone applications, but I'm kind of at a loss for how to draw a view at runtime (a view not declared in the XML). Basically, I want to draw a simple rectangle, but then be able to manipulate its frame after being drawn. Sorry if this is a really, really simple question, but I can't seem to find some equivalent to the iPhone SDK here.
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