I'v been busy for a long long long time finding out how to draw a line between two (gps) points on the map in HelloMapView but with no luck.Could anyone please tell me how to do so.Suppose I use the HelloMapView which extends MapView. Do I need to use overlays? If so do I have to override the onDraw() method of the overlay and draw a line here? I actually tried these things but with no result.
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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);.............
Can I parse kml file in order to display paths or points in android? Please could you help me with that?
This is kml sample code which I would like to display in android google map:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<name>Paths</name>
<description>Examples of paths. Note that the tessellate tag is by default
set to 0. If you want to create tessellated lines, they must be authored
(or edited) directly in KML.</description>.....................................
How do i draw a semicircle using a path?
View 4 Replies View RelatedDo anybody know how to draw path between two points on Map?
I need to draw a line, from one point to other...
I found one link (http://csie-tw.blogspot.com/2009/06/android-driving- direction-route-path.html) about this, but itīs not works well.
I'm working on a game which will use projectiles. So I've made a Projectile class and a new instance is created when the user touches the screen:
@Override
public boolean onTouch(View v, MotionEvent e){
float touch_x = e.getX();
float touch_y = e.getY();
new Projectile(touch_x, touch_y);
And the Projectile class:
public class Projectile{
float target_x;
float target_y;
Path line;
public Projectile(float x, float y)
target_x = x;
target_y = y;
line = new Path();
line.moveTo(MyGame.mPlayerXPos, MyGame.mPlayerYPos);
line.lineTo(target_x, target_y);
So this makes a Path with 2 points, the player's position and and touch coords. My question is - How can you access points on this line? For example, if I wanted to get the x,y coords of the Projectile at the half point of the line, or the point the Projectile would be at after 100 ticks (moving at a speed of X pixels/tick)? I also need the Projectile to continue moving after it reaches the final point. Do I need to use line.addPath(line) to keep extending the Path?
I managed to get the Projectiles moving in a straight line, but they're going in strange directions. I had to fudge some code up:
private void moveProjectiles(){
ListIterator<Projectile> it = Registry.proj.listIterator();
while ( it.hasNext() ){
Projectile p = it.next();
p.TimeAlive++;
double dist = p.TimeAlive * p.Speed;
float dx = (float) (Math.cos(p.Angle) * dist);
float dy = (float) (Math.sin(p.Angle) * dist);
p.xPos += dx;
p.yPos += -dy;
The Angle must be the problem. I'm using this method, which works perfectly:
private double getDegreesFromTouchEvent(float x, float y){
double delta_x = x - mCanvasWidth/2;
double delta_y = mCanvasHeight/2 - y;
double radians = Math.atan2(delta_y, delta_x);
return Math.toDegrees(radians);
However, it returns 0-180 for touches above the center of the screen, and 0 to -180 for touches below.
how to draw a line in android give example
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The current implementation I have is very slow as I am looping over all the GPS coordinates and creating a new Point and overlayitem in an itemized overlay. This takes around 20 seconds for it to load all of these points and draw them to the mapview. Is there a way in which I can construct a series of lines or point from the GPS coordinates and draw them onto the mapview?
Example of current implementation:
CODE:...................
I'm having some difficulty with drawing a line on a map. I'm basically drawing it etc. but when I select other tab and then come back to the "map tab" the line disappears. How can I prevent that so the line stays there all the time? Please can someone help me to solve this?
View 1 Replies View RelatedHow to draw line on MapView given coordinates?
AFAIK, on iPhone it is possible.
Want to draw a line when I touch screen at two points. I can see OnTouch been invoked but after than everything breaks looks, the application crashes
I am using drawLine in Canvas.
CODE:......................
I want to draw a straight vertical line on my Android activity, when a button is pressed. Please explain how I can draw the line with a position & length I want.I have a linear layout with vertical orientation. A set of buttons constitute this linear layout. When I press one button, I want a line to appear to the right of these buttons, like dividing the screen halfway - a straight line of width=2dip and height=200dip.
View 1 Replies View RelatedThis is really frustrating, I am trying to get a carriage return drawn in my custom view and nothing is working. I have tried 'System.getProperty("line.separator")' but that makes it say null and I have tried '
' and '
' and those just both draw a little square. I am using the canvas.drawText meathod.
Is there a way to read the points created when drawing a path? It seems silly to me that a path cannot be readable.Or is it just better to manually write the current finger position to an array?
View 1 Replies View RelatedI'm new to Android. and I parse a XML file from the following URL http://maps.google.com.tw/maps/api/directions/xml?origin=41.77732,-87. and I want to draw a route on Map, I found the information can help me to do this <polyline> <points>se~}FjtxuOKdEJ|JIpA</points> <levels>B??B</levels> </polyline> but how to use? help me, there are so many useless information when I search "Android polyline example" anyone can give me some short examples?
View 4 Replies View RelatedCan 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 was wondering where are cookies located when you install Google Chrome on an Android device. In addition, I wasn't able to find the installation path of Google chrome...
View 1 Replies View RelatedCurrent the Google map display US as default.
I want to display India as default on the map.
How can i do this?
I'm writing an app that shows in google maps pipes and valves(lines and points). For that i've two classes.
One extends from ItemizedOverlay, and i add to map overlay one for each category of valve, and each one can have more than one item.
The second extends from Overlay, and in the draw method y draw the line with the method drawline of the canvas.
The problem i've is that the lines are drawn over the ItemizedOverlay items, no matter the order i add them to the mapView.getOverlays().
I want the lines on the bottom of all overlays. is there a way to do that.
I have a quick question: what's the default path for the wallpaper picker in the Google car home app? When I go to settings > wallpaper > select from gallery, it's blank because there's no pictures in that directory and I can't use any of my other gallery apps to choose (I tried clearing defaults already). I just need the path so I can move the backgrounds into that specific folder.
View 2 Replies View RelatedI wonder, how can I draw a nice flight route between 2 points on a google map's MapView? look at this: http://maps.forum.nu/gm_flight_path.html
View 6 Replies View RelatedI have a text file in my res/raw directory. I want to read the file line by line, but FileReader and BufferedReader fail, because of Android's security restriction. How else can I do it?
View 1 Replies View Relatedright so the bottom buttons were working fine, but the next day, the back button takes me to the home screen :S so if im on facebook, press the back button, instead of going to the previous page. and i also set up the draw thing to unlock it, but as it was raining a little it said i entered it wrong too many times and asked for the google mail thing... but i really have no rememberence of making one, which is so ******* annyoying.
the only way ive found out to solve this problem is doin a phone software update, however as my bottom right button is working properly, everytime i hold it down to plug the phones usb, the phone just starts normally, so basically i cannot do the system update.
Recently I have been having issues with viewing my email messages in the Yahoo Mail App. When I open some messages all is see is line after line of code instead of the message text. It doesn't seem to matter what the source email is (gmail, hotmail, etc). Some emails are ok some are not. Anyone else have this problem? Any fixes?
View 1 Replies View RelatedCan we align our text line by line(I mean whatever the text we have selected that should be aligned instead of the whole text) in android text-view dynamically!
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View 3 Replies View RelatedI am launching an image picker (from the gallery) and my code crashes every single time. I tried to get some help in another post, but people quit responding to the post. Please help. When I do a debug, it tells me this (there are TONS of errors, but these looked the most important - also, I changed the "com.app.name/com.app.name.activity" for privacy reasons):
04-01 14:09:30.254: WARN/dalvikvm(719): threadid=3: thread exiting with uncaught exception (group=0x4000fe68) 04-01 14:09:30.254: ERROR/AndroidRuntime(719): Uncaught handler: thread main exiting due to uncaught exception 04-01 14:09:30.274: ERROR/AndroidRuntime(719): java.lang.RuntimeException: Failure delivering result ResultInfo {who=null, request=1, result=-1, data=Intent { data=content://media/ external/images/media/7 }} to activity {com.app.name/ com.app.name.activity}: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1 04-01 14:09:30.274: ERROR/AndroidRuntime(719): Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1
Here is the code that invokes the activity, follwed by the code that is invoked after the activity has finished:
public void takePic() { Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); photoPickerIntent.setType("image/*"); startActivityForResult(photoPickerIntent, 1);
}
I have create a zip file on the phone sdk. So i need to create a program to attach that zip file and mail it. For that i need the uri of that file. I used its physical path but it doesn't work. path to the file - sdcard/myfile.zip. i used it in the code in foloowing way
sendIntent.putExtra(Intent.EXTRA_STREAM,Uri.parse("file://sdcard/ myfile.zip"));
when email is sent no attachment can be seen. Is it a problem with a uri. is it a problem with the MIME type
I'd like to use the RandomAccessFile class to access a file that ships with my application. However, that class only accepts a String which is the path to the file. If I place my file somewhere like the assets directory, how do I construct a path to that file? I know I can use the getAssets methods to read up resources, but those only return InputStreams which cannot be seeked.
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