Android :: DrawArc() Method With Inner & Outer Radius?
Oct 6, 2010
I have the following custom view:
This I have achieved by using the Canvas' drawArc() method. However, with this drawArc() method I cannot limit the arc's inner radius.
What I'd like to have is something like this: where there is only an outer ring left.
What I need is an drawArc() function where I can set the inner radius of the arc. Anyone an idea how to do that?
Overpainting the inner area doesn't work, because it needs to be transparent. Painting an inner circle with Color.TRANSPARENT after painting the red and blue cones doesn't remove the old color. It just puts another layer on top, which is transparent and through which I can still see the red and blue.
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Aug 31, 2010
I m doing some task with following code,
I want to access inner class variable from outer class method.
class Outer extends Activity
{private Handler mHandler = new Handler();
StopTheThread()
{mHandler.removeCallbacks(mUpdateTimeTask);//
This is the what I want to do:
} class Inner
{ final Runnable mUpdateTask = new = new Runnable() {
public void run() {
//Some Code Goes Here
} };
InnerClassMethod()
{ mHandler.removeCallbacks(mUpdateTimeTask);//
This statement working fine here. Here mUpdateTask is inner class variable which is not accessible from outer class.
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Aug 10, 2010
In my Android application I've hidden the default title bar, introduced a TabView and added my own titlebar under that TabView's tabs. At the moment, I'm using the ?android:attr/windowTitleStyle style which makes my new titlebar look gray and gradient. It looks pretty good, but my screens are looking pretty grayscale. I'd like to spice things up a bit by making this titlebar a different color gradient.
What am I looking at here? Creating my own image and using it? The ?android:attr/windowTitleStyle style seems to expand depending on the height of your custom titlebar; so I'm not sure it's actually a single image.
I've attempted to throw a LinearLayout over it with a bit of translucency (ex: making the color #800000FF), but the gradient style I have behind this LinearLayout disappears.
Update:
Per my answer down below, I've figured out that I can create an XML file that defines a gradient and use that. It works fine inside a LinearLayout (titlebar_gradient) I have on my layout. However, it is not working on the outer-most LinearLayout (background_gradient). Could someone tell me why? As I understand it, the ListView should be transparent...
code:...............
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Mar 30, 2010
In the midst of this crappy day, I dropped my Hero and cracked the outer screen. Where can I buy a new casing to replace the one I just broke? I've searched around but have found virtually no places that sell a basic faceplate.
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Mar 1, 2010
I want to store locations in my Android phone and be able for the application to tell me if I am inside these points&radius.What is the best way to store many point&radius locations and efficiently query for them?
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May 12, 2010
I want to draw a a circle of 15 KM radius around a point on Google Maps by using Android. In Android we only have MapView and MapViewController. How can I implement the drawCircle funciton provided in Google Map Circle example in Android.
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Jul 26, 2010
When using border-radius on my android emulator I am seeing ugliness like this:
Is there anyway to get Android to display rounded corners via -webkit-border-radius in a more pleasing way? Most modern desktop browsers and Mobile Safari seem to antialias their corners, but not Android's renderer.
I'm really hoping I don't have to do this with images, and there is some awesome trick to get pretty corners with only a border radius css declaration.
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Jun 27, 2010
I have this query which does work fine in MySQL
CODE:............
Distance is in Kilometers, the input is lat=12.345 and lon=67.89
The SQLite is 3, and I can't run custom functions with it as it's on Android. I also don't have acos() etc... as that is not part of the standard SQLite.
How would be the above query in SQLite?
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Sep 3, 2009
In my application I have a list of +400 GPS coordinates which I retrieve from addresses. The application should give me the top X nearest coordinates based on my current location.
This application is possible (I think) with the distanceBetween function. But (I think) the application is really inefficient when i iterate through the list of 400 coordinates and check the distance within a certain time interval. Another option is (I think) the proximityAlert function? All coordinates are loaded in this function and when my current location comes in the radius of a coordinate an alert is given. But the downside of this solution (I think) is the high memory usage which implies a short battery life of the Android phone?
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Jan 16, 2010
I have a MapView that I'm displaying a "useful radius" (think accuracy of coordinate) in. Using MapView's Projection's metersToEquatorPixels, which is admittedly just for equatorial distance) isn't giving me an accurate enough distance (in pixels). How would you compute this if you wanted to display a circle around your coordinate, given radius?
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Jan 23, 2010
On the android website, there is a section about color drawables. Defining these drawables in xml looks like this:
<resources>
<drawable name="solid_red">#f00</drawable>
<drawable name="solid_blue">#0000ff</drawable>
<drawable name="solid_green">#f0f0</drawable>
</resources>
In the java api, they have thr following method to define rounded corners:
setCornerRadius(float radius)
Is there a way to set the rounded corners in the xml?
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Jul 7, 2010
Does the X support (non-PSK) wpa/wpa2 (enterprise / radius / 802.1x) authentication for connection to wifi networks using a central security authority?
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Sep 7, 2010
I'm trying to override the onBackPressed() method of the ActivityGroup class:
public class MyClass extends ActivityGroup {
@Override
public void onBackPressed() {
// do something
return;
}
but I'm getting the error The method onBackPressed() of type MyClass must override a superclass method. I'm relatively new to Java, I've seen here that people do it and it works for them Why I'm getting this error? I'm writing an app for android 1.5, could the problem be here?
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Nov 22, 2010
In Eclipse, when I mouse hover over a built-in method, it displays a method definition including stuff like what the method does, input objects, return objects etc. If I have a yellow line (warning) under the method I'm trying to use, I can't get the mouse-over to show the definition. If I try hitting F3, I get a "The Jar of this class file belongs to container "Android 1.6" How do I show the definition of the method I am using when there is a warning?
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May 12, 2010
I am trying to use annotation - method.getAnnotation( ) or method.isAnnotationPresent( ) and it is not working. I am using eclipse emulator for 2.1 OS version with JDK 1.6. Following is information about what I did..................
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Nov 1, 2010
I created a method called insertTable in a class called Table but i can't use it in my onClick method in the main class :
CODE:.......
I want to do a income.insertTable in the onClick method but eclipse say that i need to create a local variable.
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Jun 6, 2010
Basically I'm calling the onDraw method like so...
code:...................
You see I'm drawing it on top of a Camera view and the information being drawn is subject to change. I have a listener setup which will update the variables being drawn at the appropriate time but I now want to "refresh" this draw in that listener.
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Feb 27, 2010
I have two android projects, ProjA requires ProjB (in Eclipse Properties > Java Build Path > Projects > Add > ProjB). Every thing compiles ok in Eclipse, but when I run ProjA I get an error: Could not find method XXX, referenced from method YYY. Where XXX - is the method from ProjB. How can I fix the settings?
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Aug 28, 2010
the title say it all. I wanna know a corresponding method in Android/Java that is like the GetTickCount method in C#/C++?
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Sep 15, 2010
Why should a static method in java accept only final or non final variables within its method, but not static?
For example I have the following method:
CODE:.................
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Nov 12, 2010
What is the point of setters and getters in java? I have a question about set method. Please provide some details if possible.I want to know why do we use set method with class name.Is it just setting the sec variable value ? if yes why there is class name with set?
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Oct 11, 2009
Is there any method to get one view by name rather than it's ID? Because we are composing a common lib, and it's not able for us to know the Resource ID at this time. So is there any method to get one view by name, not by findViewById?
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Mar 29, 2010
Can anyone tell me how to use emulateShiftHeld () method of WebView class.
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Jan 25, 2010
After that I make update-api, then make successfully.the problem is when I develop in eclipse, the eclipse won't recognize the new getBitmap method and won't get apk build.Is there anything else I should do to let eclipse work with the new method?
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Jul 3, 2010
Is there any method that listens for map moves or zoom changes? I know there is a mapMoved() method in the map listener interface for the nutiteq map (I'm using google maps though) so I'm wondering if there is anything similar for google maps, or if not, if there is someway to listen for getMapCenter() changes.
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Jun 2, 2009
Im using a base adapter for binding a data from array to listview....the listview has a checkbox with it...i wanted to create a menu to select all or deselect all view inside that list...but the getchildCount method is behaving abnormally..i m not able to get the correct child count...
CODE:................
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Sep 23, 2010
I am trying to write an app that will only run if the phone has a camera flash (i.e. not on my HTC Hero but on a HTC EVO 4G or Samsung Epic 4G, etc...). I found a code sample that will set the flash mode (and should work) but after modifying it to get the flash mode I am told that no phone has a flash when I run it even if they do. My code is as follows, I'd appreciate any help on figuring out what I did wrong since it looks correct to me.
CODE:...........................................
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Nov 9, 2010
I want to use dynamically registered BroadcastReceiver that has a reference to an activity so it can modify its UI. I am using Context.registerReceiver method but receiver's onReceive method is never called.
Here is the sample code showing the problem:
CODE:............................................
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Aug 21, 2010
I am looking to run a certain method call every ten minutes in Android, what is the best way to go about implementing this? I am currently looking at using the Handler object's PostDelayed method.
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Apr 29, 2010
I create an input method that is private, not available to other applications on the phone?
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