Android : Can I Create A View / Canvas That Is Not Rectangular?
Sep 29, 2010
I have a view that is round and hovering above (-> in z-axis direction coming out of the screen) the main content. When the someone taps the screen I want either the main content to be selected or the view hovering above, when it covers the main view.
So far that works perfectly. I have a round shaped item on a transparent canvas. Meaning you can see everything of the background that is outside of that circle. However, you cannot select it, because it is still the hovering canvas, just with a transparent paint.
Now I'm wondering, to solve this issue, if it is possible to make the view/canvas itself round shaped?
Update
I added an image for better explanation what I try to achieve.
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May 19, 2010
I am trying to create something like a rectangular grid with pictures. When a picture is clicked, it should zoom in pushing the other ones out. I don't know what you name you call this particular model with but does anyone have suggestions on where I should start?
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Aug 26, 2009
I have a View and that has a canvas. I am rotating the canvas, for rotating a bitmap. But after that, I need to draw one more bitmap on the Canvas and, this should not rotate. The second bitmap has to be static.
I tried with matrix rotation for bitmap. But its not rotating in the specified co-ordinates.
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Mar 11, 2010
I am trying to draw an animation. To do so I have extended View and overridden the onDraw() method. What I would expect is that each time onDraw() is called the canvas would be in the state that I left it in and I could choose to clear it or just draw over parts of it (This is how it worked when I used a SurfaceView) but each time the canvas comes back already cleared. Is there a way that I can not have it cleared? Or maybe save the previous state into a Bitmap so I can just draw that Bitmap and then draw over top of it?
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Sep 9, 2010
I am using SurfaceView to draw my game on the screen of the phone. Basically now I want to be able to draw Android Views on my View, such as a Button or ListView. I am simlpy getting a Canvas and then I draw on that... does anybody know how to draw AndroidViews (Button, ListView.) on my Canvas?
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Mar 6, 2009
Can anyone explain me the difference between View's Canvas and Bitmaps Canvas
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Sep 29, 2010
How can i draw a view on a canvas by giving the x,y position in the canvas.
For example,
I have custom view myView, which was created by inflating one of my layout.xml file.
Now i want to draw this myView on the canvas at position (x, y).
How can i do that? code...
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Apr 4, 2010
I called canvas.drawBitmap to draw an image, but somehow it's showing up behind/underneath the custom view (or it's background). can someone explain this?
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Mar 7, 2010
I have create a subclass of View and overwritten onDraw() - see some test code below. It draws a line consisting of some points. Before the line is drawn the canvas is rotated and restore after the drawing. The angle by which the canvas is rotated increases by 5 degrees every time onDraw() is called. The view is invalidated about once a second causing the view to be redrawn. Due to the rotated canvas the line drawn looks like a clock hand rotating counter-clockwise. This works - but not always. Sometimes the line is not drawn for one or more seconds, although I know from the log statement that onDraw() was called. Sometimes means: The line may be not shown after 8 seconds, then again after 35 seconds and so on. If the canvas is not rotated the problem does not occur. This also happens when I use a SurfaceView instead of a View. It does not only occur in the simulator but also on my G1 - both using Android 1.6.
CODE:.............
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Jul 19, 2010
I am drawing text in my custom view in android using canvas.drawtext. i need to change back color, and want text right aligned. for example i want to print the text in a 10, 10, 100, 20 rectangle of color yellow and text color red and right aligned. how can i do that ?
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Sep 30, 2009
I have a problem with my DDMS in eclipse. In the logcat view appears only this failure: Logcat View fails with "Could not create the view: For input string: "our" "
I uninstalled and reinstalled the adt and ddms already without any change. I can use the logcat in the command line (tools- adt logcat) but this is not as comfortable as using the logcat in eclipse.
More details of this failure message are:
CODE:...............
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Apr 7, 2010
I have a views on the main class and many other class with an onDraw() method to draw a canvas.
Java:
CODE:.....................
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Jul 7, 2010
My 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..
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Aug 18, 2010
How to change the rectangular thumb to round thumb in android seek bar?
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Jan 28, 2010
I could display the box around the URL link, but if my URL link spans over more than one line, then my code shows the one rectangle on 1 line. But, in android-browser, in the same case, whole URL (still if it spans over multiple lines) gets surrounded by single large rectangle. I am not getting how this is achieved in android ?
Can anyone please give me some pointer on this ? I could not able to find out exact code for this in android-webkit code.
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Jul 22, 2010
Can some one show me the sample code to draw a rectangular pulse in android screen. I want to generate a bunch of them on x axis (which I imagine as middle of screen).
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Jul 29, 2010
Specifically, I'm curious about how they did the phone number entry part, where they can add additional phone numbers fields when the user clicks the little add button. I initially thought that was done with a ListView, and I got a ListView to work, but the ListView scrolls independently of the rest of the screen, which looks bad.
So I was wondering what the best approach for something like that is? Am I on the right track with the ListView and just missing something allowing me keep it from behaving like it's own scrollable container? Perhaps a custom AdapterView or maybe just with a TableLayout dynamically adding rows? I'm just not sure what would work the best.
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Jun 12, 2009
I would like to know which way is the best and why between : - inflate a view from xml - create the view directly. I'm talking about performance.
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Aug 8, 2010
I want to create a custom view.In which i want to have a background image,2 buttons,1 textview.Can anybody tell me how to start with.
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Sep 1, 2009
Can any one help to create map view with a marker.
When we are clicking marker it should display info window.
By clicking that info window it shoul goto another layout.
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Sep 29, 2010
i think you may get the idea of wat i'm trying to do if you look at the code:here the complication is that i cannot create another textview for another line.
s8="hello";
t12=(TextView) findViewById(R.id.solid);
t12.setText("check"+"/n"+s8);
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Sep 14, 2009
I'm just wondering if I'm able to create a View from an external XML source. As I was reading, you must place the XML layout inside the res/layout and when you compile it, you can load the layout by typing setContentView(R.layouts.my_layout). What if I have this XML layout online (on a website) and I want to create the layout on runtime? Is there any way to do this? Or I have to parse the XML and create the layout (hard-coded)?
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Apr 25, 2010
I'm stuck on a problem and if possible I will need help from the community. I'm not looking for a ready-made solution, but something which would help me to produce the result.
I'm looking for a way to produce a dynamic activity based on a JSONArray object.
Here an example of a JSONArray object:
[ { "name": "my checkbox name",
"type": "checkbox",
"value": "one,two,three"
}
{ "name": "my edit text",
"type": "text",
"value": ""}...]
This JSONArray could be totally random. It could have 2 text views, 3 select menus, 1 text view and so on.
The goal is to iterate over this JSONArray and create the appropriate elements within my android code.
To produce the result I've thought of a simple switch which would render one by one my different JSONArray to an android widget.
But after that how could I have access of every property of every widget rendered?
Edit: I need as well to assign an event listener on some widget as taking the GPS coordinated...
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Sep 28, 2010
Is it possible to create a view that is bigger than the screen? I need a view that has a bigger width then the screen of the device. I use this view in a rotation animation. During the rotation the parts that were not on the screen before animating the view will become visible.
Is there a way to achieve this effect with the android framework?
I tried to set my parent layout much bigger then the screen and it is working. This will make somethings a little bit uncomfortable but it could work. The next problem now is that my layout still starts at the left side of the screen. I can't think of a method to make the layout to expand itself to the left and the right of the screen.
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Jul 17, 2010
Is there a way i can create a view and add some textviews into it ? programmatically ? any sample code?
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Mar 9, 2009
In the Tab2 of TabActivity in the APIDemo example, it has this method to create a View object for each tab. code...
Can you please tell me how can I create a View for each tab from an xml layout file? For example code...
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Nov 7, 2010
How to create multiple View in one screen?
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Oct 26, 2009
Just have a look in the system app contacts --->add new contact, this activity have a listview with different structured views for each row. I could do this by override the "getView" method, but a problem I'm facing is edittext will lose focus when I click on it. What happened when the view enter touch mode?
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Mar 8, 2010
Can anyone suggest a good tutorial about how to create custom view?
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Aug 5, 2010
I have a screen where I need to put a background image. I need to display only a part of the background image in each screen . Now when the user swipes towards left , the next screen will be displayed taking another portion of the background image. This transition from the first to second screen should give a 3 Dimension effect of moving the screen. I am unable to get any help form Android forums.
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