I am writing an app to capture the camera preview frames and convert it to bitmap in Android.
Here is my code:...........
After I start preview, the callback got called with data, but the bitmap is null.
What did I do wrong when convert the byte array to BitMap?
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I am trying to implement Camera application in android,and i got some code from net to create a Live Camera through WebCam.Upto this no problem.Now i have to capture the images when click the button, and i displayed the captured images in the Dialog window.Without any exception the program is running but the captured image is not displayed,some default image is displayed.
My code is.
CODE:.........
I have no idea from where this default image is coming.
This is the code that I have for camera preview and image capture.I am trying to do camera preview and as I press the space button I am trying to take picture and save it in the picture gallery of the Android development phone. The code compiles fine,but as I press the space button,it captures the image and throws an exception and closes the application...
CODE:...................
Is it possible to capture an image without showing the camera preview?, i have a requirement that i should be able to capture the image from a thread or from a service, without disturbing the foreground application, where i do not want to show the camera preview, but still i want to capture the image in background and store it in the device. So is it possible to do using the Android 2.2 SDK version?
View 3 Replies View RelatedI have a requirement to Capture the image without showing the Preview.. And i want to do it in the Background as a Service. Is it possible to do that?
View 2 Replies View RelatedI am seeing a very annoying behavior on Motorola Droid when trying to do a simple camera preview at QCIF resolution. And I was wondering if someone experienced something similar. Is there a workaround? Am I doing something wrong?
Let me explain the situation.
Firstly, right after boot-up, using native camera application there is nothing out of ordinary, I see preview each time and it is all perfectly well for as long as needed as many times as I want.
The "interesting" behavior starts when I use the slightly modified API Demos (full app available in Android SDK, modified file is attached). My goal is to preview (and later capture) video at QCIF (176 x 144) resolution.
Using CameraPreview module in API Demos application I can start preview and capture normally only the first time - picture is clear, focused, normal colors, etc. Preview and all is nice. The second time I do preview I see a very over-exposed picture, I need to turn it away from any light source to see anything, otherwise it is all white. And even in the shadow, everything is grainy, as if picture is taken with too sensitive settings (high ISO) with too long exposure. The third time, it is the opposite - the preview and capture is way too dark. I need to point the camera directly into the light source to see even a faintest picture. Pointing out of the window does not help, it has to be straight into the lamp or sun. The effect is like taking pictures with much too low ISO setting - it is way too underexposed.
The overexposed and underexposed sessions interchange, but it is not clear-cut which one appears first. So far the prevailing pattern is that overexposed one starts first. Now surprise comes when I try using native camera application. The pattern continues! It is as if hardware or or software (camera process) got "tainted" with the QCIF. This continues until I reboot the device.
Another interesting point is that if I allow device to "rest", symptoms are much less pronounced after 10 minutes, then in 15 minutes they become barely visible. However, it all comes back after the first time I capture in QCIF. Nothing like this is visible when resolution is higher, say, CIF, VGA or similar. The problem is that, for my purposes I need it to be QCIF.
Does someone know how I can overlay an image over the camera preview?
View 6 Replies View RelatedToday I tried the sample code to get the camera preview working
(http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/graphics/CameraPreview.html)
But the image looks distorted when I start the application on my Galaxy S.
As far as i know, Android emulator doesn't have a camera. To capture a live image we have to use the web camera. I have seen code in this web site to use the web camera in the android emulator to capture an image, but I don't know how to use this code.
View 2 Replies View RelatedI am having a problem capturing an image and storing it from the native camera app. Here is a sample of some of my code.
CODE:.............
After the picture has been taken and I'm returned back to my original Activity, When I navigate to my sd card via Android DDMS File Explorer the picture is not there. Anyone know why this is not being saved?
Iīm trying to capture frames from a video file, but I donīt know how to do it. Are there any classes like FrameGrabbingControl (in JMF) for Android? Is it possible with MediaPlayer and MediaRecorder classes?
View 2 Replies View RelatedI have created an app in which using native camera to capture the image and use it in an activity.The camera is working fine in all the devices of android but crashes in DROID RAZR.
View 1 Replies View RelatedLooking for a RAW capture with Android camera.I am trying with Xperia X10 camera to capture RAW image, now it has got Android 2.3.3 and APIs are available.
Also, is there any API or lib or .so which I can play around...
Let's say in my example I am working with SurfaceView for my CameraSurfaceView. I have a few questions, hope you can help me.
1. When this SurfaceView gets created (I assume via final CameraSurfaceView cameraView = new CameraSurfaceView (getApplicationContext()), this will result in a call createSurface() in SurfaceFlinger with format, width and height. Am I correct?
Is this SurfaceView also my UI window if I want to draw anything? I thought if I call setType(PUSH_BUFFER) on this surface, I won't be able to do any drawing on this surface.
2. How does the application pass these information like format, width and height to SurfaceFlinger for the allocation? Is it by using .setFormat, .setFixedSize?
3. How do they methods .setFormat, .setFixedSize related to the surfaceHolder.surfaceChanged() callback?
So I started with this little write-up. I wanted to try to make an application that will take pictures while running in the background. To start though I wanted an application that once opened would simply take a picture every X seconds. After recreating the classes and methods show in the walk through below I ran into a few problems.
http://itp.nyu.edu/~sve204/mobilemedia_spring10/androidCamera101.pdf
For starters its seems that the onCreate function sets up all the objects for the application, but if you try to take a picture through any other method than onClick (IE directly calling it) the application actually hasn't setup the canvas or the preview yet.
My first question:
Is there any conditional method that you can setup that will wait till all the "onCreate" objects are created and their associated methods are called and finished? How do I wait for the application to finish putting together my surface and starting the cameras preview before automatically starting to take pictures?
My second question:
I am required to have a preview available to take pictures. Is there anyway to push this application to the back (IE running in the background) while still taking pictures? Is drawing to a canvas a requirement? (From what I can tell AFAIK, you are required to have a surfaceholder to start preview, when you put up another screen or application that pauses the current application and closes the surface/canvas you were presenting that preview on). If my understanding is correct on all of this the best I will be able to do is make a 1x1 pixel canvas that will still take up the screen due to the application being in the foreground.
My Third question:
Is there any way around this? Can you still utilize the camera in some fashion without requiring the preview be drawn?
I have some questions regarding the code below for camera preview application.
1. How does surfaceCreated() and CreateSurface() relate? Is this surface created via createSurface() from SurfaceFlinger client to SurfaceFlinger server? If so, there must be 2 buffers (frame buffers from display driver if there is how acceleration or if it is the emulator, it will be from ashmem) associated with this surface: surface BB (for composition) and surface FB (for display).
2. How does the rendering buffer (frame buffer BB and frame buffer FB) get allocated in the camera preview application? Are they allocated by the application?
3. How does this surface relate to the preview buffers? Are the preview buffers allocated by the Camera Service during startPreview?
private class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder; private Camera camera = null;
public CameraSurfaceView(Context context) { super(context);
mHolder = getHolder(); mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
} public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open(); try {
camera.setPreviewDisplay(mHolder);
} catch (Exception e) { Log.e("Camera", "Failed to set camera preview display", e);
} } }
File is present in sdcard/image.jpg I would like to create my own application (activity). On a button press, the image stored in the sdcard needs to be displayed using the built-in image viewer. On pressing the back button from the Image viewer, it should go back to my running application.
View 2 Replies View RelatedCan anyone share or point me to working example of "video capture" with preview?
View 2 Replies View RelatedI would like to know how to read in an image file which has multiple frames in it. Something like an animated gif file. I would like to perform frame by frame animation with a file of this type. I don't want to have each frame as drawables in the resource directory. Can anyone throw some light on how to perform the above mentioned tasks.
P.S - I have already checked the example in the API demos where an animated gif is read as an object of type Movie. I don't want to read it in as a movie file.
I have built a face detection app where I get the frames from onPreviewFrame, do the face detection and then draw a circle on a canvas above my surfaceView. The problem is frames are automatically displayed using the surfaceview thread when Camera.StartPreview() is started. This is obviously necessary for the PreviewCallback to kick in. As the processing, face detection and drawing, is done in a separate thread(I am assuming here), there is a 2 second delay between the frame being displayed and the result of that frame being processed and drawn on the canvas.
What I want to do is stop the camera preview displaying the frames and display them myself after processing. I believe this has three benefits:
The delay with disappear.I can draw straight to the bitmap instead of on a canvas which is useless as you can not undo what you have done.It will keep memory consumption low by not having two threads using the same image.
I've read that it is possible to display frames from the previewCallback, how to stop the frames being displayed automatically?
I want to capture much larger image than the current small image captured by the android g1 phone camera.
View 9 Replies View RelatedI want to take a picture with camera, after read the document and googling,I found, if i don't want the original picture,i just use
Code...
I worked on N95 mobile, my goal is to capture image for every 2 min and send the image data to server without user help. I am done with image capturing manually but I am unable to capture image automatically could you please suggest me. I am getting certification message pop up. Is there any way to start my application automatically. I am messed with code signature and manufacturer agreement with Nokia. So I have decided to change the platform to Android mobiles. Could you please let me can I able to implement the above application in android mobiles android platform.
View 9 Replies View RelatedI want user to take picture using camera application. Then send the image to my application through "share". Does anyone knows how to do that?
View 2 Replies View RelatedI'm trying to get the camera preview running on my G2.
This is the code I'm testing with, which was taken from the sample code. It is using supplemental code supplied by Wu-Cheng, but its still throwing an error.
CODE:......................
I have a problem with using the camera of an Android 2.1 phone (HTC Desire), maybe you can help me.
After calling camera.open() DDMS in Eclipse shows the following errors:
CODE:............
Test view in the emulator works fine, but on my phone only a popup is shown where I only can close the application.
I upgraded to the 2.0 SDK yesterday. Don't know if that has anything to do with it. I can't get the Camera Preview example from the API Demos to work. I get the same error in both my emulator and on my G1:
E/AndroidRuntime( 4758): java.lang.RuntimeException: Fail to connect to camera service.
Anybody know about the camera Api in android.when i used this Api it displayed a black and white grids and a squre moving above it.Anyone know how to get a real time camera preview please help me with some code.
View 2 Replies View RelatedI see a couple of threads on this topic, but none of them seem to answer the question, so, I'm giving it another go...
Very simple idea... I want to some portion of the screen to preview (and shoot) the camera and the other portions of the screen to add my own graphical elements (buttons, colorful frame around the camera preview, etc).
The example that comes with Android fills the screen. The obvious solution (that doesn't seem to be working) is to use my own SurfaceView (rather than the one they do in the example) and have it sitting in my XML. The code (beneath) doesn't crash and reports that it's firing up the camera... it just never renders on the screen.
I have no idea what I'm doing incorrectly. My guess is that it has something to do with the display thread never having the urge to redraw anything after it renders the initial screen, but I even tried adding a button and initiating the camera to render on the surface view upon button click, but that has not provoked it any further.
(most of this code is pulled directly out of the Android sample code, so, I'm sure it's correct. I'm just doing something wrong in how I pull my View in after the fact, I think).
CODE:........................
I'm trying to capture an image by calling camera utility from "MeidaStore.ACTION_IMAGE_CAPTURE". However, it seems there is only on resolution available 640x480, while the native camera support 8MB resolution.Any permission or extra param needed to get larger resolution option? It'd much appreciated if anyone can help on this.
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