I am trying to set orientation in portrait mode but I am trying to fixed it but it is not working.
Here's my code.
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {
Log.i("cameraDemo", "Surface changed...");
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i("cameraDemo", "Surface created, initializing camera...");
try {
camera = Camera.open();
camera.setPreviewDisplay(holder);
camera.startPreview();
Log.i("cameraDemo", "preview Started...");
} catch (Exception e) {
Log.i("cameraDemo", e.toString());
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera.release();
Log.i("cameraDemo", "camera released");
}
My question is:-
How do I fix it in portrait mode ?
Whenever I open camera, then it should be working only in portrait mode.
Is this in an Activity? If so there are two ways- you can either specify this in the manifest (see http://developer.android.com/guide/topics/manifest/activity-element.html) or in onCreate by adding the line
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
you should check this repo https://github.com/pikanji/CameraPreviewSample.git out. Awesome resource/utility for Camera handling in Android. Helped me a lot once. ( it's not my project! )
Cheers
Related
I have a project,where i have a button when the user click the button,then camera preview is set as wallpaper,can any one give me an idea how can i do that?
I am using Following code to camera preview
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback{
private SurfaceHolder mHolder;
private Camera mCamera;
public CameraPreview(Context context, Camera camera) {
super(context);
mCamera=camera;
// TODO Auto-generated constructor stub
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
try {
mCamera.setPreviewDisplay(holder);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
} catch (IOException e) {
Log.d("DEBUG", "Error setting camera preview: " + e.getMessage());
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
if (mHolder.getSurface() == null){
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
Log.d("DEBUG", "Error starting camera preview: " + e.getMessage());
}
}
}
But my problem was how to add the camera preview to WallpaperService?
First, when the user clicks the button, take a picture of the camera preview and find out the path where the picture is saved.
Then refer to this link to set a particular image as wallpaper by specifying its path.
How to set image as wallpaper programmatically?
You need to create a live wallpaper, with a WallpaperService. Then you'll need to have your service create its own rendering surface that it draws the camera preview into.
I want add a take picture function in lockscreen , and I need to open the preview on screen , but it's fail all the time , logcat say the Error is about "setPreviewWindow - Null ANativeWindow passed to setPreviewWindow" and "startPreview - Preview not started. Preview in progress flag set"
In keyguard_screen_tab_unlock.xml after the digital clock view, put
<FrameLayout
android:id="#+id/mPreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
In LockScreen.java constructor:
FrameLayout mFrameLayout = (FrameLayout)findViewById(R.id.mPreview);
SurfacePreview preview = new SurfacePreview(mContext);
preview.setZOrderOnTop(true);
mFrameLayout.addView(preview);
SurfacePreview class :
public class SurfacePreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mSurfaceHolder;
SurfacePreview(Context context) {
super(context);
mSurfaceHolder = this.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder) {
mCamera = Camera.open(CameraInfo.CAMERA_FACING_BACK);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.startPreview();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters parameters = mCamera.getParameters();
mCamera.setParameters(parameters);
mCamera.setDisplayOrientation(90);
}
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.release();
}
}
Anyone kown how to resolve this issue and start prview on LockScreen? Thanks a lot.
Hi
I am trying to use the camera to capture an image in one of my application. What is special is that I need a square preview area (and picture in the end). I tried defining the size of both picture and preview to 1:1 pixel ratios, but nothing seams to work. No matter what I does the picture looks "squashed" on a square.
Anyone who has any idea about how to resolve this?
code:
public class AddFromCameraActivity extends Activity implements SurfaceHolder.Callback {
private Camera mCamera;
private Parameters mParameters;
private SurfaceView mCameraPreview;
private SurfaceHolder mSurfaceHolder;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addimagefromcameramain);
initialise();
//Testing area
mCamera = Camera.open();
mParameters = mCamera.getParameters();
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
mParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
mParameters.setJpegQuality(50);
mParameters.setJpegThumbnailQuality(50);
mParameters.setPictureSize(1024, 1024);
//mParameters.setPreviewFormat(ImageFormat.JPEG);
mParameters.setJpegThumbnailSize(256, 256);
mParameters.setPreviewSize(500, 500);
mCamera.setParameters(mParameters);
}
private void initialise()
{
mCameraPreview = (SurfaceView)findViewById(R.id.cameraSurfaceView);
mSurfaceHolder = mCameraPreview.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.setFixedSize(500, 500);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mSurfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mCamera.release();
}
#Override
public void onPause()
{
mCamera.release();
}
}
thanks
You can take a look at the CameraPreview sample code from the Android SDK. The getOptimalPreviewSize method shows how to deal with different camera sizes and the onLayout method shows how to layout the preview surface in the activity.
In my app, I am trying to set up the camera. My class extends SurfaceView and implements the SurfaceHolder.Callback methods.
Here is some of my class:
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback{
private SurfaceHolder mHolder;
private Camera.Parameters cameraParameters;
private Camera camera;
public CameraPreview(Context context) {
super(context);
mHolder = this.getHolder();
mHolder.addCallback(this);
// If this is deprecated, why do I still need it?
// It says deprecated, but app crashes when removed.
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Camera.Parameters parameters = camera.getParameters();
List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
Camera.Size previewSize = previewSizes.get(0);
parameters.setPreviewSize(previewSize.width, previewSize.height);
camera.setParameters(parameters);
try {
camera.stopPreview();
camera.setPreviewDisplay(mHolder);
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
cameraParameters = camera.getParameters();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera.release();
camera = null;
}
}
My question involves the "setType" method in the constructor. The API claims the method is deprecated and ignored. However, if I comment out that one line, the entire application crashes when I call camera.startPreview(). I am trying to figure out why this is. If it's ignored, then it shouldn't matter what I did with that method. It implies that there is something very wrong with this implementation.
I am running Android 2.2 software.
Any help would be appreciated.
With Android 2.2 sdk setType method is not deprecated as I have already used that.
So might be there can be changes with other scenarios.
(1) Check the package you have imported is android.hardware.Camera.
(2) Check all permissions added in the manifest file for camera.
I'm currently trying to build an android application to take pictures and I need to freeze the camera preview on a given event (i.e. picture taken) and restart it only after another event.
What I want, in other words, is for the view to display whatever the camera sees until the freeze event occurs and then to freeze the image (i.e. display whatever was on screen at the time of this event -- as if a picture was taken) until the unfreeze event occurs.
Now, I'm currently using a SurfaceView with a SurfaceHolder.Callback to do this and I tried to use a PreviewCallback to freeze the screen, but unfortunately, I can't find an example or a tutorial and I'm really stuck at this point.
If anyone has a guide or some pointers on how to get this done, I would really appreciate the help...
I'm pasting the relevant parts of my code below:
public class CustomCameraView extends SurfaceView {
Camera camera;
SurfaceHolder previewHolder;
//Callback for the surfaceholder
SurfaceHolder.Callback surfaceHolderListener = new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
camera=Camera.open();
try
{
camera.setPreviewDisplay(previewHolder);
}
catch (Throwable t) {
}
}
public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int w, int h)
{
Parameters params = camera.getParameters();
params.setPictureFormat(PixelFormat.JPEG);
camera.setParameters(params);
camera.startPreview();
}
public void surfaceDestroyed(SurfaceHolder arg0)
{
camera.stopPreview();
camera.release();
}
};
public CustomCameraView(Context ctx)
{
super(ctx);
previewHolder = this.getHolder();
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
previewHolder.addCallback(surfaceHolderListener);
setBackgroundColor(Color.TRANSPARENT);
}
public CustomCameraView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
protected void onDraw (Canvas canvas)
{
}
public void closeCamera()
{
if(camera != null)
camera.release();
}
public void dispatchDraw(Canvas c)
{
super.dispatchDraw(c);
}
}
Thank you very much for your help!
-Billy
Old question, I know, but answering for posterity. You should be able to simply call
camera.stopPreview();
The preview will freeze on whatever you're looking at until you call startPreview() again.