How to automatically record an image in Android

Question

Possible duplicate:
Capturing images from the front camera without opening the camera application in android

My problem is that I can only capture using Intent to start the camera and press a button to capture the image. Is it possible to do this automatically without clicking a button, or what codes can I add for this? thanks in advance.

Answer 1

public class CameraView extends Activity implements SurfaceHolder.Callback, OnClickListener{ private static final String TAG = "CameraTest"; Camera mCamera; boolean mPreviewRunning = false; @SuppressWarnings("deprecation") public void onCreate(Bundle icicle){ super.onCreate(icicle); Log.e(TAG, "onCreate"); getWindow().setFormat(PixelFormat.TRANSLUCENT); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.cameraview); ImageView img = (ImageView) findViewById(R.id.blankImage); if(CaptureCameraImage.isBlack) img.setBackgroundResource(android.R.color.black); else img.setBackgroundResource(android.R.color.white); mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera); mSurfaceView.setOnClickListener(this); mSurfaceHolder = mSurfaceView.getHolder(); mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState){ super.onRestoreInstanceState(savedInstanceState); } Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { // TODO Auto-generated method stub if (data != null){ //Intent mIntent = new Intent(); //mIntent.putExtra("image",imageData); mCamera.stopPreview(); mPreviewRunning = false; mCamera.release(); try{ BitmapFactory.Options opts = new BitmapFactory.Options(); Bitmap bitmap= BitmapFactory.decodeByteArray(data, 0, data.length,opts); bitmap = Bitmap.createScaledBitmap(bitmap, 300, 300, false); int width = bitmap.getWidth(); int height = bitmap.getHeight(); int newWidth = 300; int newHeight = 300; // calculate the scale - in this case = 0.4f float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; // createa matrix for the manipulation Matrix matrix = new Matrix(); // resize the bit map matrix.postScale(scaleWidth, scaleHeight); // rotate the Bitmap matrix.postRotate(-90); Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); CaptureCameraImage.image.setImageBitmap(resizedBitmap); }catch(Exception e){ e.printStackTrace(); } //StoreByteImage(mContext, imageData, 50,"ImageName"); //setResult(FOTO_MODE, mIntent); setResult(585); finish(); } } }; protected void onResume(){ Log.e(TAG, "onResume"); super.onResume(); } protected void onSaveInstanceState(Bundle outState){ super.onSaveInstanceState(outState); } protected void onStop(){ Log.e(TAG, "onStop"); super.onStop(); } @TargetApi(9) public void surfaceCreated(SurfaceHolder holder){ Log.e(TAG, "surfaceCreated"); mCamera = Camera.open(CaptureCameraImage.cameraID); } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { Log.e(TAG, "surfaceChanged"); // XXX stopPreview() will crash if preview is not running if (mPreviewRunning){ mCamera.stopPreview(); } Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(300, 300); if(CaptureCameraImage.cameraID == 0){ String stringFlashMode = p.getFlashMode(); if (stringFlashMode.equals("torch")) p.setFlashMode("on"); // Light is set off, flash is set to normal 'on' mode else p.setFlashMode("torch"); } mCamera.setParameters(p); try{ mCamera.setPreviewDisplay(holder); }catch (Exception e){ // TODO Auto-generated catch block e.printStackTrace(); } mCamera.startPreview(); mPreviewRunning = true; mCamera.takePicture(null, mPictureCallback, mPictureCallback); } public void surfaceDestroyed(SurfaceHolder holder) { Log.e(TAG, "surfaceDestroyed"); //mCamera.stopPreview(); //mPreviewRunning = false; //mCamera.release(); } private SurfaceView mSurfaceView; private SurfaceHolder mSurfaceHolder; public void onClick(View v) { // TODO Auto-generated method stub mCamera.takePicture(null, mPictureCallback, mPictureCallback); } } 

You need to call this action. Also check the line below the mCamera.takePicture code (null, mPictureCallback, mPictureCallback); It was called twice 1) If you want user interaction to be performed with the image, you need to make the first entry 2) If you do not want user interaction (he will take a picture as soon as it starts) you can find the whole project in

https://github.com/sandipmjadhav/CaptureImage

thanks

Answer 2

Yes, you can take pictures automatically without pressing the capture button. Your activity that you are about to capture should be extends Activity and implements PictureCallback, ShutterCallback .

You should use the following method

 videoPreview.getCamera().takePicture(this, null, this); 

videoPreview is an instance of the class I created that extends SurfaceView and implements SurfaceHolder.Callback

Camera.open(); also located in class VideoPriview