Example usage for android.hardware Camera open

Introduction

In this page you can find the example usage for android.hardware Camera open.

Prototype

public static Camera open(int cameraId) 

Source Link

Document

Creates a new Camera object to access a particular hardware camera.

Usage

From source file:cn.pjt.rxjava.camera.CameraPreviewFragment.java

/**
 * A safe way to get an instance of the Camera object.
 *//*www.jav a2  s  .c  o  m*/
public static Camera getCameraInstance(int cameraId) {
    Camera c = null;
    try {
        c = Camera.open(cameraId); // attempt to get a Camera instance
    } catch (Exception e) {
        // Camera is not available (in use or does not exist)
        Log.d(TAG, "Camera " + cameraId + " is not available: " + e.getMessage());
    }
    return c; // returns null if camera is unavailable
}

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From source file:com.actionbarsherlock.sample.hcgallery.CameraFragment.java

@Override
public void onResume() {
    super.onResume();

    // Open the default i.e. the first rear facing camera.
    mCamera = Camera.open(mDefaultCameraId);
    mCameraCurrentlyLocked = mDefaultCameraId;
    mPreview.setCamera(mCamera);/*from   w  ww. ja  v a2s  . c o  m*/
}

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From source file:com.ezartech.ezar.flashlight.Flashlight.java

private void init(final CallbackContext callbackContext) {
    this.callbackContext = callbackContext;

    if (!PermissionHelper.hasPermission(this, permissions[0])) {
        PermissionHelper.requestPermission(this, CAMERA_SEC, Manifest.permission.CAMERA);
        return;/*from   w ww.  j  ava 2 s . co  m*/
    }

    JSONObject jsonResult = new JSONObject();

    try {
        jsonResult.put("back", false);

        int mNumberOfCameras = Camera.getNumberOfCameras();

        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
        for (int id = 0; id < mNumberOfCameras; id++) {
            Camera.getCameraInfo(id, cameraInfo);

            if (cameraInfo.facing != CameraInfo.CAMERA_FACING_BACK) {
                continue;
            }

            Parameters parameters;
            Camera camera = null;
            Camera releasableCamera = null;
            try {

                try {
                    if (id != voCameraId) {
                        camera = Camera.open(id);
                    } else {
                        camera = voCamera;
                    }

                } catch (RuntimeException re) {
                    System.out.println("Failed to open CAMERA: " + id);
                    continue;
                }

                parameters = camera.getParameters();

                List<String> torchModes = parameters.getSupportedFlashModes();
                boolean hasLight = torchModes != null && torchModes.contains(Parameters.FLASH_MODE_TORCH);

                if (hasLight) {
                    String key = "back";
                    cameraId = id;
                    ;
                    jsonResult.put(key, true);
                }

                //determine if camera should be released
                if (id != voCameraId) {
                    releasableCamera = camera;
                }

            } finally {
                if (releasableCamera != null) {
                    releasableCamera.release();
                }
            }
        }
    } catch (Exception e) {
        Log.e(TAG, "Can't set exception", e);
        callbackContext.error("Unable to access Camera for light information.");
        return;
    }

    callbackContext.success(jsonResult);
}

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From source file:com.fallahpoor.infocenter.fragments.CameraFragment.java

private Camera getCameraInstance(int cameraId) {

    Camera camera = null;//from  w ww. ja v  a2s.  c  om

    try {
        camera = Camera.open(cameraId);
    } catch (Exception ignored) {
    }

    return camera;

}

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From source file:com.actionbarsherlock.sample.hcgallery.CameraFragment.java

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
    case R.id.switch_cam:
        // Release this camera -> mCameraCurrentlyLocked
        if (mCamera != null) {
            mCamera.stopPreview();//from   www .  ja v  a 2 s .  c o m
            mPreview.setCamera(null);
            mCamera.release();
            mCamera = null;
        }

        // Acquire the next camera and request Preview to reconfigure
        // parameters.
        mCamera = Camera.open((mCameraCurrentlyLocked + 1) % mNumberOfCameras);
        mCameraCurrentlyLocked = (mCameraCurrentlyLocked + 1) % mNumberOfCameras;
        mPreview.switchCamera(mCamera);

        // Start the preview
        mCamera.startPreview();
        return true;
    case android.R.id.home:
        Intent intent = new Intent(this.getActivity(), MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        startActivity(intent);

    default:
        return super.onOptionsItemSelected(item);
    }
}

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From source file:com.jasompeter.openalpr.CameraActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_camera);

    SurfaceView surfaceView = (SurfaceView) findViewById(R.id.surface_view);
    mTorchButton = (ImageButton) findViewById(R.id.torch_button);
    mCapturingText = (TextView) findViewById(R.id.capturing_text);
    mTouchToCaptureText = (TextView) findViewById(R.id.touch_to_capture);
    mSurfaceHolder = surfaceView.getHolder();
    mSurfaceHolder.addCallback(this);
    mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    // we should not open camera on UI thread
    mCameraOpenTask = new AsyncTask<Void, Void, Void>() {
        @Override/*from  w  ww. j  a v  a  2 s.c o m*/
        protected Void doInBackground(Void[] params) {

            if (!mCameraIsOpen) {
                releaseCameraAndPreview();
                try {

                    int cameraCount = Camera.getNumberOfCameras();
                    Log.d(TAG, "We have " + cameraCount + " cameras.");
                    for (int i = 0; i < cameraCount; i++) {
                        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
                        Camera.getCameraInfo(i, cameraInfo);
                        if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
                            mCameraId = i;
                            break;
                        }
                    }

                    mCamera = Camera.open(mCameraId);
                    mCameraIsOpen = true;
                } catch (Exception e) {
                    mCameraIsOpen = false;
                    Log.d(TAG, "Failed to open camera. Camera is probably in use.");
                }
            }

            return null;
        }

        @Override
        protected void onPostExecute(Void o) {
            onCameraOpened(mCamera != null);
        }
    };

    // orientation manager handles orientation changes
    // because our activity is set to force landscape mode
    // and we may want rotate action buttons or do something with view
    mOrientationManager = new OrientationManager(this, SensorManager.SENSOR_DELAY_NORMAL, this);

    invalidateTorchButton();
    mTorchButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            toggleTorch();
        }
    });

    initializeAlpr();

    surfaceView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mEnableRecognition = true;
                mCapturingText.setVisibility(View.VISIBLE);
                mTouchToCaptureText.setVisibility(View.GONE);
                return true; // if you want to handle the touch event
            case MotionEvent.ACTION_UP:
                mEnableRecognition = false;
                mCapturingText.setVisibility(View.GONE);
                mTouchToCaptureText.setVisibility(View.VISIBLE);
                return true; // if you want to handle the touch event
            }
            return false;
        }
    });

}

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From source file:com.mobiuso.argo.ARModule.CameraSurface.java

@SuppressLint("NewApi")
@Override// ww  w. j  a va  2s. co m
public void surfaceCreated(SurfaceHolder holder) {

    Log.i(TAG, "Opening camera.");
    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
            int cameraIndex = Integer.parseInt(PreferenceManager.getDefaultSharedPreferences(getContext())
                    .getString("pref_cameraIndex", "0"));
            camera = Camera.open(cameraIndex);
        } else {
            camera = Camera.open();
        }
    } catch (RuntimeException exception) {
        Log.e(TAG, "Cannot open camera. It may be in use by another process.");
    }
    if (camera != null) {
        try {

            camera.setPreviewDisplay(holder);
            //camera.setPreviewCallback(this);
            camera.setPreviewCallbackWithBuffer(this); // API level 8 (Android 2.2)

        } catch (IOException exception) {
            Log.e(TAG, "Cannot set camera preview display.");
            camera.release();
            camera = null;
        }
    }
}

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From source file:com.wlanjie.streaming.camera.Camera1.java

private void openCamera() {
    if (mCamera != null) {
        releaseCamera();/*from  www .ja v  a 2  s  .co m*/
    }
    mCamera = Camera.open(mCameraId);
    mCameraParameters = mCamera.getParameters();
    // Supported preview sizes
    mPreviewSizes.clear();
    for (Camera.Size size : mCameraParameters.getSupportedPreviewSizes()) {
        mPreviewSizes.add(new Size(size.width, size.height));
    }
    // Supported picture sizes;
    mPictureSizes.clear();
    for (Camera.Size size : mCameraParameters.getSupportedPictureSizes()) {
        mPictureSizes.add(new Size(size.width, size.height));
    }
    // AspectRatio
    if (mAspectRatio == null) {
        mAspectRatio = Constants.DEFAULT_ASPECT_RATIO;
    }
    adjustCameraParameters();
    mCamera.setDisplayOrientation(calcCameraRotation(mDisplayOrientation));
    Camera.Size size = mCamera.getParameters().getPreviewSize();
    mCallback.onCameraOpened(size.width, size.height);
}

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From source file:com.czh.testmpeg.videorecord.CameraActivity.java

public void onResume() {
    super.onResume();
    if (!hasCamera(getApplicationContext())) {
        //???/*w ww .j a  v a  2  s .  com*/
        Toast.makeText(getApplicationContext(), R.string.dont_have_camera_error, Toast.LENGTH_SHORT).show();
        setResult(MainActivity.RESULT_CODE_FOR_RECORD_VIDEO_FAILED);
        releaseCamera();
        releaseMediaRecorder();
        finish();
    }
    if (mCamera == null) {
        releaseCamera();
        final boolean frontal = cameraFront;

        int cameraId = findFrontFacingCamera();
        if (cameraId < 0) {
            //???
            switchCameraListener = new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(CameraActivity.this, R.string.dont_have_front_camera, Toast.LENGTH_SHORT)
                            .show();
                }
            };

            //???
            cameraId = findBackFacingCamera();
            if (flash) {
                mPreview.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
                mBinding.buttonFlash.setImageResource(R.mipmap.ic_flash_on_white);
            }
        } else if (!frontal) {
            cameraId = findBackFacingCamera();
            if (flash) {
                mPreview.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
                mBinding.buttonFlash.setImageResource(R.mipmap.ic_flash_on_white);
            }
        }

        mCamera = Camera.open(cameraId);
        mPreview.refreshCamera(mCamera);
        reloadQualities(cameraId);

    }
}

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From source file:ru.jango.j0widget.camera.fragment.AbstractCameraFragment.java

/**
 * Place, where {@link android.hardware.Camera} object is obtained and configured. Reload it for
 * more configurations./*  w  w  w .  j  a  va  2s.  c om*/
 */
protected void openCamera() {
    camera = Camera.open(cameraId);

    final List<Camera.Size> sizes = camera.getParameters().getSupportedPictureSizes();
    final Camera.Size optimal = getOptimalSize(sizes);
    final Camera.Parameters params = camera.getParameters();

    params.setPictureSize(optimal.width, optimal.height);
    camera.setParameters(params);
}

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