Example usage for android.hardware Camera getNumberOfCameras

Introduction

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

Prototype

public native static int getNumberOfCameras();

Source Link

Document

Returns the number of physical cameras available on this device.

Usage

From source file:Main.java

/**
 * Return the back facing camera id// w  ww. j  a  v  a  2  s . c om
 * @return id of the camera
 */
public static int getCameraInformationId() {
    int cameraId = -1;
    int numberOfCameras = Camera.getNumberOfCameras();
    for (int i = 0; i < numberOfCameras; i++) {
        Camera.CameraInfo info = new Camera.CameraInfo();
        Camera.getCameraInfo(i, info);
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
            cameraId = i;
            break;
        }
    }
    return cameraId;
}

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

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Create a RelativeLayout container that will hold a SurfaceView,
    // and set it as the content of our activity.
    mPreview = new Preview(this.getActivity());

    // Find the total number of cameras available
    mNumberOfCameras = Camera.getNumberOfCameras();

    // Find the ID of the default camera
    CameraInfo cameraInfo = new CameraInfo();
    for (int i = 0; i < mNumberOfCameras; i++) {
        Camera.getCameraInfo(i, cameraInfo);
        if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
            mDefaultCameraId = i;//from w  w  w  .  j  a v a 2 s  .c o m
        }
    }
    setHasOptionsMenu(mNumberOfCameras > 1);
}

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

private void populateListView(TextView msgTextView) {

    if (Camera.getNumberOfCameras() > 0) {
        mGetCameraParamsTask = new GetCameraParamsTask();
        mGetCameraParamsTask.execute();//from www .  ja va2 s . c om
    } else {
        mListView.setEmptyView(msgTextView);
        mListView = null;
    }

}

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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;// w  ww .java  2 s  .  com
    }

    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 ArrayList<ListItem> getListItems() {

    ArrayList<ListItem> items = new ArrayList<>();

    switch (Camera.getNumberOfCameras()) {
    case 1:/*from   w w w. j a v  a2  s  .  c o  m*/
        items.addAll(getCameraParams(CameraInfo.CAMERA_FACING_BACK));
        break;
    case 2:
        items.add(new HeaderListItem(getString(R.string.cam_item_back_camera)));
        items.addAll(getCameraParams(CameraInfo.CAMERA_FACING_BACK));
        items.add(new HeaderListItem(getString(R.string.cam_item_front_camera)));
        items.addAll(getCameraParams(CameraInfo.CAMERA_FACING_FRONT));
    }

    return items;

}

---

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

/**
 * ??,-1//from  w  w  w  .  j  ava2s.c o m
 *
 * @return cameraId
 */
private int findFrontFacingCamera() {
    int cameraId = -1;
    //??
    int numberOfCameras = Camera.getNumberOfCameras();
    for (int i = 0; i < numberOfCameras; i++) {
        Camera.CameraInfo info = new Camera.CameraInfo();
        Camera.getCameraInfo(i, info);
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            cameraId = i;
            cameraFront = true;
            break;
        }
    }
    return cameraId;
}

---

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

/**
 * ??,-1/*from  w w  w  .ja  va2 s .  c om*/
 *
 * @return cameraId
 */
private int findBackFacingCamera() {
    int cameraId = -1;
    //??
    int numberOfCameras = Camera.getNumberOfCameras();
    for (int i = 0; i < numberOfCameras; i++) {
        Camera.CameraInfo info = new Camera.CameraInfo();
        Camera.getCameraInfo(i, info);
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
            cameraId = i;
            cameraFront = false;
            break;
        }
    }
    return cameraId;
}

---

From source file:com.TaxiDriver.jy.CameraPreview.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Hide the window title.
    // requestWindowFeature(Window.FEATURE_NO_TITLE);
    // getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.camera);//from  www . jav  a  2  s .com

    // Create a RelativeLayout container that will hold a SurfaceView,
    // and set it as the content of our activity.
    mPreview = new Preview(this);
    ((FrameLayout) findViewById(R.id.preview)).addView(mPreview);
    buttonRetry = (Button) findViewById(R.id.buttonRetry);
    buttonSend = (Button) findViewById(R.id.buttonSend);

    buttonClick = (Button) findViewById(R.id.buttonClick);
    buttonClick.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            mCamera.takePicture(null, null, jpegCallback);

        }
    });

    // Find the total number of cameras available
    numberOfCameras = Camera.getNumberOfCameras();

    // Find the ID of the default camera
    CameraInfo cameraInfo = new CameraInfo();
    for (int i = 0; i < numberOfCameras; i++) {
        Camera.getCameraInfo(i, cameraInfo);
        if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
            defaultCameraId = i;
        }
    }
}

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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/*  w  ww  .  j  a v  a 2 s  . co 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.google.firebase.samples.apps.mlkit.java.LivePreviewActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG, "onCreate");

    setContentView(R.layout.activity_live_preview);

    preview = (CameraSourcePreview) findViewById(R.id.firePreview);
    if (preview == null) {
        Log.d(TAG, "Preview is null");
    }//from  w w w.j a  v  a 2 s . c  o  m
    graphicOverlay = (GraphicOverlay) findViewById(R.id.fireFaceOverlay);
    if (graphicOverlay == null) {
        Log.d(TAG, "graphicOverlay is null");
    }

    Spinner spinner = (Spinner) findViewById(R.id.spinner);
    List<String> options = new ArrayList<>();
    options.add(FACE_CONTOUR);
    options.add(FACE_DETECTION);
    options.add(TEXT_DETECTION);
    options.add(BARCODE_DETECTION);
    options.add(IMAGE_LABEL_DETECTION);
    options.add(CLASSIFICATION_QUANT);
    options.add(CLASSIFICATION_FLOAT);
    // Creating adapter for spinner
    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, R.layout.spinner_style, options);
    // Drop down layout style - list view with radio button
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    // attaching data adapter to spinner
    spinner.setAdapter(dataAdapter);
    spinner.setOnItemSelectedListener(this);

    ToggleButton facingSwitch = (ToggleButton) findViewById(R.id.facingSwitch);
    facingSwitch.setOnCheckedChangeListener(this);
    // Hide the toggle button if there is only 1 camera
    if (Camera.getNumberOfCameras() == 1) {
        facingSwitch.setVisibility(View.GONE);
    }

    if (allPermissionsGranted()) {
        createCameraSource(selectedModel);
    } else {
        getRuntimePermissions();
    }
}

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