public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
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);
// reference former
Camera.Parameters parameters = mCamera.getParameters();
int capWidth = parameters.getPreviewSize().width;
int capHeight = parameters.getPreviewSize().height;
// android.graphics.imageformat
int pixelformat = parameters.getPreviewFormat();
PixelFormat pixelinfo = new PixelFormat();
PixelFormat.getPixelFormatInfo(pixelformat, pixelinfo);
int cameraIndex = 0;
boolean frontFacing = false;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
Camera.getCameraInfo(cameraIndex, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
frontFacing = true;
}
// For the default NV21 format, bitsPerPixel = 12.
int bufSize = capWidth * capHeight * pixelinfo.bitsPerPixel / 8;
for (int i = 0; i < 5; i++) {
mCamera.addCallbackBuffer(new byte[bufSize]);
}
mCamera.startPreview();
nftSimpleActivity.nativeVideoInit(capWidth, capHeight, cameraIndex, frontFacing);
} catch (Exception e) {
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
/** 开启相机拍摄 */
public void startCapture() {
try {
cameraInfo = new CameraInfo();
if (mCamera == null) {
// mCamera = Camera.open();
camera_count = Camera.getNumberOfCameras();
Log.e(TAG, "camera count:" + camera_count);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
for (int i = 0; i < camera_count; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
// find front camera
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
Log.e(TAG, "to open front camera");
mCamera = Camera.open(i);
Camera.getCameraInfo(i, cameraInfo);
}
}
}
if (mCamera == null) {
Log.e(TAG, "AAAAA OPEN camera");
mCamera = Camera.open();
Camera.getCameraInfo(0, cameraInfo);
}
}
mCamera.stopPreview();
mParameters = mCamera.getParameters();
if (isScreenOriatationPortrait()) {
if (cameraInfo.orientation == 270 || cameraInfo.orientation == 0)
mCamera.setDisplayOrientation(90);
if (cameraInfo.orientation == 90) mCamera.setDisplayOrientation(270);
} else {
if (cameraInfo.orientation == 90) mCamera.setDisplayOrientation(180);
}
mParameters.setPreviewSize(mwidth, mheight);
mParameters.setPreviewFrameRate(15);
mCamera.setParameters(mParameters);
int mformat = mParameters.getPreviewFormat();
int bitsperpixel = ImageFormat.getBitsPerPixel(mformat);
Log.e(TAG, "pzy bitsperpixel: " + bitsperpixel);
yuv_frame = new byte[mwidth * mheight * bitsperpixel / 8];
yuv_Rotate90 = new byte[mwidth * mheight * bitsperpixel / 8];
// yuv_Rotate90lr = new byte[mwidth * mheight * bitsperpixel / 8];
mCamera.addCallbackBuffer(yuv_frame);
// mCamera.setPreviewDisplay(holder);
mCamera.setPreviewDisplay(localSurfaceHolder);
mCamera.setPreviewCallbackWithBuffer(this);
EMVideoCallHelper.getInstance().setResolution(mwidth, mheight);
mCamera.startPreview();
Log.d(TAG, "camera start preview");
} catch (Exception e) {
e.printStackTrace();
if (mCamera != null) mCamera.release();
}
}
@Override
public void alignCameraAndDisplayOrientation(WindowManager windowManager) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(id, info);
int rotation = windowManager.getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
void setCameraDisplayOrientation(int cameraId) {
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result = 0;
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(cameraId, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
result = ((360 - degrees) + info.orientation);
} else if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
result = ((360 - degrees) - info.orientation);
result += 360;
}
result = result % 360;
camera.setDisplayOrientation(result);
}
/** Opens a rear-facing camera with {@link Camera#open(int)}, if one exists, or opens camera 0. */
public static Camera open() {
int numCameras = Camera.getNumberOfCameras();
if (numCameras == 0) {
Log.w(TAG, "No cameras!");
return null;
}
int index = 0;
while (index < numCameras) {
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
Camera.getCameraInfo(index, cameraInfo);
// CAMERA_FACING_BACK：手机背面的摄像头
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
break;
}
index++;
}
Camera camera;
if (index < numCameras) {
Log.i(TAG, "Opening camera #" + index);
camera = Camera.open(index);
} else {
Log.i(TAG, "No camera facing back; returning camera #0");
camera = Camera.open(0);
}
return camera;
}
/** A safe way to get an instance of the Camera object. */
public static Camera getCameraInstance() {
/*
Camera c = null;
try {
c = Camera.open();
} catch (Exception e) {
}
return c;
*/
int cameraCount = 0;
Camera cam = null;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
// Log.e("Your_TAG", "Camera failed to open: " + e.getLocalizedMessage());
e.printStackTrace();
}
}
}
return cam;
}
@SuppressWarnings("WrongConstant")
private void setCameraDisplayOrientation(Camera.Parameters parameters) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(getCurrentCameraId(), info);
final int deviceOrientation = Degrees.getDisplayRotation(getActivity());
mDisplayOrientation =
Degrees.getDisplayOrientation(
info.orientation,
deviceOrientation,
info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT);
Log.d(
"CameraFragment",
String.format(
"Orientations: Sensor = %d˚, Device = %d˚, Display = %d˚",
info.orientation, deviceOrientation, mDisplayOrientation));
int previewOrientation;
if (CameraUtil.isArcWelder()) {
previewOrientation = 0;
} else {
previewOrientation = mDisplayOrientation;
if (Degrees.isPortrait(deviceOrientation)
&& getCurrentCameraPosition() == CAMERA_POSITION_FRONT)
previewOrientation = Degrees.mirror(mDisplayOrientation);
}
parameters.setRotation(previewOrientation);
mCamera.setDisplayOrientation(previewOrientation);
}
/* 確認裝置是否有前置鏡頭 */
private boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)) {
// this device has a camera
return true;
} else {
// no camera on this device
return false;
}
}
// /* 開啟相機前至鏡頭設置 */
private Camera openFrontFacingCameraGingerbread() {
int cameraCount = 0;
Camera cam = null;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (checkCameraHardware(MainActivity.this)) {
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());
}
}
if (!checkCameraHardware(MainActivity.this)) {
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());
}
}
}
}
}
return cam;
}
@Kroll.method
@Kroll.getProperty
public int[] getAvailableCameras() {
int cameraCount = Camera.getNumberOfCameras();
if (cameraCount == 0) {
return null;
}
int[] result = new int[cameraCount];
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, cameraInfo);
switch (cameraInfo.facing) {
case CameraInfo.CAMERA_FACING_FRONT:
result[i] = CAMERA_FRONT;
break;
case CameraInfo.CAMERA_FACING_BACK:
result[i] = CAMERA_REAR;
break;
default:
// This would be odd. As of API level 17,
// there are just the two options.
result[i] = -1;
}
}
return result;
}
private int getCameraOrientation() {
Camera.CameraInfo info = new Camera.CameraInfo();
for (int i = 0; i < Camera.getNumberOfCameras(); i++) {
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) break;
}
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
return (info.orientation - degrees + 360) % 360;
}
public int getDisplayOrientation() {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
int rotation = display.getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
return result;
}
public static void setCameraDisplayOrientation(
Activity activity, int cameraId, android.hardware.Camera camera) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
public CustomeCamera(
Activity activity, FrameLayout cameraPreviewLayout, Integer size, Integer quality)
throws Exception {
this.activity = activity;
this.size = size;
this.quality = quality;
// Create an instance of Camera
try {
mCamera = getCameraInstance();
} catch (Exception e) {
throw new Exception(e.getMessage());
}
try {
mCamera.setDisplayOrientation(90);
} catch (Exception e) {
Log.d(TAG, e.getMessage());
}
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break; // Natural orientation
case Surface.ROTATION_90:
degrees = 90;
break; // Landscape left
case Surface.ROTATION_180:
degrees = 180;
break; // Upside down
case Surface.ROTATION_270:
degrees = 270;
break; // Landscape right
}
int rotate = (info.orientation - degrees + 360) % 360;
// STEP #2: Set the 'rotation' parameter
Camera.Parameters params = mCamera.getParameters();
params.setRotation(rotate);
List<String> focusModes = params.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
}
if (params.getFocusMode() == Camera.Parameters.FOCUS_MODE_AUTO) autoFocusEnabled = true;
else autoFocusEnabled = false;
// TODO for the test
autoFocusEnabled = false;
mCamera.setParameters(params);
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraPreview(activity, mCamera);
cameraPreviewLayout.addView(mPreview);
}
public boolean doesZoomReallyWork() {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(getHost().getCameraId(), info);
return (getHost()
.getDeviceProfile()
.doesZoomActuallyWork(info.facing == CameraInfo.CAMERA_FACING_FRONT));
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
boolean getBackCameraStatus() {
Camera.CameraInfo ci = new Camera.CameraInfo();
for (int i = 0; i < Camera.getNumberOfCameras(); i++) {
Camera.getCameraInfo(i, ci);
if (ci.facing == Camera.CameraInfo.CAMERA_FACING_BACK) return true;
}
return false; // No front-facing camera found
}
private void setBackCameraId() {
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < Camera.getNumberOfCameras(); i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
backCameraId = i;
}
}
}
/**
* Gets the id for the camera specified by the direction it is facing. Returns -1 if no such
* camera was found.
*
* @param facing the desired camera (front-facing or rear-facing)
*/
private static int getIdForRequestedCamera(int facing) {
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < Camera.getNumberOfCameras(); ++i) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == facing) {
return i;
}
}
return -1;
}
/**
* Returns true if camcorder profile exists for the first back-facing camera at the given quality
* level.
*
* @param quality the target quality level for the camcorder profile
*/
public static boolean hasProfile(int quality) {
int numberOfCameras = Camera.getNumberOfCameras();
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < numberOfCameras; i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
return hasProfile(i, quality);
}
}
return false;
}
/**
* Opens a camera, and attempts to establish preview mode at the specified width and height.
*
* <p>Sets mCameraPreviewWidth and mCameraPreviewHeight to the actual width/height of the preview.
*/
private void openCamera(int desiredWidth, int desiredHeight) {
if (mCamera != null) {
throw new RuntimeException("camera already initialized");
}
Camera.CameraInfo info = new Camera.CameraInfo();
// Try to find a back-facing camera (e.g. for videoconferencing).
int numCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numCameras; i++) {
Camera.getCameraInfo(i, info);
// if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { //TODO: front
// facing
if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
mCamera = Camera.open(i);
break;
}
}
if (mCamera == null) {
Log.d(TAG, "No front-facing camera found; opening default");
mCamera = Camera.open(); // opens first back-facing camera
}
if (mCamera == null) {
throw new RuntimeException("Unable to open camera");
}
mCamera.setDisplayOrientation(90); // TODO: set according to front or back facing
Camera.Parameters parms = mCamera.getParameters();
// parms.setRotation(180);
CameraUtils.choosePreviewSize(parms, desiredWidth, desiredHeight);
// Give the camera a hint that we're recording video. This can have a big
// impact on frame rate.
parms.setRecordingHint(true);
// leave the frame rate set to default
mCamera.setParameters(parms);
int[] fpsRange = new int[2];
Camera.Size mCameraPreviewSize = parms.getPreviewSize();
parms.getPreviewFpsRange(fpsRange);
String previewFacts = mCameraPreviewSize.width + "x" + mCameraPreviewSize.height;
if (fpsRange[0] == fpsRange[1]) {
previewFacts += " @" + (fpsRange[0] / 1000.0) + "fps";
} else {
previewFacts += " @[" + (fpsRange[0] / 1000.0) + " - " + (fpsRange[1] / 1000.0) + "] fps";
}
TextView text = (TextView) findViewById(R.id.cameraParams_text);
text.setText(previewFacts);
mCameraPreviewWidth = mCameraPreviewSize.width;
mCameraPreviewHeight = mCameraPreviewSize.height;
}
/**
* Sets the camera that will be used to capture video. You can call this method at any time and
* changes will take effect next time you start the stream.
*
* @param camera Can be either CameraInfo.CAMERA_FACING_BACK or CameraInfo.CAMERA_FACING_FRONT
*/
public void setCamera(int camera) {
CameraInfo cameraInfo = new CameraInfo();
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == camera) {
mCameraId = i;
break;
}
}
}
@SuppressLint("NewApi")
public void changeCameraFacing() {
// 切换前后摄像头
int cameraCount = 0;
CameraInfo cameraInfo = new CameraInfo();
cameraCount = Camera.getNumberOfCameras(); // 得到摄像头的个数
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, cameraInfo); // 得到每一个摄像头的信息
if (cameraPosition == 1) {
// 现在是后置，变更为前置
if (cameraInfo.facing
== Camera.CameraInfo
.CAMERA_FACING_FRONT) { // 代表摄像头的方位，CAMERA_FACING_FRONT前置 CAMERA_FACING_BACK后置
mCamera.setPreviewCallback(null);
mCamera.stopPreview(); // 停掉原来摄像头的预览
mCamera.release(); // 释放资源
mCamera = null; // 取消原来摄像头
mCamera = Camera.open(i); // 打开当前选中的摄像头
try {
mCamera.setPreviewDisplay(mHolder); // 通过surfaceview显示取景画面
initParameters();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview(); // 开始预览
cameraPosition = 0;
break;
}
} else {
// 现在是前置， 变更为后置
if (cameraInfo.facing
== Camera.CameraInfo
.CAMERA_FACING_BACK) { // 代表摄像头的方位，CAMERA_FACING_FRONT前置 CAMERA_FACING_BACK后置
mCamera.setPreviewCallback(null);
mCamera.stopPreview(); // 停掉原来摄像头的预览
mCamera.release(); // 释放资源
mCamera = null; // 取消原来摄像头
mCamera = Camera.open(i); // 打开当前选中的摄像头
try {
mCamera.setPreviewDisplay(mHolder); // 通过surfaceview显示取景画面
initParameters();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview(); // 开始预览
cameraPosition = 1;
break;
}
}
}
}
private int getCameraId(final int facing) {
int numberOfCameras = Camera.getNumberOfCameras();
Camera.CameraInfo info = new Camera.CameraInfo();
for (int id = 0; id < numberOfCameras; id++) {
Camera.getCameraInfo(id, info);
if (info.facing == facing) {
return id;
}
}
return -1;
}
/**
* 得到旋转图片的角度
*
* @return
*/
private int getRotate() {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(cameraCurrentlyLocked, info);
int r = 0;
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
r = (info.orientation - picture_orientation + 360) % 360;
} else {
r = (info.orientation + picture_orientation) % 360;
}
return r;
}
/**
* Returns the camcorder profile for the first back-facing camera on the device at the given
* quality level. If the device has no back-facing camera, this returns null.
*
* @param quality the target quality level for the camcorder profile
*/
public static CamcorderProfile get(int quality) {
int numberOfCameras = Camera.getNumberOfCameras();
CameraInfo cameraInfo = new CameraInfo();
for (int i = 0; i < numberOfCameras; i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) {
return get(i, quality);
}
}
return (numberOfCameras == 1) ? get(0, quality) : null;
}
private boolean tryCreateCamera(int facing) {
Camera.CameraInfo info = new Camera.CameraInfo();
for (int nCam = 0; nCam < Camera.getNumberOfCameras(); nCam++) {
Camera.getCameraInfo(nCam, info);
if (info.facing == facing) {
camera = Camera.open(nCam);
cameraInfo = info;
return true;
}
}
return false;
}
/**
* Possible Picture Orientation fix
*
* @param param
* @param orientation
*/
public void onOrientationChanged(Parameters param, int orientation) {
if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) return;
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(0, info);
orientation = (orientation + 45) / 90 * 90;
int rotation = 0;
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
rotation = (info.orientation - orientation + 360) % 360;
} else { // back-facing camera
rotation = (info.orientation + orientation) % 360;
}
param.setRotation(rotation);
}
public int getCameraRotation(int cameraId) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
mOrientation = (mOrientation + 45) / 90 * 90;
int rotation = 0;
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
rotation = (info.orientation - mOrientation + 360) % 360;
} else { // back-facing camera
rotation = (info.orientation + mOrientation) % 360;
}
return rotation;
}
/**
* Checks whether this device support a front camera.
*
* @return true if this device support a front camera, false otherwise
*/
public static boolean hasFrontFacingDevice() {
for (int i = 0; i < Camera.getNumberOfCameras(); ++i) {
Camera.CameraInfo info = new Camera.CameraInfo();
try {
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
return true;
}
} catch (Exception e) {
// do nothing.
}
}
return false;
}
private int getDisplayOrientation(int degrees, int cameraId) {
// See android.hardware.Camera.setDisplayOrientation for
// documentation.
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
return result;
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
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;
break;
}
}
return cameraId;
}
