@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;
}
}
}
}
/**
* Computes the average frame rate at which the preview callback is called. We will then use this
* average framerate with the MediaCodec. Blocks the thread in which this function is called.
*/
private void measureFramerate() {
final Semaphore lock = new Semaphore(0);
final Camera.PreviewCallback callback =
new Camera.PreviewCallback() {
int i = 0, t = 0;
long now, oldnow, count = 0;
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
i++;
now = System.nanoTime() / 1000;
if (i > 3) {
t += now - oldnow;
count++;
}
if (i > 20) {
mQuality.framerate = (int) (1000000 / (t / count) + 1);
lock.release();
}
oldnow = now;
}
};
mCamera.setPreviewCallback(callback);
try {
lock.tryAcquire(2, TimeUnit.SECONDS);
Log.d(TAG, "Actual framerate: " + mQuality.framerate);
if (mSettings != null) {
Editor editor = mSettings.edit();
editor.putInt(
PREF_PREFIX
+ "fps"
+ mRequestedQuality.framerate
+ ","
+ mCameraImageFormat
+ ","
+ mRequestedQuality.resX
+ mRequestedQuality.resY,
mQuality.framerate);
editor.commit();
}
} catch (InterruptedException e) {
}
mCamera.setPreviewCallback(null);
}
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 {
Camera.Parameters parameters = mCamera.getParameters();
setCameraDisplayOrientation(
((Activity) this.getContext()), Camera.CameraInfo.CAMERA_FACING_FRONT, mCamera);
mCamera.setParameters(parameters);
mCamera.setPreviewCallback(previewCallback);
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
public void start() {
mEncoder = CompressBegin(mVideoParam.width, mVideoParam.height);
mH264Buff = new byte[mVideoParam.width * mVideoParam.height * 8];
// save file first for testing
/*try {
File file = new File("/sdcard/camera1.h264");
mRaf = new RandomAccessFile(file, "rw");
} catch (Exception e) {
Log.w(TAG, e.toString());
}*/
if (mCamera != null) {
mCamera.setPreviewCallback(
new Camera.PreviewCallback() {
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
int result = CompressBuffer(mEncoder, 0, data, data.length, mH264Buff);
// Log.e(TAG, "start to send h264 data");
try {
if (result > 0 && mSocket != null && mAddress != null) {
DatagramPacket packet = new DatagramPacket(mH264Buff, result, mAddress, 5000);
mSocket.send(packet);
}
} catch (IOException e) {
Log.w(TAG, e.toString());
}
// Log.e(TAG, "send success!");
}
});
}
}
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Size size = parameters.getPreviewSize();
Image barcode = new Image(size.width, size.height, "Y800");
barcode.setData(data);
int result = scanner.scanImage(barcode);
String strScanResult = "";
if (result != 0) {
previewing = false;
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
SymbolSet syms = scanner.getResults();
for (Symbol sym : syms) {
// scanText.setText("barcode result " + sym.getData());
strScanResult += sym.getData();
barcodeScanned = true;
}
Intent myIntent = new Intent(MainActivity.this, ValidateBarCodeResult.class);
myIntent.putExtra("barcode_result", strScanResult);
startActivity(myIntent);
}
}
/**
* Sets the up camera to be connected to GPUImage to get a filtered preview.
*
* @param camera the camera
* @param degrees by how many degrees the image should be rotated
* @param flipHorizontal if the image should be flipped horizontally
* @param flipVertical if the image should be flipped vertically
*/
public void setUpCamera(
final Camera camera,
final int degrees,
final boolean flipHorizontal,
final boolean flipVertical) {
mGlSurfaceView.setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.GINGERBREAD_MR1) {
setUpCameraGingerbread(camera);
} else {
camera.setPreviewCallback(mRenderer);
camera.startPreview();
}
Rotation rotation = Rotation.NORMAL;
switch (degrees) {
case 90:
rotation = Rotation.ROTATION_90;
break;
case 180:
rotation = Rotation.ROTATION_180;
break;
case 270:
rotation = Rotation.ROTATION_270;
break;
}
mRenderer.setRotationCamera(rotation, flipHorizontal, flipVertical);
}
private void initCamera() {
if (!isPreview) {
camera = Camera.open();
}
if (camera != null && !isPreview) {
streamIt = new StreamIt();
try {
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(screenWidth, screenHeight); // 设置预览照片的大小
parameters.setPreviewFpsRange(20, 30); // 每秒显示20~30帧
parameters.setPictureFormat(ImageFormat.NV21); // 设置图片格式
parameters.setPictureSize(screenWidth, screenHeight); // 设置照片的大小
camera.setPreviewDisplay(surfaceHolder); // 通过SurfaceView显示取景画面
camera.setPreviewCallback(streamIt); // 设置回调的类
camera.startPreview(); // 开始预览
camera.autoFocus(null); // 自动对焦
} catch (Exception e) {
e.printStackTrace();
}
isPreview = true;
Thread postThread2 = new Thread(new postThread());
postThread2.start();
System.out.println("线程启动了@@@@@@@@@@@@@@@@@@@@@@@@@@");
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
/*
* 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
}
try {
// Hard code camera surface rotation 90 degs to match Activity view in portrait
mCamera.setDisplayOrientation(90);
mCamera.setPreviewDisplay(mHolder);
mCamera.setPreviewCallback(previewCallback);
mCamera.startPreview();
mCamera.autoFocus(autoFocusCallback);
} catch (Exception e) {
Log.d("DBG", "Error starting camera preview: " + e.getMessage());
}
}
private void changeMes() {
preview.removeAllViews();
mCamera.setPreviewCallback(new PreviewCallback(tv_values3, preview));
mCamera.startPreview();
mPreview = new CameraPreview(this, mCamera);
preview.addView(mPreview);
}
private void startPreview() {
if (mPausing || mMainActivity.isFinishing()) return;
ensureCameraDevice();
// If we're previewing already, stop the preview first (this will blank
// the screen).
if (mPreviewing) stopPreview();
setPreviewDisplay(mSurfaceHolder);
setCameraParameters();
// mCameraDevice.setPreviewCallback(mPreviewCallback);
mCameraDevice.setPreviewCallback(cb);
try {
Log.v(TAG, "startPreview");
mCameraDevice.startPreview();
} catch (Throwable ex) {
closeCamera();
throw new RuntimeException("startPreview failed", ex);
}
mPreviewing = true;
mStatus = IDLE;
}
private void setPreviewCallback() {
if (mCamera == null) {
android.util.Log.e("MOSYNC INTERNAL", "No Preview set");
return;
}
try {
// We have to use and static instance of the camera in the reflection here
mSetPreviewCallbackWithBuffer =
mCamera
.getClass()
.getMethod("setPreviewCallbackWithBuffer", Camera.PreviewCallback.class);
Camera.Parameters parameters = getCurrentParameters();
Camera.Size size = parameters.getPreviewSize();
mCallbackBuffer = new byte[size.width * size.height * 4];
mCamera.addCallbackBuffer(mCallbackBuffer);
mIsUsingPreviewCallbackBuffer = true;
mCamera.setPreviewCallbackWithBuffer(previewCallback);
} catch (NoSuchMethodException nsme) {
mIsUsingPreviewCallbackBuffer = false;
mCamera.setPreviewCallback(previewCallback);
}
}
public void onPreviewFrame(byte[] data, Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = parameters.getPreviewSize();
Image barcode = new Image(size.width, size.height, "Y800");
barcode.setData(data);
int result = mScanner.scanImage(barcode);
if (result != 0) {
mCamera.cancelAutoFocus();
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mPreviewing = false;
SymbolSet syms = mScanner.getResults();
for (Symbol sym : syms) {
String symData = sym.getData();
if (!TextUtils.isEmpty(symData)) {
Intent dataIntent = new Intent();
dataIntent.putExtra(SCAN_RESULT, symData);
dataIntent.putExtra(SCAN_RESULT_TYPE, sym.getType());
setResult(Activity.RESULT_OK, dataIntent);
finish();
break;
}
}
}
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, acquire the camera and tell it where
// to draw.
camera = Camera.open();
try {
camera.setPreviewDisplay(holder);
camera.setPreviewCallback(
new PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera arg1) {
FileOutputStream outStream = null;
try {
outStream =
new FileOutputStream(
String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d(TAG, "onPreviewFrame - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Preview.this.invalidate();
}
});
} catch (IOException e) {
e.printStackTrace();
}
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
mContext = CameraActivity.this;
mUsersSQL = "select a.[CORPNO], a.[OPERNO], a.[OPERPASS] from b_opera a;";
mSearchUsersSQL = "select count(*) from b_opera a where a.[CORPNO] = ? and a.[OPERNO] = ?;";
mInsertOperaSQL = "INSERT INTO B_OPERA (CORPNO, OPERNO, OPERPASS) VALUES(?, ?, ?, ?, ?);";
mInsertDownInfoSQL =
"INSERT INTO B_LOGININFO (CORPNO, PROJDESC, DOWNURL, UPLOADURL, DBFILENAME, DOWNTIME) VALUES(?, ?, ?, ?, ?, ?);";
mDownLoadInfoSQL =
"select a.[CORPNO], a.[PROJDESC], a.[DOWNURL], a.[UPLOADURL], a.[DBFILENAME] from b_logininfo a;";
autoFocusHandler = new Handler();
mCamera = getCameraInstance();
/* Instance barcode scanner */
scanner = new ImageScanner();
scanner.setConfig(0, Config.X_DENSITY, 3);
scanner.setConfig(0, Config.Y_DENSITY, 3);
Log.i(TAG, "CameraActivity onCreate()");
mPreview = new CameraPreview(this, mCamera, previewCb, autoFocusCB);
FrameLayout preview = (FrameLayout) findViewById(R.id.cameraPreview);
preview.addView(mPreview);
mCamera.setPreviewCallback(previewCb);
mCamera.startPreview();
previewing = true;
mCamera.autoFocus(autoFocusCB);
// 初始化声音和震动
AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
// 如果手机是震动模式就震动
if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
playBeep = false;
}
// 初始化声音
initBeepSound();
initLoginDataBase();
// MyApp.showToast(CameraActivity.this, "hello");
Button mButtonBack = (Button) findViewById(R.id.button_back);
/*返回按钮*/
mButtonBack.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.putExtra("downloadfile", "");
setResult(RESULT_OK, intent);
finish();
}
});
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub
mDetection.setOnDetectionListener(null);
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// 空，记得在activity中释放摄像头
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release(); // 加上这句，就OK！
mCamera = null;
}
public void onPause() {
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
private void releaseCamera() {
if (mCamera != null) {
previewing = false;
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
}
}
private void stopPreview() {
if (mCameraDevice != null && mPreviewing) {
Log.v(TAG, "stopPreview");
mCameraDevice.setPreviewCallback(null);
mCameraDevice.stopPreview();
}
mPreviewing = false;
}
// 释放相机占用的系统资源
private void releaseCamera() {
if (camera != null) {
camera.setPreviewCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
}
// Called when the holder is destroyed
public void surfaceDestroyed(SurfaceHolder holder) {
if (camera != null) {
camera.stopPreview();
camera.setPreviewCallback(null);
camera.release();
camera = null;
}
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
/** {@inheritDoc} */
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
camera.setPreviewCallback(previewCallback);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback", "Exception in setPreviewDisplay()", t);
}
}
public void closeCamera() {
if (camera == null) {
return;
}
camera.setPreviewCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
private void releaseCamera() {
if (mCamera != null) {
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
Log.d("", "release preview Camera");
}
}
/** 停止拍摄 */
public void stopCapture() {
start_flag = false;
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
/** {@inheritDoc} */
@Override
public void onPause() {
super.onPause();
camera.setPreviewCallback(null);
if (inPreview) camera.stopPreview();
inPreview = false;
camera.release();
camera = null;
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
if (mCamera != null) {
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
}
}
/**
* A single preview frame will be returned to the handler supplied. The data will arrive as byte[]
* in the message.obj field, with width and height encoded as message.arg1 and message.arg2,
* respectively.
*
* @param handler The handler to send the message to.
* @param message The what field of the message to be sent.
*/
public void requestPreviewFrame(Handler handler, int message) {
if (camera != null && previewing) {
previewCallback.setHandler(handler, message);
if (useOneShotPreviewCallback) {
camera.setOneShotPreviewCallback(previewCallback);
} else {
camera.setPreviewCallback(previewCallback);
}
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(holder);
camera.startPreview();
camera.setPreviewCallback(this);
} catch (Exception e) {
debug("surfaceCreated() error!");
}
}
