How can draw rectangle on camera preview?

How can draw rectangle on camera preview? - android

Hi aim working n android application to detect page number using camera preview.
After i received frame from OnPreviewFrame i'm doing real time image processing using opencv to find page number position .Now my question is How can i draw rectangle on surface View ?

Use this code
PreviewDemo.java
public class PreviewDemo extends Activity implements OnClickListener {
private SurfaceView preview = null;
private SurfaceHolder previewHolder = null;
private Camera camera = null;
private boolean inPreview = false;
ImageView image;
Bitmap bmp, itembmp;
static Bitmap mutableBitmap;
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
File imageFileName = null;
File imageFileFolder = null;
private MediaScannerConnection msConn;
Display d;
int screenhgt, screenwdh;
ProgressDialog dialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.preview);
image = (ImageView) findViewById(R.id.image);
preview = (SurfaceView) findViewById(R.id.surface);
previewHolder = preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
previewHolder.setFixedSize(getWindow().getWindowManager()
.getDefaultDisplay().getWidth(), getWindow().getWindowManager()
.getDefaultDisplay().getHeight());
}
#Override
public void onResume() {
super.onResume();
camera = Camera.open();
}
#Override
public void onPause() {
if (inPreview) {
camera.stopPreview();
}
camera.release();
camera = null;
inPreview = false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height, Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size: parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea) {
result = size;
}
}
}
}
return (result);
}
SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(PreviewDemo.this, t.getMessage(), Toast.LENGTH_LONG)
.show();
}
}
public void surfaceChanged(SurfaceHolder holder,
int format, int width,
int height) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = getBestPreviewSize(width, height,
parameters);
if (size != null) {
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
inPreview = true;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// no-op
}
};
Camera.PictureCallback photoCallback = new Camera.PictureCallback() {
public void onPictureTaken(final byte[] data, final Camera camera) {
dialog = ProgressDialog.show(PreviewDemo.this, "", "Saving Photo");
new Thread() {
public void run() {
try {
Thread.sleep(1000);
} catch (Exception ex) {}
onPictureTake(data, camera);
}
}.start();
}
};
public void onPictureTake(byte[] data, Camera camera) {
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true);
savePhoto(mutableBitmap);
dialog.dismiss();
}
class SavePhotoTask extends AsyncTask < byte[], String, String > {#Override
protected String doInBackground(byte[]...jpeg) {
File photo = new File(Environment.getExternalStorageDirectory(), "photo.jpg");
if (photo.exists()) {
photo.delete();
}
try {
FileOutputStream fos = new FileOutputStream(photo.getPath());
fos.write(jpeg[0]);
fos.close();
} catch (java.io.IOException e) {
Log.e("PictureDemo", "Exception in photoCallback", e);
}
return (null);
}
}
public void savePhoto(Bitmap bmp) {
imageFileFolder = new File(Environment.getExternalStorageDirectory(), "Rotate");
imageFileFolder.mkdir();
FileOutputStream out = null;
Calendar c = Calendar.getInstance();
String date = fromInt(c.get(Calendar.MONTH)) + fromInt(c.get(Calendar.DAY_OF_MONTH)) + fromInt(c.get(Calendar.YEAR)) + fromInt(c.get(Calendar.HOUR_OF_DAY)) + fromInt(c.get(Calendar.MINUTE)) + fromInt(c.get(Calendar.SECOND));
imageFileName = new File(imageFileFolder, date.toString() + ".jpg");
try {
out = new FileOutputStream(imageFileName);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
scanPhoto(imageFileName.toString());
out = null;
} catch (Exception e) {
e.printStackTrace();
}
}
public String fromInt(int val) {
return String.valueOf(val);
}
public void scanPhoto(final String imageFileName) {
msConn = new MediaScannerConnection(PreviewDemo.this, new MediaScannerConnectionClient() {
public void onMediaScannerConnected() {
msConn.scanFile(imageFileName, null);
Log.i("msClient obj in Photo Utility", "connection established");
}
public void onScanCompleted(String path, Uri uri) {
msConn.disconnect();
Log.i("msClient obj in Photo Utility", "scan completed");
}
});
msConn.connect();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU && event.getRepeatCount() == 0) {
onBack();
}
return super.onKeyDown(keyCode, event);
}
public void onBack() {
Log.e("onBack :", "yes");
camera.takePicture(null, null, photoCallback);
inPreview = false;
}
#Override
public void onClick(View v) {
}
}
Preview.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<android.view.SurfaceView
android:id="#+id/surface"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</RelativeLayout>
Add the Permissions also

Related

How to take a photo using CameraSource?

I'm having some problems with CameraSource when I want to take a picture using the camera.
All i want is take a picture with a button i made on the xml file and use 'CameraSource' to take the photo because i'm using 'TextRecognizer' too.
The Camera is working fine but the problem occurs when i press the button to take a picture.
Manifest File:
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
My Variables:
SurfaceView cameraView;
TextView textView;
CameraSource camera_source;
final int RequestCameraPermissionID = 1001;
Class:
// Starting the CameraSource. This will be in the 'OnCreate' function. This function works.
private void OpenCameraSource(){
final TextRecognizer textRecognizer = new TextRecognizer.Builder(getApplicationContext()).build();
if (!textRecognizer.isOperational()) {
Log.w("Steal_Activity", "Detector activity are not yet available");
Toast.makeText(getApplicationContext(),"Detector activity are not yet available",Toast.LENGTH_SHORT).show();
} else {
camera_source = new CameraSource.Builder(getApplicationContext(),textRecognizer)
.setFacing(CameraSource.CAMERA_FACING_BACK)
.setRequestedPreviewSize(1280, 1024)
.setRequestedFps(2.0f)
.setAutoFocusEnabled(true)
.build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(Steal.this,
new String[]{android.Manifest.permission.CAMERA},
RequestCameraPermissionID);
return;
}
camera_source.start(cameraView.getHolder());
}catch (IOException ex){
ex.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
}
#Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
camera_source.stop();
}
});
textRecognizer.setProcessor(new Detector.Processor<TextBlock>() {
// Some Stuff here
}
});
}
}
// This function will be launched when the button is pressed
public void OnClick_TakeShot(View view){
try{//I GET ERROR HERE
camera_source.takePicture(null,pictureCallback);
}catch (Exception ex){
Toast.makeText(getApplicationContext(),"Error:"+ex.toString(),Toast.LENGTH_LONG).show();
}
}
// Callback for 'takePicture'
CameraSource.PictureCallback pictureCallback = new CameraSource.PictureCallback() {
#Override
public void onPictureTaken(byte[] bytes) {
File file_image = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES+"/pics");
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes , 0, bytes .length);
if(bitmap!=null){
if(!file_image.isDirectory()){
file_image.mkdir();
}
file_image=new File(file_image,"mylastpic.jpg");
try{
FileOutputStream fileOutputStream=new FileOutputStream(file_image);
bitmap.compress(Bitmap.CompressFormat.JPEG,100, fileOutputStream);
fileOutputStream.flush();
fileOutputStream.close();
}
catch(Exception exception) {
Toast.makeText(getApplicationContext(),"Error saving: "+ exception.toString(),Toast.LENGTH_LONG).show();
}
}
}
};
NOT WORKING WHEN I PRESS THE BUTTON TO TAKE PICTURE

Try using this way (i'm using OCR from Google Vision and for taking picture with CameraSource) Pd: the flash button i havent fix it yet...
YOU HAVE TO USE : compile 'com.google.android.gms:play-services-vision:9.2.1' in your dependecies for the OCR compatibility
public class CustomCamaraActivity extends BaseActivity implements Callback,
OnClickListener {
private Context context;
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Camera camera;
private Button flipCamera;
private Button flashCameraButton;
private Button captureImage;
private Button BtnCapturarFoto;
private int cameraId;
private boolean flashmode = false;
private int rotation;
private ActionBar actionBar;
private CameraSource cameraSource;
private StringBuilder builder;
private TextView txTextoCapturado;
private static CustomCamaraActivity instance;
private Activity activity;
private String nombreProyecto;
public static final int REQUEST_IMAGE_CAPTURE = 0020;
private File file;
private String ubicacion;
private static final String TAG = "FOTOGRAFIA";
private int Height = 620, Width = 480;
private TextRecognizer recognizer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom_camara_layout);
context = this;
// camera surface view created
cameraId = CameraInfo.CAMERA_FACING_BACK;
flipCamera = (Button) findViewById(R.id.flipCamera);
flashCameraButton = (Button) findViewById(R.id.flash);
captureImage = (Button) findViewById(R.id.captureImage);
BtnCapturarFoto = (Button) findViewById(R.id.btnCapturarFoto);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
txTextoCapturado = (TextView) findViewById(R.id.tvTextoCapturado);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
flipCamera.setOnClickListener(this);
captureImage.setOnClickListener(this);
flashCameraButton.setOnClickListener(this);
BtnCapturarFoto.setOnClickListener(this);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
/*if (Camera.getNumberOfCameras() > 1) {
flipCamera.setVisibility(View.VISIBLE);
}*/
if (!getBaseContext().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA_FLASH)) {
flashCameraButton.setVisibility(View.GONE);
flipCamera.setVisibility(View.GONE);
}
recognizer = new TextRecognizer.Builder(getApplicationContext()).build();
if (recognizer.isOperational()) {
cameraSource = new CameraSource.Builder(getApplicationContext(), recognizer)
.setFacing(CameraSource.CAMERA_FACING_BACK)
.setRequestedPreviewSize(1280, 1024)
.setRequestedFps(15.0f)
.setAutoFocusEnabled(true)
.build();
surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(CustomCamaraActivity.this, new String[]{Manifest.permission.CAMERA}, 100);
return;
}
try {
releaseCamera();
cameraSource.start(surfaceView.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
if(cameraSource != null){
cameraSource.stop();
}
}
});
recognizer.setProcessor(new Detector.Processor<TextBlock>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<TextBlock> detections) {
final SparseArray<TextBlock> items = detections.getDetectedItems();
if (items.size() != 0) {
builder = new StringBuilder();
for (int i = 0; i < items.size(); i++) {
TextBlock it = items.valueAt(i);
builder.append(it.getValue());
}
final String read = builder.toString().trim();
//String read = builder.toString().trim().replace(" ", "").replace("\n", "");
try{
runOnUiThread(new Runnable() {
#Override
public void run() {
txTextoCapturado.setText(read);
}
});
}catch (Exception ex){
Log.e("error","Error al actualizar texto OCR");
}
//It continues doing other things here
}
}
});
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
switch (requestCode) {
case 100:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
try {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
return;
}
cameraSource.start(surfaceView.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
}
break;
}
}
public String getUbicacion() {
return ubicacion;
}
#Override
protected void onResume() {
super.onResume();
}
#Override
protected void onPause() {
super.onPause();
if (camera != null) {
camera.setPreviewCallback(null);
camera.setErrorCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
}
#Override
public void onBackPressed() {
super.onBackPressed();
if(camera != null){
camera.setPreviewCallback(null);
camera.setErrorCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (!openCamera(CameraInfo.CAMERA_FACING_BACK)) {
alertCameraDialog();
}
}
private boolean openCamera(int id) {
boolean result = false;
cameraId = id;
//releaseCamera();
try {
camera = Camera.open(cameraId);
} catch (Exception e) {
e.printStackTrace();
}
if (camera != null) {
try {
setUpCamera(camera);
camera.setErrorCallback(new ErrorCallback() {
#Override
public void onError(int error, Camera camera) {
}
});
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
result = true;
} catch (IOException e) {
e.printStackTrace();
result = false;
releaseCamera();
}
}
return result;
}
private void setUpCamera(Camera c) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
rotation = getWindowManager().getDefaultDisplay().getRotation();
int degree = 0;
switch (rotation) {
case Surface.ROTATION_0:
degree = 0;
break;
case Surface.ROTATION_90:
degree = 90;
break;
case Surface.ROTATION_180:
degree = 180;
break;
case Surface.ROTATION_270:
degree = 270;
break;
default:
break;
}
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
// frontFacing
rotation = (info.orientation + degree) % 330;
rotation = (360 - rotation) % 360;
} else {
// Back-facing
rotation = (info.orientation - degree + 360) % 360;
}
c.setDisplayOrientation(rotation);
Parameters params = c.getParameters();
showFlashButton(params);
List<String> focusModes = params.getSupportedFlashModes();
if (focusModes != null) {
if (focusModes
.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
params.setFlashMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}
}
params.setRotation(rotation);
}
private void showFlashButton(Parameters params) {
boolean showFlash = (getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA_FLASH) && params.getFlashMode() != null)
&& params.getSupportedFlashModes() != null
&& params.getSupportedFocusModes().size() > 1;
flashCameraButton.setVisibility(showFlash ? View.VISIBLE
: View.INVISIBLE);
}
private void releaseCamera() {
try {
if (camera != null) {
camera.setPreviewCallback(null);
camera.setErrorCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("error", e.toString());
camera = null;
}
}
private void releaseCameraSource() {
try {
if (cameraSource != null) {
cameraSource.stop();
cameraSource.release();
cameraSource = null;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("error", e.toString());
cameraSource = null;
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.flash:
flashOnButton();
break;
case R.id.flipCamera:
flipCamera();
break;
case R.id.captureImage:
takeImage();
break;
case R.id.btnCapturarFoto:
takeImage();
break;
default:
break;
}
}
private void takeImage() {
try{
//openCamera(CameraInfo.CAMERA_FACING_BACK);
//releaseCameraSource();
//releaseCamera();
//openCamera(CameraInfo.CAMERA_FACING_BACK);
//setUpCamera(camera);
//Thread.sleep(1000);
cameraSource.takePicture(null, new CameraSource.PictureCallback() {
private File imageFile;
#Override
public void onPictureTaken(byte[] bytes) {
try {
// convert byte array into bitmap
Bitmap loadedImage = null;
Bitmap rotatedBitmap = null;
loadedImage = BitmapFactory.decodeByteArray(bytes, 0,
bytes.length);
// rotate Image
Matrix rotateMatrix = new Matrix();
rotateMatrix.postRotate(rotation);
rotatedBitmap = Bitmap.createBitmap(loadedImage, 0, 0,
loadedImage.getWidth(), loadedImage.getHeight(),
rotateMatrix, false);
String state = Environment.getExternalStorageState();
File folder = null;
if (state.contains(Environment.MEDIA_MOUNTED)) {
folder = new File(Environment
.getExternalStorageDirectory() + "/Demo");
} else {
folder = new File(Environment
.getExternalStorageDirectory() + "/Demo");
}
boolean success = true;
if (!folder.exists()) {
success = folder.mkdirs();
}
if (success) {
java.util.Date date = new java.util.Date();
imageFile = new File(folder.getAbsolutePath()
+ File.separator
//+ new Timestamp(date.getTime()).toString()
+ "Image.jpg");
imageFile.createNewFile();
} else {
Toast.makeText(getBaseContext(), "Image Not saved",
Toast.LENGTH_SHORT).show();
return;
}
ByteArrayOutputStream ostream = new ByteArrayOutputStream();
// save image into gallery
rotatedBitmap = resize(rotatedBitmap, 800, 600);
rotatedBitmap.compress(CompressFormat.JPEG, 100, ostream);
FileOutputStream fout = new FileOutputStream(imageFile);
fout.write(ostream.toByteArray());
fout.close();
ContentValues values = new ContentValues();
values.put(Images.Media.DATE_TAKEN,
System.currentTimeMillis());
values.put(Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.MediaColumns.DATA,
imageFile.getAbsolutePath());
CustomCamaraActivity.this.getContentResolver().insert(
Images.Media.EXTERNAL_CONTENT_URI, values);
setResult(Activity.RESULT_OK); //add this
finish();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}catch (Exception ex){
txTextoCapturado.setText("Error al capturar fotografia!");
}
}
private void flipCamera() {
int id = (cameraId == CameraInfo.CAMERA_FACING_BACK ? CameraInfo.CAMERA_FACING_FRONT
: CameraInfo.CAMERA_FACING_BACK);
if (!openCamera(id)) {
alertCameraDialog();
}
}
private void alertCameraDialog() {
AlertDialog.Builder dialog = createAlert(CustomCamaraActivity.this,
"Camera info", "error to open camera");
dialog.setNegativeButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
dialog.show();
}
private Builder createAlert(Context context, String title, String message) {
AlertDialog.Builder dialog = new AlertDialog.Builder(
new ContextThemeWrapper(context,
android.R.style.Theme_Holo_Light_Dialog));
dialog.setIcon(R.drawable.ic_launcher);
if (title != null)
dialog.setTitle(title);
else
dialog.setTitle("Information");
dialog.setMessage(message);
dialog.setCancelable(false);
return dialog;
}
private void flashOnButton() {
if (camera != null) {
try {
Parameters param = camera.getParameters();
if (flashmode) {
param.setFlashMode(Parameters.FLASH_MODE_OFF);
flashCameraButton.setBackground(getResources().getDrawable(R.drawable.ic_flash_off));
} else {
param.setFlashMode(Parameters.FLASH_MODE_TORCH);
flashCameraButton.setBackground(getResources().getDrawable(R.drawable.ic_flash_on));
}
//param.setFlashMode(!flashmode ? Parameters.FLASH_MODE_TORCH : Parameters.FLASH_MODE_OFF);
camera.setParameters(param);
flashmode = !flashmode;
} catch (Exception e) {
e.printStackTrace();
// TODO: handle exception
}
}
}
/**
* Metodo para cambiar el tamaño de la fotografia una resolucion predeterminada.
*
* #param image
* #param maxWidth
* #param maxHeight
* #return
*/
private Bitmap resize(Bitmap image, int maxWidth, int maxHeight) {
if (maxHeight > 0 && maxWidth > 0) {
int width = image.getWidth();
int height = image.getHeight();
float ratioBitmap = (float) width / (float) height;
float ratioMax = (float) maxWidth / (float) maxHeight;
int finalWidth = maxWidth;
int finalHeight = maxHeight;
if (ratioMax > 1) {
finalWidth = (int) ((float) maxHeight * ratioBitmap);
} else {
finalHeight = (int) ((float) maxWidth / ratioBitmap);
}
image = Bitmap.createScaledBitmap(image, finalWidth, finalHeight, true);
return image;
} else {
return image;
}
}
}
and here is the layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:id="#+id/surfaceView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:id="#+id/tvTextoCapturado"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textAlignment="center"
android:textColor="#color/white"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="10dp"
android:elevation="0dp"
android:orientation="horizontal"
android:weightSum="30">
<Button
android:id="#+id/flash"
android:layout_width="60dp"
android:layout_height="40dp"
android:layout_alignBaseline="#+id/captureImage"
android:layout_alignBottom="#+id/captureImage"
android:layout_marginLeft="27dp"
android:layout_marginRight="27dp"
android:layout_toLeftOf="#+id/captureImage"
android:layout_toStartOf="#+id/captureImage"
android:layout_weight="4"
android:background="#drawable/ic_flash_off"
android:gravity="center" />
<Button
android:id="#+id/captureImage"
android:layout_width="35dp"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginLeft="27dp"
android:layout_marginRight="27dp"
android:layout_weight="10"
android:background="#android:drawable/ic_menu_camera"
android:visibility="gone" />
<Button
android:id="#+id/btnCapturarFoto"
style="#style/blue_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="27dp"
android:layout_marginRight="27dp"
android:layout_weight="20"
android:elevation="0dp"
android:text="Tomar fotografia" />
<Button
android:id="#+id/flipCamera"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:layout_marginLeft="27dp"
android:layout_marginRight="27dp"
android:layout_toRightOf="#id/captureImage"
android:layout_weight="4"
android:background="#drawable/ic_rotate"
android:visibility="invisible" />
</LinearLayout>

You can achieve it by CameraSource class like this:
mCameraSource = builder
.setFlashMode(if (useFlash) Camera.Parameters.FLASH_MODE_TORCH else null)
.build()
Add below code to the button click listener:
mCameraSource.takePicture(null, CameraSource.PictureCallback { data ->
// here data is a byteArray, you can play with it :)
}

You have to add the XML object "SurfaceView" to your activity, not declare it as a variable :
In your main_activity.xml
<SurfaceView
android:id="#+id/cameraView"
android:layout_width="match_parent"
android:layout_height="300dp" />
In your activity.kt
val cameraView: SurfaceView = findViewById(R.id.cameraView)

How to Capture Screenshot of an Surface View

public class CustomCameraActivity extends Activity implements
SurfaceHolder.Callback {
Camera camera = null;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean previewing = false;
int flag = 0;
int which = 0;
Handler handler;
private boolean hasFlash;
private boolean isLighOn;
private Bitmap surfaceBitmap;
private Bitmap cameraBitmap;
private VerticalSeekBar greenSeekbar;
int vesion = 0;
public void turn() {
// myCamera is the Camera object
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.GINGERBREAD) {
// only for android older than gingerbread
if (Camera.getNumberOfCameras() >= 2) {
vesion = 1;
camera.stopPreview();
camera.release();
// "which" is just an integer flag
switch (which) {
case 0:
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);
which = 1;
break;
case 1:
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
which = 0;
break;
}
try {
camera.setPreviewDisplay(surfaceHolder);
// "this" is a SurfaceView which implements
// SurfaceHolder.Callback,
// as found in the code examples
camera.setPreviewCallback(null);
// camera.setPreviewCallback(this);
camera.startPreview();
} catch (IOException exception) {
camera.release();
camera = null;
}
vesion = 1;
} else {
AlertDialog.Builder ab = new AlertDialog.Builder(
CustomCameraActivity.this);
ab.setMessage("Device Having Only one Camera");
ab.setCancelable(false);
ab.setPositiveButton("ok",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
}
}).show();
}
} else {
AlertDialog.Builder ab1 = new AlertDialog.Builder(
CustomCameraActivity.this);
ab1.setMessage("This Device Does Not Support Dual Camera Feature");
ab1.setCancelable(false);
ab1.setPositiveButton("ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show();
}
}
private PictureCallback mPicture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Constants.data1 = data;
}
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView) findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(3);
this.surfaceView.setBackgroundColor(Color.argb(100, 0,
MotionEventCompat.ACTION_MASK, 0));
Button cap_btn = (Button) findViewById(R.id.button01);
Button retake = (Button) findViewById(R.id.retake);
Button use = (Button) findViewById(R.id.Use);
Button back = (Button) findViewById(R.id.back);
Button home = (Button) findViewById(R.id.home);
Button turn = (Button) findViewById(R.id.turn);
turn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
turn();
}
});
home.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
flash();
}
});
back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
use.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (flag >= 1) {
startActivity(new Intent(CustomCameraActivity.this,
Captured.class));
} else {
AlertDialog.Builder ab1 = new AlertDialog.Builder(
CustomCameraActivity.this);
ab1.setMessage("Please Capture Image");
ab1.setCancelable(false);
ab1.setPositiveButton("ok",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
}
}).show();
}
flag = 0;
}
});
retake.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
camera.startPreview();
flag = 0;
}
});
cap_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
camera.takePicture(null, null, mPicture);
flag++;
}
});
}
public void flash() {
this.hasFlash = getApplicationContext().getPackageManager()
.hasSystemFeature("android.hardware.camera.flash");
if (this.hasFlash) {
Parameters p = camera.getParameters();
if (this.isLighOn) {
p.setFlashMode("off");
camera.setParameters(p);
camera.stopPreview();
camera.startPreview();
this.isLighOn = false;
return;
}
p.setFlashMode("torch");
camera.setParameters(p);
camera.stopPreview();
camera.startPreview();
this.isLighOn = true;
return;
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
if (previewing) {
camera.stopPreview();
previewing = false;
}
if (camera != null) {
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e) {
e.printStackTrace();
}
}
}
void setCameraDisplayOrientation(Activity activity, int cameraId,
Camera camera) {
if (camera != null) {
int result;
CameraInfo info = new CameraInfo();
int degrees = 0;
switch (activity.getWindowManager().getDefaultDisplay()
.getRotation()) {
case 0:
degrees = 0;
break;
case 1:
degrees = 90;
break;
case 2:
degrees = 180;
break;
case 3:
degrees = 270;
break;
}
if (info.facing == 1) {
result = (360 - ((info.orientation + degrees) % 360)) % 360;
} else {
result = ((info.orientation - degrees) + 360) % 360;
}
camera.setDisplayOrientation(result);
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (vesion == 1) {
Camera.open(which);
} else {
camera = Camera.open();
}
} catch (Exception e) {
camera.release();
}
try {
Parameters parameters = camera.getParameters();
if (getResources().getConfiguration().orientation != 2) {
parameters.set("orientation", "portrait");
camera.setDisplayOrientation(90);
parameters.setRotation(90);
} else {
parameters.set("orientation", "landscape");
camera.setDisplayOrientation(0);
parameters.setRotation(0);
}
camera.setParameters(parameters);
camera.setPreviewDisplay(this.surfaceHolder);
} catch (IOException e2) {
camera.release();
}
camera.startPreview();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
public void joinBitmap() {
this.surfaceView.setBackgroundColor(-16711936);
this.surfaceView.setDrawingCacheEnabled(true);
this.surfaceView.buildDrawingCache();
this.surfaceView.refreshDrawableState();
new Thread() {
public void run() {
try {
CustomCameraActivity.this.surfaceBitmap = CustomCameraActivity.this.surfaceView
.getDrawingCache();
if (CustomCameraActivity.this.surfaceBitmap != null) {
File pictureFile = CustomCameraActivity
.getOutputMediaFile();
if (pictureFile != null) {
Bitmap finalbitmap = CustomCameraActivity.overlay(
CustomCameraActivity.this.cameraBitmap,
CustomCameraActivity.this.surfaceBitmap,
CustomCameraActivity.this.greenSeekbar
.getProgress() + 15);
if (pictureFile.exists()) {
pictureFile.delete();
}
try {
FileOutputStream out = new FileOutputStream(
pictureFile);
finalbitmap.compress(CompressFormat.JPEG, 90,
out);
out.flush();
out.close();
} catch (FileNotFoundException e) {
} catch (IOException e2) {
}
CustomCameraActivity.this.handler
.sendEmptyMessage(1);
return;
}
return;
}
CustomCameraActivity.this.handler.sendEmptyMessage(0);
} catch (Exception e3) {
}
}
}.start();
}
#SuppressLint({ "SimpleDateFormat" })
private static File getOutputMediaFile() {
File mediaStorageDir = new File(
Environment.getExternalStorageDirectory(),
"Night Vision Camera");
if (mediaStorageDir.exists() || mediaStorageDir.mkdirs()) {
return new File(
mediaStorageDir.getPath()
+ File.separator
+ "IMG_"
+ new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date()) + ".jpg");
}
return null;
}
public static Bitmap overlay(Bitmap bitmap1, Bitmap bitmapOverlay,
int opacity) {
Bitmap resultBitmap = Bitmap.createBitmap(bitmapOverlay.getWidth(),
bitmapOverlay.getHeight(), Config.ARGB_8888);
Canvas c = new Canvas(resultBitmap);
c.drawBitmap(bitmap1, 0.0f, 0.0f, null);
Paint p = new Paint();
p.setAlpha(opacity);
c.drawBitmap(bitmapOverlay, 0.0f, 0.0f, p);
return resultBitmap;
}
}
Here, I`m creating an image overlay on surface view and when i click on image to capture it, how to save it with that image that is overlayed on it? Please help and thanks in Advance. The image is captured but it is not saved with that image that is overlayed on the surface view.

You can use surfaceview.getDrawingCache();
this will return a Bitmap from your SurfaceView and then you can use it or save it in storage.

surfaceview.getDrawingCache(); does not work on surface, because surface is separate view than others view you have to get bitmpa on picturetaken method.
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
camera.startPreview();
Bitmap cameraBitmap = BitmapFactory.decodeByteArray
(data, 0, data.length);
Matrix matrix = new Matrix();
matrix.postRotate(90);
pd = new ProgressDialog(MainActivity.this);
pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pd.setTitle("Wait!");
pd.setMessage("capturing image.........");
pd.setIndeterminate(false);
pd.show();
progressStatus = 0;
new Thread(new Runnable() {
#Override
public void run() {
while (progressStatus < 100) {
// Update the progress status
progressStatus += 1;
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.post(new Runnable() {
#Override
public void run() {
// Update the progress status
pd.setProgress(progressStatus);
// If task execution completed
if (progressStatus == 100) {
// Dismiss/hide the progress dialog
pd.dismiss();
}
}
});
}
}
}).start();
Bitmap rotatedBitmap = Bitmap.createBitmap(cameraBitmap, 0, 0, cameraBitmap.getWidth(), cameraBitmap.getHeight(), matrix, true);
if (rotatedBitmap != null) {
rotatedBitmap = combinebitmap(rotatedBitmap, bitmapMap);
Random num = new Random();
int nu = num.nextInt(1000);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
rotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
byte[] bitmapdata = bos.toByteArray();
ByteArrayInputStream fis = new ByteArrayInputStream(bitmapdata);
String picId = String.valueOf(nu);
String myfile = "Ghost" + picId + ".jpeg";
File dir_image = new File(Environment.getExternalStorageDirectory() +//<---
File.separator + "LiveCamera"); //<---
dir_image.mkdirs(); //<---
try {
File tmpFile = new File(dir_image, myfile);
FileOutputStream fos = new FileOutputStream(tmpFile);
byte[] buf = new byte[1024];
int len;
while ((len = fis.read(buf)) > 0) {
fos.write(buf, 0, len);
}
fis.close();
fos.close();
Toast.makeText(getApplicationContext(),
" Image saved at :LiveCamera", Toast.LENGTH_LONG).show();
camera.startPreview();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
MediaScannerConnection.scanFile(MainActivity.this,
new String[]{dir_image.toString()}, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
}
});
safeToTakePicture = true;
}
}
};

android camera start activity after picture taken

I am creating small app which previews camera and when clicking on screen saves image.
My problem is when image is saved, I want to start different activity which will do preview and have some tools on it. But what ever I do activity doesn't start.
Here is my code
public class CameraActivity extends Activity {
private SurfaceView preview = null;
private SurfaceHolder previewHolder = null;
private Camera camera = null;
private boolean inPreview = false;
private boolean cameraConfigured = false;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
preview = (SurfaceView) findViewById(R.id.preview);
Button button = (Button) findViewById(R.id.button_capture);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (camera != null) {
camera.takePicture(null, null, photoCallback);
onPause();
Intent intent = new Intent(CameraActivity.this, PreviewAndSaveActivity.class);
intent.putExtra("image", "");
CameraActivity.this.startActivity(intent);
}
}
});
previewHolder = preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void onResume() {
super.onResume();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
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) {
camera = Camera.open(i);
}
}
}
if (camera == null) {
camera = Camera.open();
}
startPreview();
}
#Override
public void onPause() {
if (camera != null) {
if (inPreview) {
camera.stopPreview();
}
camera.release();
camera = null;
}
inPreview = false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height,
Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea) {
result = size;
}
}
}
}
return (result);
}
private Camera.Size getSmallestPictureSize(Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPictureSizes()) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea < resultArea) {
result = size;
}
}
}
return (result);
}
private void initPreview(int width, int height) {
if (camera != null && previewHolder.getSurface() != null) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(CameraActivity.this, t.getMessage(),
Toast.LENGTH_LONG).show();
}
if (!cameraConfigured) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = getBestPreviewSize(width, height, parameters);
Camera.Size pictureSize = getSmallestPictureSize(parameters);
if (size != null && pictureSize != null) {
parameters.setPreviewSize(size.width, size.height);
parameters.setPictureSize(pictureSize.width,
pictureSize.height);
parameters.setPictureFormat(ImageFormat.JPEG);
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
camera.setParameters(parameters);
cameraConfigured = true;
}
}
}
}
private void startPreview() {
if (cameraConfigured && camera != null) {
camera.startPreview();
inPreview = true;
}
}
SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
// no-op -- wait until surfaceChanged()
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
initPreview(width, height);
startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder) {
}
};
Camera.PictureCallback photoCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
camera.takePicture(null, null, new PhotoHandler(
getApplicationContext()));
camera.startPreview();
inPreview = true;
}
};
}
And in PhotoHandler after decoding and saving image I want to start activity
public class PhotoHandler implements PictureCallback {
private final Context context;
public PhotoHandler(Context context) {
this.context = context;
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFileDir = getDir();
if (!pictureFileDir.exists() && !pictureFileDir.mkdirs()) {
Log.d("", "Can't create directory to save image.");
Toast.makeText(context, "Can't create directory to save image.",
Toast.LENGTH_LONG).show();
return;
}
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmddhhmmss");
String date = dateFormat.format(new Date());
String photoFile = "pic_" + date + ".jpg";
String pictureName = pictureFileDir.getPath() + File.separator
+ photoFile;
File pictureFile = new File(pictureName);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(pictureFile);
fos.write(data);
Intent intent = new Intent(context, PreviewAndSaveActivity.class);
intent.putExtra("image", pictureName);
context.startActivity(intent);
} catch (Exception error) {
Toast.makeText(context, "Image could not be saved.",
Toast.LENGTH_LONG).show();
} finally {
if (fos != null) {
try {
fos.flush();
fos.close();
} catch (IOException e) {
}
}
}
}
private File getDir() {
File sdDir = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return new File(sdDir, "dir");
}
}
Any suggestion what am I doing wrong?

try this code :
(Replace your button click listener )
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (camera != null) {
camera.takePicture(null, null, photoCallback);
onPause();
Intent intent = new Intent(CameraActivity.this, PreviewAndSaveActivity.class);
intent.putExtra("image", "");
CameraActivity.this.startActivityForResult(intent, 100);
}
}
});
In your CameraActivity add this callback method to redirect on another activity after image save :
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 100) {
// start you new activity from here...
}
super.onActivityResult(requestCode, resultCode, data);
}

Custom camera android

I want to use camera preview in an activity. I want to add images(transparent frames on surface view). I tried following code so that i can easily customize the xml layout desirably:
package com.demo;
import java.io.IOException;
import android.app.Activity;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
public class CameraDemoActivity extends Activity implements SurfaceHolder.Callback{
/** Called when the activity is first created. */
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
camera = Camera.open();
if(camera!=null){
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (IOException e) {
Toast.makeText(this, (CharSequence) e, Toast.LENGTH_LONG).show();
}
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
Here is my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.demo"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".CameraDemoActivity"
android:label="#string/app_name" android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-feature android:name="android:hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
</manifest>
And here is my layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<SurfaceView
android:id="#+id/surfaceview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
Dont know why preview of camera is not displaying?

Use this code
PreviewDemo.java
public class PreviewDemo extends Activity implements OnClickListener {
private SurfaceView preview = null;
private SurfaceHolder previewHolder = null;
private Camera camera = null;
private boolean inPreview = false;
ImageView image;
Bitmap bmp, itembmp;
static Bitmap mutableBitmap;
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
File imageFileName = null;
File imageFileFolder = null;
private MediaScannerConnection msConn;
Display d;
int screenhgt, screenwdh;
ProgressDialog dialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.preview);
image = (ImageView) findViewById(R.id.image);
preview = (SurfaceView) findViewById(R.id.surface);
previewHolder = preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
previewHolder.setFixedSize(getWindow().getWindowManager()
.getDefaultDisplay().getWidth(), getWindow().getWindowManager()
.getDefaultDisplay().getHeight());
}
#Override
public void onResume() {
super.onResume();
camera = Camera.open();
}
#Override
public void onPause() {
if (inPreview) {
camera.stopPreview();
}
camera.release();
camera = null;
inPreview = false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height, Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size: parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea) {
result = size;
}
}
}
}
return (result);
}
SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(PreviewDemo.this, t.getMessage(), Toast.LENGTH_LONG)
.show();
}
}
public void surfaceChanged(SurfaceHolder holder,
int format, int width,
int height) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = getBestPreviewSize(width, height,
parameters);
if (size != null) {
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
inPreview = true;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// no-op
}
};
Camera.PictureCallback photoCallback = new Camera.PictureCallback() {
public void onPictureTaken(final byte[] data, final Camera camera) {
dialog = ProgressDialog.show(PreviewDemo.this, "", "Saving Photo");
new Thread() {
public void run() {
try {
Thread.sleep(1000);
} catch (Exception ex) {}
onPictureTake(data, camera);
}
}.start();
}
};
public void onPictureTake(byte[] data, Camera camera) {
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true);
savePhoto(mutableBitmap);
dialog.dismiss();
}
class SavePhotoTask extends AsyncTask < byte[], String, String > {#Override
protected String doInBackground(byte[]...jpeg) {
File photo = new File(Environment.getExternalStorageDirectory(), "photo.jpg");
if (photo.exists()) {
photo.delete();
}
try {
FileOutputStream fos = new FileOutputStream(photo.getPath());
fos.write(jpeg[0]);
fos.close();
} catch (java.io.IOException e) {
Log.e("PictureDemo", "Exception in photoCallback", e);
}
return (null);
}
}
public void savePhoto(Bitmap bmp) {
imageFileFolder = new File(Environment.getExternalStorageDirectory(), "Rotate");
imageFileFolder.mkdir();
FileOutputStream out = null;
Calendar c = Calendar.getInstance();
String date = fromInt(c.get(Calendar.MONTH)) + fromInt(c.get(Calendar.DAY_OF_MONTH)) + fromInt(c.get(Calendar.YEAR)) + fromInt(c.get(Calendar.HOUR_OF_DAY)) + fromInt(c.get(Calendar.MINUTE)) + fromInt(c.get(Calendar.SECOND));
imageFileName = new File(imageFileFolder, date.toString() + ".jpg");
try {
out = new FileOutputStream(imageFileName);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
scanPhoto(imageFileName.toString());
out = null;
} catch (Exception e) {
e.printStackTrace();
}
}
public String fromInt(int val) {
return String.valueOf(val);
}
public void scanPhoto(final String imageFileName) {
msConn = new MediaScannerConnection(PreviewDemo.this, new MediaScannerConnectionClient() {
public void onMediaScannerConnected() {
msConn.scanFile(imageFileName, null);
Log.i("msClient obj in Photo Utility", "connection established");
}
public void onScanCompleted(String path, Uri uri) {
msConn.disconnect();
Log.i("msClient obj in Photo Utility", "scan completed");
}
});
msConn.connect();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU && event.getRepeatCount() == 0) {
onBack();
}
return super.onKeyDown(keyCode, event);
}
public void onBack() {
Log.e("onBack :", "yes");
camera.takePicture(null, null, photoCallback);
inPreview = false;
}
#Override
public void onClick(View v) {
}
}
Preview.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<android.view.SurfaceView
android:id="#+id/surface"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</RelativeLayout>
Use device Menu button to take picture.
Add the permissions in Manifest file
Check Rotate folder in Gallery for the captured image.

custom camera in android

In my application I need to use custom camera. There are two buttons on the screen "Keep Image" and "Retake Photo". The picture taken by the cam should be saved in the specified directory when I click on the "keep image" button. When I click on "retake photo" button the cam should be ready to take a new photo. I have searched for the same and I got a Stack overflow link and I tried to implement that in my app, but the problem is all the code for taking picture and saving picture is written in the same class. The picture taken will be automatically saved without even a button click. I want to change that. I have tried different ways but throwing errors.
Please help me...given below is my java code
public class CustomCameraDemo extends Activity {
private SurfaceView preview=null;
private SurfaceHolder previewHolder=null;
public Camera camera=null;
private boolean inPreview=false;
//ImageView image;
Bitmap bmp,itembmp;
static Bitmap mutableBitmap;
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
File imageFileName = null;
File imageFileFolder = null;
private MediaScannerConnection msConn;
Display d; int screenhgt,screenwdh;
ProgressDialog dialog;
Button save;
Button retake;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// image=(ImageView)findViewById(R.id.image);
save=(Button)findViewById(R.id.Save);
retake=(Button)findViewById(R.id.Retake);
preview=(SurfaceView)findViewById(R.id.surface);
previewHolder=preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
previewHolder.setFixedSize(getWindow().getWindowManager()
.getDefaultDisplay().getWidth(), getWindow().getWindowManager()
.getDefaultDisplay().getHeight());
save.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
retake.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
#Override public void onResume() {
super.onResume();
camera=Camera.open();
}
#Override public void onPause() {
if (inPreview) {
camera.stopPreview(); }
camera.release();
camera=null;
inPreview=false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height,Camera.Parameters parameters){
Camera.Size result=null;
for (Camera.Size size : parameters.getSupportedPreviewSizes())
{
if (size.width<=width && size.height<=height)
{
if (result==null) {
result=size;
} else {
int resultArea=result.width*result.height;
int newArea=size.width*size.height;
if (newArea>resultArea) {
result=size;
}
}
}
}
return(result);
}
SurfaceHolder.Callback surfaceCallback=new SurfaceHolder.Callback(){
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(CustomCameraDemo.this, t.getMessage(), Toast.LENGTH_LONG).show();
}
}
public void surfaceChanged(SurfaceHolder holder,int format, int width,int height) {
Camera.Parameters parameters=camera.getParameters();
Camera.Size size=getBestPreviewSize(width, height,
parameters);
if (size!=null) {
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
inPreview=true;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
}
};
Camera.PictureCallback photoCallback=new Camera.PictureCallback(){
public void onPictureTaken(final byte[] data, final Camera camera){
dialog=ProgressDialog.show(CustomCameraDemo.this,"","Saving Photo");
new Thread(){
public void run(){
try{
Thread.sleep(1000);
}
catch(Exception ex){}
onPictureTake(data,camera);
}
}.start();
}
};
public void onPictureTake(byte[] data, Camera camera){
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true);
savePhoto(mutableBitmap);
dialog.dismiss();
}
class SavePhotoTask extends AsyncTask<byte[], String, String> {
#Override
protected String doInBackground(byte[]... jpeg) {
File photo=new File(Environment.getExternalStorageDirectory(),"photo.jpg");
if (photo.exists()){
photo.delete();
} try {
FileOutputStream fos=new FileOutputStream(photo.getPath());
fos.write(jpeg[0]);
fos.close();
} catch (java.io.IOException e) {
Log.e("PictureDemo", "Exception in photoCallback", e);
}
return(null);
}
}
public void savePhoto(Bitmap bmp) {
imageFileFolder = new File(Environment.getExternalStorageDirectory(),"MyMedicalRecords");
imageFileFolder.mkdir();
FileOutputStream out = null;
Calendar c = Calendar.getInstance();
String date = fromInt(c.get(Calendar.MONTH))+ fromInt(c.get(Calendar.DAY_OF_MONTH))
+ fromInt(c.get(Calendar.YEAR))
+ fromInt(c.get(Calendar.HOUR_OF_DAY))
+ fromInt(c.get(Calendar.MINUTE))
+ fromInt(c.get(Calendar.SECOND));
imageFileName = new File(imageFileFolder, date.toString() + ".jpg");
try { out = new FileOutputStream(imageFileName);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush(); out.close();
scanPhoto(imageFileName.toString());
out = null;
} catch (Exception e) { e.printStackTrace(); }
}
public String fromInt(int val) {
return String.valueOf(val);
}
public void scanPhoto(final String imageFileName) {
msConn = new MediaScannerConnection(CustomCameraDemo.this,new MediaScannerConnectionClient() {
public void onMediaScannerConnected() {
msConn.scanFile(imageFileName, null);
Log.i("msClient obj in Photo Utility","connection established");
}
public void onScanCompleted(String path, Uri uri) {
msConn.disconnect(); Log.i("msClient obj in Photo Utility","scan completed");
}
});
msConn.connect();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event){ if (
keyCode == KeyEvent.KEYCODE_MENU&& event.getRepeatCount() == 0)
{
onBack();
}
return super.onKeyDown(keyCode, event);
}
public void onBack(){ Log.e("onBack :","yes");
camera.takePicture(null,null,photoCallback);
inPreview=false;
}
}
given below is my main layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<android.view.SurfaceView
android:id="#+id/surface"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
<Button android:layout_width="150dip"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Keep Photo"
android:id="#+id/Save"></Button>
<TextView android:layout_below="#+id/surface"
android:layout_width="wrap_content"
android:id="#+id/textView1"
android:layout_height="wrap_content"
android:text=""
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"></TextView>
<Button android:layout_width="150dip"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#+id/textView1"
android:text="Retake Photo"
android:id="#+id/Retake"></Button> </RelativeLayout>

If you want to build over the existing code, you can just delete the saved image when the user opts to retake another image.

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