ImageWriter alternative for android 19-22?

ImageWriter alternative for android 19-22? - android

In version 23 of the android API there was the introduction of the class ImageWriter.
I need to use this class in an app that should run on api 19.
How can I re-implement the class? Is there some equivalent code (I have an Image instance I need to draw to a surface)?

Here you have a code which allows you to take a picture and preview it on a Surface. I'm sure you can adapt the code for your purpose.
Here's the XML code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="100dip"
android:layout_alignParentBottom="true"
android:gravity="center_vertical"
android:background="#A000">
<Button
android:layout_width="100dip"
android:layout_height="wrap_content"
android:text="Cancel"
android:onClick="onCancelClick"
/>
<Button
android:layout_width="100dip"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="Snap Photo"
android:onClick="onSnapClick"
/>
</RelativeLayout>
</RelativeLayout>
And here the Java code:
package app.test;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Toast;
public class PreviewActivity extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback {
Camera mCamera;
SurfaceView mPreview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mPreview = (SurfaceView)findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open();
}
#Override
public void onPause() {
super.onPause();
mCamera.stopPreview();
}
#Override
public void onDestroy() {
super.onDestroy();
mCamera.release();
Log.d("CAMERA","Destroy");
}
public void onCancelClick(View v) {
finish();
}
public void onSnapClick(View v) {
mCamera.takePicture(this, null, null, this);
}
#Override
public void onShutter() {
Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show();
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
//Here, we chose internal storage
try {
FileOutputStream out = openFileOutput("picture.jpg", Activity.MODE_PRIVATE);
out.write(data);
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
camera.startPreview();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters params = mCamera.getParameters();
List<Camera.Size> sizes = params.getSupportedPreviewSizes();
Camera.Size selected = sizes.get(0);
params.setPreviewSize(selected.width,selected.height);
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIEW","surfaceDestroyed");
}
}

Related

Android AutoFocus and Image preview size

I am using these two sources to make a QR code scanner
QR scanner android app
Fix the autofocus issue
I tried to fix the auto focus problem, but I am getting an error that says Cannot resolve symbol 'Field'
Also, I tried to work around the dimensions of the camera preview using the setRequestedPreviewSize method, but cannot find a solution.
MainActivity.java
import android.app.Activity;
import android.content.pm.PackageManager;
import android.graphics.ImageFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.util.SparseArray;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.TextView;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.vision.CameraSource;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.barcode.Barcode;
import com.google.android.gms.vision.barcode.BarcodeDetector;
import java.io.IOException;
import java.util.List;
public class MainActivity extends Activity {
private SurfaceView cameraView;
private TextView barcodeInfo;
private CameraSource cameraSource;
private SurfaceHolder surfaceHolder;
private GoogleApiClient client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cameraView = (SurfaceView) findViewById(R.id.cameraView);
barcodeInfo = (TextView) findViewById(R.id.infoTextView);
BarcodeDetector detector = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.QR_CODE).build();
cameraSource = new CameraSource.Builder(this, detector).setRequestedPreviewSize(640, 480).build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
cameraSource.start(cameraView.getHolder());
} catch (IOException e) {
Log.e("CAMERA SOURCE", e.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
detector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
barcodeInfo.post(new Runnable() {
#Override
public void run() {
barcodeInfo.setText(barcodes.valueAt(0).displayValue);
}
});
}
}
});
public void previewCamera() {
try {
cameraSource.setPreviewDisplay(surfaceHolder);
} catch (IOException e) {
e.printStackTrace();
}
CameraSource.Parameters param = cameraSource.getParameters();
List<CameraSource.Size> sizeList = cameraSource.getParameters().getSupportedPreviewSizes();
CameraSource.Size bestSize = sizeList.get(0);
for (int i = 1; i < sizeList.size(); i++) {
if ((sizeList.get(i).width * sizeList.get(i).height) > (bestSize.width * bestSize.height)) {
bestSize = sizeList.get(i);
}
}
List<Integer> supportedPreviewFormats = param.getSupportedPreviewFormats();
for (Integer previewFormat : supportedPreviewFormats) {
if (previewFormat == ImageFormat.YV12) {
param.setPreviewFormat(previewFormat);
}
}
PackageManager packageManager = getPackageManager();
if (packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA) && packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS)) {
param.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}
param.setPictureSize(bestSize.width, bestSize.height);
param.setPreviewSize(bestSize.width, bestSize.height);
cameraSource.setParameters(param);
cameraSource.startPreview();
previewing = true;
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.android.diverseycare.MainActivity"
android:background="#ffffff"
android:padding="16dp">
<SurfaceView
android:id="#+id/cameraView"
android:layout_width="640px"
android:layout_height="480px"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="67dp" />
<TextView
android:id="#+id/infoTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:text="Nothing to read"
android:textSize="20sp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
I tried to combine the code to using the code pointed out in the comments, but am I missing anything?Any pointers to a good resource to these issues are highly appreciated. (This is my first attempt at anbdroid, so please ingore if this is a silly mistake)

Try to use this utility : https://github.com/dlazaro66/QRCodeReaderView
....

Here's what I did
public void previewCamera() {
try {
camera.setPreviewDisplay(surfaceHolder);
} catch (IOException e) {
e.printStackTrace();
}
Camera.Parameters param = camera.getParameters();
List<Camera.Size> sizeList = camera.getParameters().getSupportedPreviewSizes();
Camera.Size bestSize = sizeList.get(0);
for (int i = 1; i < sizeList.size(); i++) {
if ((sizeList.get(i).width * sizeList.get(i).height) > (bestSize.width * bestSize.height)) {
bestSize = sizeList.get(i);
}
}
List<Integer> supportedPreviewFormats = param.getSupportedPreviewFormats();
for (Integer previewFormat : supportedPreviewFormats) {
if (previewFormat == ImageFormat.YV12) {
param.setPreviewFormat(previewFormat);
}
}
PackageManager packageManager = getPackageManager();
if (packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA) && packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS)) {
param.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}
param.setPictureSize(bestSize.width, bestSize.height);
param.setPreviewSize(bestSize.width, bestSize.height);
camera.setParameters(param);
camera.startPreview();
previewing = true;
}
Hope it helps!

Custom camera class in android

I create a CameraSurfaceView.java
And i added cameraSurfaceView in containerView.
Also, i input permission and feature.
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
But it doesn't work.
How do i fix this?
here is my sample code,
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".MainActivity">
<FrameLayout
android:id="#+id/cameraPreview"
android:layout_width="350dp"
android:layout_height="350dp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
MainActivity.java
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.widget.FrameLayout;
public class MainActivity extends Activity {
FrameLayout containerView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().setFormat(PixelFormat.UNKNOWN);
containerView= (FrameLayout)findViewById(R.id.camerapreview);
CameraSurfaceView cameraSurfaceView = new CameraSurfaceView(MainActivity.this);
containerView.addView(cameraSurfaceView);
}
}
CameraSurfaceView.java
import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
Camera camera = null;
SurfaceHolder surfaceHolder;
boolean previewing = false;
public CameraSurfaceView(Context context) {
super(context);
surfaceHolder = getHolder();
if (surfaceHolder != null) {
surfaceHolder.addCallback(this);
}
}
#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();
}
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
camera.setDisplayOrientation(90);
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
Thanks.

you need to pass camera object also in CameraSurfaceView
public CameraSurfaceView(Context context,Camera camera) {
super(context);
this.camera = camera;
surfaceHolder = getHolder();
if (surfaceHolder != null) {
surfaceHolder.addCallback(this);
}
}
In you main activty you need to open the camera //initialize,
private Camera mCamera;
CameraSurfaceView cameraSurfaceView = new CameraSurfaceView(MainActivity.this,mCamera);

Open camera in android using Camera Api

I have tried all the existing methods out there.. but everytime the application force closes. Here is the code. Please help me debugging it.
MainActivity.java
package com.example.camera1;
import android.os.Bundle;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
private Camera cameraObject;
private ShowCamera showCamera;
private ImageView pic;
public static Camera isCameraAvailiable(){
Camera object = null;
try { object = Camera.open();
} catch (Exception e){
} return object;
}
private PictureCallback capturedIt = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data , 0, data .length);
if(bitmap==null){
Toast.makeText(getApplicationContext(), "not taken", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(), "taken", Toast.LENGTH_SHORT).show();
}
cameraObject.release();
}
};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pic = (ImageView)findViewById(R.id.imageView1);
cameraObject = isCameraAvailiable();
showCamera = new ShowCamera(this, cameraObject);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(showCamera);
}
public void snapIt(View view){
cameraObject.takePicture(null, null, capturedIt);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
ShowCamera.java
package com.example.camera1;
import java.io.IOException;
import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder holdMe;
private Camera theCamera;
public ShowCamera(Context context,Camera camera) {
super(context);
theCamera = camera;
holdMe = getHolder();
holdMe.addCallback(this);
// TODO Auto-generated constructor stub
}
#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
try {
theCamera.setPreviewDisplay(holder);
theCamera.startPreview();
} catch (IOException e)
{
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#+id/camera_preview"
android:layout_width="fill_parent"
android:layout_height="199dp" >
</FrameLayout>
<Button
android:id="#+id/button_capture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick = "snapIt"
android:text="#string/Capture"/>
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="fitXY"
android:src="#drawable/ic_launcher"/>
</LinearLayout>
I am making this for android gingerbread and above versions. where my target sdk is Android Kitkat.
While testing the app on gingerbread it opens the application but simply shows a white screen that is it doesnt load the layout and force closes.. please help..!!

To open the camera,use the following code appropriately:
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_FRONT) {
camera=Camera.open(i);
}
}
}
if (camera == null) {
camera=Camera.open();
}
Add the SurfaceView to a FrameLayout in order to display it.
Instead of returning the Camera,you could instead use the global Camera instance variable.The camera is released in onPause like this:
mCamera.release();
mCamera=null;
//remove SurfaceView from the FrameLayout you added it to
You can retain the Camera.Parameters object and use it to set the parameters to the value by placing a check in your surfaceChanged.
You could also consider starting your Camera in a seperate Thread in onCreate as it has been done here:
//This code is from AOSP ICS:
Thread mCameraOpenThread = new Thread(new Runnable() {
public void run() {
try {
mCameraDevice = Util.openCamera(Camera.this, mCameraId);
} catch (CameraHardwareException e) {
mOpenCameraFail = true;
} catch (CameraDisabledException e) {
mCameraDisabled = true;
}
}
});
This is the onCreate method:
super.onCreate(icicle);
mCameraOpenThread.start();
SurfaceView preview = (SurfaceView) findViewById(R.id.camera_preview);
SurfaceHolder holder = preview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// Make sure camera device is opened.
try {
mCameraOpenThread.join();
mCameraOpenThread = null;
}
catch(InterruptedException e)
{
//ignore
}
The link to the code is here http://android.googlesource.com/platform/packages/apps/Camera/+/ics-factoryrom-2-release/src/com/android/camera/Camera.java

unresolved 'main' and 'mPreview' in Android camera example at java2s.com

I'm trying to work a camera preview example at
http://www.java2s.com/Code/Android/Hardware/Camerapreview.htm
I copied the following code
import java.util.List;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class PreviewActivity extends Activity implements SurfaceHolder.Callback {
Camera mCamera;
SurfaceView mPreview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mPreview = (SurfaceView)findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open();
}
#Override
public void onPause() {
super.onPause();
mCamera.stopPreview();
}
#Override
public void onDestroy() {
super.onDestroy();
mCamera.release();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters params = mCamera.getParameters();
List<Camera.Size> sizes = params.getSupportedPreviewSizes();
Camera.Size selected = sizes.get(0);
params.setPreviewSize(selected.width,selected.height);
mCamera.setParameters(params);
mCamera.startPreview();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIEW","surfaceDestroyed");
}
and also at layout activity_man.xml
the following code:
<?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">
<SurfaceView
android:id="#+id/preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</RelativeLayout>
I get errors at the following lines:
setContentView(R.layout.main);
Preview = (SurfaceView)findViewById(R.id.preview);
main and preview cannot be resolved
How can I correct this:
thanks
Dave

If name of the layout file is activity_man.xml, then you should call it right.
setContentView(R.layout.activity_man);

How to switch from front and back cameras on a button click?

i want to switch between the front and back cameras on a button click .
when any one of the camera's is open , i need to release it and open the other one .
could anyone tell me the block of code to switch ?
Thank you in advance . . . .
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="#drawable/camera_btn"/>
<Button
android:id="#+id/Button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/front_back_btn"/>
<ImageView
android:id="#+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/Button01"
android:contentDescription="#string/app_name">
</ImageView>
<com.example.surfacecamera.CameraView
android:id="#+id/CameraView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" />
</RelativeLayout>
THIS IS MY ACTIVITY
and main java class is
package com.example.surfacecamera;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.hardware.Camera;
public class MainActivity extends Activity implements OnClickListener, Camera.PictureCallback {
CameraView cameraView;
ImageView imv;
Button b2 ;
int cameraCount = 0;
int camIdx = 0;
Camera cam;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_main);
Button pictureButton = (Button) this.findViewById(R.id.Button01);
Button b2 = (Button) this.findViewById(R.id.Button02);
imv = (ImageView) this.findViewById(R.id.ImageView01);
cameraView = (CameraView) this.findViewById(R.id.CameraView01);
cameraCount = Camera.getNumberOfCameras();
b2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
}
});
pictureButton.setOnClickListener(this);
}
// From the OnClickListener
public void onClick(View v)
{
cameraView.takePicture(null, null, this);
}
// From the Camera.PictureCallback
public void onPictureTaken(byte[] data, Camera camera)
{
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
imv.setImageBitmap(bmp);
String filename = "apicture.jpg";
File pictureFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + filename);
try
{
FileOutputStream pfos = new FileOutputStream(pictureFile);
bmp.compress(CompressFormat.JPEG, 75, pfos);
pfos.flush();
pfos.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
and another class
package com.example.surfacecamera;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.content.Context;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class CameraView extends SurfaceView implements SurfaceHolder.Callback
{
SurfaceHolder mHolder;
int width;
int height;
Camera mCamera;
public CameraView(Context context, AttributeSet attrs)
{
super(context,attrs);
holderCreation();
}
public CameraView(Context context)
{
super(context);
holderCreation();
}
public void takePicture(Camera.ShutterCallback shutter, Camera.PictureCallback raw, Camera.PictureCallback jpeg)
{
mCamera.takePicture(shutter, raw, jpeg);
}
#SuppressWarnings("deprecation")
public void holderCreation()
{
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder)
{
// The Surface has been created, acquire the camera and tell it where to draw.
mCamera = Camera.open();
Parameters params = mCamera.getParameters();
// If we aren't landscape (the default), tell the camera we want portrait mode
if (this.getResources().getConfiguration().orientation !=
Configuration.ORIENTATION_LANDSCAPE)
{
params.set("orientation", "portrait"); // "landscape"
// And Rotate the final picture if possible
// This works on 2.0 and higher only
//params.setRotation(90);
// Use reflection to see if it exists and to call it so you can support older versions
try {
Method rotateSet = Camera.Parameters.class.getMethod(
"setRotation", new Class[] { Integer.TYPE } );
Object arguments[] = new Object[] { new Integer(90) };
rotateSet.invoke(params, arguments);
} catch (NoSuchMethodException nsme) {
// Older Device
Log.v("CameraView","No Set Rotation");
} catch (IllegalArgumentException e) {
Log.v("CameraView","Exception IllegalArgument");
} catch (IllegalAccessException e) {
Log.v("CameraView","Illegal Access Exception");
} catch (InvocationTargetException e) {
Log.v("CameraView","Invocation Target Exception");
}
}
mCamera.setParameters(params);
try
{
mCamera.setPreviewDisplay(holder);
}
catch (IOException exception)
{
mCamera.release();
mCamera = null;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
// Because the CameraDevice object is not a shared resource, it's very
// important to release it when the activity is paused.
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h)
{
width = w;
height = h;
// Now that the size is known, set up the camera parameters and begin the preview.
Camera.Parameters parameters = mCamera.getParameters();
//parameters.setPreviewSize(w, h);
mCamera.setParameters(parameters);
mCamera.startPreview();
}
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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