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| package univ.rouen.spirit.activity;
import java.io.IOException;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import univ.rouen.spirit.activity.R;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore.Images.ImageColumns;
import android.provider.MediaStore.Images.Media;
import android.provider.MediaStore.MediaColumns;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
/**
* The home user interface of the spirit application
* that displays a camera, if we want to take a picture
* from the spirit application and allows to browse a
* picture from the smartphone memory.
*
* @author Spirit Red Team
*
*/
public class CameraActivity extends Activity implements SurfaceHolder.Callback {
// FIELDS
/**
* The camera object that spirit application uses
* to take a picture.
*/
private Camera camera;
/**
* Indicates if or not the photo
* preview is running. The default
* value is false.
*/
private boolean isPreviewRunning = false;
/**
* A date format to include in the picture name.
*/
private SimpleDateFormat timeStampFormat = new SimpleDateFormat("yyyy-MM-dd-HH.mm.ss");
/**
* The surfaceView field defines the camera area
* in the smartphone interface.
*/
private SurfaceView surfaceView;
/**
* Allows you to control the SurfaceView settings
* and to monitor changes on it. That's why the
* CameraActivity class implements SurfaceHolder.CallBack
* interface in order to be notified about changes in the
* SurfaceView calling the <em>SurfaceHolder.CallBack</em>
* methods: surfaceChanged, surfaceCreated and surfaceDestroyed.
*/
private SurfaceHolder surfaceHolder;
/**
* The handler that held a auto focus
* request on the camera. This field is
* initialized by the requestAutoFocus method
* and read in the onAutoFocus method of the
* autoFocusCallBack field.
*/
private Handler mAutoFocusHandler;
/**
* Message sent by mAutoFocusHandler.
*/
private int mAutoFocusMessage;
/**
* Uri that identifies the file where
* picture is going to be saved.
*/
private Uri taken;
/**
* The OutputStream to the picture taken file.
*/
private OutputStream fileoutputStream;
//the bundle used to transmit data to the following activities, like the picture's path
private Bundle b;
private String imgPath;
/**
* The take picture button listener.
*/
private OnClickListener btListener = new OnClickListener() {
public void onClick(View v) {
takeThePicture();
}
};
/**
* The image browser listener.
*/
private OnClickListener imageBrowserListener = new OnClickListener() {
public void onClick(View v) {
b=new Bundle();
b.putString("FILE",imgPath);
Intent intent1 = new Intent(CameraActivity.this, ImageBrowserActivity.class);
intent1.putExtras(b);
startActivity(intent1);
}
};
/**
* The callback called when focus
* is requested.
*/
private final Camera.AutoFocusCallback autoFocusCallback = new Camera.AutoFocusCallback() {
public void onAutoFocus(boolean success, Camera camera) {
if (mAutoFocusHandler != null) {
Message message = mAutoFocusHandler.obtainMessage(mAutoFocusMessage, success);
mAutoFocusHandler.sendMessageDelayed(message, 1500);
mAutoFocusHandler = null;
}
}
};
/**
* The callback called after the image
* is captured. It can be used to annotate
* the picture with the GPS coords.
*/
Camera.ShutterCallback mShutterCallback = new Camera.ShutterCallback() {
public void onShutter() {
Log.e(getClass().getSimpleName(), "SHUTTER CALLBACK");
// TODO
}
};
/**
* The callback called by the
* android.hardware.takePicture method when
* the byte data of the taken image is available.
* In this case it starts the picture preview.
*/
Camera.PictureCallback mPictureCallbackRaw = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
Log.e(getClass().getSimpleName(), "PICTURE CALLBACK RAW: " + data);
camera.startPreview();
}
};
/**
* The callback called when the
* compressed image (JPEG) is available.
* In this case it saves the picture into
* the smartphone memory.
*/
Camera.PictureCallback mPictureCallbackJpeg = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
try {
Log.v(getClass().getSimpleName(), "onPictureTaken=" + data + " length = " + data.length);
fileoutputStream.write(data);
fileoutputStream.flush();
fileoutputStream.close();
Intent intent1 = new Intent(CameraActivity.this, CityNameActivity.class);
intent1.putExtra("univ.rouen.spirit.imageUri", taken.getPath());
startActivity(intent1);
} catch(Exception ex) {
//TODO
}
}
};
// EVENTS HANDLER METHODS
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Log.e(getClass().getSimpleName(), "onCreate");
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.camera_activity);
ImageButton b1 = (ImageButton) this.findViewById(R.id.takepicture);
b1.setOnClickListener(btListener);
surfaceView = (SurfaceView)findViewById(R.id.surface);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
ImageButton browse = (ImageButton) findViewById(R.id.browse);
browse.setOnClickListener(imageBrowserListener);
}
@Override
/**
* Switches from the CameraActivity to
* the LanguageChooserActivity
*/
public boolean onCreateOptionsMenu(Menu menu) {
Intent settingsActivity = new Intent(this, LanguageChooserActivity.class);
startActivity(settingsActivity);
return false;
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
/**
* Takes a picture pressing the center
* digital pad of the smartphone.
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
takeThePicture ();
return true;
}
if (keyCode == KeyEvent.KEYCODE_BACK) {
return super.onKeyDown(keyCode, event);
}
return false;
}
@Override
protected void onResume() {
Log.e(getClass().getSimpleName(), "onResume");
super.onResume();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onStop() {
Log.e(getClass().getSimpleName(), "onStop");
super.onStop();
}
// TOOLS
/**
* Takes the picture and calls every callback
* saved in the camera object
*/
private void takeThePicture() {
try {
String filename = "spirit" + timeStampFormat.format(new Date());
imgPath = filename + ".jpg";
ContentValues values = new ContentValues();
values.put(Media.TITLE, imgPath);
values.put(Media.DISPLAY_NAME, imgPath);
values.put(Media.DESCRIPTION, "Image capture by camera for Spirit Application");
long dt = new Date().getTime();
values.put(ImageColumns.DATE_TAKEN, dt);
values.put(MediaColumns.MIME_TYPE, "image/jpeg");
taken = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, values);
fileoutputStream = getContentResolver().openOutputStream(taken);
camera.takePicture(mShutterCallback, mPictureCallbackRaw, mPictureCallbackJpeg);
} catch(Exception ex ) {
ex.printStackTrace();
Log.e(getClass().getSimpleName(), ex.getMessage(), ex);
}
}
/**
* Request a focus
*
* @param handler the handler used to send the message
* @param message the message to be sent
*/
public void requestAutoFocus(Handler handler, int message) {
if (camera != null) {
mAutoFocusHandler = handler;
mAutoFocusMessage = message;
camera.autoFocus(autoFocusCallback);
}
}
/**
* Called when the SurfaceView is created.
* In this case it opens the camera.
*/
public void surfaceCreated(SurfaceHolder holder) {
Log.e(getClass().getSimpleName(), "surfaceCreated");
camera = Camera.open();
}
/**
* Called when the SurfaceView changes.
*/
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(getClass().getSimpleName(), "surfaceChanged");
if (isPreviewRunning) {
camera.stopPreview();
}
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(w, h);
camera.setParameters(p);
try {
camera.setPreviewDisplay(holder);
} catch (IOException e) {
}
camera.startPreview();
isPreviewRunning = true;
}
/**
* Called when the surface is destroyed
*/
public void surfaceDestroyed(SurfaceHolder holder) {
Log.e(getClass().getSimpleName(), "surfaceDestroyed");
camera.stopPreview();
isPreviewRunning = false;
camera.release();
}
} |
