// 注销广播
unregisterReceiver(alarmReceiver);
}

BroadcastReceiver alarmReceiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
if ("com.vegetables_source.alarm".equals(intent.getAction())) {

if (camera != null) {
SurfaceView dummy = new SurfaceView(getBaseContext());
try {
camera.setPreviewDisplay(dummy.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
camera.startPreview();

camera.takePicture(null, null, new PhotoHandler(
getApplicationContext()));
}

}

}
};

private Camera openFacingBackCamera() {
Camera cam = null;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
;
for (int camIdx = 0, cameraCount = Camera.getNumberOfCameras(); camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
e.printStackTrace();
}
}
}

return cam;
}
}

进行拍照存储的操作代码如下：

package com.yang.handle;

import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Environment;
import android.widget.Toast;

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()) {

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 = "Picture_" + date + ".jpg";

String filename = pictureFileDir.getPath() + File.separator + photoFile;

File pictureFile = new File(filename);
System.out.println("filename is "+ filename);

try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
Toast.makeText(context, "New Image saved:" + photoFile,
Toast.LENGTH_LONG).show();
} catch (Exception error) {
Toast.makeText(context, "Image could not be saved.",
Toast.LENGTH_LONG).show();
}
}

private File getDir() {
File sdDir = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return new File(sdDir, "ServiceCamera");
}
}

项目代码如下：

具体下载目录在 /2013年资料/7月/7日/Android后台开启服务默默拍照

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