Android Open Source - Apps101CourseraCameraSample Picture Saver

• Back to Camera/app  ↑

From Project

Back to project page Apps101CourseraCameraSample.

License

The source code is released under:

MIT License

Java Source Code

/**
 * @author Vishnu Indukuri/* w  w w .j ava 2 s . c  o m*/
 * @since 12/18/2013
 * @version 0.01
 * Licensed under the MIT License 
 */
package indukuri.apps101.cameradrawsample;

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

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

/**
 * A utility class that manages saving the image
 * and loading it into a Canvas for drawing.
 */
public class PictureSaver {
  private static final String TAG = "CameraDrawingSample";
  private static final String STORAGE_PROBLEM = "Sorry.  Problem saving picture.";
  private static final String SDCARD_PROBLEM = "Sorry.  SD Card unmounted.";
  private static final int MEDIA_TYPE_IMAGE = 1;
  private Context mContext;
  
  
  public PictureSaver(Context context){
    mContext = context;
  }
  public PictureCallback getSaver(){
    return mPicture;
  }
  
  private PictureCallback mPicture = new PictureCallback() {
      @Override
      public void onPictureTaken(byte[] data, Camera camera) {
        // Get a file somewhere on SD Card where we can share 
        // our picture with other apps
          File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
          if (pictureFile == null){
              Log.d(TAG, "Error creating media file, check storage permissions: ");
              return;
          }

          // write the picture data to the file
          try {
              FileOutputStream fos = new FileOutputStream(pictureFile);
              fos.write(data);
              fos.close();
          } catch (FileNotFoundException e) {
              Log.d(TAG, "File not found: " + e.getMessage());
          } catch (IOException e) {
              Log.d(TAG, "Error accessing file: " + e.getMessage());
          }
          
          // Share our picture with the device gallery 
          Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
          Uri contentUri = Uri.fromFile(pictureFile);
          mediaScanIntent.setData(contentUri);
          mContext.sendBroadcast(mediaScanIntent);
          
          // Send the picture to the DrawActivity
          Intent intent = new Intent(mContext, DrawActivity.class);
          intent.putExtra("pictureFileName", pictureFile.getAbsolutePath());
          intent.putExtra("picture", data);
          mContext.startActivity(intent);
      }
  };
  
  /** Create a File for saving an image or video */
  @SuppressLint("SimpleDateFormat")
  private File getOutputMediaFile(int type){
      // To be safe, you should check that the SDCard is mounted
      // using Environment.getExternalStorageState() before doing this.
    if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
      Toast.makeText(mContext, SDCARD_PROBLEM, Toast.LENGTH_LONG);
      return null;
    }

    // This location works best if you want the created images to be shared
      // between applications and persist after your app has been uninstalled.
      File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES), "DrawCameraSample");

      // Create the storage directory if it does not exist
      if (! mediaStorageDir.exists()){
          if (! mediaStorageDir.mkdirs()){
            Toast.makeText(mContext, STORAGE_PROBLEM , Toast.LENGTH_LONG).show();
              return null;
          }
      }

      // Create a media file name
      String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
      return new File(mediaStorageDir.getPath() + File.separator + "IMG_"+ timeStamp + ".jpg");
  }

}

Java Source Code List

• Back to Camera/app  ↑