Android/Camera

Taking photos from the handset's camera via Intents

Taking a photo via the camera is actually a really easy task in Android if using Intents. I provide a little code snippet which illustrates its usage.

Fire up an intent to start the 'photo-taking' activity:

mTakePhoto = (ImageButton)findViewById(R.id.takePhoto);
mTakePhoto.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // fire off an intent for the camera
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, REQUEST_CAMERA);
    }
});

비디오 파일을 특정 경로에 저장

videoCaptureIntent.putExtra (MediaStore.EXTRA_OUTPUT, Uri.fromFile(video));

This will launch the 'photo-taking' activity which lets you take a picture. To get (and handle) the result you will need a listener to respond when the image capture is finished:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    super.onActivityResult(requestCode, resultCode, data);
 
    // if Activity was canceled, display a Toast message for 1 second
    if (resultCode == RESULT_CANCELED) {
        Toast toast = Toast.makeText(this,"Activity cancelled", 1000);
        toast.show();
        return;
    }
 
    // lets check if we are really dealing with a picture
    if (requestCode == REQUEST_CAMERA && resultCode == RESULT_OK) {
        String timestamp = Long.toString(System.currentTimeMillis());
        // get the picture
        mPicture = (Bitmap) data.getExtras().get("data");
 
        // save image to gallery
        MediaStore.Images.Media.insertImage(getContentResolver(), mPicture, timestamp, timestamp);
 
        Uri uri=MediaStore.Images.Thumbnails.getContentUri("external");
 
        Cursor cursor=MediaStore.Images.Thumbnails.queryMiniThumbnails(getContentResolver(),
                      uri, MediaStore.Images.Thumbnails.MICRO_KIND, null);
 
        Long _imageId = null;
        cursor.moveToFirst();
        while(true) {
            for(int  i= 0; i < cursor.getColumnCount() ;i++) {
                if(cursor.getColumnName(i).equals("image_id")) {
                    _imageId = Long.parseLong(cursor.getString(i));
                }
            }
            if(cursor.isLast()) {
                break;
            } else {
                cursor.moveToNext();
            }
        }
        // Get Bitmap and scale to default icon size
        Bitmap tmp = MediaStore.Images.Thumbnails.getThumbnail(getContentResolver(),
                     _imageId, MediaStore.Images.Thumbnails.MICRO_KIND, null);
        tmp = Bitmap.createScaledBitmap(tmp, 48, 48, true);
        // Update ImageButton icon
        mTakePhoto.setImageBitmap(tmp);
 
        // save image to SD card
        try {
            File directory = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/SOME_DIR/");
            if(!directory.exists()) directory.mkdir();
            FileOutputStream fos = new FileOutputStream(directory+"/"+timestamp+".jpg");
            Environment.getExternalStorageDirectory().mkdir();
            mPicture.compress(Bitmap.CompressFormat.JPEG, 90, fos);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

The listener responds when an photo was taken and lets you access the data. What I am doing with the data is this: add it to the device's media gallery create a bitmap thumbnail to update to button's icon with the just taken picture additionally store the image on the sd-card on an arbitrary location Obviously, this is quite a lot of code. If you just want to add the picture to the media gallery, code reduces to just 2 lines (after the checks) for the listener:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
 
    // if Activity was canceled, display a Toast message for 1 second 
    if (resultCode == RESULT_CANCELED) {
        Toast toast = Toast.makeText(this,"Activity cancelled", 1000);
        toast.show();
        return;
    }
 
    // lets check if we are really dealing with a picture 
    if (requestCode == REQUEST_CAMERA && resultCode == RESULT_OK) {
        // get the picture
        mPicture = (Bitmap) data.getExtras().get("data");
 
        // save image to gallery
        MediaStore.Images.Media.insertImage(getContentResolver(), mPicture, timestamp, timestamp);
    }
}