Using setPictureSize and Camera Parameters

I've looked into figuring out how to set the size of a picture, and I stumbled upon CameraParameters and the setPictureSize method associated with it. The problem is, I can't figure out how to use any of these. I don't know what needs to be imported, what object to create, how to use the setPictureSize method, or where to even place that cod开发者_如何学JAVAe. I have 2 chunks of code that I feel may be a good place to use setPictureSize. These chunks are:

    takePicture = (Button) findViewById(R.id.takePicture);

    takePicture.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            if (name.getText().length() == 0 || experimentInput.getText().length() == 0) {
                showDialog(DIALOG_REJECT);
                return;
            }

            ContentValues values = new ContentValues();
            imageUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
            intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);

            time = getTime() ;

            startActivityForResult(intent, CAMERA_PIC_REQUESTED);
        }

    });

and:

public static File convertImageUriToFile (Uri imageUri, Activity activity)  {
    if (activity == null) Log.d("test", "NULL!");
    Cursor cursor = null;
    try {

        String [] proj={MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID, MediaStore.Images.ImageColumns.ORIENTATION};
        cursor = activity.managedQuery( imageUri,
                proj, // Which columns to return
                null,       // WHERE clause; which rows to return (all rows)
                null,       // WHERE clause selection arguments (none)
                null); // Order-by clause (ascending by name)
        int file_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        int orientation_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.ORIENTATION);
        if (cursor.moveToFirst()) {
            @SuppressWarnings("unused")
                String orientation =  cursor.getString(orientation_ColumnIndex);
            return new File(cursor.getString(file_ColumnIndex));
        }
        return null;
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    if(cursor!=null)
    {
        //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
        //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
    else return null;
}

So, my question is, how do I use setPictureSize and where should I put it? No website, nor the android development guide, nor any other related StackOverflow question was helpful to me.

Editted Code:

public Bitmap getPath(Uri uri) {
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        if(cursor!=null)
        {
            //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
            //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();

            int desiredImageWidth = 100;  // pixels
            int desiredImageHeight = 100; // pixels
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inSampleSize = 2; // will cut the size of the image in half; OPTIONAL
            Bitmap newImage = Bitmap.createScaledBitmap(BitmapFactory.decodeFile(cursor.getString(column_index), o), 
                                                       desiredImageWidth, 
                                                       desiredImageHeight, 
                                                       false);

            return newImage; //cursor.getString(column_index);
        }
        else return null;
    }

That's used for when you're actually using the camera through a custom View. What you're doing right here is sending an implicit intent to Android to open another Activity that uses the camera to take a picture.

In this case, you can limit the size of your image by using MediaStore.EXTRA_SIZE_LIMIT. If you want to specify the dimensions of the image, than you have to load it from the URI that it was saved to, create a new scaled image, then resave it over the old one.

Once you have the URI of the image (which is from the DATA attribute in the projection), you can resize the image like so:

int desiredImageWidth = 100;  // pixels
int desiredImageHeight = 100; // pixels
BitmapFactory.Options o = new BitmapFactory.Options();
o.inSampleSize = 2; // will cut the size of the image in half; OPTIONAL
Bitmap newImage = Bitmap.createScaleBitmap(BitmapFactory.decodeFile(imagePath, o), 
                                           desiredImageWidth, 
                                           desiredImageHeight, 
                                           false);

Then save it over the old one.