调整从图库中选取的图像

Question

I'm working in an app that take an image from the gallery and save it into parse.

The problem is that when I pick an image taken by the camera the size of the image is too big and takes some seconds to load the image in an image view. Also when I save the image and download again in the app it takes a lot of time because it has to download a big image.

I don't know how I reduce the size of the image picked. I tried several things but anything works.

This is my code at this moment

public class Datos extends Activity implements OnItemSelectedListener {


private final int SELECT_PHOTO = 1;
private ImageButton imageView;


ParseFile file;
byte [] data;

/*
    public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
    int width = bm.getWidth();
    int height = bm.getHeight();
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;
    // CREATE A MATRIX FOR THE MANIPULATION
    Matrix matrix = new Matrix();
    // RESIZE THE BIT MAP
    matrix.postScale(scaleWidth, scaleHeight);

    // "RECREATE" THE NEW BITMAP
    Bitmap resizedBitmap = Bitmap.createBitmap(
            bm, 0, 0, width, height, matrix, false);
    bm.recycle();
    return resizedBitmap;
    }
*/


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_datos);
    btnClick();

    imageView = (ImageButton) findViewById(R.id.imageButton);


    ImageButton pickImage = (ImageButton) findViewById(R.id.imageButton);
    pickImage.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            //photoPickerIntent.putExtra("outputX", 150);
            //photoPickerIntent.putExtra("outputY", 100);
            //photoPickerIntent.putExtra("aspectX", 1);
            //photoPickerIntent.putExtra("aspectY", 1);
            //photoPickerIntent.putExtra("scale", true);
            startActivityForResult(photoPickerIntent, SELECT_PHOTO);
        }
    });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);


    switch (requestCode) {
        case SELECT_PHOTO:
            if (resultCode == RESULT_OK) {
                try {
                    Uri imageUri = imageReturnedIntent.getData();
                    InputStream imageStream = getContentResolver().openInputStream(imageUri);
                    Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
                    imageView.setImageBitmap(selectedImage);

                    ByteArrayOutputStream stream = new ByteArrayOutputStream();
                    selectedImage.compress(Bitmap.CompressFormat.PNG, 100, stream);

                    data = stream.toByteArray();

                    BitmapDrawable bitmapDrawable = new BitmapDrawable(getResources(), selectedImage);
                    imageView.setBackgroundDrawable(bitmapDrawable);

                    BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
                    Bitmap bmp = drawable.getBitmap();
                    Bitmap b = Bitmap.createScaledBitmap(bmp, 120, 120, false);


                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }


            }

    }
}



@Override
public void onItemSelected(AdapterView<?> parent, View v, int position,
                           long id) {
    // TODO Auto-generated method stub

    Spinner spinner = (Spinner) parent;
    if (spinner.getId() == R.id.telefono) {
        consola = parent.getItemAtPosition(position).toString();
    } else if (spinner.getId() == R.id.provincia) {
        provincia = parent.getItemAtPosition(position).toString();
    }

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub
}


public void btnClick() {

    Button buttonEnviar = (Button) findViewById(R.id.enviar);


    buttonEnviar.setOnClickListener(new OnClickListener() {


        @Override
        public void onClick(View arg0) {

            //Storing image in parse passed in  onclick method of a button with the below code:


            Intent intentDatos = new Intent(Datos.this, Inicio.class);
            startActivity(intentDatos);


            ParseObject testObject = new ParseObject("Musica");

            if (data != null) {

                file = new ParseFile("selected.png", data);
            }

            else {

                data = "".getBytes();
                file = new ParseFile("selected.png", data);
            }

            //file.saveInBackground();


            testObject.put("imagen", file);

            testObject.saveInBackground();




        }
    });


}

Does Anyone know how to do it?

Thanks for your help,

Answer 1

This answer will help you

if you want bitmap ratio same and reduce bitmap size. then pass your maximum size bitmap. you can use this function

 public Bitmap getResizedBitmap(Bitmap image, int maxSize) { int width = image.getWidth(); int height = image.getHeight(); float bitmapRatio = (float)width / (float) height; if (bitmapRatio > 1) { width = maxSize; height = (int) (width / bitmapRatio); } else { height = maxSize; width = (int) (height * bitmapRatio); } return Bitmap.createScaledBitmap(image, width, height, true); } 

change your onActivityResult in SELECT_PHOTO case like this:

   case SELECT_PHOTO:
        if (resultCode == RESULT_OK) {
            try {
                Uri imageUri = imageReturnedIntent.getData();
                InputStream imageStream = getContentResolver().openInputStream(imageUri);
                Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);

                selectedImage = getResizedBitmap(selectedImage, 400);// 400 is for example, replace with desired size

                imageView.setImageBitmap(selectedImage);


            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }