How to capture a custom image size with the camera

问题:

How to capture an square image in android? I want to capture an square image (such as 300x300 pixel) by calling Camera through intent in android, how can I do this?

回答1:

EDIT: This is deprecated since API level 21.

Use the Camera.Size nested class

http://developer.android.com/reference/android/hardware/Camera.Size.html

From the android reference:

http://developer.android.com/reference/android/hardware/Camera.html

Class Overview

The Camera class is used to set image capture settings, start/stop preview, snap pictures, and retrieve frames for encoding for video. This class is a client for the Camera service, which manages the actual camera hardware.

Make sure that the size is supported by the camera (and most probably it won't). If not, take a picture at the closest resolution and crop it or resize it.

Camera myCamera = Camera.open(0);
List<Camera.Size> sizes = myCamera.getPArameters().getSupportedPictureSizes();

To learn about camera intents, check these questions already in SO:

Android camera intent

Camera intent android

回答2:

Why nobody mentioned something like this?

Bitmap resultBitmap = Bitmap.createBitmap(sourceBitmap, xStart, yStart, 300, 300);

where sourceBitmap is original capture from camera and xStart and yStart location from where cropping will start. The result should have xStart, yStart in top left corner.