Android从摄像头或相册中获取照片
关键代码：
/**
* 从相册中获取，返回结果会在onActivityResult()中
*/
private void selectPicFromAlbum() {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, RESULT_FROM_ALBUM);
}
/**
* 从摄像头中获取，返回结果会在onActivityResult()中
*/
private void selectPicFromCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, RESULT_FROM_CAMERA);
}
/**
