/**
     * 打开照相机
     */
    public void takePhoto(){
        //创建File对象，用于存储拍照后的图片
        File outputImage = new File(Environment.getExternalStorageDirectory(),"tempImage.jpg");

        if(outputImage.exists()){
            outputImage.delete();
        }

        try {
            outputImage.createNewFile();//创建文件
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        imageUri = Uri.fromFile(outputImage);
        Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
        intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);<span style="white-space:pre">    </span>//将图片结果以 URI 形式返回
        startActivityForResult(intent, TAKE_PHOTO);

    }

    /**
     * 打开相册
     */
    public void openAlbum(){
        File outputImage = new File(Environment.getExternalStorageDirectory(), "output_image.jpg");
        try {
            if (outputImage.exists()) {
                outputImage.delete();
            }
            outputImage.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        imageUri = Uri.fromFile(outputImage);
        Intent intent = new Intent("android.intent.action.PICK");
        intent.setType("image/*");
        intent.putExtra("crop", true);
        intent.putExtra("scale", true);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        startActivityForResult(intent, TAKE_PHOTO);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        switch (requestCode) {
        case TAKE_PHOTO:
            if (resultCode == Activity.RESULT_OK) {
                if (data != null) {
                    imageUri = data.getData();<span style="white-space:pre">    </span>//getData返回的也是图片的 URI

                }
                Intent intent = new Intent("com.android.camera.action.CROP");
                intent.setDataAndType(imageUri, "image/*");
                intent.putExtra("scale", true);<span style="white-space:pre">       </span>//设置可裁剪
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, CROP_PHOTO); // 启动裁剪程序
            }
            break;
        case CROP_PHOTO:
            if (resultCode == Activity.RESULT_OK) {
                try {
                    Bitmap bitmap = BitmapFactory.decodeStream (getContext().getContentResolver().openInputStream(imageUri));

                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }
            }
            break;
        default:
            break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }