java – 通过摄像头拍摄照片并以bytearray形式发送到服务器

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我正在开发一个Andorid应用程序,我希望用户在其中拍照,然后保存它我将它发送到服务器.现在,我将图片作为字节数组发送到服务器.当我尝试将字节数组作为PNG文件保存到文件中,然后尝试打开文件时,图像查看器会抱怨PNG有错误而无法显示. PNG文件大小为122Kb.

当我尝试使用Scalr库来调整图像大小时,它表示图像源不能为空.直接保存字节数会导致PNG损坏.我应该如何将文件正确转换并发送到服务器,因此没有错误.
这是我正在使用并发送它的相机代码.

public class AddPhotoForUser extends DrawerLoader {

    private static final int CAMERA_PIC_REQUEST = 22;
    Button BtnSelectImage;
    private ImageView ImgPhoto;
    private static volatile Bitmap photo;
    private static volatile ByteArrayOutputStream stream = new ByteArrayOutputStream();

    final PersonServiceImpl personService = new PersonServiceImpl();

    private String[] navMenuTitles;
    private TypedArray navMenuIcons;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.upload_user_photo);

        navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
        navMenuIcons = getResources()
                .obtainTypedArray(R.array.nav_drawer_icons);

        set(navMenuTitles, navMenuIcons);

        Button uploadImageButton = (Button) findViewById(R.id.uploadUserImageButton);
        uploadImageButton.setVisibility(View.INVISIBLE);

        ImgPhoto = (ImageView) findViewById(R.id.userPhotoImageView);
        BtnSelectImage = (Button) findViewById(R.id.userPhotoButtonSelect);
        BtnSelectImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {

                    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                    startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);

                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), "Couldn't load photo", Toast.LENGTH_LONG).show();
                }
            }
        });

        uploadImageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!(v == null)) {
                    uploadImage();
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    Intent intent = new Intent(AddPhotoForUser.this, RestaurantList.class);
                    startActivity(intent);
                    finish();

                }
            }
        });

    }

    @Override
    public void onBackPressed() {
        Intent intent = new Intent(AddPhotoForUser.this, Login.class);
        startActivity(intent);
        finish();
    }

    @Override
    public void onActivityResult(final int requestCode, int resultCode, Intent data) {
        try {
            switch (requestCode) {
                case CAMERA_PIC_REQUEST:
                    if (resultCode == RESULT_OK) {
                        try {
                            photo = (Bitmap) data.getExtras().get("data");
                            if (!(photo == null)) {
                                ImgPhoto.setImageBitmap(photo);
                                Button uploadImageButton = (Button) findViewById(R.id.uploadUserImageButton);
                                uploadImageButton.setVisibility(View.VISIBLE);

                            }
                        } catch (Exception e) {
                            Toast.makeText(this, "Couldn't load photo", Toast.LENGTH_LONG).show();
                        }
                    }
                    break;
                default:
                    break;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }


    }

    private void uploadImage() {

        if (!(photo == null)) {
            photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
            byte[] byteArray = stream.toByteArray();
            personService.addUserProfilePhoto(byteArray);
        }

    }
}

以下是将映像保存到磁盘的服务器端代码：

 @Override
    public Boolean updateProfilePhoto(byte[] photo) {
        Person person = getCurrentlyAuthenticatedPerson();
        try{
           InputStream in = new ByteArrayInputStream(photo);
            BufferedImage image = ImageIO.read(in);
            image = Scalr.resize(image, Scalr.Method.QUALITY, 100, 100);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(image, "png", baos);
            baos.flush();
            File file = new File(userImagePath);
            if (file.exists() && file.isDirectory()) {
                OutputStream outputStream = new FileOutputStream(new File(userImagePath + person.getUserId()+".png"));
                outputStream.write(baos.toByteArray());
                outputStream.close();
            } else {
                File file1 = new File(userImagePath+person.getUserId()+".png");
                if (file1.exists()) {
                    try {
                        OutputStream outputStream = new FileOutputStream(file1);
                        outputStream.write(baos.toByteArray());
                        outputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();

                    }
                } else {
                   boolean result = file1.createNewFile();
                    System.out.println("Result of file1 creation is "+result);
                    OutputStream outputStream = new FileOutputStream(file1);
                    outputStream.write(baos.toByteArray());
                    outputStream.close();
                }
            }
            return true;
        }catch (Exception e){
            e.printStackTrace();
            return false;
        }
    }

如果我不使用Scalr库,则没有错误,但它是一个损坏的文件.这是Scalr错误日志：

java.lang.IllegalArgumentException: src cannot be null
    at org.imgscalr.Scalr.resize(Scalr.java:1564)
    at org.imgscalr.Scalr.resize(Scalr.java:1415)
    at com.journaldev.spring.service.PersonServiceImpl.updateProfilePhoto(PersonServiceImpl.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy51.updateProfilePhoto(Unknown Source)
    at com.journaldev.spring.Controller.PersonController.addProfilePhotoForUser(PersonController.java:100)

你能帮忙的话,我会很高兴.非常感谢.

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