Android : 将图库功能与相机捕捉相结合
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【中文标题】Android : 将图库功能与相机捕捉相结合【英文标题】：Android : Integrating gallery functionality with camera capture 【发布时间】：2016-02-29 13:13:19 【问题描述】：我正在开发一个 android 项目，在该项目中，用户可以单击 button 并打开相机以上传图像。上传按钮被隐藏，直到拍摄图像并在预览中显示。
我想做的是使用相同的上传按钮，我现在默认设置为可见，单击它时，我想打开一个图库，然后用户可以使用它来选择图像，它会在预览中显示。
我有一个布尔标志来管理这个，如果标志为假，则打开图库，否则上传预览中的图像。
我有这个，但我不知道如何打开画廊，然后将图像发送到预览，上传。我是 Android 编程新手，所以请考虑到这一点。
我搜索了类似的功能，但问题是，我还没有找到集成这些功能的地方。
Java 代码：
RobotoTextView BtnSelectImage;
private ImageView ImgPhoto;
CheckBox profilePhotoCheckBox;
final RestaurantImageServiceImpl restaurantService = new RestaurantImageServiceImpl();
private static final int CAMERA_PHOTO = 111;
private Uri imageToUploadUri;
private static volatile Bitmap reducedSizeBitmap;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
private static boolean galleryFlag = false;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.add_restaurant_images);
ImgPhoto = (ImageView) findViewById(R.id.userPhotoImageView);
BtnSelectImage = (RobotoTextView) findViewById(R.id.userPhotoButtonSelect);
profilePhotoCheckBox = (CheckBox)findViewById(R.id.profilePhotoCheckBox);
BtnSelectImage.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
try
galleryFlag = true;
captureCameraImage();
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))
if(!galleryFlag)
// I think the gallery open code should come here.
if (profilePhotoCheckBox.isChecked())
uploadImage(true);
else
uploadImage(false);
new AlertDialog.Builder(AddPhotosForRestaurant.this)
.setTitle("Add more photos")
.setMessage("Are you sure you want to add more photos?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
finish();
startActivity(getIntent());
)
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
Intent intent = new Intent(getApplicationContext(), RestaurantMenu.class);
startActivity(intent);
finish();
)
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
);
private Bitmap getBitmap(String path)
Uri uri = Uri.fromFile(new File(path));
InputStream in = null;
try
final int IMAGE_MAX_SIZE = 1200000; // 1.2MP
in = getContentResolver().openInputStream(uri);
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, o);
in.close();
int scale = 1;
while ((o.outWidth * o.outHeight) * (1 / Math.pow(scale, 2)) >
IMAGE_MAX_SIZE)
scale++;
Log.d("", "scale = " + scale + ", orig-width: " + o.outWidth + ", orig-height: " + o.outHeight);
Bitmap b = null;
in = getContentResolver().openInputStream(uri);
if (scale > 1)
scale--;
// scale to max possible inSampleSize that still yields an image
// larger than target
o = new BitmapFactory.Options();
o.inSampleSize = scale;
b = BitmapFactory.decodeStream(in, null, o);
// resize to desired dimensions
int height = b.getHeight();
int width = b.getWidth();
Log.d("", "1th scale operation dimenions - width: " + width + ", height: " + height);
double y = Math.sqrt(IMAGE_MAX_SIZE
/ (((double) width) / height));
double x = (y / height) * width;
Bitmap scaledBitmap = Bitmap.createScaledBitmap(b, (int) x,
(int) y, true);
b.recycle();
b = scaledBitmap;
System.gc();
else
b = BitmapFactory.decodeStream(in);
in.close();
Log.d("", "bitmap size - width: " + b.getWidth() + ", height: " +
b.getHeight());
return b;
catch (IOException e)
Log.e("", e.getMessage(), e);
return null;
private void captureCameraImage()
Intent chooserIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(Environment.getExternalStorageDirectory(), "POST_IMAGE.jpg");
chooserIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
imageToUploadUri = Uri.fromFile(f);
startActivityForResult(chooserIntent, CAMERA_PHOTO);
@Override
public void onBackPressed()
Intent intent = new Intent(this, Login.class);
StaticRestTemplate.setReplyString("");
StaticRestTemplate.setLoggedInUser("");
StaticRestTemplate.setJsessionid("");
startActivity(intent);
finish();
@Override
protected void onActivityResult(final int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CAMERA_PHOTO && resultCode == Activity.RESULT_OK)
if(imageToUploadUri != null)
Uri selectedImage = imageToUploadUri;
getContentResolver().notifyChange(selectedImage, null);
reducedSizeBitmap = getBitmap(imageToUploadUri.getPath());
if(reducedSizeBitmap != null)
ImgPhoto.setImageBitmap(reducedSizeBitmap);
RobotoTextView uploadImageButton = (RobotoTextView) findViewById(R.id.uploadUserImageButton);
uploadImageButton.setVisibility(View.VISIBLE);
else
Toast.makeText(this,"Error while capturing Image",Toast.LENGTH_LONG).show();
else
Toast.makeText(this,"Error while capturing Image",Toast.LENGTH_LONG).show();
private void uploadImage(boolean profilePhoto)
if(!(reducedSizeBitmap == null))
if(reducedSizeBitmap == null)
Log.d("Image bitmap"," Is null");
reducedSizeBitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
this.restaurantService.addRestaurantImage(byteArray,profilePhoto);
我希望这么多信息就足够了。谁能指出我应该把哪些功能放在哪里。非常感谢。 :-)
使用答案编辑
最终集成工作。我必须将收到的答案和here on SO 结合起来。 最终代码
public class AddPhotosForRestaurant extends RestaurantDrawerActivity
RobotoTextView BtnSelectImage;
private ImageView ImgPhoto;
CheckBox profilePhotoCheckBox;
final RestaurantImageServiceImpl restaurantService = new RestaurantImageServiceImpl();
private static final int CAMERA_PHOTO = 111;
public static final int GALLERY_INTENT_REQUEST_CODE = 0x000005;
private Uri imageToUploadUri = null;
private static volatile Bitmap reducedSizeBitmap;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
private boolean galleryFlag = false;
private boolean uploadNow = false;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.add_restaurant_images);
set(null, null);
final RobotoTextView uploadImageButton = (RobotoTextView) findViewById(R.id.uploadUserImageButton);
ImgPhoto = (ImageView) findViewById(R.id.userPhotoImageView);
BtnSelectImage = (RobotoTextView) findViewById(R.id.userPhotoButtonSelect);
profilePhotoCheckBox = (CheckBox) findViewById(R.id.profilePhotoCheckBox);
BtnSelectImage.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
try
galleryFlag = true;
captureCameraImage();
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))
if (uploadNow)
uploadNow = false;
galleryFlag = true;
if (profilePhotoCheckBox.isChecked())
uploadImage(true);
else
uploadImage(false);
if (!galleryFlag)
galleryFlag = true;
uploadNow = true;
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"),
GALLERY_INTENT_REQUEST_CODE);
else
if (profilePhotoCheckBox.isChecked())
uploadImage(true);
else
uploadImage(false);
new AlertDialog.Builder(AddPhotosForRestaurant.this)
.setTitle("Add more photos")
.setMessage("Are you sure you want to add more photos?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
finish();
startActivity(getIntent());
)
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
Intent intent = new Intent(getApplicationContext(), RestaurantMenu.class);
startActivity(intent);
finish();
)
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
);
private Bitmap getBitmap(String path)
Uri uri = Uri.fromFile(new File(path));
InputStream in = null;
try
final int IMAGE_MAX_SIZE = 1200000; // 1.2MP
in = getContentResolver().openInputStream(uri);
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, o);
in.close();
int scale = 1;
while ((o.outWidth * o.outHeight) * (1 / Math.pow(scale, 2)) >
IMAGE_MAX_SIZE)
scale++;
Bitmap b;
in = getContentResolver().openInputStream(uri);
if (scale > 1)
scale--;
// scale to max possible inSampleSize that still yields an image
// larger than target
o = new BitmapFactory.Options();
o.inSampleSize = scale;
b = BitmapFactory.decodeStream(in, null, o);
// resize to desired dimensions
int height = b.getHeight();
int width = b.getWidth();
double y = Math.sqrt(IMAGE_MAX_SIZE
/ (((double) width) / height));
double x = (y / height) * width;
Bitmap scaledBitmap = Bitmap.createScaledBitmap(b, (int) x,
(int) y, true);
b.recycle();
b = scaledBitmap;
System.gc();
else
b = BitmapFactory.decodeStream(in);
in.close();
return b;
catch (IOException e)
return null;
private void captureCameraImage()
Intent chooserIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(Environment.getExternalStorageDirectory(), "POST_IMAGE.jpg");
chooserIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
imageToUploadUri = Uri.fromFile(f);
startActivityForResult(chooserIntent, CAMERA_PHOTO);
@Override
public void onBackPressed()
Intent intent = new Intent(this, Login.class);
StaticRestTemplate.setReplyString("");
StaticRestTemplate.setLoggedInUser("");
StaticRestTemplate.setJsessionid("");
startActivity(intent);
finish();
@Override
protected void onActivityResult(final int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CAMERA_PHOTO && resultCode == Activity.RESULT_OK)
if (imageToUploadUri != null)
Uri selectedImage = imageToUploadUri;
getContentResolver().notifyChange(selectedImage, null);
reducedSizeBitmap = getBitmap(imageToUploadUri.getPath());
if (reducedSizeBitmap != null)
ImgPhoto.setImageBitmap(reducedSizeBitmap);
RobotoTextView uploadImageButton = (RobotoTextView) findViewById(R.id.uploadUserImageButton);
uploadImageButton.setVisibility(View.VISIBLE);
else
Toast.makeText(this, "Error while capturing Image", Toast.LENGTH_LONG).show();
else
Toast.makeText(this, "Error while capturing Image", Toast.LENGTH_LONG).show();
if (requestCode == GALLERY_INTENT_REQUEST_CODE && resultCode == Activity.RESULT_OK)
try
Uri selectedImage = Uri.parse(data.getDataString());
reducedSizeBitmap = MediaStore.Images.Media.getBitmap(
getApplicationContext().getContentResolver(),
selectedImage);
ImgPhoto.setImageBitmap(reducedSizeBitmap);
catch (Exception e)
Toast.makeText(this, "Error while selecting Image", Toast.LENGTH_LONG).show();
private void uploadImage(boolean profilePhoto)
if (!(reducedSizeBitmap == null))
reducedSizeBitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
this.restaurantService.addRestaurantImage(byteArray, profilePhoto);
非常感谢您的帮助.. :-)
【问题讨论】：
【参考方案1】：在我的情况下写入常量文件（ActivityConstantUtils.java）
public static final int GALLERY_INTENT_REQUEST_CODE = 0x000005;
要打开图库并获取所选图像的路径，请使用以下代码：
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
mActPanelFragment.startActivityForResult(photoPickerIntent, ActivityConstantUtils.GALLERY_INTENT_REQUEST_CODE);
之后你在 onActivityResult() 方法中获得路径
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
(requestCode == ActivityConstantUtils.GALLERY_INTENT_REQUEST_CODE && resultCode == Activity.RESULT_OK)
try
String imagePath = getFilePath(data);
// TODO: Here you set data to preview screen
catch(Exception e)
private String getFilePath(Intent data)
String imagePath;
Uri selectedImage = data.getData();
String[] filePathColumn = MediaStore.Images.Media.DATA;
Cursor cursor = getActivity().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imagePath = cursor.getString(columnIndex);
cursor.close();
return imagePath;
【讨论】：
您好，感谢您的回答。我已经集成了它，但它每次都选择了错误的图像来显示和从图库上传。我已经在主帖中发布了更新的代码。你能看看我做错了什么吗？谢谢.. :-) @We are Borg: 抱歉回复晚了这个问题解决了还是需要检查一下？ 是的。解决了。就像我在评论中提到的那样，从您和链接中回答.. :-)以上是关于Android : 将图库功能与相机捕捉相结合的主要内容，如果未能解决你的问题，请参考以下文章
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当相机应用程序打开以在 android studio 中获取图像时，您可以打开图库吗？