问题
I have been trying to get path of captured image in order to delete image. Found many answers on StackOverflow but none of them are working for me. I got the following answer:
private String getLastImagePath() {
final String[] imageColumns = { MediaStore.Images.Media._ID,
MediaStore.Images.Media.DATA };
final String imageOrderBy = MediaStore.Images.Media._ID + \" DESC\";
Cursor imageCursor = POS.this.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, imageColumns,
null, null, imageOrderBy);
if (imageCursor.moveToFirst()) {
// int id = imageCursor.getInt(imageCursor
// .getColumnIndex(MediaStore.Images.Media._ID));
String fullPath = imageCursor.getString(imageCursor
.getColumnIndex(MediaStore.Images.Media.DATA));
return fullPath;
} else {
return \"\";
}
}
This code works in Samsung tab but doesn\'t work in Lenovo tab and i-ball tab. So, can anyone help me find another solution to do the same? Any help will be appreciated. Thank you.
This is my onActivityResult:
if (requestCode == CmsInter.CAMERA_REQUEST && resultCode == RESULT_OK) {
//Bitmap photo = null;
//photo = (Bitmap) data.getExtras().get(\"data\");
String txt = \"\";
if (im != null) {
String result = \"\";
//im.setImageBitmap(photo);
im.setTag(\"2\");
int index = im.getId();
String path = getLastImagePath();
try {
bitmap1 = BitmapFactory.decodeFile(path, options);
bitmap = Bitmap.createScaledBitmap(bitmap1, 512, 400, false);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] bytData = baos.toByteArray();
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
result = Base64.encode(bytData);
bytData = null;
} catch (OutOfMemoryError ooM) {
System.out.println(\"OutOfMemory Exception----->\" + ooM);
bitmap1.recycle();
bitmap.recycle();
} finally {
bitmap1.recycle();
bitmap.recycle();
}
}
}
回答1:
Try like this
Pass Camera Intent like below
Intent intent = new Intent(this);
startActivityForResult(intent, REQ_CAMERA_IMAGE);
And after capturing image Write an OnActivityResult as below
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
knop.setVisibility(Button.VISIBLE);
// CALL THIS METHOD TO GET THE URI FROM THE BITMAP
Uri tempUri = getImageUri(getApplicationContext(), photo);
// CALL THIS METHOD TO GET THE ACTUAL PATH
File finalFile = new File(getRealPathFromURI(tempUri));
System.out.println(mImageCaptureUri);
}
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
String path = "";
if (getContentResolver() != null) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
path = cursor.getString(idx);
cursor.close();
}
}
return path;
}
And check log
Edit:
Lots of people are asking how to not get a thumbnail. You need to add this code instead for the getImageUri method:
public Uri getImageUri(Context inContext, Bitmap inImage) {
Bitmap OutImage = Bitmap.createScaledBitmap(inImage, 1000, 1000,true);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), OutImage, "Title", null);
return Uri.parse(path);
}
The other method Compresses the file. You can adjust the size by changing the number 1000,1000
回答2:
There is a solution to create file (on external cache dir or anywhere else) and put this file's uri as output extra to camera intent - this will define path where taken picture will be stored.
Here is an example:
File file;
Uri fileUri;
final int RC_TAKE_PHOTO = 1;
private void takePhoto() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
file = new File(getActivity().getExternalCacheDir(),
String.valueOf(System.currentTimeMillis()) + ".jpg");
fileUri = Uri.fromFile(file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
getActivity().startActivityForResult(intent, RC_TAKE_PHOTO);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RC_TAKE_PHOTO && resultCode == RESULT_OK) {
//do whatever you need with taken photo using file or fileUri
}
}
}
Then if you don't need the file anymore, you can delete it using file.delete();
By the way, files from cache dir will be removed when user clears app's cache from apps settings.
回答3:
Here I updated the sample code in Kotlin. Please note on Nougat and above version Uri.fromFile(file) is not working and it crashes the app for that need to implement FileProvider which is safest way to send files from intent. For implementing this refer this answer or this article
private fun takePhotoFromCamera() {
val isDeviceSupportCamera: Boolean = this.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)
if (isDeviceSupportCamera) {
val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
file = File(getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS + "/attachments")!!.path,
System.currentTimeMillis().toString() + ".jpg")
// fileUri = Uri.fromFile(file)
fileUri = FileProvider.getUriForFile(this, this.applicationContext.packageName + ".provider", file!!)
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri)
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP) {
takePictureIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
}
startActivityForResult(takePictureIntent, Constants.REQUEST_CODE_IMAGE_CAPTURE)
}
} else {
Toast.makeText(this, this.getString(R.string.camera_not_supported), Toast.LENGTH_SHORT).show()
}
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (resultCode == Activity.RESULT_OK) {
if(requestCode == Constants.REQUEST_CODE_IMAGE_CAPTURE) {
realPath = file?.path
//do what ever you want to do
}
}
}
回答4:
Try this method to get path of original image captured by camera.
public String getOriginalImagePath() {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getActivity().managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, null, null, null);
int column_index_data = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToLast();
return cursor.getString(column_index_data);
}
This method will return path of the last image captured by camera. So this path would be of original image not of thumbnail bitmap.
回答5:
Please refer to Google Documentation: Camera - Photo Basics
回答6:
try this
String[] projection = { MediaStore.Images.Media.DATA };
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(mCapturedImageURI, projection,
null, null, null);
int column_index_data = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
image_path = cursor.getString(column_index_data);
Log.e("path of image from CAMERA......******************.........",
image_path + "");
for capturing image:
String fileName = "temp.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
values.clear();
来源：https://stackoverflow.com/questions/20327213/getting-path-of-captured-image-in-android-using-camera-intent