I have seen a couple of other questions on S/O related to this, but the one that was closest to my issue doesn't seem to have got many responses (Xiaomi MI device not picking image from Gallery). Hoping this question will have better luck.
I am trying to select an image from the gallery of the phone, and pass the image path to another activity where it get previewed for the user.
I've tested this on two other devices (Moto E and something called Coolpad?) and they both seem to be working just fine.
(Debugging Android source code doesn't seem to be a practical option.)
In the main activity, on a UI trigger, I launch the gallery picker with the following code:
private void dispatchPickPictureIntent() {
Intent pickPictureIntent = new Intent(Intent.ACTION_PICK);
pickPictureIntent.setType("image/*");
startActivityForResult(pickPictureIntent, REQUEST_IMAGE_PICK);
}
I handle the result like so:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_PICK && resultCode == RESULT_OK) {
Uri selectedImage = data.getData();
mCurrentPhotoPath = getRealPathFromURI(this, selectedImage);
launchUploadActivity();
}
}
private String getRealPathFromURI(Context context, Uri uri) {
Cursor cursor = null;
try {
String [] proj = {MediaStore.Images.Media.DATA};
cursor = context.getContentResolver().query(uri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null)
cursor.close();
}
}
Once I have got the file path stored in the global variable mCurrentPhotoPath the following method gets called:
private void launchUploadActivity() {
Intent intent = new Intent(HomeActivity.this, UploadActivity.class);
intent.putExtra(getString(R.string.photo_path), mCurrentPhotoPath);
startActivityForResult(intent, REQUEST_IMAGE_UPLOAD);
}
Even on the Redmi, up until here, things run smoothly. On the onCreate method of the UploadActivity, I receive the image file path string successfully.
But, then, I try to preview the image:
private void previewPhoto() {
imageView.setVisibility(View.VISIBLE);
BitmapFactory.Options options = new BitmapFactory.Options();
// Avoid OutOfMemory Exception
options.inSampleSize = 8;
// This line returns a null, only on the Xiaomi device
final Bitmap bitmap = BitmapFactory.decodeFile(photopath, options);
imageView.setImageBitmap(bitmap);
}
Now I have tried to debug this issue, but once I step into BitmapFactory's source code, I run in to a seemingly unresolved issue with Android Studio (https://stackoverflow.com/a/40566459/3438497) which renders it useless.
Any pointers on how I can proceed from here would be greatly appreciated.
So I was able to narrow down the issue to an incorrect file path. The Uri to filepath function did not get the desired result on all devices.
I used the approach suggested here:https://stackoverflow.com/a/7265235/3438497
and tweaked the code a little bit so that when picking images from gallery, I use the Uri of the image directly.
The reason is that you get file:// uri back. not content:// so content resolver doesn't work.
I am facing the similar issue in Redmi 5A. And solve the problem using following way.
Add below entities in your manifest file
android:hardwareAccelerated="false"
android:largeHeap="true"
It will work in some environments.
Refer answer at https://stackoverflow.com/a/32245018/2706551
Related
So i am using retrofit to upload images to our server, and am using gallery chooser to choose the image. I am trying to get the path of the image, because uri.getPath() returns file not found exception. I have literally seen almost every stackoverflow article on this subject, and still have no answer. The following code that I have is similar to everything I have seen online, and it ALWAYS returns null, and I have no idea why. PLEASE HELP
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
try {
android.net.Uri selectedImage = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), selectedImage);
// Log.d(TAG, String.valueOf(bitmap));
ImageView imageView = (ImageView) findViewById(R.id.expandedProfilePic);
imageView.setImageBitmap(bitmap);
String[] filePathColumn = {MediaStore.Images.Media.DATA};
android.database.Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
if (cursor == null)
return;
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
// is always null
System.out.println("FILE PATH " + filePath);
} catch (IOException e) {
e.printStackTrace();
}
}
}
I am trying to get the path of the image, because uri.getPath() returns file not found exception
Assuming that by "gallery chooser", you mean ACTION_GET_CONTENT or possibly ACTION_PICK, there is no path, because a Uri is not a file.
I have literally seen almost every stackoverflow article on this subject
No, you have not. Specifically, you have not read any of the dozens that I have contributed to, such as this one or this one or this one or this one or this one or this one or this one or this one or this one or this one or this one or this one or this one. And those are just from 2017.
The following code that I have is similar to everything I have seen online
And that code will not work for most Uri values.
Use a ContentResolver and openInputStream() to get an InputStream on the content identified by the Uri. Ideally, you would just use the InputStream. In the case of Retrofit, while I have not tried uploading content with it, my guess is that it insists upon a file. In that case, use the InputStream and a FileOutputStream on some file that you control to make a copy of the content. Then, upload the copy, deleting it when you are done.
I have encountered a strange problem while working with a bitmap, I have an activity where I have a button where onClick() method is set to selectImage(view) and the method definition is as follows
public void selectImage(View v){
Intent imagePickerIntent = new Intent(Intent.ACTION_PICK);
File imageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
Uri data = Uri.parse(imageDir.getPath());
imagePickerIntent.setDataAndType(data, "image/*");
startActivityForResult(imagePickerIntent, 20);
}
and onActivityResult method is as follows:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode==20){
if(resultCode==RESULT_OK){
Uri outputFileDir = data.getData();
bitmap = BitmapFactory.decodeFile(outputFileDir.getPath(), options);
String result = getImageNameFromUri(outputFileDir);
selectedImageTV = (TextView)findViewById(R.id.selectedImageTV);
selectedImageTV.setText(result);
image.setImageBitmap(bitmap);
}
else{
return;
}
}
}
but decodeFile() method is returning null in Jio Lyf mobile (low resolution) while it is working fine on Xiaomi devices.
How can I assure that decodeFile() method always return decodedBitmap object on all android devices? Please suggest me ways to tackle such problem.
How can I assure that decodeFile() method always return decodedBitmap object on all android devices?
data.getData() is a Uri. It is not a file. It usually does not point to a file.
Furthermore, I would expect your code to fail on many Android devices, as there is no requirement that there be an ACTION_PICK activity that supports picking from a file Uri, in which case your startActivityForResult() call will crash.
If you want the user to pick a file, integrate a file-picker library.
How do I take a photo and save it to a specific folder. I know it saves to the sdcard/DCIM/etc
But I don't want it there, I want it to be stored in a folder in /sdcard/Camera
I have made the directory with the following :
String destPath = Android.OS.Environment.ExternalStorageDirectory + "/Camera";
Then I launch the camera intent and try point the save file to the path I made.
Intent launchCamera = new Intent(Android.Provider.MediaStore.ActionImageCapture);
launchCamera.PutExtra(MediaStore.ExtraOutput, destPath);
This isn't working. Images still get saved to /sdcard/dcim/etc
Ideas?
From what I gathered when I developed an application using Monodroid is that the camera is very buggy and does not do what you want it to most of the time. This includes specifying the destination where images capture are to be saved.
To my knowledge these issues aren't specific to Monodroid and do occur with the java android sdk.
A work around to this issue that you may want to look at is capturing the image without specifying a destination, then in the OnActivityResult method retrieve the latest image saved to the gallery. Once you get the latest image you can then move it to your preferred destination.
Here is some example code from within OnActivityResult.
Retrieve the filename of the captured image
Android.Net.Uri targetUri = data.Data;
String origin = "";
String [] proj = { MediaStore.MediaColumns.Data.ToString (), BaseColumns.Id };
var qry = ManagedQuery (MediaStore.Images.Media.ExternalContentUri, proj, null, null, "date_added DESC");
qry.MoveToFirst ();
origin = qry.GetString (qry.GetColumnIndexOrThrow (MediaStore.MediaColumns.Data.ToString ()));
Move the image to your desired destination
System.IO.File.Move (origin, "yourdestinationfilenamehere");
I'd like to add to lanks's solution.
Let's say you use the following code to take a picture
var uri = ContentResolver.Insert(MediaStore.Images.Media.ExternalContentUri,
new ContentValues());
var intent = new Intent(MediaStore.ActionImageCapture);
intent.PutExtra(MediaStore.ExtraOutput, uri);
StartActivityForResult(intent, ACTIVITY_RESULT_PICTURE_TAKEN);
pictureUri = uri;
Where the ACTIVITY_RESULT_PICTURE_TAKEN is just a simple value you can use in the
OnActivityResult to check which activity was completed.
Your OnActivityResult could look something like this:
protected override void OnActivityResult(int requestCode,
Result resultCode, Intent data)
{
if (resultCode == Result.Ok && requestCode == ACTIVITY_RESULT_PICTURE_TAKEN)
{
string picturePath = GetRealPathFromURI(pictureUri);
//Do something with the file
}
}
The Uri you got earlier is something specific to android and needs to be translated.
It looks like "//content://media/external/media/11917" which is not a
valid path.
Which is exactly what the GetRealPathFromURI function does:
public string GetRealPathFromURI(Android.Net.Uri contentUri)
{
var mediaStoreImagesMediaData = "_data";
string[] projection = { mediaStoreImagesMediaData };
Android.Database.ICursor cursor = this.ManagedQuery(contentUri, projection,
null, null, null);
int columnIndex = cursor.GetColumnIndexOrThrow(mediaStoreImagesMediaData);
cursor.MoveToFirst();
return cursor.GetString(columnIndex);
}
Once you've got the real path, you can move it to wherever you want as lanks suggested.
I need to remove an image from sd card chosen by user.
In my Activity, after an user select an image from gallery, i execute this code:
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Utils.imgUri = data.getData();
Utils.imgPath = getPath(Utils.imgUri);
File file = new File(Utils.imgPath);
boolean deleted = file.delete();
}
}
}
where getPath method is:
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
if(cursor!=null){
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
else return null;
}
The images are correctly removed but in the gallery still remain a preview of the removed image.
When i tap on it, is loaded a black image..
so, How can I update the gallery previews, after I delete some images from my app code?
Why would you make it that complex?
You can do it as simple as this:
getContentResolver().delete(Utils.imgUri, null, null);
Resolved adding:
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
It makes the MediaScanner service run again, which should remove the deleted image from the device's cache.
same problem here
Have you set the <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> permission in the manifest file?
Are you sure that the file path is correct? Because the way you do the actual delete should be fine, see this SO thread:
How to delete a file from SD card?
Should the /mnt/ really be there? Also, do you have the permissions to delete files from the storage? (android.permission.WRITE_EXTERNAL_STORAGE)
in the parameter "data" you have the Uri too, just do "data.getUri()". Also, are you testing in a real devices? if so and if it is a samsung, it isn't work (see this thread).
simple one line ;)
new File(uri.getPath()).delete();
and in manifest must use these permissions
android.permission.WRITE_EXTERNAL_STORAGE
add below code in onDestroy method:
if(myFile.exists())
myFile.delete();
and don't forget to add permission in Manifest file
android.permission.WRITE_EXTERNAL_STORAGE
I am working on an activity and associated tasks that allow users to select an image to use as their profile picture from the Gallery. Once the selection is made the image is uploaded to a web server via its API. I have this working regular images from the gallery. However, if the image selected is from a Picasa Web Album nothing is returned.
I have done a lot of debugging and narrowed the problem down to this method.
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
//cursor is null for picasa images
if(cursor!=null)
{
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
else return null;
}
Picasa images return a null cursor. MediaStore.Images.Media.DATA is not null for them, however. It only returns an #id, so I am guessing that there is no actual bitmap data at the address. Are Picasa images stored locally on the device at all?
I also noticed from the documentation that MediaStore.Images.ImageColumns.PICASA_ID exists. This value exists for selected picasa images but not other gallery images. I was thinking I could use this value to get a URL for the image if it is not store locally but I can not find any information about it anywhere.
I have faced the exact same problem,
Finally the solution I found, was to launch an ACTION_GET_CONTENT intent instead of an ACTION_PICK, then make sure you provide a MediaStore.EXTRA_OUTPUT extra with an uri to a temporary file.
Here is the code to start the intent :
public class YourActivity extends Activity {
File mTempFile;
int REQUEST_CODE_CHOOSE_PICTURE = 1;
(...)
public showImagePicker() {
mTempFile = getFileStreamPath("yourTempFile");
mTempFile.getParentFile().mkdirs();
Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mTempFile));
intent.putExtra("outputFormat",Bitmap.CompressFormat.PNG.name());
startActivityForResult(intent,REQUEST_CODE_CHOOSE_PICTURE);
}
(...)
}
You might need to mTempFile.createFile()
Then in onActivityResult, you will be able to get the image this way
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
case REQUEST_CODE_CHOOSE_PICTURE:
Uri imageUri = data.getData();
if (imageUri == null || imageUri.toString().length() == 0) {
imageUri = Uri.fromFile(mTempFile);
file = mTempFile;
}
if (file == null) {
//use your current method here, for compatibility as some other picture chooser might not handle extra_output
}
}
Hope this helps
Then you should delete your temporary file on finish (it is in internal storage as is, but you can use external storage, I guess it would be better).
Why are you using the managedQuery() method? That method is deprecated.
If you want to convert a Uri to a Bitmap object try this code:
public Bitmap getBitmap(Uri uri) {
Bitmap orgImage = null;
try {
orgImage = BitmapFactory.decodeStream(getApplicationContext().getContentResolver().openInputStream(uri));
} catch (FileNotFoundException e) {
// do something if you want
}
return orgImage;
}