This lesson teaches how to capture a photo by delegating the work to another camera app on the device. If you'd rather build your own camera functionality, see Controlling the Camera. Suppose you are implementing a crowd-sourced weather service that makes a global weather map by blending together pictures of the sky taken by devices running your client app.
Integrating photos is only a small part of your application. You want to take photos with minimal fuss, not reinvent the camera. Happily, most Android-powered devices already have at least one camera application installed. In this lesson, you learn how to make it take a picture for you. If an essential function of your application is taking pictures, then restrict its visibility on Google Play to devices that have a camera.
If your application uses, but does not require a camera in order to function, instead set android:required to false. In doing so, Google Play will allow devices without a camera to download your application. It's then your responsibility to check for the availability of the camera at runtime by calling hasSystemFeature PackageManager.
If a camera is not available, you should then disable your camera features.
The Android way of delegating actions to other applications is to invoke an Intent that describes what you want done. This process involves three pieces: The Intent itself, a call to start the external Activityand some code to handle the image data when focus returns to your activity. Notice that the startActivityForResult method is protected by a condition that calls resolveActivitywhich returns the first activity component that can handle the intent.
Performing this check is important because if you call startActivityForResult using an intent that no app can handle, your app will crash. So as long as the result is not null, it's safe to use the intent.
If the simple feat of taking a photo is not the culmination of your app's ambition, then you probably want to get the image back from the camera application and do something with it.
The Android Camera application encodes the photo in the return Intent delivered to onActivityResult as a small Bitmap in the extras, under the key "data". The following code retrieves this image and displays it in an ImageView. Note: This thumbnail image from "data" might be good for an icon, but not a lot more.
Dealing with a full-sized image takes a bit more work. The Android Camera application saves a full-size photo if you give it a file to save into. You must provide a fully qualified file name where the camera app should save the photo. Generally, any photos that the user captures with the device camera should be saved on the device in the public external storage so they are accessible by all apps. The write permission implicitly allows reading, so if you need to write to the external storage then you need to request only one permission:.
However, if you'd like the photos to remain private to your app only, you can instead use the directory provided by getExternalFilesDir. On Android 4. Beginning with Android 4. Sony a6400 hdmi output Files you save in the directories provided by getExternalFilesDir or getFilesDir are deleted when the user uninstalls your app. Once you decide the directory for the file, you need to create a collision-resistant file name.
You may wish also to save the path in a member variable for later use. Here's an example solution in a method that returns a unique file name for a new photo using a date-time stamp:.
With this method available to create a file for the photo, you can now create and invoke the Intent like this:. For more recent apps targeting Android 7. Therefore, we now present a more generic way of storing images using a FileProvider.
When you create a photo through an intent, you should know where your image is located, because you said where to save it in the first place.Hi there, I have currently finished the Ribbit app course for android and when i view the image taken with the camera intent either on Parse or on my device using the Ribbit app, it always displays landscape even though I took the photo portrait.
I have heard you can edit the EXIF data once the photo has been taken so every photo you take on any device will be uploaded to Parse with the correct orientation. I'm using the FileHelper. First things first - if you log or debug, can you tell if you are able to detect the orientation properly? Is the correct value being used for the file, or is everything set to Portrait? Once you have that data, you'll need to update the file itself.
I'm not sure how to view the rotation data, all i see in the debugger under the variables mMediaUri is a load of data and numbers. Straight after this code i set the data mMediaUri to the recipients intent, is there a way to get the rotatedBitmap from the above code and set it to the mMediaUri variable or is this not possible? If you confirm that this part is working, then it's probably easier to make the rotatedBitmap when you retrieve the image from Parse and then just displaying the rotated image in the ImageView.
The values for the orientString, orientation and the rotationAngle all show up as 0 which is odd, is this the actual data from the image i took? Hey Liam, by any chance did you come up with a solution to this problem? My log also returns values of all 0's, which I believe is the result of mMediaUri not returning the correct path.
Any help would be appreciated. I don't believe that anyone has resolved the sideways loading of portrait images issue. Hi Liam, I hope my solution would still help people, I found out that this behaviour is mostly found on samsung devices You can call the method below just after the image resizing.
Now the inner missing methods, here we depend on the origin of the uri, if it comes from the gallery or the camera that's what the if statement is about, and then we rotate apropietly:. Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post. I forgot my password. Liam Hales Points. Can someone please help me out? Options ; bounds.The app takes a photo in portrait and stores it, then shows it in a list but it is in landscape mode. When I click on it and do a full screen it is also in landscape mode. I am suspecting it is being saved in landscape but I can't find a way to specify the orientation anywhere. You need to rotate it yourself.
Take a look at the code in the answer to this StackOverflow question. Here is my adjustments to the LoadAndResizeBitmap extension that will see what orientation it was saved in and if it was portrait, it will rotate it to the correct position I just had to copy paste your code. It working for me too now!! I have short amount of time to accomplish this and don't have time right now to do trial and error. Will look at the code in detail and learn later when I have time. Thanks for posting the resolution code to the problem.
For me working Case "0" for Landscape, but your code is perfect!!! CreateBitmap resizedBitmap, 0, 0, resizedBitmap. Width, resizedBitmap. Height, mtx, false ; mtx. Had exactly this problem to solve, and this post has saved a lot of digging to get it working. I've discovered there's an enum Android. Orientation which avoids the string case statement:.
I've used the code above and it works perfectly if I'm just capturing a few images. When I tried take about 6 photos, it throws an out of memory exception when it's creating the resizedBitmap.
Height, mtx, false. The example on the site also throws the out of memory exception when I take around photos continuously. I've been disposing of the Bitmap object as I go along using a using statement and am now out of ideas as to how to fix this. LoadAndResizeBitmap width, height. You need resizedBitmap.
Recycle ; to avoid memory issues. Xamarin Inc.A utility class which helps ease integration with Barcode Scanner via Intent s. This is a simple way to invoke barcode scanning and receive the result, without any need to integrate, modify, or learn the project's source code. To integrate, create an instance of IntentIntegrator and call initiateScan and wait for the result in your app. It does require that the Barcode Scanner or work-alike application is installed.
The initiateScan method will prompt the user to download the application, if needed.How To Track Orientation with Arduino - ADXL345 Accelerometer Tutorial
There are a few steps to using this integration. First, your Activity must implement the method Activity. Note that initiateScan returns an AlertDialog which is non-null if the user was prompted to download the application. This lets the calling app potentially manage the dialog. In particular, ideally, the app dismisses the dialog if it's still active in its Activity. Finally, you can use addExtra String, Object to add more parameters to the Intent used to invoke the scanner.
This can be used to set additional options not directly exposed by this simplified API. By default, this will only allow applications that are known to respond to this intent correctly do so. The apps that are allowed to response can be set with setTargetApplications List. Call this from your Activity 's Activity. Skip navigation links. Object com. Initiating a barcode scan To integrate, create an instance of IntentIntegrator and call initiateScan and wait for the result in your app.
Some code, particularly download integration, was contributed from the Anobiit application. AlertDialog initiateScan Initiates a scan for all known barcode types with the default camera.
Shares the given text by encoding it as a barcode, such that another user can scan the text off the screen of the device. Start an activity. This method is defined to allow different methods of activity starting for newer versions of Android and for compatibility library.Integrating camera can be done in two ways.
One is to use android inbuilt camera app which is very easy process. This way will be appropriate when your app need just a picture or video from camera. Second way is to build a custom camera interface and adding the functionality.
This needs higher effort as we have to do everything by our own. Building custom camera interface will be useful when you are building an app which mainly deals with images and videos like WhatsApp. These are some strings that we are going to use in our project. It contains one Button to trigger capture image and an ImageView to display captured image. Open your AndroidManifest. This permissions will require to Capture Image. Now open your MainActivity. Create new java class naming CameraUtils.
We have to pass the Uri and it will return image path. Caused by: android.
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Droid Android Basics Comments: 2. Please allow both permission to take picture. Context; import android. DialogInterface; import android. Intent; import android. PackageManager; import android. Uri; import android. Build; import android. Bundle; import android. MediaStore; import android. NonNull; import android.
ActivityCompat; import android. ContextCompat; import android.
The problem is that all the photos that are taken are rotated with 90 degrees-horizontally aligned. The above answer is very thorough, but I found I had to do a little bit more in order for every case to work, especially if you're dealing with images from other sources such as the Gallery or Google Photos.
Here's my DetermineOrientation method. I have a utility class where this is located so I have to pass in the Activity in order to use managedQuery which btw is deprecated so use cautiously. The reason I have to use two methods is because, depending on the source of the image, ExifInterface will not work. For instance, if I take a camera photo, Exif works fine.
However, if I'm also choosing images from the Gallery or Google Drive, Exif does not work and always returns 0.
Hope this helps someone. Learn more. Asked 8 years, 8 months ago. Active 1 year, 6 months ago. Viewed 23k times. So can anyone help me??? Alex Cohn The code you posted is for receiving the Image after it has been captured.I have written a post about simple Android Barcode Scanner and received few comments about. There is no simple way to change that and we have to edit the library files. Zxing library is open source and we can modify the layouts and include it into our project.
After some research and looking into the code on github I found another implementation of Zxing Library. This implementation is not affiliated by the official Zxing guys but the developer did all the changes which we needed for the scanner to open in vertical mode. This implementation is available as a dependency via jcentre and supports Intents, which makes it a perfect fit for our use case.
Create a new project in android studio and add the following code into build. We are modifying the application build. This code only works for API version 23 and over. Android phones are getting the latest OS releases a lot quicker now days so I have decided not to cover legacy phones.
I have a simple layout which I have used in my recent posts, we will re-use it again. In the HomeActivity. This function will use Intent and launch the scanner. The result of scan will be passed to this function. The library has CaptureActivity. Now add the Activity defination in AndroidManifest. We have to update the Intent integrator to use our Activity as CaptureActivity.
Turning the flash on and off is already added in the library by using volume up and volume down buttons. Volume up button will turn the camera flash on and volume down will turn the camera flash off. However there is no support for the default state of camera flash in the intent. In this library we can specify the capture activity via intent and it will allow us to define our custom activity and do the changes that we need.
The source code for this file is located on my github at TorchOnCaptureActivity. We have to make the changes in the onCreate method so I have decided to create a new activity instead of extending the original CaptureActivity.
The scanner view already has a function called setTorchOn which is used in event handling of volume up button. We will use the same function and call it immediately after initializing the view in onCreate method.
If you notice I have kept the screenOrientation as fullSensor for vertical orientation. Now go to the HomeActivity and change the scanNow function. However we have to make it configurable, so that we can decide from our intent if we want the camera flash on by default. Intent has a method called addExtra which we can use to add any additional data to the intent and receive the same at the activity which intent is starting.
We will add a boolean flag to the intent to set camera flash on. We need to provide a key name for this flag so that we can use the same name to access the data at receiving activity. As a best practice all your constants should be defined in a separate class.
This will reduce the amount of code change if you ever have to change the key name. We will use this constant to send flag for turning the flash On. Modify the scanNow function in HomeActivity and add. We will now modify our TorchOnCaptureActivity class to check for this flag and turn the flash on if the flag it set to boolean true.
Although by default volume-up and volume-down button of the phone can turn the camera flash on and off but it will be more user friendly if we have a button on the scan screen to turn the camera flash on and off.