I am working on app which uses WebView to display its content. However, it needs to open camera or gallery in order to choose picture:
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, 1);
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, 2);
It's working fine on most devices, but on HTC One and few others both intents destroys my activity, so webview is being reloaded while going back. I don't have noHistory flag in AndroidManifest.xml. What might be causing that issue? Can I avoid destroying my activity here?
It is normally, that Android kills your Activity when other app runs.
You must save Activity state in onSaveInstanceState and when activity will be recreated restore state in onRestoreInstanceState or in onCreate.
To restore state of WebView you may use cookies and sessions and save last opened url. When activity will be recreated just navigate WebView last saved url and process result from camera.
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, 1);
By seeing your code I can judge that your motto is to capture the image and use it later on.
This is a known bug, The solution is that you need to create a separate folder for your application and before capturing you need to be sure that file is created and the same path you are giving to camera intent
Uri uriSavedImage=Uri.fromFile(new File("/sdcard/seperate/newImage.png"));
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra("output", uriSavedImage);
startActivityForResult(cameraIntent, 1);
Reference: image from camera intent issue in android
Maybe a stupid sugestion.
But since it's destroyed, it means the device was low on memory.
If the only annoyance is that the webview reloads, maybe you can solve this by caching the content?
For example in the onStop() method of you activity get the content of the webview and store it somewhere. temporary file, sqlite,... . and in onCreate check if there is a cache (and maybe how old it is) and if needed put that in the webview.
Tutorial to get html code from webview: http://lexandera.com/2009/01/extracting-html-from-a-webview/
If i m not wrong you are opening camera from device.Have you check that other app is not aquired the camera? you must acquire camera before starting camera activity may be some other app using camera instance.You must release the camera instance in on destroy or onstop method of activity so that next time it will available fr other app to use it or for your app to use.
Related
I just need to put a camera inside one of the three fragments of my main activity, like ([f]-[f]-[C]), where () is my main activity, [] is a fragment, C is the camera and f are just a fragment (they are full screen swipable). I need to create a whole camera (coding , etc) just for it or it is possible to call android native camera app with intent to an fagment?
I need to create a whole camera (coding , etc) just for it
Yes, whether you write it yourself or use one from a library.
or it is possible to call android native camera app with intent to an fagment?
No, you cannot embed a third-party app in a fragment of your app.
If you need to take a picture, you can just use an intent to launch the system camera app. Doing so will make it a lot easier to code, but you won't be able to show a live preview, as you're actually handling control to the camera app through that intent.
Manually handling the entire camera lifecycle allows you to have control over the preview and show it real-time in your app. Also, if you need to have the live preview in your app, this is the way to go and can't be accomplished using just an Intent.
You might find the UltimateAndroidCameraGuide on GitHub very helpful for your problem, particularly the SimpleCameraIntentFragment and the NativeCameraFragment files in that repo.
You can use an Intent to launch the camara and it will launch the camara default app., just be careful to detect when your "C" fragment is displayed, here: How to determine when Fragment becomes visible in ViewPager
If you dont do that, android pre-caches fragment before showing it and your intent will fire.
On your activity use:
#Override public void onResume() {
super.onResume();
if(viewPager.getCurrentItem() == 2){
//Your code here. Executed when fragment is seen by user.
// create Intent to take a picture and return control to the calling application
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
// start the image capture Intent
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}
}
See for camera launch with intent options: http://developer.android.com/guide/topics/media/camera.html#intent-image
I got a problem similar to (How to take multiple photos before dismissing camera intent?)!
how ever he used the:
Intent intent = new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);
I need to use somewhat like this:
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
for(int i=0;i<2;i++){
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
// start the image capture Intent
startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}
since i need to take exactly 2 photos, preview it with the default check or x of using MediaStore.ACTION_IMAGE_CAPTURE(to remove the hassle of displaying it to an imageview, go back again to capture)
then only go back to the main activity, knowing the data that i had taken 2 photos/saved it.
however, when i used that for loop, it returned only the last image taken, and it resized 2 times( i have a code that resizes 25% of the original captured photo, so after the code executed, it resized to 6.25% of original(1/4 of 25%) before it returns to the main activity).
Can someone give me light what is happening and give me a solution? Thanks a lot in advance! :D
As much as possible, i want to use the built in camera app, since it has a lot of other functions readily available compared to having the hassle of building your own custom camera. Btw im using android jellybean. 4.1.1
Call your second startActivityForResult() from the onActivityResult() you get from your first startActivityForResult(). Bear in mind that startActivityForResult() is asynchronous -- the other activity is not started right away.
i am creating an application.
and use device default camera to take picture.
using this
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(intent, CAMERA_PICTURE);
in onActivityResult() method i call again above code and take picture again.
but i want to take multiple pictures at a time. is there any way to take picture automatically when camera is called by intent (not by creating custom camera activity).
By sending intent you just say to existing camera application that it start and allow user to take picture - you are completely on the mercy of this application. Some of them may contain some undocumented parameters allowing you to snap picture automcatically.
http://developer.android.com/guide/topics/media/camera.html#intent-image
If you like to have control, you shall code camera application yourself.
I suppose you have to write your own custom camera, as there is no extra in MediaStore class that would allow taking another picutre.
I've an application that opens activity camera with the following code:
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/" + image)));
activity.startActivityForResult(intent, CAMERA_ACTIVITY_OK);
The problem is that the camera application, after some "snapshots", returns the following error:
Activity Camera (in application Camera) is not responding.
After that, the camera application doesn't works anymore.
This problem happens only with Android 2.3 version
Could you help me please?
Thanks
Snapshot"s"? As in more than one? That intent should only produce one shot, or the user can cancel the shot (producing no image). Are you calling the intent multiple times? If so, make sure the target image file (EXTRA_OUTPUT) is different each time. I probably can't help you without seeing more of your code or the error log.
BTW: Using the Camera app with Intents is now covered in the Android Developer documentation:
http://developer.android.com/guide/topics/media/camera.html#intents
I am starting the default camera app on the android to get a picture in my app using the following code:
//create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION,"Image capture by camera");
//imageUri is the current activity attribute, define and save it for later usage (also in onSaveInstanceState)
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
//create new Intent
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, actionCode);
and catch the picture in an onActivityResult method.
Often, this will work just fine and the device will take the picture and return it to the app, but sometimes after finishing with the camera app(by saving the image or hitting cancel) it will start the camera app a second time. How can I prevent the app from opening twice?
EDIT: Thanks to Krylez's comments I was able to put a solution in place.
I was already using a static class to hold the image from the camera so that it could be accessed by me tabbed Activity so I also put a boolean in there. Now, before I start the Activity to handle the camera I set that boolean to true, then after checking it I set it to false so that if the onCreate method is called again it will not load the camera a second time.
Thanks to Krylez's comments I was able to put a solution in place.
I was already using a static class to hold the image from the camera so that it could be accessed by me tabbed Activity so I also put a boolean in there. Now, before I start the Activity to handle the camera I set that boolean to true, then after checking it I set it to false so that if the onCreate method is called again it will not load the camera a second time.
I was able to solve this issue by using same boolean technique but by shared preferences, storing yes or no in preferences and wraping around new intent.
String val=sharedPref.getString(...);
if(val.equals("true"))
{ launch new intent
sharedPrefEditor.putstring("..","false");
sharedPrefEditor.commit();
}
it solved the problem and camera wil not run twice.
Thanks.