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【拍照图片处理】Attempt to invoke virtual method 'boolean android.grap...
在做图片识别App的时候，选择相册图片没有问题，拍照后图片就报错：
Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object reference
图片大致的处理流程是...
A valid provisioning profile for this executable was not found for debug mode
I am getting this error while I am trying to debug my app on device.
42 Answers
42
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adb update a non-market apk?
... the database and stored preferences. If you uninstall/re-install both the app database and preferences is deleted. What exactly are you trying to update about the app that -r option does not help you with ?
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How can I open a URL in Android's web browser from my application?
...to open an URL from code in the built-in web browser rather than within my application?
36 Answers
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How do you switch pages in Xamarin.Forms?
...
In the App class you can set the MainPage to a Navigation Page and set the root page to your ContentPage:
public App ()
{
// The root page of your application
MainPage = new NavigationPage( new FirstContentPage() );
}
T...
Embedding Python in an iPhone app
So it's a new millennium; Apple has waved their hand; it's now legal to include a Python interpreter in an iPhone (App Store) app.
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What is a provisioning profile used for when developing iPhone applications?
...e of a provisioning profile and why is it needed when developing an iPhone application? If I don't have a provisioning profile, what happens?
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Correct way to quit a Qt program?
...ng a data file, and discovered file corruption, and user need to quit this app or re-initiate data file?
5 Answers
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How do I create a simple 'Hello World' module in Magento?
...le/frontName controller, and then the MVC controller.
Fourth, the Magento application itself is built using the same module system you'll be using, so poking around the core code is a useful learning tactic. Also, a lot of what you'll be doing with Magento is overriding existing classes. What I'm c...
Heroku/GoDaddy: send naked domain to www [closed]
...ou do this then all traffic to yourdomain.com will be routed to the Heroku app CNAME (which is the better approach).
One note, however, if you are on the Cedar stack then don't use proxy.heroku.com for the host of your www CNAME. Instead use your-app-name.herokuapp.com. These details are covered he...