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Image, saved to sdcard, doesn't appear in Android's Gallery app

I save an image to the sdcard and it doesn't appear in the Gallery application until I pull off the sdcard and return it back. ...
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ImageView - have height match width?

...id:layout_width="wrap_content" android:layout_height="0dp" app:layout_constraintDimensionRatio="1:1" /> </android.support.constraint.ConstraintLayout> See here Deprecated: According to this post by Android Developers, all you need to do now is to wrap whatever you want ...
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Which websocket library to use with Node.js? [closed]

...you have no idea about what to use, are not in the mood for rewriting your application when you need to switch frameworks because of changing project requirements or need additional connection stability. Where to test: Firecamp is a GUI testing environment for SocketIO, WS and all major real-time...
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How to create local notifications?

How can I setup local notifications so that at the time I set, my app generates a notification/alert with a customized message? ...
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Prevent screen rotation on Android

... Please note this is just hiding a bug in your app, making it less likely for users to trip over it. But they still will. Any configuration change can cause your activity to restart. You really need to write your activity correctly to deal with the async task as it res...
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HTTP Error 503, the service is unavailable

...e user identity is outdated, especially if you've tried starting a stopped app pool and the next request again fails. In IIS, go to the Application Pools under the Server, then find the correct Application Pool for your web site, and click on it. On the Advanced Settings menu to the right, select ...
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What is two way binding?

...(say, by the user) are immediately reflected in the underlying model. When app data changes, so does the UI, and conversely. This is a very solid concept to build a web application on top of, because it makes the "Model" abstraction a safe, atomic data source to use everywhere within the applicatio...
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Why does my Spring Boot App always shutdown immediately after starting?

... Resolution: the app is not a webapp because it doesn't have an embedded container (e.g. Tomcat) on the classpath. Adding one fixed it. If you are using Maven, then add this in pom.xml: <dependency> <groupId>org.springframewo...
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha

...ected, so problem is definitely solved :) Update: you may have to contact Apple to get a "Renew"-button, or they removed it -- and the solution is to just download it and add it to the keychain, no need to renew. share ...
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Link vs compile vs controller

...ML vocabulary in a declarative fashion for building web components. The ng-app attribute is a directive, so is ng-controller and all of the ng- prefixed attributes. Directives can be attributes, tags or even class names, comments. How directives are born (compilation and instantiation) Compile: We...