Building Hybrid Android Apps with Java and JavaScript: by Nizamettin Gok, Nitin Khanna

By Nizamettin Gok, Nitin Khanna

Construct HTML5-based hybrid functions for Android with a mixture of local Java and JavaScript elements, with no utilizing third-party libraries and wrappers corresponding to PhoneGap or Titanium. This concise, hands-on publication takes you thru the total procedure, from developing your improvement surroundings to deploying your product to an app store.

Learn the best way to create apps that experience entry to local APIs, comparable to situation, vibrator, sensors, and the digital camera, utilizing a JavaScript/Java bridge—and select the language that provides you higher functionality for every job. when you've got adventure with HTML5 and JavaScript, you’ll quick realize why hybrid app improvement is the wave of the future.

* organize a improvement surroundings with HTML, CSS, and JavaScript tools
* Create your first hybrid Android venture, utilizing Eclipse IDE
* Use the WebView regulate to host your hybrid application
* discover hybrid program structure, together with JavaScript/Java communication
* construct single-page purposes, utilizing JavaScript libraries resembling spine and Underscore
* Get optimization information and worthwhile snippets for CSS, DOM, and JavaScript
* Distribute your program to Google Play and the Amazon Appstore

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Extra info for Building Hybrid Android Apps with Java and JavaScript: Applying Native Device APIs

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For this reason, it’s best to avoid placing "use strict" in the global scope. info // Good function doSomething() { "use strict"; } // code If you want strict mode to apply to multiple functions without needing to write "use strict" multiple times, use immediate function invocation: // Good (function() { "use strict"; function doSomething() { // code } function doSomethingElse() { // code } })(); In this example, doSomething() and doSomethingElse() both run in strict mode, because they are contained in an immediately invoked function with "use strict" specified.

Therefore, a popular style is to have all variables declared at the top of a function instead of scattered throughout. In short, you end up writing code similar to the manner in which the JavaScript engine will interpret it. My recommendation is to have your local variables defined as the first statements in a function. length; i < len; i++) { doSomething(items[i]); } The Dojo Style Guide allows combining var statements only when the variables are related to one another. My personal preference is to combine all var statements with one initialized variable per line.

Mix() method: // Good if (mode) { /* * In mode 2 (prototype to prototype and object to object), we recurse * once to do the proto to proto mix. The object to object mix will be * handled later on. prototype, overwrite, whitelist, 0, merge); } /* * Depending on which mode is specified, we may be copying from or to * the prototypes of the supplier and receiver. */ from = mode === 1 || mode === 3 ? prototype : supplier; to = mode === 1 || mode === 4 ? prototype : receiver; /* * If either the supplier or receiver doesn't actually have a * prototype property, then we could end up with an undefined from * or to.

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