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

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By Nizamettin Gok, Nitin Khanna

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

how one can create apps that experience entry to local APIs, reminiscent of place, vibrator, sensors, and the digital camera, utilizing a JavaScript/Java bridge—and decide upon the language that offers you larger functionality for every activity. in case you have adventure with HTML5 and JavaScript, you’ll speedy realize why hybrid app improvement is the wave of the future.
• arrange a improvement setting with HTML, CSS, and JavaScript instruments
• Create your first hybrid Android venture, utilizing Eclipse IDE
• Use the WebView keep an eye on to host your hybrid software
• discover hybrid software structure, together with JavaScript/Java communique
• construct single-page functions, utilizing JavaScript libraries akin to spine and Underscore
• Get optimization advice and beneficial snippets for CSS, DOM, and JavaScript
• Distribute your program to Google Play and the Amazon Appstore

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

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A paused activity is retained by the OS and kept in memory for the longest duration, unless the OS is running critically low on memory. Activities often enter a paused state when anther partially visible activity is displayed on top of an existing Activity | 49 activity. A paused activity is still associated with a window manager instance and can update the UI based on timer events. Stopped An activity is said to be stopped when it is completely obscured and sent to the background. It is no longer associated with the window manager.

Xml). In this file, you need to specify the paths to the signing key and the alias. password=MyPassword Signing an application in Android associates it with a developer, which can then be used to ascertain valid updates and remove applications from the app store. Understanding the Android Build Process The build process is almost similar for Eclipse and command-line builds. Unless you are customizing the build process, they are one and the same. The Android build system compiles your source code along with resources, then packages them into a ZIPcompatible archive format.

The default behavior of Android is to recreate the activity in this scenario. However, there may be times when you wish to manage configuration changes as part of your app. You can do this by specifying a list of configuration parameters in the value of this attribute. For all the parameters specified in this list, Android will pass on the information to the activity itself, by calling the onConfigurationChanged() meth‐ od. You may override this method to perform application-specific logic. An example for this tag is as follows: android:configChanges = "orientation|keyboardHidden|keyboard|screenSize|locale" In this sample, the activity will be notified of a configuration change every time the device orientation or language changes.

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