Download 20 Recipes for Programming PhoneGap: Cross-Platform Mobile by Jamie Munro PDF

By Jamie Munro

Gain hands-on adventure with the fantastic PhoneGap library, utilizing the sensible recipes during this convenient consultant. With those ideas, you could let your cellular internet apps to engage with device-specific beneficial properties akin to the accelerometer, GPS, digital camera, and deal with publication. find out how to use your wisdom of HTML, CSS, and JavaScript to construct complete cellular apps for iOS, Android, and several systems with no rewriting apps within the local platform language. each one recipe comprises pattern code you should use on your undertaking instantly, in addition to a dialogue of why the answer works.
* upload performance that’s on hand simply on a undeniable machine or platform
* Retrieve the device’s present GPS position and position a marker on a map
* Create and retailer a brand new touch or edit an current touch within the deal with publication
* Take images with the digital camera or decide on one of many user’s present photographs
* add a dossier from the neighborhood machine to an exterior server
* let the machine to list audio or video via your app
* let your software to save lots of records in the neighborhood

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It is also passing the current URL to the updated init function. This will be used for implementing the callback function. The init function has been updated to accept this new url parameter. onload event, the code checks to see whether it is a string. href is used and stored in the currentUrl global variable. Then, if the variable isPhoneGapReady is already set and true, there is no need to add the listener and wait, so it just calls the onDeviceReady function. Executing a Callback Function Once the Device Is Ready | 17 The onDeviceReady function has been slightly reorganized and some of the previous work has been moved into new functions for later expansion, including the newly added executeCallback function.

If there was an error detecting the acceleration, the stopBall function is called. clearWatch function. An alert dialog box appears as well to inform the user of the error. This code is an excellent start to creating a labyrinthine game using the device’s motion sensors. This feature might not work correctly in all simulators and an actual device may be needed. Using the Accelerometer to Detect Motion | 27 Displaying Table-View Data Problem You have a hierarchical list of items that you wish to display in a table, cascading so that when the user selects the one item, the table navigates to another filtered list of items, until the user receives the specific detail view.

It will then perform a calculation and call the drawImage function, which will move the ball on the screen. First, drawImage clears the canvas’s screen; then it draws the image of the ball on screen in the new x, y coordinates that were calculated in the moveBall function. drawImage function, you can read this article I wrote when experimenting with the tag to create a walking animation using an image sprite. If there was an error detecting the acceleration, the stopBall function is called. clearWatch function.

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