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Even if you can look at logging information, it may be awkward and difficult to parse. It s much easier to deal with detailed log files on the PC than it is on a handset. Therefore, consider including some error reporting capabilities within your app. For example, you might include a menu option that reads Send report to developer. If a user selects this item, the app will collect all the current logging information that it has collected, place it in an email, and send it to you. This way, if a user runs into a problem with their application, they can help you solve it by providing more insight into what the app is doing. Consider combining this approach with the Secret code strategy. You might not want to receive reports from thousands of curious users, but it s nice to have the option for cases where things have gone seriously wrong.

Each field in the contact form has some placeholder text in an HTML5 placeholder attribute. The name field has "your name", the email field has "your email", and so on.

No two people or organizations will settle on the exact same process for building and releasing their applications. You may encounter several other issues and ideas when preparing your builds.

Although different phones have different configurations, most have physical buttons for power and volume control. They also have Home, Menu, Back, and Search buttons, along with a trackball. Some phones also have a Camera button, a green Call button, and a red End Call button. Figure 2 1 is taken from the Android developer s kit, and while you ll never see a phone that looks like this, it shows you the possible physical buttons that could be on your phone.

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Note Placeholder values are also useful from an accessibility viewpoint. Checkpoint 10.4 of the Web Accessibility Initiative guidelines states, Until user agents handle empty controls correctly, include default, placeholding characters in edit boxes and text areas. [Priority 3]. For more on the Web Accessibility Initiative, see http://www.w3.org/WAI/.

Java ME developers often rely on obfuscators such as Proguard to optimize their code. Obfuscators have several effects. First, true to their name, they conceal the workings of an application by renaming classes, variables, and method names; therefore, even if someone decompiles an application, he will find it difficult to understand. More

importantly than the decompilation part, though, obfuscators also remove unused sections of code If an obfuscator determines that a method can never be called, or a class will never be instantiated, it will strip out the affected code For mobile platforms that have a limited amount of space available for applications, such savings can prove crucial As noted above, rapc includes an obfuscation stage that will strip out unused code In addition, because the COD file format is proprietary and unique to RIM devices, it cannot be reverse-engineered with the same ease that Java ME JAR files can We have previously seen that you can open a COD file in a hex editor to view program information, but, currently, no true decompiler exists for the COD format Because of these aspects, you can generally omit obfuscation from your build process.

Historically, some browsers have had problems recognizing empty form fields. This made keyboard navigation particularly difficult. Visitors were not able to tab to empty fields. Much like using <label> tags, this accessibility enhancement turns out to be useful for everyone. Even if users are not navigating by keyboard, it s still very handy for them to be able to see what they should be writing in each form field. There s one drawback to having placeholder values in the HTML5 placeholder attribute. When the user comes along with an older browser, the field will be blank (without a placeholder). You can ensure a placeholder appears by using JavaScript. This time, though, you won t be using methods and properties of the DOM Core. Instead, you ll be using one of the most useful objects in the HTML-DOM: the Form object.

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