Android Development Tools for Eclipse by Sanjay Shah, Khirulnizam Abd Rahman

By Sanjay Shah, Khirulnizam Abd Rahman

Android improvement instruments for Eclipse is a step by step advisor that offers you with hands-on, sensible, and to the purpose dialogue and steps for utilizing Eclipse instruments for constructing, debugging, and signing Android functions for distribution. It additionally teaches you to include ads to monetize your purposes. each thought and its utilization has been verified during this publication by means of enforcing them through actual global purposes.

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Without it, the developer cannot directly transmit the APK file to an Android device/emulator: The LogCat (tracedump of all device/emulator activities) Dalvik Debug Monitor Server (DDMS) DDMS is a must have tool to view the emulator/device activities. To access DDMS in the Eclipse, navigate to Windows | Open Perspective | Other and then choose DDMS. By default it is available in the Android SDK (it's inside the folder android-sdk/tools by the file ddms). From this perspective the following aspects are available: • Devices: The list of the devices and AVDs that are connected to ADB • Emulator Control: It helps to carry out device functions • LogCat: It views real time system log messages • Threads: It gives an idea of currently running threads within a VM • Heap: It shows heap usage by application • Allocation Tracker: It provides information on memory allocation of objects • File Explorer: It explores the device file system [ 34 ] Chapter 2 The following image shows important aspects of DDMS: Dalvik Debug Monitor Server (DDMS) SDK manager SDK Manager is the tool to update Android SDK and manage the download of Android OS system images, documentations, and APIs.

Press Ctrl + S to save the changes and to make sure the changes appear in the XML file: Changing the caption of a TextView [ 48 ] Chapter 3 The next widget to add is the EditText with Id txtName, associate label as Your name: to accept user input, as shown in the following screenshot: Adding an EditText Add another widget, button, specify ID btnDisplay and associate label as D isplay Name, as shown, and expand it horizontally across the screen. You may use the resize feature by clicking and dragging the bluish resize mark on the edge of the widget: Adding a Button [ 49 ] Creating a New Android Project The XML layout code editor The code editor is an alternative to change the layout properties.

LogCat is useful to trace any activity happening inside the device or emulator. The following screenshot shows the window to list all code problems, such as warnings or syntax errors: [ 32 ] Chapter 2 Problems warnings or code syntax errors A sample of console messages from the ADB is listed in the following screenshot. println() to split out message and objects' values; which are shown in the LogCat view, however it is advisable to use Log class for this purpose, reason being we can filter, print different colors and define log types.

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