JavaRanch Home    
 
This page:         last edited 04 November 2014         What's Changed?         Edit

Android FAQ   

This is the FAQ for the Android forum. It's editable by everyone, so feel free to add content to it.

  • What Java API is supported by Android? How does it differ from JME?
  • Where can I get an SDK? What platforms does it support?
    • The latest version of the SDK is for Android versions up to 4.4, and it's available for Windows, OS X and Linux here.
  • Do I need to buy hardware if I want to start writing applications that run on Android?
    • You can start writing applications even if you don?t have hardware to run them on. The Android SDK comes with an emulator and all tools necessary for application development and deployment.
    • Other options include the freely available Motodev Studio for Android IDE from Motorola and Google's Android Studio which is based on IntelliJ.
  • Which hardware devices support Android?
  • What is Dalvik? How is it different from JVM?
    • Dalvik is a register based virtual machine optimized to run on a slow CPU,with relatively little RAM and on an OS without swap space. WikiPedia:Dalvik_virtual_machine
  • What are the different Media formats supported on Android?
  • Where can I publish my Android applications?
  • How can I get insight into how people are using my app?
  • I'd like to display ads in my app without having to negotiate it all by myself. What are my options?
  • What support does Android or Dalvik VM provide for running native C code?
    • The NDK (Native Development Kit) gives developers the ability to call into native code from Android applications. There is a Google group for NDK-related discussions. At present, Android supports libc, libm, JNI interface headers, libz, liblog, OpenGL ES 1.1 and OpenGL ES 2.0, libjnigraphics, a minimal set of headers for C++ support, OpenSL ES native audio libraries and Android native application APIs.
  • How can I view PDFs and Office documents?
  • Which Android versions are being used out in the field?
  • Is Android code compiled to a .class file?
    • The Java bytecode of a compiled class is converted into Dalvik executables or (.dex) files, using the "dx" tool bundled with the SDK . The application is packaged into .apk file which are zipped .dex files. The Dalvik virtual machine runs Dalvik executables in the apk file. Details of .dex file format can be found here
  • I want to write Android Applications too but dont know where to start?
  • Do Android projects have deployment descriptors?
  • My Application throws an Exception, where is the Stack Trace dumped?
    • Exceptions are written to a log file, named Logcat in the emulator. You can obtain a dump by executing the adb logcat command. To write log messages from your application, use the static methods of JavaDoc:android.util.Log class(Log.v(), Log.d(), Log.i(), etc.). If you are using Eclipse with ADT plugin, you can open "Logcat" view to see the logged messages.
  • What functionality of the actual device can the emulator emulate?
    • For Emulator How-Tos and limitations, read this
  • How can I send email from an Android application?
  • How can I use JAXB on Android?
  • What options for storing data do I have?
  • What 3rd party libraries should I check out?
  • How do I get the Android source code?

Reference material

Books

Other

Other Android variants



CategoryFaq JavaMicroEditionFaq

JavaRanchContact us — Copyright © 1998-2014 Paul Wheaton