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Added the Android project and lots of info to README.android
author Sam Lantinga <slouken@libsdl.org>
date Thu, 06 Jan 2011 17:12:31 -0800
parents 6c645018741e
children f74a3f94c408
rev   line source
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1 ================================================================================
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2 Simple DirectMedia Layer for Android
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3 ================================================================================
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4
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5 Requirements:
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6
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7 Android SDK
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8 http://developer.android.com/sdk/index.html
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9
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10 Android NDK r4 or later
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11 http://developer.android.com/sdk/ndk/index.html
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13 ================================================================================
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14 How the port works
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15 ================================================================================
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16
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17 - Android applications are Java-based, optionally with parts written in C
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18 - As SDL apps are C-based, we use a small Java shim that uses JNI to talk to
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19 the SDL library
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20 - This means that your application C code must be placed inside an android
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21 Java project, along with some C support code that communicates with Java
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22 - This eventually produces a standard Android .apk package
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23
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24
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25 ================================================================================
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26 Building an app
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27 ================================================================================
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28
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29 Instructions:
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30 1. Copy the android-project directory wherever you want to keep your projects and rename it to the name of your project.
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31 2. Move this SDL directory into the <project>/jni directory
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32 3. Place your application source files in the <project>/jni/src directory
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33 4. Edit <project>/jni/src/Android.mk to include your source files
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34 5. Run 'ndk-build' (a script provided by the NDK). This compiles the C source
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35
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36 If you want to use the Eclipse IDE, skip to the Eclipse section below.
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37
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38 6. Edit <project>/local.properties to point to the Android SDK directory
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39 7. Run 'ant debug' in android/project. This compiles the .java and eventually
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40 creates a .apk with the native code embedded
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41 8. 'ant install' will push the apk to the device or emulator (if connected)
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42
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43 Here's an explanation of the files in the Android project, so you can customize them:
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44
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45 android-project/
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46 AndroidManifest.xml - package manifest, do not modify
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47 build.properties - empty
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48 build.xml - build description file, used by ant
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49 default.properties - holds the ABI for the application, currently android-4 which corresponds to the Android 1.6 system image
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50 local.properties - holds the SDK path, you should change this to the path to your SDK
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51 jni/ - directory holding native code and Android.mk
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52 jni/Android.mk - Android makefile that includes all subdirectories
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53 jni/SDL/ - directory holding the SDL library files
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54 jni/SDL/Android.mk - Android makefile for creating the SDL shared library
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55 jni/src/ - directory holding your application source
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56 jni/src/Android.mk - Android makefile that you should customize to include your source code and any library references
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57 res/ - directory holding resources for your application
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58 res/drawable-* - directories holding icons for different phone hardware
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59 res/layout/main.xml - place holder for the main screen layout, overridden by the SDL video output
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60 res/values/strings.xml - strings used in your application, including the application name shown on the phone.
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61 src/org/libsdl/app/SDLActivity.java - the Java class handling the initialization and binding to SDL. Be very careful changing this, as the SDL library relies on this implementation.
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62
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63
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64 ================================================================================
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65 Additional documentation
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66 ================================================================================
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67
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68 The documentation in the NDK docs directory is very helpful in understanding the build process and how to work with native code on the Android platform.
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69
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70 The best place to start is with docs/OVERVIEW.TXT
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71
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73 ================================================================================
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74 Using Eclipse
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75 ================================================================================
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76
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77 First make sure that you've installed Eclipse and the Android extensions as described here:
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78 http://developer.android.com/sdk/eclipse-adt.html
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79
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80 Once you've copied the SDL android project and customized it, you can create an Eclipse project from it:
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81 * File -> New -> Other
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82 * Select the Android -> Android Project wizard and click Next
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83 * Enter the name you'd like your project to have
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84 * Select "Create project from existing source" and browse for your project directory
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85 * Make sure the Build Target is set to Android 1.6
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86 * Click Finish
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89 ================================================================================
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90 Loading files and resources
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91 ================================================================================
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93 NEED CONTENT
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96 ================================================================================
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97 Troubleshooting
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98 ================================================================================
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99
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100 You can create and run an emulator from the Eclipse IDE:
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101 * Window -> Android SDK and AVD Manager
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102
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103 You can see if adb can see any devices with the following command:
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104 adb devices
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105
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106 You can see the output of log messages on the default device with:
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107 adb logcat
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108
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109 You can push files to the device with:
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110 adb push local_file remote_path_and_file
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111
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112 You can push files to the SD Card at /sdcard, for example:
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113 adb push moose.dat /sdcard/moose.dat
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114
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116 ================================================================================
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117 Known issues
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118 ================================================================================
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119
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120 - SDL audio (although it's mostly written, just not working properly yet)
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121 - TODO. I'm sure there's a bunch more stuff I haven't thought of