+++ /dev/null
-libusb for Android
-==================
-
-Building:
----------
-
-To build libusb for Android do the following:
-
- 1. Download the latest NDK from:
- http://developer.android.com/tools/sdk/ndk/index.html
-
- 2. Extract the NDK.
-
- 3. Open a shell and make sure there exist an NDK global variable
- set to the directory where you extracted the NDK.
-
- 4. Change directory to libusb's "android/jni"
-
- 5. Run "$NDK/ndk-build".
-
-The libusb library, examples and tests can then be found in:
- "android/libs/$ARCH"
-
-Where $ARCH is one of:
- armeabi
- armeabi-v7a
- x86
-
-
-Installing:
------------
-
-If you wish to use libusb from native code in own Android application
-then you should add the following line to your Android.mk file:
-
- include $(PATH_TO_LIBUSB_SRC)/android/jni/libusb.mk
-
-You will then need to add the following lines to the build
-configuration for each native binary which uses libusb:
-
- LOCAL_C_INCLUDES += $(LIBUSB_ROOT_ABS)
- LOCAL_SHARED_LIBRARIES += libusb1.0
-
-The Android build system will then correctly include libusb in the
-application package (APK) file, provided ndk-build is invoked before
-the package is built.
-
-
-For a rooted device it is possible to install libusb into the system
-image of a running device:
-
- 1. Enable ADB on the device.
-
- 2. Connect the device to a machine running ADB.
-
- 3. Execute the following commands on the machine
- running ADB:
-
- # Make the system partition writable
- adb shell su -c "mount -o remount,rw /system"
-
- # Install libusb
- adb push obj/local/armeabi/libusb1.0.so /sdcard/
- adb shell su -c "cat > /system/lib/libusb1.0.so < /sdcard/libusb1.0.so"
- adb shell rm /system/lib/libusb1.0.so
-
- # Install the samples and tests
- for B in listdevs fxload xusb sam3u_benchmark hotplugtest stress
- do
- adb push "obj/local/armeabi/$B" /sdcard/
- adb shell su -c "cat > /system/bin/$B < /sdcard/$B"
- adb shell su -c "chmod 0755 /system/bin/$B"
- adb shell rm "/sdcard/$B"
- done
-
- # Make the system partition read only again
- adb shell su -c "mount -o remount,ro /system"
-
- # Run listdevs to
- adb shell su -c "listdevs"
-
- 4. If your device only has a single OTG port then ADB can generally
- be switched to using Wifi with the following commands when connected
- via USB:
-
- adb shell netcfg
- # Note the wifi IP address of the phone
- adb tcpip 5555
- # Use the IP address from netcfg
- adb connect 192.168.1.123:5555
-
-Runtime Permissions:
---------------------
-
-The default system configuration on most Android device will not allow
-access to USB devices. There are several options for changing this.
-
-If you have control of the system image then you can modify the
-ueventd.rc used in the image to change the permissions on
-/dev/bus/usb/*/*. If using this approach then it is advisable to
-create a new Android permission to protect access to these files.
-It is not advisable to give all applications read and write permissions
-to these files.
-
-For rooted devices the code using libusb could be executed as root
-using the "su" command. An alternative would be to use the "su" command
-to change the permissions on the appropriate /dev/bus/usb/ files.
-
-Users have reported success in using android.hardware.usb.UsbManager
-to request permission to use the UsbDevice and then opening the
-device. The difficulties in this method is that there is no guarantee
-that it will continue to work in the future Android versions, it
-requires invoking Java APIs and running code to match each
-android.hardware.usb.UsbDevice to a libusb_device.
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