问题：
[fulinux@ubuntu rk3288⑷.4.x]$ mmm frameworks/base
============================================PLATFORM_VERSION_CODENAME=RELPLATFORM_VERSION=4.4.4TARGET_PRODUCT=rk3288TARGET_BUILD_VARIANT=engTARGET_BUILD_TYPE=releaseTARGET_BUILD_APPS=TARGET_ARCH=armTARGET_ARCH_VARIANT=armv7-a-neonTARGET_CPU_VARIANT=cortex-a15HOST_ARCH=x86HOST_OS=linuxHOST_OS_EXTRA=Linux⑶.13.0⑵4-generic-x86_64-with-Ubuntu⑴4.04-trustyHOST_BUILD_TYPE=releaseBUILD_ID=KTU84QOUT_DIR=out============================================make: Entering directory `/home/fulinux/rk3288⑷.4.x'target Java: framework-base (out/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/classes)javac: target release 1.5 conflicts with default source release 1.7make: *** [out/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/classes-full-debug.jar] Error 41make: Leaving directory `/home/fulinux/rk3288⑷.4.x'
方法：
原来是由于我使用了openjdk，换成sun jdk就能够了。依照下面的方法安装：
http://www.cnblogs.com/hitwtx/archive/2011/12/06/2277830.html
我的build.sh文件内容以下：
#!/bin/bash
export JAVA_HOME=/usr/lib/jvm/jdk1.6.0_45
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
. build/envsetup.sh
source build.sh文件便可。