一、提前安装软件
1.安装openjdk
1) 编译的时候使用的是openjdk,跟我们平时使用的jdk并不一样，可以到 http://openjdk.java.net/ 下载安装，也可以通过下面的指令安装。
sudo apt-get update
sudo apt-get install openjdk-8-jre
sudo apt-get install openjdk-8-jdk
2) 配置jdk环境变量
目前ubuntu中由三四种配置环境变量的方式，今天只说通过profile文件来配置。
sudo vim /etc/profile通过上面的指令打开/etc/profile文件。并且加上下面的内容，路径要根据自己系统的jdk位置做修改。
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
3) 当有多套代码需要不同的jdk编译是，可以在指令窗口直接输入下面的命令进行切换，注意，切换只对当前终端有效。（记得路径要根据自己jdk路径修改）
export JAVA_HOME=/usr/lib/jvm/jdk1.6;export PATH=/usr/lib/jvm/jdk1.6/bin:$PATH2.安装其他，每个是干嘛的，感兴趣的自己去了解。
sudo apt-get install m4
sudo apt-get install g++-multilib gcc-multilib lib32ncurses5-dev lib32readline6-dev lib32z1-dev
sudo apt-get install flex
sudo apt-get install curl
sudo apt-get install bison
sudo apt-get update
3.如果android 6.0~8.1的，还的到源码根目录配置jack-admin
1）查看病并且开启jack服务
./prebuilts/sdk/tools/jack-admin list-server
prebuilts/sdk/tools/jack-admin start -server
prebuilts/sdk/tools/jack-admin stop -server2）如果命令不存在。则需要安装，如下命令；
cd prebuilts/sdk/tools/
./jack-admin install-server jack-launcher.jar jack-server-4.8.ALPHA.jar安装完成后，重新开启。
二、下载源码，由于我并没有使用repo,而是直接在百度云下载下来，通过下面的命令进行解压源码。
7za x android-7.1.1_r1.7z -r -o./三、开始编译
1）到源码根目录source源代码
source build/envsetup.sh 2）选择要运行的设备
lunch3）打开线程，编译代码。
make -j8四、正常情况编译可能会出现很多问题，下面列举几个比较常见的。
1.问题一
[ 1% 601/35623] Lex: aidl <= system/tools/aidl/aidl_language_l.ll
FAILED: /bin/bash -c "prebuilts/misc/linux-x86/flex/flex-2.5.39 -oout/host/linux-x86/obj/STATIC_LIBRARIES/libaidl-common_intermediates/aidl_language_l.cpp system/tools/aidl/aidl_language_l.ll"
flex-2.5.39: loadlocale.c:130: _nl_intern_locale_data: Assertion `cnt < (sizeof (_nl_value_type_LC_TIME) / sizeof (_nl_value_type_LC_TIME[0]))' failed.
Aborted (core dumped)
[ 1% 601/35623] host Java: guavalib (out/host/common/obj/JAVA_LIBRARIES/guavalib_intermediates/classes)
warning: [options] bootstrap class path not set in conjunction with -source 1.7
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
[ 1% 601/35623] target Java: core-all (out/target/common/obj/JAVA_LIBRARIES/core-all_intermediates/classes)
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
ninja: build stopped: subcommand failed.
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1解决方法：
检查jack是否已经安装并启动。
./prebuilts/sdk/tools/jack-admin list-server
prebuilts/sdk/tools/jack-admin start -server
prebuilts/sdk/tools/jack-admin stop -server
cd prebuilts/sdk/tools/
./jack-admin install-server jack-launcher.jar jack-server-4.8.ALPHA.jar换不行的话，运行西面的
export LC_ALL=C2.问题二
[ 34% 17174/49182] Building with Jack: out/target/common/obj/JAVA_LIBRARIES/core-all_intermediates/with-local/classes.dex
FAILED: /bin/bash out/target/common/obj/JAVA_LIBRARIES/core-all_intermediates/with-local/classes.dex.rsp
Out of memory error (version 1.2-rc4 'Carnac' (298900 f95d7bdecfceb327f9d201a1348397ed8a843843 by [email protected])).
Java heap space.
Try increasing heap size with java option '-Xmx<size>'.
Warning: This may have produced partial or corrupted output.
[ 34% 17174/49182] Building with Jack: out/target/common/obj/JAVA_LIBRARIES/libprotobuf-java-micro_intermediates/classes.jack
ninja: build stopped: subcommand failed.
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1
#### make failed to build some targets (01:28:46 (hh:mm:ss)) ####解决方案：
对prebuilts/sdk/tools/jack-admin文件进行修改：
1.在jack-admin找到如下语句：
JACK_SERVER_COMMAND="java -XX:MaxJavaStackTraceDepth=-1 -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS -cp $LAUNCHER_JAR $LAUNCHER_NAME"修改为：
JACK_SERVER_COMMAND="java -XX:MaxJavaStackTraceDepth=-1 -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS -Xmx4096m -cp $LAUNCHER_JAR $LAUNCHER_NAME"在-cp前添加了-Xmx4096m参数，重启jack-admin服务：
./prebuilts/sdk/tools/jack-admin stop-server
./prebuilts/sdk/tools/jack-admin start-server3.问题三：
[ 38% 18985/49182] target thumb C++: libskia_static_32 <= external/skia/src/gpu/gl/builders/GrGLSLPrettyPrint.cppninja: fatal: fork: Cannot allocate memory
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1解决方法：
可能一：线程数不够
1）查看当前最大线程数
sysctl kernel.pid_max2）重新设定线程上限为1000000
echo 1000000 > /proc/sys/kernel/pid_max3）将新的设定写入配置文件
echo "kernel.pid_max=1000000 " >> /etc/sysctl.conf4）更新状态
sysctl –p可能二：Swap缓存不够
fuge@fuge2008:/newdisk/android-7.1.1_r1$ free -m
total used free shared buff/cache available
Mem: 5926 5188 259 85 478 484
Swap: 7167 1594 55731)停止交换分区
swapoff -a2）给Swap增加5G内存
dd if=/dev/zero of=/home/swapfile bs=1M count=51203）设置交换区文件
mkswap /home/swapfile 4）立即启用交换区文件
swapon /home/swapfile5）到/etc/fstab文件配合如下，即配置开机即自动配置Swap。
/home/swapfile swap swap defaults 0 0
五、编译成功。
[ 99% 49079/49182] host Java: android-icu4j-tests-host (out/host/common/obj/JAVA_LIBRARIES/android-icu4j-tests-host_intermediates/classes)
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
[100% 49182/49182] host Executable: primitives_tests_32 (out/host/linux-x86/obj32/EXECUTABLES/primitives_tests_intermediates/primitives_tests32)
#### make completed successfully (03:53:27 (hh:mm:ss)) ####