Cannot run program "/usr/local/android-sdk-linux/build-tools/23.0.2/aapt": error=2, No such file or

问题：execute failed: java.io.ioexception: cannot run program “/usr/local/android-sdk-linux/build-tools/23.0.2/aapt”: error=2, no such file or directory

原因：在64位linux下打包成apk时缺少x86下c++语言库。
解决方案：

sudo apt-get install libncurses5:i386 \
                   libstdc++6:i386 \
                   zlib1g:i386

最终完美解决

executing tasks: [:app:assemblearm7debug]

configuration on demand is an incubating feature.
incremental java compilation is an incubating feature.
:app:prebuild up-to-date
:app:prearm7debugbuild up-to-date
:app:checkarm7debugmanifest
:app:preparearm7debugdependencies
:app:compilearm7debugaidl up-to-date
:app:compilearm7debugrenderscript up-to-date
:app:generatearm7debugbuildconfig up-to-date
:app:generatearm7debugresvalues up-to-date
:app:generatearm7debugresources up-to-date
:app:mergearm7debugresources
:app:processarm7debugmanifest
:app:processarm7debugresources
:app:generatearm7debugsources
:app:incrementalarm7debugjavacompilationsafeguard
:app:compilearm7debugjavawithjavac
:app:compilearm7debugjavawithjavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
:app:generatejsonmodelarm7debug
:app:externalnativebuildarm7debug
:app:compilearm7debugsources
:app:mergearm7debugshaders
:app:compilearm7debugshaders
:app:generatearm7debugassets
:app:mergearm7debugassets
:app:transformclasseswithdexforarm7debug

running dex as a separate process.

to run dex in process, the gradle daemon needs a larger heap.
it currently has 1024 mb.
for faster builds, increase the maximum heap size for the gradle daemon to at least 1536 mb.
to do this set org.gradle.jvmargs=-xmx1536m in the project gradle.properties.
for more information see https://docs.gradle.org/current/userguide/build_environment.html

:app:mergearm7debugjnilibfolders
:app:transformnative_libswithmergejnilibsforarm7debug
:app:transformnative_libswithstripdebugsymbolforarm7debug
:app:processarm7debugjavares up-to-date
:app:transformresourceswithmergejavaresforarm7debug
:app:validatesigningarm7debug
:app:packagearm7debug
:app:assemblearm7debug

build successful

total time: 17.095 secs