ant jar error: Execute failed: java.io.IOException: Cannot run program...${aapt}": error=2, No such file or directory
Have you updated the Android SDK tools to 24.3.2? This seems to have caused the issue. Add following 4 lines to android-sdk-path/tools/ant/build.xml starting line 484 and hopefully it should solve.
<property name="aidl" location="${android.build.tools.dir}/aidl${exe}" /><property name="aapt" location="${android.build.tools.dir}/aapt${exe}" /><property name="dx" location="${android.build.tools.dir}/dx${bat}" /><property name="zipalign" location="${android.build.tools.dir}/zipalign${exe}" />