javac error: Source option 1.5 is no longer supported

[broesamle]

Good afternoon,
doing

[~/projets]$ cargo init --bin hellodroid_e
     Created binary (application) project
[~/projets]$ cd hellodroid_e
[~/projets/hellodroid_e]$ cargo apk

I get the following compile error:

-compile:
    [javac] Compiling 2 source files to /home/broe/projets/target/android-artifacts/build/bin/classes
    [javac] error: Source option 1.5 is no longer supported. Use 1.6 or later.
    [javac] error: Target option 1.5 is no longer supported. Use 1.6 or later.

NDK version: 14.1.3816874
SDK tools: 26.0.2
Android Studio: 2.3.2
Ubuntu: 16.04

Maybe the SDK/NDK and the included javac is too new and does not accept some of the glue code any more? (Not a java expert...)

(NOTE: I had to install manually some parts manually from tools_r25.2.5-linux in order to get the built process to work.)

[broesamle]

the full console output:

~/projets]$ cargo init --bin hellodroid_e
     Created binary (application) project
[~/projets]$ cd hellodroid_e
[~/projets/hellodroid_e]$ cargo apk
  Cargo-Apk: Compiling android_native_app_glue.c
  Cargo-Apk: Compiling injected-glue
  Cargo-Apk: Compiling injected-glue
  Cargo-Apk: Compiling glue_obj
  Cargo-Apk: Compiling crate
   Compiling hellodroid_e v0.1.0 (file:///home/broe/projets/hellodroid_e)
    Finished dev [unoptimized + debuginfo] target(s) in 0.37 secs
  Cargo-Apk: Invoking ant
Error executing ["ant", "debug"]
Status code 1
Stdout
--------------------
Buildfile: /home/broe/projets/hellodroid_e/target/android-artifacts/build/build.xml

-set-mode-check:

-set-debug-files:

-check-env:
 [checkenv] Android SDK Tools Revision 26.0.2
 [checkenv] Installed at /home/broe/Android/Sdk

-setup:
     [echo] Project Name: hellodroid_e
  [gettype] Project Type: Application

-set-debug-mode:

-debug-obfuscation-check:

-pre-build:

-build-setup:
[getbuildtools] Using latest Build Tools: 25.0.3
     [echo] Resolving Build Target for hellodroid_e...
[gettarget] Project Target:   Android 4.3.1
[gettarget] API level:        18
     [echo] ----------
     [echo] Creating output directories if needed...
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/res
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/res
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/rsObj
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/rsLibs
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/gen
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/classes
    [mkdir] Created dir: /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/dexedLibs
     [echo] ----------
     [echo] Resolving Dependencies for hellodroid_e...
[dependency] Library dependencies:
[dependency] No Libraries
[dependency] 
[dependency] ------------------
     [echo] ----------
     [echo] Building Libraries with 'debug'...
   [subant] No sub-builds to iterate on

-code-gen:
[mergemanifest] Merging AndroidManifest files into one.
[mergemanifest] Manifest merger disabled. Using project manifest only.
     [echo] Handling aidl files...
     [aidl] No AIDL files to compile.
     [echo] ----------
     [echo] Handling RenderScript files...
     [echo] ----------
     [echo] Handling Resources...
     [aapt] Generating resource IDs...
     [echo] ----------
     [echo] Handling BuildConfig class...
[buildconfig] Generating BuildConfig class.

-pre-compile:

-compile:
    [javac] Compiling 2 source files to /home/broe/projets/hellodroid_e/target/android-artifacts/build/bin/classes
    [javac] error: Source option 1.5 is no longer supported. Use 1.6 or later.
    [javac] error: Target option 1.5 is no longer supported. Use 1.6 or later.
Stderr
--------------------

BUILD FAILED
/home/broe/Android/Sdk/tools/ant/build.xml:716: The following error occurred while executing this line:
/home/broe/Android/Sdk/tools/ant/build.xml:730: Compile failed; see the compiler error output for details.

Total time: 0 seconds

[mb64]

Fixed by #223.