Dx file di classe non supportata versione 52.0 ... durante l'analisi com/es/test1/BuildConfig.class

Question

sto ottenendo i seguenti errori quando si tenta di costruire un progetto con JDK 1.8 e eclissare neon:

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 

[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/BuildConfig.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/MainActivity.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$attr.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$dimen.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$id.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$layout.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$menu.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$mipmap.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$string.class 

[2016-07-03 02:40:59 - Test1] Dx 
PARSE ERROR: 
[2016-07-03 02:40:59 - Test1] Dx unsupported class file version 52.0 
...while parsing com/example/test1/R$style.class 

[2016-07-03 02:40:59 - Test1] Dx 11 errors; aborting 
[2016-07-03 02:40:59 - Test1] Conversion to Dalvik format failed with error 1 

Quali impostazioni del progetto devo modificare per correggerle?

Answer 1

Si deve dire al compilatore Java di produrre file di classe compatibili con Java 7, perché Android (dex) non supporta java 8 al momento.

Se si desidera utilizzare lambda nelle vostre fonti, è possibile utilizzare retrolambda (https://github.com/evant/gradle-retrolambda) o il nuovo compilatore Jack (https://developer.android.com/preview/j8-jack.html)