Android studio appear lost of warning messages -

i facing warning messages during building process application in android studio.if know warning please me out.

i using following configuration developing:

android studio 2.2 , jre 1.8.0_76 , classpath 'com.android.tools.build:gradle:2.2.0'

 information:gradle tasks [:app:assembledebug] error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$10) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$11) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$2) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$3) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$4) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$5) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$6) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$7) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$8) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.beanmap$9) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.binaryheap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.boundedfifobuffer$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$10) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$11) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$12) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$2) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$3) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$4) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$5) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$6) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$7) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$8) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.doubleorderedmap$9) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.referencemap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.referencemap$2) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.referencemap$3) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.sequencedhashmap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.sequencedhashmap$2) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.sequencedhashmap$3) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.unboundedfifobuffer$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.buffer.boundedfifobuffer$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.buffer.prioritybuffer$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.buffer.unboundedfifobuffer$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.map.listorderedmap$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.collections.map.listorderedmap$2) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.lang.builder.reflectiontostringbuilder$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.lang.builder.tostringstyle$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.lang.enum.enum$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. error:warning: ignoring innerclasses attribute anonymous inner class error:(org.apache.commons.lang.enums.enum$1) doesn't come error:associated enclosingmethod attribute. class produced error:compiler did not target modern .class file format. recommended error:solution recompile class source, using up-to-date compiler error:and without specifying "-target" type options. consequence of ignoring error:this warning reflective operations on class incorrectly error:indicate *not* inner class. information:build successful information:total time: 45.933 secs information:328 errors information:0 warnings information:see complete output in console 

i think errors came .apache.commons:commons-collections library. use it? if yes, need configure proguard specified exclusions apache library specifications.