Information:Gradle tasks [:app:assembleRelease]
Error:UNEXPECTED TOP-LEVEL ERROR:
Error:java.lang.OutOfMemoryError: GC overhead limit exceeded
Error:at java.util.Arrays.copyOfRange(Arrays.java:3664)
Error:at java.lang.String.<init>(String.java:207)
Error:at com.android.dx.rop.cst.CstString.utf8BytesToString(CstString.java:158)
Error:at com.android.dx.rop.cst.CstString.<init>(CstString.java:200)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parseUtf8(ConstantPoolParser.java:420)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:271)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:334)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:310)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parse(ConstantPoolParser.java:153)
Error:at com.android.dx.cf.cst.ConstantPoolParser.parseIfNecessary(ConstantPoolParser.java:127)
Error:at com.android.dx.cf.cst.ConstantPoolParser.getPool(ConstantPoolParser.java:118)
Error:at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:505)
Error:at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:420)
Error:at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:402)
Error:at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:253)
Error:at com.android.dx.command.dexer.Main.parseClass(Main.java:774)
Error:at com.android.dx.command.dexer.Main.access$1600(Main.java:86)
Error:at com.android.dx.command.dexer.Main$ClassParserTask.call(Main.java:1745)
Error:at com.android.dx.command.dexer.Main.processClass(Main.java:757)
Error:at com.android.dx.command.dexer.Main.processFileBytes(Main.java:725)
Error:at com.android.dx.command.dexer.Main.access$1200(Main.java:86)
Error:at com.android.dx.command.dexer.Main$FileBytesConsumer.processFileBytes(Main.java:1698)
Error:at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
Error:at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
Error:at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
Error:at com.android.dx.command.dexer.Main.processOne(Main.java:679)
Error:at com.android.dx.command.dexer.Main.processAllFiles(Main.java:571)
Error:at com.android.dx.command.dexer.Main.runMultiDex(Main.java:368)
Error:at com.android.dx.command.dexer.Main.runDx(Main.java:289)
Error:at com.android.dx.command.dexer.Main.main(Main.java:247)
Error:at com.android.dx.command.Main.main(Main.java:94)
Error:Execution failed for task ':app:transformClassesWithDexForRelease'.

> com.android.build.api.transform.TransformException: 

com.android.ide.common.process.ProcessException:java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.android.dx.command.Main with arguments {--dex --num-threads=4 --multi-dex --main-dex-list E:\xunjian3\WaterGroupMgr\app\build\intermediates\multi-dex\release\maindexlist.txt --output E:\xunjian3\WaterGroupMgr\app\build\intermediates\transforms\dex\release\0 --min-sdk-version 19 E:\xunjian3\WaterGroupMgr\app\build\intermediates\transforms\jarMerging\release\0.jar}

Information:BUILD FAILED in 3m 25s
Information:34 errors
Information:0 warnings

Information:See complete output in console

加粗的那段，仔細排查就可以找到錯誤