运行Ionic1应用程序时，出现以下错误。我有JDK版本7（已安装），但无法正常工作。
我的系统和离子信息如下所示。
离子：
ionic（Ionic CLI）：4.0.2（C：\ Users \ admin \ AppData \ Roaming \ npm \ node_modules \ ionic 离子框架：ionic1 1.3.1 @ ionic / v1-toolkit：1.0.22
科尔多瓦：
cordova（Cordova CLI）：7.0.0 Cordova平台：android 6.3.0
系统：
Android SDK工具：26.1.1 NodeJS：v6.10.0（C：\ Program Files \ nodejs \ node.exe） npm：3.10.10 作业系统：Windows 10
环境：
ANDROID_HOME：C：\ Users \ admin \ AppData \ Local \ Android \ Sdk
:transformClassesWithDexForDebug FAILED
BUILD FAILED
Total time: 12.152 secs
1 error; aborting
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Return code 1 for dex process
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Error: cmd: Command failed with exit code 1 Error output:
Dex: Error converting bytecode to dex:
Cause: Dex cannot parse version 52 byte code.
This is caused by library dependencies that have been compiled using Java 8 or above.
If you are using the 'java' gradle plugin in a library submodule add
targetCompatibility = '1.7'
sourceCompatibility = '1.7'
to that submodule's build.gradle file.
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.RuntimeException: Exception parsing classes
at com.android.dx.command.dexer.Main.processClass(Main.java:775)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:741)
at com.android.dx.command.dexer.Main.access$1200(Main.java:88)
at com.android.dx.command.dexer.Main$FileBytesConsumer.processFileBytes(Main.java:1683)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
at com.android.dx.command.dexer.Main.processOne(Main.java:695)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:560)
at com.android.dx.command.dexer.Main.runMultiDex(Main.java:376)
at com.android.dx.command.dexer.Main.run(Main.java:290)
at com.android.builder.internal.compiler.DexWrapper.run(DexWrapper.java:54)
at com.android.builder.core.DexByteCodeConverter.lambda$dexInProcess$0(DexByteCodeConverter.java:173)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)
at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:476)
at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)
at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388)
at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251)
at com.android.dx.command.dexer.Main.parseClass(Main.java:787)
at com.android.dx.command.dexer.Main.access$1600(Main.java:88)
at com.android.dx.command.dexer.Main$ClassParserTask.call(Main.java:1722)
at com.android.dx.command.dexer.Main.processClass(Main.java:773)
... 16 more
1 error; aborting
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Return code 1 for dex process