> Task :app:mergeDexDebug FAILED
AGPBI: {"kind":"error","text":"Cannot fit requested classes in a single dex file (# methods: 96574 > 65536)","sources":[{}],"tool":"D8"}
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:
The number of method references in a .dex file cannot exceed 64K.
Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html
   at com.android.builder.dexing.D8DexArchiveMerger.getExceptionToRethrow(D8DexArchiveMerger.java:131)
   at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:118)
   at com.android.build.gradle.internal.transforms.DexMergerTransformCallable.call(DexMergerTransformCallable.java:102)
   at com.android.build.gradle.internal.tasks.DexMergingTaskRunnable.run(DexMergingTask.kt:444)
   at com.android.build.gradle.internal.tasks.Workers$ActionFacade.run(Workers.kt:335)
   at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:39)
   at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.execute(NoIsolationWorkerFactory.java:61)
   at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
   at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
   at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
   at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
   at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
   at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:55)
   at org.gradle.workers.internal.DefaultWorkerExecutor$1.call(DefaultWorkerExecutor.java:105)
   at org.gradle.workers.internal.DefaultWorkerExecutor$1.call(DefaultWorkerExecutor.java:99)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:215)
   at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
   at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
   at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
   at java.lang.Thread.run(Thread.java:748)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete
   at com.android.tools.r8.utils.t.a(:55)
   at com.android.tools.r8.D8.run(:11)
   at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:116)
   ... 30 more
Caused by: com.android.tools.r8.utils.AbortException: Error: null, Cannot fit requested classes in a single dex file (# methods: 96574 > 65536)
   at com.android.tools.r8.utils.Reporter.a(:21)
   at com.android.tools.r8.utils.Reporter.a(:7)
   at com.android.tools.r8.dex.VirtualFile.a(:33)
   at com.android.tools.r8.dex.VirtualFile$h.a(:5)
   at com.android.tools.r8.dex.ApplicationWriter.a(:13)
   at com.android.tools.r8.dex.ApplicationWriter.write(:35)
   at com.android.tools.r8.D8.d(:44)
   at com.android.tools.r8.D8.b(:1)
   at com.android.tools.r8.utils.t.a(:23)
   ... 32 more

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeDexDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:
     The number of method references in a .dex file cannot exceed 64K.
     Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 18s
44 actionable tasks: 11 executed, 33 up-to-date

在网上看了很多都是说;解决办法：
在主项目的build.gradle中添加JDK1.8的支持

compileOptions {        sourceCompatibility JavaVersion.VERSION_1_8        targetCompatibility JavaVersion.VERSION_1_8    }

实际操作中还是报错

Android Studio报错：

The number of method references in a .dex file cannot exceed 64K.
Caused by: com.android.tools.r8.utils.AbortException: Error: Cannot fit requested classes in a single dex file (# methods: 68815 > 65536)

解决方案

build.gradle文件android的defaultConfig里面增加multiDexEnabled true

 defaultConfig {        applicationId "com.droi.jetpack"        minSdkVersion 16        targetSdkVersion 29        versionCode 1        versionName "1.0"        multiDexEnabled true        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"        javaCompileOptions { annotationProcessorOptions { includeCompileClasspath = true }

build.gradle文件dependencies里面增加implementation 'com.android.support:multidex:1.0.3'

dependencies {    implementation fileTree(dir: 'libs', include: ['*.jar'])    implementation 'androidx.appcompat:appcompat:1.0.2'    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'    testImplementation 'junit:junit:4.12'    androidTestImplementation 'androidx.test.ext:junit:1.1.0'    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'    implementation project(":libnetwork")    implementation 'com.android.support:multidex:1.0.3'}

Application类中增加

public class MyApp extends MultiDexApplication {    @Override    protected void attachBaseContext(Context base) {        super.attachBaseContext(base);        MultiDex.install(this);    }}

完美解决....记录一下

编译报错 Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete

解决方案

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