Execution failed for task ':libuvc:ndkBuild'.

[MrAdi149]

i tried your Android Usb Camera project but i got erron on ndkBuild, please help me to solve the issue

my local.properties file look like this:

sdk.dir=C:\Users\EXT.USER\AppData\Local\Android\Sdk
#ndk.dir=C:\Users\EXT.USER\AppData\Local\Android\Sdk\ndk\27.0.11902837

my build.gradle(:libuvc) look like this:

apply plugin: 'com.android.library'

import org.apache.tools.ant.taskdefs.condition.Os

android {
namespace = "com.jiangdg.uvccamera"
buildToolsVersion = "34.0.0"
compileSdk = 35

compileOptions {
	sourceCompatibility = JavaVersion.VERSION_1_8
	targetCompatibility = JavaVersion.VERSION_1_8
}

defaultConfig {
	minSdk = 24
	targetSdk = 34
}

lintOptions {
	checkReleaseBuilds false
	abortOnError false
	disable 'MissingTranslation'
}

ndkVersion '27.0.11902837'

buildTypes {
	release {
		minifyEnabled false
		proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
	}
}

}

tasks.withType(JavaCompile) {
compileTask -> compileTask.dependsOn ndkBuild
}

String getNdkBuildPath() {
Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
def ndkBuildingDir = properties.getProperty("ndk.dir")
def ndkBuildPath = ndkBuildingDir
if (Os.isFamily(Os.FAMILY_WINDOWS)) {
ndkBuildPath = ndkBuildingDir + '/ndk-build.cmd'
} else {
ndkBuildPath = ndkBuildingDir + '/ndk-build'
}
return ndkBuildPath
}

task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
println('executing ndkBuild')
def ndkBuildPath = getNdkBuildPath();
commandLine ndkBuildPath, '-j8', '-C', file('src/main').absolutePath
}

task ndkClean(type: Exec, description: 'clean JNI libraries') {
println('executing ndkBuild clean')
def ndkBuildPath = getNdkBuildPath();
commandLine ndkBuildPath, 'clean', '-C', file('src/main').absolutePath
}

clean.dependsOn 'ndkClean'

dependencies {
implementation fileTree(dir: new File(buildDir, 'libs'), include: '*.jar')
implementation "androidx.appcompat:appcompat:1.7.0"
implementation 'com.elvishew:xlog:1.11.0'
// implementation project(path: ':libuvccommon')
}

now i am getting error like this:

Execution failed for task ':libuvc:ndkBuild'.

A problem occurred starting process 'command 'null/ndk-build.cmd''

• Try:

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• Exception is:
  org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':libuvc:ndkBuild'.
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:130)
  at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:293)
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:128)
  at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:116)
  at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
  at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
  at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
  at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:74)
  at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
  at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
  at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
  at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
  at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
  at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
  at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
  at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
  at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
  at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
  at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
  at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
  at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:42)
  at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:331)
  at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:318)
  at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.lambda$execute$0(DefaultTaskExecutionGraph.java:314)
  at org.gradle.internal.operations.CurrentBuildOperationRef.with(CurrentBuildOperationRef.java:85)
  at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:314)
  at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:303)
  at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:459)
  at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:376)
  at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
  at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:48)
  Caused by: org.gradle.process.internal.ExecException: A problem occurred starting process 'command 'null/ndk-build.cmd''
  at org.gradle.process.internal.DefaultExecHandle.execExceptionFor(DefaultExecHandle.java:241)
  at org.gradle.process.internal.DefaultExecHandle.setEndStateInfo(DefaultExecHandle.java:218)
  at org.gradle.process.internal.DefaultExecHandle.failed(DefaultExecHandle.java:396)
  at org.gradle.process.internal.ExecHandleRunner.lambda$run$3(ExecHandleRunner.java:102)
  at org.gradle.internal.operations.CurrentBuildOperationRef.with(CurrentBuildOperationRef.java:85)
  at org.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java:101)
  at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
  at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:48)
  Caused by: net.rubygrapefruit.platform.NativeException: Could not start 'null/ndk-build.cmd'

[Clark-caipeiyuan]

收到了，谢谢！

[MrAdi149]

请帮我解决这个问题，这真的很重要