我编写了一个简单的代码，使用Android的东西在raspberry pi 3上获取gpio列表，但是遇到了很多错误。
这是我的代码
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
PeripheralManager pioManager = PeripheralManager.getInstance();
Log.d(TAG, "Available GPIO: " + pioManager.getGpioList());
}
清单文件-
<uses-permission android:name="com.google.android.things.permission.USE_PERIPHERAL_IO"/>
<uses-permission android:name="com.google.android.things.permission.MANAGE_INPUT_DRIVERS" />
<application>
<uses-library android:name="com.google.android.things"/>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.IOT_LAUNCHER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
渐变构建-
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
compileOnly 'com.google.android.things:androidthings:+'
}
现在是错误-
E/AndroidRuntime: FATAL EXCEPTION: main
Process: yashkushwaha.co.in.my, PID: 7725
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/things/pio/PeripheralManager;
at yashkushwaha.co.in.my.MainActivity.onCreate(MainActivity.java:38)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Activity.performCreate(Activity.java:6991)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.things.pio.PeripheralManager" on path: DexPathList[[zip file "/system/framework/com.google.android.things.jar", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/base.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_dependencies_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_resources_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_0_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_1_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_2_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_3_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_4_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_5_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_6_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_7_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_8_apk.apk", zip file "/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/lib/arm, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at yashkushwaha.truckit.co.in.my.MainActivity.onCreate(MainActivity.java:38)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Activity.performCreate(Activity.java:6991)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Suppressed: java.io.IOException: No original dex files found for dex location /data/app/yashkushwaha.truckit.co.in.my-mnuUZ4TWOU0_pLFPgHW6NQ==/split_lib_resources_apk.apk
at dalvik.system.DexFile.openDexFileNative(Native Method)
at dalvik.system.DexFile.openDexFile(DexFile.java:353)
at dalvik.system.DexFile.<init>(DexFile.java:100)
at dalvik.system.DexFile.<init>(DexFile.java:74)
at dalvik.system.DexPathList.loadDexFile(DexPathList.java:374)
at dalvik.system.DexPathList.makeDexElements(DexPathList.java:337)
at dalvik.system.DexPathList.<init>(DexPathList.java:157)
at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)
at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)
at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:69)
E/AndroidRuntime: at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:35)
at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:693)
at android.app.LoadedApk.getClassLoader(LoadedApk.java:727)
at android.app.LoadedApk.getResources(LoadedApk.java:954)
at android.app.ContextImpl.createAppContext(ContextImpl.java:2270)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639)
at android.app.ActivityThread.-wrap1(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
... 6 more
请帮我解决这个问题，因为我是android Things开发的新手，顺便说一句，我的Android Things版本是1.0.2，Android Studio版本是3.1.3
谢谢！
答案 0 :(得分：0)
更改应用级build.gradle文件：
compileOnly 'com.google.android.things:androidthings:+'
到
implementation 'com.google.android.things:androidthings:+'