Android——Failed resolution of: Landroid/support/v4/content/LocalBroadcastManager

这个错误主要是LocalBroadcastManager这个类被弃用了，但是呢，在使用mqtt依赖库的时候又用到了这个类，所以导致这个类找不到。此时，就需要在build.gradle文件里添加依赖库了。E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.example.shome, PID: 11394java.lang.NoClassDefFo

QL-L

4716人浏览 · 2022-04-26 08:15:00

QL-L · 2022-04-26 08:15:00 发布

这个错误主要是LocalBroadcastManager这个类被弃用了，但是呢，在使用mqtt依赖库的时候又用到了这个类，所以导致这个类找不到。此时，就需要在build.gradle文件里添加依赖库了。

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.shome, PID: 11394
    java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/content/LocalBroadcastManager;
        at org.eclipse.paho.android.service.MqttAndroidClient.registerReceiver(MqttAndroidClient.java:450)
        at org.eclipse.paho.android.service.MqttAndroidClient.connect(MqttAndroidClient.java:428)
        at com.example.shome.MqttManager.connect(MqttManager.java:142)
        at com.example.shome.MainActivity.onCreate(MainActivity.java:37)
        at android.app.Activity.performCreate(Activity.java:8000)
        at android.app.Activity.performCreate(Activity.java:7984)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.LocalBroadcastManager" on path: DexPathList[[zip file "/data/app/~~XzLtoHPFTAd4kU-vJt3EUA==/com.example.shome-MW_TFWKVh5qOnfmjIYhvdA==/base.apk"],nativeLibraryDirectories=[/data/app/~~XzLtoHPFTAd4kU-vJt3EUA==/com.example.shome-MW_TFWKVh5qOnfmjIYhvdA==/lib/x86, /system/lib, /system_ext/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at org.eclipse.paho.android.service.MqttAndroidClient.registerReceiver(MqttAndroidClient.java:450) 
        at org.eclipse.paho.android.service.MqttAndroidClient.connect(MqttAndroidClient.java:428) 
        at com.example.shome.MqttManager.connect(MqttManager.java:142) 
        at com.example.shome.MainActivity.onCreate(MainActivity.java:37) 
        at android.app.Activity.performCreate(Activity.java:8000) 
        at android.app.Activity.performCreate(Activity.java:7984) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:223) 
        at android.app.ActivityThread.main(ActivityThread.java:7656) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
W/System: A resource failed to call close.

主要操作：

implementation 'com.android.support:support-v4:30.4.1'

然后，我添加了依赖之后出现了以下的错误：这是因为有混合库添加了依赖的原因，这时我们可以在gradle.properties文件中添加一句话，让它支持混合库使用。

Duplicate class android.support.v4.app.INotificationSideChannel found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)

Go to the documentation to learn how to Fix dependency resolution errors.

主要操作：