java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/content/LocalBroadcastManager; 解决方案
详细错误如下:
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.ydsk.posaidl.mqtt.MqttClient.connect(MqttClient.java:77)
at com.ydsk.posaidl.mqtt.MqttClient.getInstance(MqttClient.java:25)
at com.ydsk.posaidl.ui.MainTransActivity.initMqtt(MainTransActivity.java:125)
at com.ydsk.posaidl.ui.MainTransActivity.onCreate(MainTransActivity.java:63)
at android.app.Activity.performCreate(Activity.java:6769)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2619)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2727)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6121)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.LocalBroadcastManager" on path: DexPathList[[zip file "/data/app/com.ydsk.posaidl-2/base.apk"],nativeLibraryDirectories=[/data/app/com.ydsk.posaidl-2/lib/arm, /private2/lib, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 18 more
java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.LocalBroadcastManager" on path: DexPathList[[zip file "/data/app/com.ydsk.posaidl-2/base.apk"],nativeLibraryDirectories=[/data/app/com.ydsk.posaidl-2/lib/arm, /private2/lib, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
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.ydsk.posaidl.mqtt.MqttClient.connect(MqttClient.java:77)
at com.ydsk.posaidl.mqtt.MqttClient.getInstance(MqttClient.java:25)
at com.ydsk.posaidl.ui.MainTransActivity.initMqtt(MainTransActivity.java:125)
at com.ydsk.posaidl.ui.MainTransActivity.onCreate(MainTransActivity.java:63)
at android.app.Activity.performCreate(Activity.java:6769)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2619)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2727)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6121)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
看见这个问题就是,缺少文件及缺少包引用,但其实不是这样的, 这是由于使用 部分androidx库引起的
ps :其实好像出现过一次但忘记解决办法了,最后是与另一个项目对比发现了解决办法
需要 进行转换
即 在 gradle.properties文件中添加如下属性即可
Automatically convert third-party libraries to use AndroidX
android.enableJetifier=true
Android插件通过重写其二进制文件，自动迁移现有的第三方库以使用AndroidX。
android.useAndroidX=true
安卓插件使用适当的AndroidX库，而不是Support Library。
如此问题解决,