致命異常：java.lang.NoSuchMethodError

Question

我正在處理這個問題：

Fatal Exception: java.lang.NoSuchMethodError
No virtual method getActiveNetwork()Landroid/net/Network; in class Landroid/net/ConnectivityManager; or its super classes (declaration of 'android.net.ConnectivityManager' appears in /system/framework/framework.jar:classes2.dex)

有我的代碼：

 public boolean isNetworkAvailable() {

        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

        if (connectivityManager != null) {


            if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
                NetworkCapabilities capabilities = connectivityManager.getNetworkCapabilities(connectivityManager.getActiveNetwork());
                if (capabilities != null) {
                    if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {

                        return true;
                    } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

                        return true;
                    } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {

                        return true;
                    }
                }
            }
        }

    return false;}

有堆棧跟蹤：

Fatal Exception: java.lang.NoSuchMethodError: No virtual method getActiveNetwork()Landroid/net/Network; in class Landroid/net/ConnectivityManager; or its super classes (declaration of 'android.net.ConnectivityManager' appears in /system/framework/framework.jar:classes2.dex)
   at com.olgazelenko.esofer.MainMenu.isNetworkAvailable(MainMenu.java:307)
   at com.olgazelenko.esofer.MainMenu.onCreate(MainMenu.java:75)
   at android.app.Activity.performCreate(Activity.java:6178)
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2648)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769)
   at android.app.ActivityThread.access$900(ActivityThread.java:177)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1430)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:135)
   at android.app.ActivityThread.main(ActivityThread.java:5910)
   at java.lang.reflect.Method.invoke(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:372)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)

有人知道如何解決嗎？

Answer 1

當您使用一個版本的依賴項進行編譯但正在使用不同版本運行代碼時，經常會發生此錯誤。

在這里，看起來com.olgazelenko.esofer.MainMenu.isNetworkAvailable(MainMenu.java:307)從 android 調用了一個在您執行期間未找到的方法。

這個方法getActiveNetwork似乎是在Android SDK API Level 23中添加的。你可能會嘗試在舊版本中使用它。 請參閱https://developer.android.com/reference/android/net/ConnectivityManager#getActiveNetwork() 。 嘗試升級您的 minSdkVersion ： https : //developer.android.com/guide/topics/manifest/uses-sdk-element