我有一个Broadcastreceiver
来检查CONNECTIVITY_CHANGE
,它有时会与消息崩溃:
04-05 18:23:47.080 5561-5561/tenkol.design.com.imbrecords E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to instantiate receiver tenkol.design.com.imbrecords.NetworkChangeReceiver: java.lang.ClassNotFoundException: tenkol.design.com.imbrecords.NetworkChangeReceiver
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2541)
at android.app.ActivityThread.access$1500(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1421)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5520)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: tenkol.design.com.imbrecords.NetworkChangeReceiver
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2536)
at android.app.ActivityThread.access$1500(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1421)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5520)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796)
at dalvik.system.NativeStart.main(Native Method)
接收器的目标很简单 - 当互联网连接消失时,jsut会做吐司。
清单:
<receiver
android:name=".NetworkChangeReceiver"
android:label="NetworkChangeReceiver" >
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
和接收者本身:
public class NetworkChangeReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, final Intent intent) {
String status = InternetConnection.getConnectivityStatusString(context);
if (status != null) {
if (status.equals("Not connected to Internet")) {
Toast.makeText(context, context.getString(R.string.lost_internet_connection), Toast.LENGTH_SHORT).show();
}
}
}
这些是它使用的方法:
public static int getConnectivityStatus(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (null != activeNetwork) {
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
return TYPE_WIFI;
if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
return TYPE_MOBILE;
}
return TYPE_NOT_CONNECTED;
}
public static String getConnectivityStatusString(Context context) {
int conn = InternetConnection.getConnectivityStatus(context);
String status = null;
if (conn == InternetConnection.TYPE_NOT_CONNECTED) {
status = "Not connected to Internet";
}
return status;
}
任何导致崩溃的想法?感谢。
答案 0 :(得分:3)
ClassNotFoundException
表示您的应用的APK尚未正确构建。它似乎是dex
构建错误;这里的线索是BaseDexClassLoader.findClass()
方法抛出异常。
我之前在以下情况中观察到此错误:
1。我正在使用具有启用ART的Kitkat的物理设备(即非仿真器)。当我在使用Dalvik运行时的另一台Kitkat设备上运行应用程序时,错误似乎已经消失。
2。由于我将SVN转移到其他位置时出现.dex
构建错误,导致出现同样的问题。我完全删除了旧项目,并在我的计算机上从原始项目创建了一个新的存储库,完全重建项目后,错误没有重新出现。
3. 如果将Eclipse与Maven一起使用,并且已启用multidex
,请尝试禁用它并构建项目。如果使用Android Studio,请设置multiDexEnabled = false
。这是导致此错误的原因。
基本上你需要正确地重建项目,错误就会消失。