android – Google Cloud Messaging(GCM) – 无法实例化接收器 – java.lang.ClassNotFoundException

概述一旦应用程序启动或从服务器发送推送通知,就会发生以下回溯. 08-31 02:00:14.733: E/AndroidRuntime(30973): java.lang.RuntimeException: Unable to instantiate receiver com.example.smsmining.GcmBroadcastReceiver: java.lang.ClassNotFoun 一旦应用程序启动或从服务器发送推送通知,就会发生以下回溯.

08-31 02:00:14.733: E/AndroIDRuntime(30973): java.lang.RuntimeException: Unable to instantiate receiver com.example.smsmining.GcmbroadcastReceiver: java.lang.classNotFoundException: DIDn't find class "com.example.smsmining.GcmbroadcastReceiver" on path: DexPathList[[zip file "/data/app/com.example.smsmining-1.apk"],nativelibraryDirectorIEs=[/data/app-lib/com.example.smsmining-1,/vendor/lib,/system/lib]]08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.app.ActivityThread.handleReceiver(ActivityThread.java:2405)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.app.ActivityThread.access00(ActivityThread.java:141)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1332)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.os.Handler.dispatchMessage(Handler.java:99)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.os.Looper.loop(Looper.java:137)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.app.ActivityThread.main(ActivityThread.java:5103)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at java.lang.reflect.Method.invokeNative(Native Method)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at java.lang.reflect.Method.invoke(Method.java:525)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:553)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at dalvik.system.NativeStart.main(Native Method)08-31 02:00:14.733: E/AndroIDRuntime(30973): Caused by: java.lang.classNotFoundException: DIDn't find class "com.example.smsmining.GcmbroadcastReceiver" on path: DexPathList[[zip file "/data/app/com.example.smsmining-1.apk"],/system/lib]]08-31 02:00:14.733: E/AndroIDRuntime(30973):    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at java.lang.classLoader.loadClass(ClassLoader.java:501)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at java.lang.classLoader.loadClass(ClassLoader.java:461)08-31 02:00:14.733: E/AndroIDRuntime(30973):    at androID.app.ActivityThread.handleReceiver(ActivityThread.java:2400)08-31 02:00:14.733: E/AndroIDRuntime(30973):    ... 10 more

我的清单文件：

<?xml version="1.0" enCoding="utf-8"?><manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"    package="com.example.smsmining"    androID:versionCode="1"    androID:versionname="1.0" >    <uses-sdk        androID:minSdkVersion="9"        androID:targetSdkVersion="16" />    <uses-permission androID:name="androID.permission.READ_SMS"/>    <uses-permission androID:name="androID.permission.RECEIVE_SMS"/>    <uses-permission androID:name="androID.permission.READ_CONTACTS"/>    <uses-permission androID:name="androID.permission.INTERNET"/>    <uses-permission androID:name="androID.permission.GET_ACCOUNTS" />    <uses-permission androID:name="androID.permission.WAKE_LOCK" />     <permission androID:name="com.example.smsmining.permission.C2D_MESSAGE"        androID:protectionLevel="signature" />    <uses-permission androID:name="com.example.smsmining.permission.C2D_MESSAGE" />    <!-- This app has permission to register and receive data message. -->    <uses-permission        androID:name="com.Google.androID.c2dm.permission.RECEIVE" />    <application        androID:allowBackup="true"        androID:icon="@drawable/ic_launcher"        androID:label="@string/app_name"        androID:theme="@style/Apptheme" >        <activity            androID:name=".MainActivity"            androID:label="@string/app_name" >            <intent-filter>                <action androID:name="androID.intent.action.MAIN" />                <category androID:name="androID.intent.category.LAUNCHER" />            </intent-filter>        </activity>         <receiver androID:name="com.example.smsmining.SMSbroadcastReceiver">            <intent-filter>                <action androID:name="androID.provIDer.Telephony.SMS_RECEIVED"/>            </intent-filter>        </receiver>         <receiver            androID:name=".GcmbroadcastReceiver"            androID:permission="com.Google.androID.c2dm.permission.SEND" >            <intent-filter>                <action androID:name="com.Google.androID.c2dm.intent.RECEIVE" />                <action androID:name="com.Google.androID.c2dm.intent.REGISTRATION" />                <category androID:name="com.example.smsmining" />            </intent-filter>        </receiver>        <service androID:name=".GCMIntentService" />    </application></manifest>

GcmbroadcastReceiver.java

package com.example.smsmining;import androID.app.Activity;import androID.content.Componentname;import androID.content.Context;import androID.content.Intent;import androID.support.v4.content.WakefulbroadcastReceiver;/** * This {@code WakefulbroadcastReceiver} takes care of creating and managing a * partial wake lock for your app. It passes off the work of processing the GCM * message to an {@code IntentService},while ensuring that the device does not * go back to sleep in the Transition. The {@code IntentService} calls * {@code GcmbroadcastReceiver.completeWakefulintent()} when it is ready to * release the wake lock. */public class GcmbroadcastReceiver extends WakefulbroadcastReceiver {    @OverrIDe    public voID onReceive(Context context,Intent intent) {        // Explicitly specify that GcmIntentService will handle the intent.        Componentname comp = new Componentname(context.getPackagename(),GcmIntentService.class.getname());        // Start the service,keePing the device awake while it is launching.        startWakefulService(context,(intent.setComponent(comp)));        setResultCode(Activity.RESulT_OK);    }}

GcmIntentService.java

public class GcmIntentService extends IntentService {    public static final int NOTIFICATION_ID = 1;    private notificationmanager mnotificationmanager;    NotificationCompat.Builder builder;    public GcmIntentService() {        super("GcmIntentService");    }    public static final String TAG = "GCM Demo";    @OverrIDe    protected voID onHandleIntent(Intent intent) {        Bundle extras = intent.getExtras();        GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);        // The getMessageType() intent parameter must be the intent you received        // in your broadcastReceiver.        String messageType = gcm.getMessageType(intent);        if (!extras.isEmpty()) {  // has effect of unparcelling Bundle            /*             * Filter messages based on message type. Since it is likely that GCM will be             * extended in the future with new message types,just ignore any message types you're             * not interested in,or that you don't recognize.             */            if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)) {                sendNotification("Send error: " + extras.toString());            } else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)) {                sendNotification("Deleted messages on server: " + extras.toString());            // If it's a regular GCM message,do some work.            } else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {                // This loop represents the service doing some work.                for (int i = 0; i < 5; i++) {                    Log.i(TAG,"Working... " + (i + 1)                            + "/5 @ " + SystemClock.elapsedRealtime());                    try {                        Thread.sleep(5);                    } catch (InterruptedException e) {                    }                }                Log.i(TAG,"Completed work @ " + SystemClock.elapsedRealtime());                // Post notification of received message.                sendNotification("Received: " + extras.toString());                Log.i(TAG,"Received: " + extras.toString());            }        }        // Release the wake lock provIDed by the WakefulbroadcastReceiver.        GcmbroadcastReceiver.completeWakefulintent(intent);    }    // Put the message into a notification and post it.    // This is just one simple example of what you might choose to do with    // a GCM message.    private voID sendNotification(String msg) {        mnotificationmanager = (notificationmanager)                this.getSystemService(Context.NOTIFICATION_SERVICE);        PendingIntent contentIntent = PendingIntent.getActivity(this,new Intent(this,MainActivity.class),0);        NotificationCompat.Builder mBuilder =                new NotificationCompat.Builder(this)        .setSmallicon(R.drawable.ic_launcher)        .setContentTitle("GCM Notification")        .setStyle(new NotificationCompat.BigTextStyle()        .bigText(msg))        .setContentText(msg);        mBuilder.setContentIntent(contentIntent);        mnotificationmanager.notify(NOTIFICATION_ID,mBuilder.build());    }}

解决方法 我有同样的错误.这对我有帮助.
尝试检查v.4库.
属性 – > Java构建路径 – >订单和导出

编辑：选择项目并转到：PropertIEs-> Java Build Path-> Order and Export,确保在列表中选中了androID.support.v4库,如果没有,请标记它. (我假设您已经将库导入到项目中),清理项目并且它应该可以工作

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