Android 无法启动接收器异常

问题：应用程序在启动时不时抛出en异常，但并非总是如此。 我不明白为什么有时会发生这种情况，但有时不会。 任何建议都将不胜感激

一些日志：

04-18 17:58:12.437: E/AndroidRuntime(26208): FATAL EXCEPTION: main
04-18 17:58:12.437: E/AndroidRuntime(26208): java.lang.RuntimeException: Unable to start receiver com.cm.clou.ContactsListUpdateReceiver: java.lang.NullPointerException
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:1805)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.app.ActivityThread.access$2400(ActivityThread.java:117)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.os.Handler.dispatchMessage(Handler.java:99)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.os.Looper.loop(Looper.java:130)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.app.ActivityThread.main(ActivityThread.java:3683)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at java.lang.reflect.Method.invokeNative(Native Method)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at java.lang.reflect.Method.invoke(Method.java:507)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at dalvik.system.NativeStart.main(Native Method)
04-18 17:58:12.437: E/AndroidRuntime(26208): Caused by: java.lang.NullPointerException
04-18 17:58:12.437: E/AndroidRuntime(26208):    at com.cm.clou.ConversationsListActivity.notifyAdaper(ConversationsListActivity.java:270)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at com.cm.clou.ContactsListUpdateReceiver.onReceive(ContactsListUpdateReceiver.java:17)
04-18 17:58:12.437: E/AndroidRuntime(26208):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:1794)

接收方代码：

public class ContactsListUpdateReceiver extends BroadcastReceiver {

    public static final String TAG = ContactsListUpdateReceiver.class.getSimpleName();

    @Override
    public void onReceive(Context context, Intent intent) {
        String message = intent.getStringExtra("message");
        if (message != null) {
            Log.d(TAG, "Uslishali otvet ot servisa po apdejtu contactov: " + message);
            ConversationsListActivity.notifyAdaper(context);
        }
    }

}

private static ConversationsListCursorAdapter conversationsListCursorAdapter = null;
@SuppressLint("NewApi")
    public static void notifyAdaper(Context context) {

        Uri uri = ClouContentProvider.CONVERSATIONS_CONTENT_URI;
        Cursor cursor = null;

        if (android.os.Build.VERSION.SDK_INT < 11) {
            cursor = context.getContentResolver().query(uri, null, null, null, null);
        } else {
            CursorLoader cursorLoader = new CursorLoader(context, uri, null, null, null, null);
            cursor = cursorLoader.loadInBackground();
        }

        conversationsListCursorAdapter.changeCursor(cursor);
        conversationsListCursorAdapter.notifyDataSetChanged();
    }

在舱单中：

<receiver
    android:name="com.cm.clou.ContactsListUpdateReceiver"
    android:enabled="true"
    android:exported="false" >
    <intent-filter>
        <action android:name="com.cm.clou.ACTION_CONTACTS_LIST_UPDATE" />
    </intent-filter>
</receiver>

以及我的notifyAdaper代码：

public class ContactsListUpdateReceiver extends BroadcastReceiver {

    public static final String TAG = ContactsListUpdateReceiver.class.getSimpleName();

    @Override
    public void onReceive(Context context, Intent intent) {
        String message = intent.getStringExtra("message");
        if (message != null) {
            Log.d(TAG, "Uslishali otvet ot servisa po apdejtu contactov: " + message);
            ConversationsListActivity.notifyAdaper(context);
        }
    }

}

private static ConversationsListCursorAdapter conversationsListCursorAdapter = null;
@SuppressLint("NewApi")
    public static void notifyAdaper(Context context) {

        Uri uri = ClouContentProvider.CONVERSATIONS_CONTENT_URI;
        Cursor cursor = null;

        if (android.os.Build.VERSION.SDK_INT < 11) {
            cursor = context.getContentResolver().query(uri, null, null, null, null);
        } else {
            CursorLoader cursorLoader = new CursorLoader(context, uri, null, null, null, null);
            cursor = cursorLoader.loadInBackground();
        }

        conversationsListCursorAdapter.changeCursor(cursor);
        conversationsListCursorAdapter.notifyDataSetChanged();
    }

---

private static ConversationsListCursorAdapter ConversationsListCursorAdapter=null；
@SuppressLint（“新API”）
公共静态void notifyAdaper（上下文）{
Uri Uri=ClouContentProvider.CONVERSATIONS\u CONTENT\u Uri；
游标=空；
if（android.os.Build.VERSION.SDK_INT<11）{
cursor=context.getContentResolver（）.query（uri，null，null，null，null）；
}否则{
CursorLoader CursorLoader=新的CursorLoader（上下文、uri、null、null、null、null）；
cursor=cursorLoader.loadInBackground（）；
}
conversationsListCursorAdapter.changeCursor（光标）；
conversationsListCursorAdapter.notifyDataSetChanged（）；
}

看起来您从未实例化过会话列表指针或适配器

---

您需要在访问它之前实例化它。

notifyAdaper中第270行的内容是什么？conversationsListCursorAdapter似乎为空。第270行-conversationsListCursorAdapter.changeCursor（光标）；看起来我的服务将消息发送到广播接收器的速度比会话光标或适配器启动的速度快。我在AsyncTask的onPostExecute中启动它。但在此之前，异步任务称为两个服务。所以这一定是我的问题。谢谢你的建议。