重启后尝试在 WakefulBroadcastReceiver 中创建新意图时出现 NullPointerException

Question

我写了一个 WakefulBroadcastReceiver 的子class，它在用户设备重启时接收 "android.intent.action.BOOT_COMPLETED" 动作。

它在我的 Nexus 设备上工作正常但在三星、Verizon 等其他一些设备上却没有。对于这些设备，我在 onReceive() 的这一行 Intent service = new Intent(context, MyAlarmOnBootService.class); 作为

java.lang.RuntimeException: Unable to start receiver com.android.myapp.receiver.MyWakefulAlarmOnBootReceiver: java.lang.NullPointerException
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2244)
at android.app.ActivityThread.access00(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1279)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4854)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.os.Bundle.putAll(Bundle.java:303)
at android.content.Intent.putExtras(Intent.java:5762)
at com.android.myapp.receiver.MyWakefulAlarmOnBootReceiver.onReceive(MyWakefulAlarmOnBootReceiver.java:30)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2237)
... 10 more

这是我的接收器class:

public class MyWakefulAlarmOnBootReceiver extends
        WakefulBroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        Log.d("MyApp", "receiver started after reboot");                

        Intent service = new Intent(context, MyAlarmOnBootService.class);//this is the line where I am getting NPE.
        service.putExtras(intent.getExtras());

        startWakefulService(context, service);
    }

}

我的Manifest文件（此文件只显示相关部分）：

<?xml version="1.0" encoding="utf-8"?>
    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="25" />

    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

        <receiver android:name=".receiver.MyWakefulAlarmOnBootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

    <service
        android:name=".service.MyAlarmOnBootService"
        android:enabled="true" />
...

是不是和三星智能管家应用杀应用和闹钟有关？如果是，我的接收器是如何被触发的？ onReceive() 中的上下文参数是否有问题？请帮我。它在我的 Nexus 5 上运行良好。

Answer 1

Intent service = new Intent(context, MyAlarmOnBootService.class);//this is the line where I am getting NPE.

其实这不是线。下一行引发的异常

service.putExtras(intent.getExtras());

您创建了没有额外内容的新 Intent，并将其作为参数传递给 putExtra() 这就是您的错误之处。

重启后尝试在 WakefulBroadcastReceiver 中创建新意图时出现 NullPointerException

NullPointerException while trying to create a new intent in WakefulBroadcastReceiver after reboot

android

android-broadcastreceiver