NullPoInterException试图在重新启动后在WawefulBroadCastreceiver中创建新意图时

Question

我已经写了一个waypulbroadcastreceiver的子类，该子类接收到" android.intent.intent.boot_completed"操作时，请重新启动用户设备。



它在我的nexus中工作正常设备，但不在其他一些设备上，例如三星，Verizon等。对于这些设备，我在此行中获得了nullpoInterException（）在此行中 intent service new Intent = new Intent（context，myalarmonbootservice.class.class）; as as as as as as as as

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.access$1500(ActivityThread.java:138)
at android.app.ActivityThread$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 

这是我的接收器类：

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);
    }
}

我的清单文件（此文件中仅显示相关的零件）：

<?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" />
...

这与三星的Smart Manager应用程序有关，杀死应用程序和警报？如果是，我的接收器是如何解雇的？onReceive（）中的上下文参数中是否存在一些问题？请帮我。它在我的Nexus 5上正常工作。

Answer 1

intent service = new Intent（上下文，myalarmonbootservice.class）;//这是我获得NPE的行。

实际上这不是线。下一行提出的例外

service.putextras（intent.getExtras（））;

您创建了没有附加功能的新意图，然后将其作为参数传递给putExtra()这是您错了的地方。