Android BroadcastReceiver在启动完成后不工作

我正在尝试在启动完成后立即拦截传入的SMS，但我在这一行中遇到了NullPointerException问题：

Object[] rawMsgs=(Object[])intent.getExtras().get("pdus");

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

这是我的舱单：

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

---

谢谢。

这里的问题是，您的BroadcastReceiver实现已映射到两个意图-

android.provider.Telephony.SMS\u RECEIVED

和

android.intent.action.BOOT\u已完成

——但在onReceive实现中，您没有检查正在处理的意图

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

我的猜测是，

android.intent.action.BOOT\u COMPLETED

已经收到，并且

intent.getExtras（）

返回空值。您可以通过向该方法添加一些日志并观察logcat窗口（如果您使用的是Eclipse）来确认这一点

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

如果您编写了一个服务或广播接收器，并将其映射到多个意图，那么检查已接收到的意图并对其进行适当处理是一种良好的做法，这是必不可少的。就我个人而言，我会选择这样的方式：

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
    // boot-related processing here
}
else if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) {
    // SMS-related processing here
}
else {
    // intent not handled - log as a warning as you've registered to receive it
}

您不能假设故障安全行为。为清晰起见，将意图处理逻辑移动到单独的方法中：

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>

if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
    processBootCompletedIntent(intent);
}
else if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) {
    processSmsReceivedIntent(intent);
}
else {
    // intent not handled - log as a warning as you've registered to receive it
}

---

PS-大多数（如果不是全部）“本机”意图操作字符串作为常量保存在相关类中。例如，android.intent.action.BOOT_COMPLETED被定义为intent.action_BOOT_COMPLETED。在存在常量的地方使用这些常量，这样可以避免您输入错误。

谢谢，我们将尝试查看它的运行情况。另外，请优先考虑999。@Phil，所以您建议使用“Intent.ACTION\u BOOT\u COMPLETED”作为常量，而不是“android.Intent.ACTION.BOOT\u COMPLETED”？

    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-    permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar">
        <receiver android:name=".SMSReceiver" 
            android:permission="android.permission.BROADCAST_SMS"
            > 
            <intent-filter android:priority="1000"> 
                <action     android:name="android.provider.Telephony.SMS_RECEIVED"></action>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter> 
        </receiver>
    </application>