Question

我试图启动此命令：

adb shell am broadcast -a android.provider.Telephony.SMS_RECEIVED --es sms_body "TEXTTEXTTEXT"   -n com.example.name/.receivers.SmsReceiver

此代码抛出空指针异常：

公共类SmsReceiver扩展了BroadcastReceiver {

...

private Context mContext;
private Intent mIntent;

public void onReceive(Context context, Intent intent) {
    mContext = context;
    mIntent = intent;

    String action = intent.getAction();
    if (action.equals(Const.ACTION_SMS_RECEIVED)) {
        String address = "", str = "";

        SmsMessage[] msgs = getMessagesFromIntent(mIntent);

        ...

    }
}

public static SmsMessage[] getMessagesFromIntent (Intent intent){
        Object[] messages = (Object[]) intent.getSerializableExtra("pdus");
        byte[][] pduObjs = new byte[messages.length][];

        for (int i = 0; i < messages.length; i++) {
            pduObjs[i] = (byte[]) messages[i];
        }

        byte[][] pdus = new byte[pduObjs.length][];
        int pduCount = pdus.length;
        SmsMessage[] msgs = new SmsMessage[pduCount];
        for (int i = 0; i < pduCount; i++) {
            pdus[i] = pduObjs[i];
            msgs[i] = SmsMessage.createFromPdu(pdus[i]);
        }
        return msgs;
}

}

这是控制台输出：

12-30 15:48:34.724  26032-26032/com.example.name E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.name, PID: 26032
    java.lang.RuntimeException: Unable to start receiver com.example.name.receivers.SmsReceiver: java.lang.NullPointerException
            at android.app.ActivityThread.handleReceiver(ActivityThread.java:2567)
            at android.app.ActivityThread.access$1800(ActivityThread.java:161)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5356)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException
            at com.example.name.receivers.SmsReceiver.getMessagesFromIntent(SmsReceiver.java:60)
            at com.example.name.receivers.SmsReceiver.onReceive(SmsReceiver.java:30)
            at android.app.ActivityThread.handleReceiver(ActivityThread.java:2552)
            at android.app.ActivityThread.access$1800(ActivityThread.java:161)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5356)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

现在，这是棘手的部分。我在SmsReceiver中的代码适用于普通的SMS消息。当我尝试＆＃34;模拟＆＃34;这个问题，我收到这个错误。 Probalby我用adb命令混淆了一些东西。我试着自己解决它，但没有运气。你知道我做错了什么吗？

Answer 1

你知道我做错了吗？

您正在发送一个带有名为sms_body的字符串的广播。您的代码没有使用它。您的代码使用的Serializable额外名为pdus。

当我尝试“模拟”此问题时，我收到此错误。

使用DDMS中的“模拟器控制”选项卡，或者模拟器控制台（例如telnet localhost 5554），将模拟的SMS消息发送到模拟器。

或者，将您的SMS处理逻辑移动到可以使用JUnit进行测试的Java类。

adb shell am broadcast - BroadcastReceiver抛出nullpointer

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