如何开始接收来自Broadcast Receiver类的PATICULAR SMS的活动

Question

我试图从Broadcast Receiver类开始一个活动。 这是MainActivity.java

package com.wissen.sms; 

import android.app.Activity; 
import android.os.Bundle; 

public class MainActivity extends Activity { 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 
} 

这是SMSReceiver.java

package com.wissen.sms.receiver; 

import com.wissen.sms.Nwact; 

import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.telephony.SmsMessage; 
import android.widget.Toast; 

/** 
* The class is called when SMS is received. 
*/ 
public class SMSReceiver extends BroadcastReceiver { 


    public void onReceive(Context context, Intent intent) { 
     Bundle bundle = intent.getExtras(); 

     Object messages[] = (Object[]) bundle.get("pdus"); 
     SmsMessage smsMessage[] = new SmsMessage[messages.length]; 
     for (int n = 0; n < messages.length; n++) { 
      smsMessage[n] = SmsMessage.createFromPdu((byte[]) messages[n]); 
     } 

     //show first message 
     Toast toast = Toast.makeText(context, "Received SMS: " + smsMessage[0].getMessageBody(), Toast.LENGTH_LONG); 
     toast.show(); 

     //and then start an activity 

     Intent i = new Intent(context,Nwact.class); 
     i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
     context.startActivity(i); 
    } 
} 

这是清单文件： -

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="com.wissen.sms" 
     android:versionCode="1" 
     android:versionName="1.0.0"> 
     <uses-sdk android:minSdkVersion="7" /> 

    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission> 

    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
     <activity android:name=".MainActivity" 
        android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity android:name=".newact"></activity> 

    <receiver android:name=".receiver.SMSReceiver" android:enabled="true"> 
      <intent-filter> 
      <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
      </intent-filter> 
     </receiver> 


    </application> 
</manifest> 

但是当我运行我收到错误日志文件： -

08-31 10:44:38.011: ERROR/AndroidRuntime(749): Uncaught handler: thread main exiting due to uncaught exception 
08-31 10:44:38.031: ERROR/AndroidRuntime(749): java.lang.RuntimeException: Unable to start receiver com.wissen.sms.receiver.SMSReceiver: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.wissen.sms/com.wissen.sms.Nwact}; have you declared this activity in your AndroidManifest.xml? 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ActivityThread.handleReceiver(ActivityThread.java:2646) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ActivityThread.access$3100(ActivityThread.java:119) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.os.Handler.dispatchMessage(Handler.java:99) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.os.Looper.loop(Looper.java:123) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at java.lang.reflect.Method.invoke(Method.java:521) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at dalvik.system.NativeStart.main(Native Method) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.wissen.sms/com.wissen.sms.Nwact}; have you declared this activity in your AndroidManifest.xml? 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ApplicationContext.startActivity(ApplicationContext.java:555) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.content.ContextWrapper.startActivity(ContextWrapper.java:248) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.content.ContextWrapper.startActivity(ContextWrapper.java:248) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at com.wissen.sms.receiver.SMSReceiver.onReceive(SMSReceiver.java:40) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  at android.app.ActivityThread.handleReceiver(ActivityThread.java:2637) 
08-31 10:44:38.031: ERROR/AndroidRuntime(749):  ... 10 more 

请指明发生问题的位置。

Answer 1

在清单中添加exported = true的答案是否应该由另一个应用程序（此处为系统）调用您的活动？

http://developer.android.com/guide/topics/manifest/receiver-element.html#exported

问候， 斯特凡