android.permission.RECEIVE_BOOT_COMPLETED does not launch activity at boot

I have a BootUpReceiver class which I'm attempting to use with RECEIVE_BOOT_COMPLETED to launch an Activity when the device boots. The problem is - it does not seem to do so when I launch the app then restart the device.

I have verified there is no issue running Activity1.java - the issue lies either in the Manifest or the BootUpReceiver class but I'm not sure exactly why it will not launch after rebooting.

BootUpReceiver.java:

public class BootUpReceiver extends BroadcastReceiver{


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

     Intent i = new Intent(context, Activity1.class); 
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i); 

 }
}



<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.com.idg.voiscphone"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.idg.voiscphone.Activity1"
            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="com.idg.voiscphone.Activity2"
            android:label="@string/app_name" >
        </activity>
          <activity
            android:name="com.idg.voiscphone.Activity3"
            android:label="@string/app_name" >
        </activity>
              <activity
            android:name="com.idg.voiscphone.Activity3a"
            android:label="@string/app_name" >
        </activity>
              <activity
            android:name="com.idg.voiscphone.Activity3b"
            android:label="@string/app_name" >
        </activity>
       <receiver android:enabled="true" android:name=".BootUpReceiver"
        android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </receiver>
    </application>

</manifest>

Example Source:

http://androidrocksonmobility.blogspot.com/2012/01/how-to-create-auto-start-android.html

Copyright Notice：Content Author:「Droidzilla」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/20763380/android-permission-receive-boot-completed-does-not-launch-activity-at-boot