如何简单的开机自启动为什么不行

怎么简单的开机自启动为什么不行?
想学习开机自启动编程,编了一个开机自动显示一简单窗体的程序,编译运行正常,但就是不开机自启动,哪位高手帮查查问题。下面是程序清单：
//===================Auto1Activity.java=======================
package your.package0.namespace;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class Auto1Activity extends Activity implements OnClickListener
{int i;
 TextView tv1;
 Button btn1;
 @Override
 public void onCreate(Bundle savedInstanceState)
 {super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  i=0;
  btn1=(Button)findViewById(R.id.button1);
  tv1=(TextView)findViewById(R.id.tv);
  btn1.setOnClickListener((OnClickListener) this);
  }
 public void onClick(View v){i+=1;tv1.setText(Integer.toString(i));}
}
//=================BootReceiver.java=========================
package your.package0.namespace;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BootReceiver extends BroadcastReceiver
{@Override  
 public void onReceive(Context ctx, Intent intent)
{String action="android.intent.action.MAIN";  
 String category="android.intent.category.LAUNCHER";  
 Intent myin=new Intent(ctx,Auto1Activity.class);  
 myin.setAction(action);
 myin.addCategory(category);  
 myin.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
 ctx.startActivity(myin);  
 }
}
//==================AndroidManifest.xml=========================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="your.package0.namespace"
  android:versionCode="1"
  android:versionName="1.0" >

  <uses-sdk android:minSdkVersion="7" />
  <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
  <receiver android:name=".BootReceiver">
  <intent-filter>
  <action android:name="android.intent.action.BOOT_COMPLETED">
  <category android:name="android.intent.category.LAUNCHER" />
  </action>
  </intent-filter>
  </receiver>  
   
  <application
  android:icon="@drawable/ic_launcher"
  android:label="@string/app_name" >
  <activity
  android:name=".Auto1Activity"
  android:label="@string/app_name" >
  <intent-filter>
  <action android:name="android.intent.action.MAIN" />
  <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
  </activity>
  </application>

</manifest>


[解决办法]
有时间试试