Android实现系统重新启动的功能

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hzhi.restart"
    android:versioncode="1"
    android:versionname="1.0"
    android:installlocation="preferexternal"
    android:shareduserid="android.uid.system">

    <uses-sdk
        android:minsdkversion="8"
        android:targetsdkversion="17" />

    <application
        android:allowbackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/apptheme" >
        <activity
            android:name="com.hzhi.restart.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>
    </application>

</manifest>

package com.hzhi.restart;

import android.os.bundle;
import android.app.activity;
import android.content.intent;
import android.view.menu;
import android.view.view;

public class mainactivity extends activity {

    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);
    }

    @override
    public boolean oncreateoptionsmenu(menu menu) {
        // inflate the menu; this adds items to the action bar if it is present.
        getmenuinflater().inflate(r.menu.main, menu);
        return true;
    }

    public void click(view view){

        intent intent = new intent();
        intent.setaction(intent.action_reboot);
        intent.putextra("nowait", 1);
        intent.putextra("interval", 1);
        intent.putextra("starttime", 1);
        intent.putextra("window", 0);
        sendbroadcast(intent);

    }

}