android-BroadcastReceiver 系统开机广播

1，监听系统开机广播android.intent.action.BOOT_COMPLETED

2，访问系统开机事件的权限android.permission.RECEIVE_BOOT_COMPLETED"

程序效果：开机的时候，显示出当前的时间段，上午，中午，下午，晚上，在Toast中显示。

manifest

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

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".C49_BroadcastToastActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".MyBroadcast">
            <intent-filter >
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>
    </application>
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

</manifest>

主activity

package com.song;
/*
 * 开机的广播,Android.intent.action.BOOT_COMPLETE
 * 开机的时候，显示出当前的时间段，上午，中午，下午，晚上
 * Toast中显示
 */
import android.app.Activity;
import android.os.Bundle;

public class C49_BroadcastToastActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

receiver

package com.song;

import java.util.Calendar;

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

public class MyBroadcast extends BroadcastReceiver{
    Calendar c;
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		c=Calendar.getInstance();
		int hour=c.get(Calendar.HOUR_OF_DAY);
		if(hour>=0&&hour<=10)
		{
			Toast.makeText(context, "上午", Toast.LENGTH_LONG).show();
		}
		if(hour>10&&hour<13)
		{
			Toast.makeText(context, "中午", Toast.LENGTH_LONG).show();
		}
		if(hour>=13&&hour<=18)
		{
			Toast.makeText(context, "下午", Toast.LENGTH_LONG).show();
		}
		if(hour>18&&hour<24)
		{
			Toast.makeText(context, "晚上", Toast.LENGTH_LONG).show();
		}
		System.out.println("hour"+c.get(Calendar.HOUR_OF_DAY));
	}

}