android开机启动一个Service实例

最新推荐文章于 2021-05-26 18:24:00 发布

最新推荐文章于 2021-05-26 18:24:00 发布 · 232 阅读

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本文介绍了一个简单的Android开机启动Service的实现方法。通过自定义BroadcastReceiver监听开机完成事件，并启动指定Service，该Service还包含了电池状态监测及LED控制等功能。

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android开机启动一个Service研究一下其实也蛮简单，下面直接看代码吧。

package com.test.kevin;


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

public class BootBroadcastReveiver extends BroadcastReceiver {
	private static final String TAG = "BootBroadcastReveiver";

	@Override
	public void onReceive(Context context, Intent intent) {
		if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
			Intent bootServiceIntent = new Intent(context, MainActivity.class);
			context.startService(bootServiceIntent);
			Log.d(TAG, "--------Boot start service-------------");
		}
	}
}

package com.test.kevin;

import java.util.Timer;
import java.util.TimerTask;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.util.Log;

public class MainService extends Service {
	private static final String TAG = "MainService";
	private final int CLOSE_ALERTDIALOG = 0;
	private int timecount = 0;
	private int batteryValue = 0;

	@Override
	public IBinder onBind(Intent intent) {
		Log.d(TAG, "----onBind-----");
		return null;
	}

	@Override
	public void onCreate() {
		Log.d(TAG, "---------onCreate--------");
		registerReceiver(batteryChangedReceiver, new IntentFilter(
				Intent.ACTION_BATTERY_CHANGED));
		delayCloseController.timer.schedule(delayCloseController, 1500, 1000);
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		// TODO Auto-generated method stub
		return super.onStartCommand(intent, flags, startId);
	}

    private BroadcastReceiver batteryChangedReceiver = new BroadcastReceiver() {   
        @Override   
        public void onReceive(Context context, Intent intent) {   
  
            if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {   
                int level = intent.getIntExtra("level", 0);   
                int scale = intent.getIntExtra("scale", 100);   
                Log.d(TAG, "----------level---" + level);   
                Log.d(TAG, "----------scale---" + scale);   
                Log.d(TAG, "----------Total---" + level * 100 / scale + "%");   
                batteryValue = level * 100 / scale;   
            }   
        }   
  
    };   

    private Handler mHandler = new Handler() {   
        @Override   
        public void handleMessage(Message msg) {   
            switch (msg.what) {   
            case CLOSE_ALERTDIALOG: {   
                if (timecount % 2 == 1) {   
                    if (batteryValue <= 15) {   
                        onPowerLed();   
                        try {   
                            Thread.sleep(300);   
                        } catch (InterruptedException e) {   
                            // TODO Auto-generated catch block   
                            e.printStackTrace();   
                        }   
                        offPowerLed();   
                        Log.d(TAG, "------PowerLed------");   
                    }   
                } else {   
                    onWorkLed();   
                    try {   
                        Thread.sleep(300);   
                    } catch (InterruptedException e) {   
                        // TODO Auto-generated catch block   
                        e.printStackTrace();   
                    }   
                    offWorkLed();   
                    Log.d(TAG, "------WorkLed------");   
                }   
            }   
                timecount++;   
                break;   
            default:   
                break;   
            }   
        }   
    };   
  
    private class DelayCloseController extends TimerTask {   
        private Timer timer = new Timer();   
  
        @Override   
        public void run() {   
            Message messageFinish = new Message();   
            messageFinish.what = CLOSE_ALERTDIALOG;   
            mHandler.sendMessage(messageFinish);   
        }   
    }   
  
    private DelayCloseController delayCloseController = new DelayCloseController();   
  
  
	public void onPowerLed(){
		Log.d(TAG, "------------onPowerLed-------------");
	};

	public void offPowerLed(){
		Log.d(TAG, "------------offPowerLed-------------");
	};

	public void onWorkLed(){
		Log.d(TAG, "------------onWorkLed-------------");
	};

	public void offWorkLed(){
		Log.d(TAG, "------------offWorkLed-------------");
	};

}

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


	<application android:icon="@drawable/icon" android:label="@string/app_name">
		<service android:name=".MainService" />

		<receiver android:name=".BootBroadcastReveiver">
			<intent-filter>
				<action android:name="android.intent.action.BOOT_COMPLETED"></action>
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</receiver>

	</application>
	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
</manifest>

把以上代码一个小小Service实例，重启机子后可以直接远行.