简单demo诉说Service And Intentservice

前段时间做项目,用到service了,当时只是匆匆忙忙的用了,具体什么原理也不知道,项目上线了,终于有时间学习了,小菜鸟终于可以整理一下

根据程序来看一下service的生命周期(由于布局只有几个按钮,这里就不贴图了)

1.MainActivity.java

package com.sdufe.thea.guo;

import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {

	private Button button1, button2, button3, button4, button5, button6;
	private String TAG = "MainActivity";
	private ServiceConnection conn;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initView();
		conn = new ServiceConnection() {

			@Override
			public void onServiceDisconnected(ComponentName name) {
				Log.d(TAG, "onServiceDisconnected");
			}

			@Override
			public void onServiceConnected(ComponentName name, IBinder service) {
				Log.d(TAG, "onServiceConnected");
			}
		};
	}

	private void initView() {
		button1 = (Button) findViewById(R.id.button1);
		button2 = (Button) findViewById(R.id.button2);
		button3 = (Button) findViewById(R.id.button3);
		button4 = (Button) findViewById(R.id.button4);
		button5 = (Button) findViewById(R.id.button5);
		button6 = (Button) findViewById(R.id.button6);

		button1.setOnClickListener(this);
		button2.setOnClickListener(this);
		button3.setOnClickListener(this);
		button4.setOnClickListener(this);
		button5.setOnClickListener(this);
		button6.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		Intent intent = new Intent(MyService.ACTION);
		switch (v.getId()) {
		// 启动服务
		case R.id.button1:
			startService(intent);
			break;
		// 绑定服务
		case R.id.button2:
			bindService(intent, conn, BIND_AUTO_CREATE);
			break;
		// 解除服务
		case R.id.button3:
			unbindService(conn);
			break;
		// 结束服务
		case R.id.button4:
			stopService(intent);
			break;
		// myservice
		case R.id.button5:
			startService(new Intent(this, MyService.class));
			break;
		// myintentservice
		case R.id.button6:
			startService(new Intent(this, MyIntentService.class));
			break;
		}
	}

}

布局中存在六个button，其中前四个分别是测试service的生命周期的，最后两个测试service的，由于service不在单独的进程中，又不是线程,还有就是我们习惯性把耗时的操作放在service中,所以来测试一下service和intentService

2.MyService.java

package com.sdufe.thea.guo;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service {
	
	private String TAG="MyService";
	public static final String ACTION="com.sdufe.thea.guo.MyService";

	@Override
	public IBinder onBind(Intent intent) {
		Log.d(TAG, TAG+"onBind");
		return null;
	}
	
	@Override
	public void onCreate() {
		Log.d(TAG, TAG+"onCreate");
		super.onCreate();
	}
	
	@Override
	@Deprecated
	public void onStart(Intent intent, int startId) {
		Log.d(TAG, TAG+"onStart");
		try {
			Thread.sleep(3000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		Log.d(TAG, TAG+"睡眠结束");
		super.onStart(intent, startId);
	}
	
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Log.d(TAG, TAG+"onStartCommand");
		return super.onStartCommand(intent, flags, startId);
	}
	
	@Override
	public boolean onUnbind(Intent intent) {
		Log.d(TAG, TAG+"onUnbind");
		return super.onUnbind(intent);
	}
	
	@Override
	public void onDestroy() {
		Log.d(TAG, TAG+"onDestroy");
		super.onDestroy();
	}

}

在MyService中,主要写了service,为了测试service和IntentService,在OnStart中加入了一段代码,无关大雅,暂时先忽略

3.在AndroidManifest.xml给service注册一下

<service android:name="com.sdufe.thea.guo.MyService" >
            <intent-filter>
                <action android:name="com.sdufe.thea.guo.MyService" />
            </intent-filter>
        </service>

首先点击启动服务:

点击结束服务:

点击绑定服务:

结束服务:

注:服务都是成对出现

下面来说一下Service和IntentService,一般费时的操作会放在service,但是当时间长时,会出现Application Not Responding

下面呈上service和IntentService源码,一看就懂了

public abstract class Service extends ContextWrapper implements ComponentCallbacks2 {
    private static final String TAG = "Service";

    public Service() {
        super(null);
    }

}

public abstract class IntentService extends Service {
    private volatile Looper mServiceLooper;
    private volatile ServiceHandler mServiceHandler;
    private String mName;
    private boolean mRedelivery;

    private final class ServiceHandler extends Handler {
        public ServiceHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            onHandleIntent((Intent)msg.obj);
            stopSelf(msg.arg1);
        }
    }

}

瞄一眼源码应该就懂了,耗时比较长的还是用IntentService比较靠谱

很多时候服务和通知会一起用,这里也顺便写了写通知,代码如下:

package com.sdufe.thea.guo;

import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyIntentService extends IntentService {

	private String TAG = "MyIntentService";
	private NotificationManager notificationManager;

	public MyIntentService() {
		super("***");
	}

	@Override
	protected void onHandleIntent(Intent intent) {
		Log.d(TAG, TAG + "onStart");
		try {
			Thread.sleep(30000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		@SuppressWarnings("deprecation")
		Notification notification = new Notification(R.drawable.ic_launcher,
				"通知", System.currentTimeMillis());
		intent = new Intent(getApplicationContext(), SecondActivity.class);
		PendingIntent pendingIntent = PendingIntent.getActivity(
				getApplicationContext(), 0, intent, 0);
		notification.setLatestEventInfo(getApplicationContext(), "标题", "内容...",
				pendingIntent);
		notificationManager.notify(0, notification);
		Log.d(TAG, TAG + "睡眠结束");
	}
}

ok,差不多先分享这些

源码地址:http://download.csdn.net/detail/elinavampire/8115975