Android開發零點起飛(第七章)筆記-Activity抓取Service內的值

Android開發零點起飛(第七章)筆記-Activity抓取Service內的值

 

 

//MainActivity.java

package com.example.jashsample;

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;
import android.widget.LinearLayout;
import android.widget.Toast;
/*
 00.目的新增一個有Service功能的範例
 01.新增CountService
 02.新增interface ICountService
 03.在設定檔新增<service android:name ="CountService" >的區段 
 */
public class MainActivity extends Activity {
		private ServiceConnection serviceConnection = new ServiceConnection() {

	        @Override
	        public void onServiceConnected(ComponentName name, IBinder service) {
	            countService = (ICountService) service;
	            Log.v( " CountService " , " on serivce connected, count is " 
	                    + countService.getCount());
	        }

	        @Override
	        public void onServiceDisconnected(ComponentName name) {
	            countService = null ;
	        }

	    };
	    private ICountService countService;
	    private Button But1;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		LinearLayout ll = new LinearLayout(this); 
		ll.setOrientation(LinearLayout.VERTICAL);
		But1=new Button(this);
		But1.setText("Get");
		But1.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this,"Service的counter=" +countService.getCount(),Toast.LENGTH_LONG).show(); 
			}
		});
		ll.addView(But1);
		setContentView(ll);
		this.bindService( new Intent("com.example.jashsample.CountService"),this.serviceConnection, BIND_AUTO_CREATE);
	}
    @Override
    protected void onDestroy() {
    	this.unbindService(serviceConnection);//一定要在super.onDestroy();前面
        super.onDestroy();
    }
	@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;
	}

}

//ICountService.java

package com.example.jashsample;

publicinterface ICountService {
publicabstractint getCount();
}

//CountService.java

package com.example.jashsample;

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

public class CountService extends Service implements ICountService {

    private boolean threadDisable;

    private int count;

    private ServiceBinder serviceBinder = new ServiceBinder();

    public class ServiceBinder extends Binder implements ICountService{
        @Override
        public int getCount() {
            return count;

        }

    }

    @Override

    public IBinder onBind(Intent intent) {
        return serviceBinder;
    }

    @Override
    public void onCreate() {
        super .onCreate();
        new Thread( new Runnable() {

            @Override
            public void run() {
                while ( ! threadDisable) {
                    try {
                        Thread.sleep( 1000 );
                    } catch (InterruptedException e) {
                    }
                    count ++ ;
                    Log.v( " CountService " , " Count is " + count);
                }
            }
        }).start();
    }

    @Override
    public void onDestroy() {
        super .onDestroy();
        this .threadDisable = true ;
        Log.v( " CountService " , " on destroy " );
    }

    /* (non-Javadoc)
     * @see com.easymorse.ICountService#getCount()
     */ 
    public int getCount() {
        return count;
    }

}