activity启动service的两种方式

1.startService()
2.onbind()

1.测试主页面

package com.example.lab4;import android.os.Bundle;import com.example.model.Book;import com.example.service.BookService;import android.app.Activity;import android.content.Intent;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn1 = (Button)findViewById(R.id.btn1);        Button btn2 = (Button)findViewById(R.id.btn2);        Button btn3 = (Button)findViewById(R.id.btn3);        btn1.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                //通过start启动                 Toast.makeText(MainActivity.this, "fdsfsd", 1000).show();                Intent intent = new Intent(MainActivity.this,BookService.class);                Book book = new Book ();                book.setBookname("陈世滔的书");                book.setAuthor("陈世滔");                intent.putExtra("book", book);                startService(intent);            }        });        btn2.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(MainActivity.this,BookService.class);                stopService(intent);            }        });        btn3.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(MainActivity.this,GetServiceActivity.class);                startActivity(intent);            }        });    }    @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;    }}

2.从主页面中启动activity2并将其与service绑定

package com.example.lab4;import com.example.model.Book;import com.example.service.BookService;import android.app.Activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.view.Menu;import android.widget.TextView;public class GetServiceActivity extends Activity{    private BookService bookservice;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.service_activity);        //与service 绑定        Intent intent = new Intent(GetServiceActivity.this,BookService.class);        Book book = new Book ();        book.setBookname("陈世滔的书");        book.setAuthor("陈世滔");        intent.putExtra("book", book);        bindService(intent, conn, Context.BIND_AUTO_CREATE);        TextView textview = (TextView)findViewById(R.id.text);        textview.setText("绑定service服务");    }    private ServiceConnection conn = new ServiceConnection() {            /** 获取服务对象时的操作 */            public void onServiceConnected(ComponentName name, IBinder service) {                // TODO Auto-generated method stub               bookservice = ((BookService.ServiceBinder) service).getService();            }            /** 无法获取到服务对象时的操作 */            public void onServiceDisconnected(ComponentName name) {                // TODO Auto-generated method stub                bookservice = null;            }        };    @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;    }    @Override    protected void onDestroy() {        unbindService(conn);        super.onDestroy();    }}

3.服务程序

package com.example.service;import com.example.model.Book;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.Bundle;import android.os.IBinder;import android.util.Log;public class BookService extends Service {    boolean threadDisable;    private int count;    private Book book;    public void onCreate()     {        Log.i("oncreate", "bookservice already created");        super.onCreate();        /** 创建一个线程，每秒计数器加一，并在控制台进行Log输出 */        new Thread(new Runnable() {            public void run() {                while (!threadDisable) {                    try {                        Thread.sleep(1000);                    } catch (InterruptedException e) {                    }                    count++;                    Log.v("CountService", "Count is" + count+"bookname id"+book.getBookname());                }            }        }).start();    };    @Override    public IBinder onBind(Intent intent) {        book = intent.getParcelableExtra("book");        Log.i("onbind", "bookservice already onbind");        return null;    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        Log.i("onstartCommand", "bookservice already onstartcommand");        book = intent.getParcelableExtra("book");        return super.onStartCommand(intent, flags, startId);        }    @Override    public boolean onUnbind(Intent intent) {        Log.i("onunbind", "bookservice already onunbind");        return super.onUnbind(intent);    }    @Override    public void onDestroy() {        this.threadDisable=true;        Log.i("ondestory", "bookservice already ondestory");        super.onDestroy();    }    //此方法是为了可以在Acitity中获得服务的实例       public class ServiceBinder extends Binder {            public BookService getService() {                return BookService.this;            }        }    public Book getBook() {        return book;    }    public void setBook(Book book) {        this.book = book;    }}

4.book.java 通过Parcelable的方式传递数据

package com.example.model;import android.os.Parcel;import android.os.Parcelable;public class Book implements Parcelable{    private String bookname;    private String author;    public String getBookname() {        return bookname;    }    public void setBookname(String bookname) {        this.bookname = bookname;    }    public String getAuthor() {        return author;    }    public void setAuthor(String author) {        this.author = author;    }    @Override    public int describeContents() {        return 0;    }    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeString(bookname);        dest.writeString(author);    }    public Book(){}    public Book(Parcel in)    {        this.bookname = in.readString();        this.author = in.readString();    }    public static final Parcelable.Creator<Book> CREATOR = new Parcelable.Creator<Book>() {          @Override          public Book createFromParcel(Parcel source) {              return new Book(source);          }          @Override          public Book[] newArray(int size) {              return new Book[size];          }      };}

5.总结
5.1通过startService启动Service 时顺序为
onCreate()->onStartCommand()

5.2通过onbind启动service时启动顺序为
oncreate()->onBind()

5.3 stop关闭service时，关闭顺序为
直接执行ondestory()

5.4 unbind关闭时，关闭比顺序为
onbind()->ondestory()