访问本地服务里面的方法

原理图：

步骤：

调用服务里面的方法：
1 设计一个接口：IStudentQueryService   Student queryStudent(int no);
2 在activity里面进行绑定操作：
  bindService(intent,conn,flag);
3 写一个连接实现类：
    private final class MyServiceConnection implements ServiceConnection{


public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
ibinder = (IStudnetQueryService) service;
}


public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
conn = null;
ibinder = null;
}
   
    }
4 在activity里面用IStudentQueryService 来接收onServiceConnected(ComponentName name, IBinder service)
  返回过来的IBinder对象。


5 写一个StudentService  extends  Service  ,重写onBind()
  编译一个内部类StudentBinder extends Binder  implements IStudnetQueryService


6  创建StudentBinder的对象，通过onBind()方法返回。
7  在activity通过onBind()返回的对象调用服务里面的方法。

代码如下：

1、main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >        <TextView         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="学号"        />        <EditText         android:id="@+id/et_no"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:inputType="number"        />        <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="查询"        android:onClick="query1"        />        <TextView          android:id="@+id/tv_info"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        />    </LinearLayout>

2、MainActivity

package com.njupt.studentquery1;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.view.Menu;import android.view.View;import android.widget.EditText;import android.widget.TextView;public class MainActivity extends Activity {private EditText et_no;private TextView tv_info;private MyServiceConnection conn;private IStudentQueryService ibinder;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);    et_no = (EditText) findViewById(R.id.et_no);tv_info = (TextView) findViewById(R.id.tv_info);conn = new MyServiceConnection();Intent intent = new Intent(this,StudentService.class);bindService(intent,conn,BIND_AUTO_CREATE);}private class MyServiceConnection implements ServiceConnection{@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {ibinder = (IStudentQueryService) service;}@Overridepublic void onServiceDisconnected(ComponentName name) {ibinder = null;conn = null;}}@Overrideprotected void onDestroy() {super.onDestroy();    unbindService(conn);}public void query1(View v){String no = et_no.getText().toString();Student student = ibinder.queryStudent(Integer.parseInt(no));tv_info.setText(student.toString());}@Overridepublic 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;}}

3、StudentService

package com.njupt.studentquery1;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;public class StudentService extends Service {private StudentBinder ibinder = new StudentBinder();private Student[] students = new Student[]{new Student(1,"章泽天",21),new Student(2,"刘诗诗",22),new Student(3,"allen",21)};@Overridepublic IBinder onBind(Intent intent) {return ibinder;}private class StudentBinder extends Binder implements IStudentQueryService{public Student queryStudent(int no){return query(no);}}public Student query(int no){return students[no - 1];}}

4、IStudentQueryService

package com.njupt.studentquery1;public interface IStudentQueryService {public Student queryStudent(int no);}

5、Student

package com.njupt.studentquery1;public class Student {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public Student(int id, String name, int age) {super();this.id = id;this.name = name;this.age = age;}public Student() {super();}@Overridepublic String toString() {return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";}}

6、AndroidManifest.xml

记得在清单文件中吧service 给注册上去

<service android:name="com.njupt.studentquery1.StudentService"/>