实训8 service服务
一、【实训目的】
(1) service的生命周期。
(2) 跨进程调用AIDLserver
二、【实训内容和步骤】
1、按下图写一个布局管理，使用Service原理并实现以下按键功能，
(1) service的生命周期。
(2) 跨进程调用AIDLserver
二、【实训内容和步骤】
1、按下图写一个布局管理，使用Service原理并实现以下按键功能，
二、【实训内容和步骤】
1、按下图写一个布局管理，使用Service原理并实现以下按键功能，
单击“启动Service”启动一个后台service,依次输出素数（时间间隔1秒）；
单击“停止Service”，停止后台service服务；
单击“绑定Service”，绑定后台service服务，依次输出素数（时间间隔1秒）；
单击“解绑Service”，解除绑定后台service服务；
单击“获取数据”，用弹出框显示当前service多线程运行到的最后一个素数。
1）写出Activity_main.xml中的代码：
2）写出Activity_main.xml中的代码：
import com.example.oldbaby.MyService.MyBinder;
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.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button start, stop,bind,unbind,getData;
private MyBinder myBinder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start = (Button) findViewById(R.id.start);
stop = (Button) findViewById(R.id.stop);
bind= (Button)findViewById(R.id.bind);
unbind= (Button)findViewById(R.id.unbind);
getData=(Button)findViewById(R.id.getData);
final Intent intent =new Intent();
intent.setAction("com.example.oldbaby.MyService");
start.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
startService(intent);
}
});
stop.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
stopService(intent);
}
});
bind.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
bindService(intent, conn, BIND_AUTO_CREATE);
}
});
unbind.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
unbindService(conn);
}
});
getData.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//弹出提示信息框类Toast的静态成员方法makeText
Toast.makeText(MainActivity.this, "获取到的数据为："+myBinder.getCount(), Toast.LENGTH_LONG).show();
}
});
}
private ServiceConnection conn=new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
System.out.println("ServiceConnection's onServiceDisconnected invoked!");
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
System.out.println("ServiceConnection's onServiceConnected invoked!");
myBinder=(MyBinder)service;
}
};
@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;
}
}
3）写出MyService.java中的代码：
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
public class MyService extends Service {
private int count=0;
private boolean flag=true;
private MyBinder myBinder = new MyBinder();
public class MyBinder extends Binder {
public MyBinder() {
System.out.println("MyBinder's constructor invoked!");
}
public int getCount(){
return count;
}
}
@Override
public IBinder onBind(Intent intent) {
System.out.println("服务已经绑定!");
return myBinder;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
System.out.println("后台进程创建!");
new Thread() {
public void run() {
int i,j;
int k=0,q=0;
int[] s=new int[100];
for(i=2;i<100;i++)
{ boolean haha=true;
for(j=2;j=s.length)
{
break;
}
}
}
while (flag) {
try {
Thread.sleep(500);
q++;
count=s[q];
System.out.println("count="+s[q]);
} catch (Exception ex) {
ex.printStackTrace();
// TODO: handle exception
}
}
}
}.start();
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
System.out.println("后台进程启动!");
return super.onStartCommand(intent, flags, startId);
}
@Override
public boolean onUnbind(Intent intent) {
System.out.println("后台进程解绑!");
return super.onUnbind(intent);
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
System.out.println("后台进程结束!");
flag=false;
super.onDestroy();
}
}
4)写出AndroidManifest.xml中的代码：
5）运行结果截图：
2、按下图写一个布局管理，使用AIDLserver原理，并实现以下按键功能，单击“获取信息”按钮，可以随机生成国家和对应的位置。国家和位置信息如下：
private String[] country = new String[] { "中国", "美国", "法国", "澳大利亚" };
private String[] positions = new String[] { "亚洲", "美洲", "欧洲", "澳洲" };
请完整的写出步骤：
1）写出AIDLServer的MyServer.java源代码:
import java.util.Random;
import iet.jxufe.cn.server.Song.Stub;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
public class MyService extends Service {
private String[] country = new String[] { "中国", "美国", "法国", "澳大利亚"};
private String[] positions = new String[] {"亚洲", "美洲", "欧洲", "澳洲" };
private boolean flag = true;
private String theCountry;
private String thePosition;
private SongBinder songBinder = new SongBinder();
public class SongBinder extends Stub {
public String getName() throws RemoteException {
return theCountry;
}
public String getAuthor() throws RemoteException {
return thePosition;
}
}
public void onCreate() {
new Thread() {
public void run() {
while (flag) {
try {
Thread.sleep(500);
Random rand = new Random();//随机数
int index = rand.nextInt(4);
theCountry=country[index];
thePosition=positions[index];
System.out.println("国家名为:" +theCountry );
System.out.println("所在位置为:" +thePosition);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}.start();
super.onCreate();
}
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return songBinder;
}
public void onDestroy() {
flag = false;
super.onDestroy();
}
}
2）写出Song.aidl源代码:
package iet.jxufe.cn.server;
interface Song{
String getName();
String getAuthor();
}
3）写出AIDLServer添加的清单源代码:
4）写出AIDLClient的MainActivity.java源代码:
import iet.jxufe.cn.server.Song;
import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private Button getData;
private EditText country, positions;
private Song songBinder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getData = (Button) findViewById(R.id.getData);
country = (EditText) findViewById(R.id.country);
positions = (EditText) findViewById(R.id.position);
final Intent intent = new Intent();
intent.setAction("iet.jxufe.cn.server.MyService");
getData.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
bindService(intent, conn, Service.BIND_AUTO_CREATE);
country.setText(songBinder.getName());
positions.setText(songBinder.getAuthor());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public ServiceConnection conn = new ServiceConnection() {
public void onServiceDisconnected(ComponentName name) {
}
public void onServiceConnected(ComponentName name, IBinder service) {
songBinder = Song.Stub.asInterface(service);
}
};
@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;
}
}
5）写出AIDLClient的布局文件源代码:
6) 写出AIDLClient的String.xml源代码:
AIDLClient Settings 获取其它应用信息 国家名为: 所在位置为:
运行结果截图：
附注：该专栏是博主上学时的实训项目，可供访客练习与参考。代码质量不是很好，但能实现，仅供参考！
