Android 中的 Service 三种启动方式

1.start Service 不会随着activity finish 而关闭，必须调用 stop方法

每次调用都会调用onstart方法

package com.weidingqiang.customnetroid;

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

import java.util.ArrayList;
import java.util.List;

public class StartService extends Service {

private static final String TAG = StartService.class.getSimpleName();

public StartService() {
Log.d(TAG,"StartService()");
}

@Override
public void onCreate() {
super.onCreate();
Log.d(TAG, "onCreate()");
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG,"onStartCommand()");

Bundle bundle = intent.getBundleExtra("bundle");

int flag = bundle.getInt("Flag", 0);

switch (flag)
{
case 0:
Log.d(TAG, "onStartCommand()  --  0");

List<SDownVO> list = (List<SDownVO>) bundle.getSerializable("start1");
list.size();
break;
case 1:
ArrayList<PDownVO> list1 =   bundle.getParcelableArrayList("start2");
list1.size();
Log.d(TAG,"onStartCommand()  --  1");
break;
}

return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
Log.d(TAG,"onDestroy()");
super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
Log.d(TAG,"onBind()");
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
}

package com.weidingqiang.customnetroid;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class StartActivity extends AppCompatActivity implements View.OnClickListener{

private Button start,start1,start2,end;

private Intent intent;

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

start = (Button) this.findViewById(R.id.start);
start1 = (Button) this.findViewById(R.id.start1);
start2 = (Button) this.findViewById(R.id.start2);
end = (Button) this.findViewById(R.id.end);

start.setOnClickListener(this);
start1.setOnClickListener(this);
start2.setOnClickListener(this);
end.setOnClickListener(this);

intent = new Intent(this,StartService.class);
}

@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start:

List<SDownVO> list = new ArrayList<SDownVO>();
list.add(new SDownVO("www.baidu.com", "百度", false, 100));

Bundle bundle = new Bundle();
bundle.putInt("Flag", 0);
bundle.putSerializable("start1", (Serializable) list);

intent.putExtra("bundle",bundle);

startService(intent);
break;
case R.id.start1:
ArrayList<PDownVO> list1 = new ArrayList<PDownVO>();
list1.add(new PDownVO("www.baidu.com", "百度", false, 100));

Bundle bundle1 = new Bundle();
bundle1.putInt("Flag", 1);
bundle1.putParcelableArrayList("start2", list1);
intent.putExtra("bundle",bundle1);

startService(intent);
break;
case R.id.start2:
finish();
break;
case R.id.end:
stopService(intent);
break;
}
}

@Override
protected void onStop() {
super.onStop();
stopService(intent);
}

}

2Bind 方法

此方式会随着activity关闭 而关闭

package com.weidingqiang.customnetroid;

import android.app.ActivityManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.util.List;

public class BindActivity extends AppCompatActivity implements View.OnClickListener{

private Button start,start1,start2,end;

private Intent intent;

private ServiceConnection serviceConnection;

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

start = (Button) this.findViewById(R.id.start);
start1 = (Button) this.findViewById(R.id.start1);
start2 = (Button) this.findViewById(R.id.start2);
end = (Button) this.findViewById(R.id.end);

start.setOnClickListener(this);
start1.setOnClickListener(this);
start2.setOnClickListener(this);
end.setOnClickListener(this);

intent = new Intent(this,BindService.class);

serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {

}

@Override
public void onServiceDisconnected(ComponentName name) {

}
};
}

@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start:
bindService(intent, serviceConnection,Context.BIND_AUTO_CREATE);
break;
case R.id.start1:
Intent intent2 = new Intent(this,StartBindActivity.class);
startActivity(intent2);
finish();
break;
case R.id.start2:
finish();
break;
case R.id.end:

break;
}
}

@Override
protected void onStop() {

super.onStop();
}

@Override
protected void onDestroy() {
if(isServiceRunning(this,"BindService"))
{
unbindService(serviceConnection);
}

super.onDestroy();
}

/**
* 用来判断服务是否运行.
* @param mContext
* @param className 判断的服务名字
* @return true 在运行 false 不在运行
*/
public static boolean isServiceRunning(Context mContext,String className) {
boolean isRunning = false;
ActivityManager activityManager = (ActivityManager)
mContext.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningServiceInfo> serviceList
= activityManager.getRunningServices(30);
if (!(serviceList.size()>0)) {
return false;
}
for (int i=0; i<serviceList.size(); i++) {
if (serviceList.get(i).service.getClassName().equals(className) == true) {
isRunning = true;
break;
}
}
return isRunning;
}
}

package com.weidingqiang.customnetroid;

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

public class BindService extends Service {

private static final String TAG = BindService.class.getSimpleName();

/**
* 在 BindService 中我们直接继承 Binder 而不是 IBinder,因为 Binder 实现了 IBinder 接口，这样我们可以少做很多工作。
*/
public class SimpleBinder extends Binder{
/**
* 获取 Service 实例
* @return
*/
public BindService getService(){
return BindService.this;
}

public int add(int a, int b){
return a + b;
}
}

public SimpleBinder sBinder;

public BindService() {
}

@Override
public void onCreate() {
super.onCreate();

Log.d(TAG,"onCreate()");

// 创建 SimpleBinder
sBinder = new SimpleBinder();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG,"onStartCommand()");
return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
Log.d(TAG,"onDestroy()");
super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
// 返回 SimpleBinder 对象
return sBinder;
}

}

3.start and bind

package com.weidingqiang.customnetroid;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class StartBindActivity extends AppCompatActivity implements View.OnClickListener{

private static final String TAG = StartBindActivity.class.getSimpleName();

private Button start,start1,start2,end;

private Intent intent;

private ServiceConnection serviceConnection;

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

start = (Button) this.findViewById(R.id.start);
start1 = (Button) this.findViewById(R.id.start1);
start2 = (Button) this.findViewById(R.id.start2);
end = (Button) this.findViewById(R.id.end);

start.setOnClickListener(this);
start1.setOnClickListener(this);
start2.setOnClickListener(this);
end.setOnClickListener(this);

intent = new Intent(this,StartBindService.class);

serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
StartBindService.SimpleBinder sBinder = (StartBindService.SimpleBinder)service;
Log.v(TAG, "3 + 5 = " + sBinder.add(3, 5));
Log.v(TAG, sBinder.getService().toString());
}

@Override
public void onServiceDisconnected(ComponentName name) {

}
};
}

@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start:
startService(intent);
bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
break;
case R.id.start1:
startService(intent);
break;
case R.id.start2:
Intent intent2 = new Intent(this,BindActivity.class);
startActivity(intent2);
finish();
break;
case R.id.end:
stopService(intent);
break;
}
}

@Override
protected void onDestroy() {
super.onDestroy();
unbindService(serviceConnection);
}
}

package com.weidingqiang.customnetroid;

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

import java.util.ArrayList;
import java.util.List;

public class StartBindService extends Service {
private static final String TAG = StartBindService.class.getSimpleName();

/**
* 在 BindService 中我们直接继承 Binder 而不是 IBinder,因为 Binder 实现了 IBinder 接口，这样我们可以少做很多工作。
*/
public class SimpleBinder extends Binder {
/**
* 获取 Service 实例
* @return
*/
public StartBindService getService(){
return StartBindService.this;
}

public int add(int a, int b){
return a + b;
}
}

public SimpleBinder sBinder;

public StartBindService() {
}

@Override
public void onCreate() {
super.onCreate();

Log.d(TAG, "onCreate()");

// 创建 SimpleBinder
sBinder = new SimpleBinder();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG,"onStartCommand()");
return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
Log.d(TAG,"onDestroy()");
super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
// 返回 SimpleBinder 对象
return sBinder;
}
}