Android通过AIDL远程调用service

AIDL的作用

AIDL (Android Interface Definition Language) 是一种IDL 语言，用于生成可以在Android设备上两个进程之间进行进程间通信(interprocess communication, IPC)的代码。如果在一个进程中（例如Activity）要调用另一个进程中（例如Service）对象的操作，就可以使用AIDL生成可序列化的参数。

AIDL IPC机制是面向接口的，像COM或Corba一样，但是更加轻量级。它是使用代理类在客户端和实现端传递数据。

实现的简单列子

下面小编写了一个简单登录

1.MainActivity.xml

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="MyQQ登录"
android:textSize="30sp"
android:gravity="center"
/>

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入MyQQ号："
android:inputType="number"
android:id="@+id/et_main_num"

/>

<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入MyQQ密码："
android:inputType="numberPassword"
android:id="@+id/et_main_pass"

/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录"
android:onClick="login"
/>

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="结果："
android:id="@+id/tv_main_result"
android:textSize="25sp"
/>

2.QQUser.java

public class QQUser implements Parcelable{
private String num;
private String pass;
private String netName;
private String address;
private String sex;
private String age;

public QQUser() {
}

public QQUser(String num, String pass, String netName, String address, String sex, String age) {
this.num = num;
this.pass = pass;
this.netName = netName;
this.address = address;
this.sex = sex;
this.age = age;
}

protected QQUser(Parcel in) {
num = in.readString();
pass = in.readString();
netName = in.readString();
address = in.readString();
sex = in.readString();
age = in.readString();
}

public static final Creator<QQUser> CREATOR = new Creator<QQUser>() {
@Override
public QQUser createFromParcel(Parcel in) {
return new QQUser(in);
}

@Override
public QQUser[] newArray(int size) {
return new QQUser[size];
}
};

public String getNum() {
return num;
}

public void setNum(String num) {
this.num = num;
}

public String getPass() {
return pass;
}

public void setPass(String pass) {
this.pass = pass;
}

public String getNetName() {
return netName;
}

public void setNetName(String netName) {
this.netName = netName;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

public String getSex() {
return sex;
}

public void setSex(String sex) {
this.sex = sex;
}

public String getAge() {
return age;
}

public void setAge(String age) {
this.age = age;
}

@Override
public int describeContents() {
return 0;
}

@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(num);
parcel.writeString(pass);
parcel.writeString(netName);
parcel.writeString(address);
parcel.writeString(sex);
parcel.writeString(age);
}
}

3.MyQQLoginService.java

public class MyQQLoginService extends Service {

class MyIBinder extends QQLoginOut.Stub{
@Override
public boolean login(String num, String pass) throws RemoteException {
if("admin".equals(num)&&"123456".equals(pass)){
return true;
}else{
return false;
}
}

@Override
public QQUser loginGetUser(Map map) throws RemoteException {

String num=map.get("num").toString();
String pass=map.get("pass").toString();
if("5201314".equals(num)&&"123456".equals(pass)){
return new QQUser(num,pass,"vampire","湖南","女","18");
}else{
return null;
}
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
Log.i("test","onBind");
return new MyIBinder();
}
}

4.AndroidManifest.xml

<service android:name=".MyQQLoginService"
android:exported="true"
android:enabled="true"
>
</service>

5.QQUserOut.aidl

package com.zking.android25_myqq;

//定义QQUser
parcelable QQUser;

6.QQLoginOut.aidl

package com.zking.android25_myqq;
import  com.zking.myqq.QQUserOut;
interface QQLoginOut {
boolean login(String num,String pass);
QQUser loginGetUser(in Map map);
}

7.MainActivity.java

public class MainActivity extends AppCompatActivity {

private EditText et_main_num;
private EditText et_main_pass;
private TextView tv_main_result;
private Intent intent;
private QQLoginOut qqLoginOut;

//初始化ServiceConnection
ServiceConnection connection=new ServiceConnection() {

@Override
public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
Log.i("test","连接成功");

qqLoginOut = QQLoginOut.Stub.asInterface(iBinder);

}

@Override
public void onServiceDisconnected(ComponentName componentName) {
Log.i("test","连接失败");
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initviews();
intent = new Intent(this,MyQQLoginService.class);
}

@Override
protected void onResume() {
super.onResume();
//绑定服务
bindService(intent,connection, Service.BIND_AUTO_CREATE);
}

@Override
protected void onDestroy() {
super.onDestroy();
//和服务解除绑定
unbindService(connection);
}

private void initviews() {
et_main_num = (EditText) findViewById(R.id.et_main_num);
et_main_pass = (EditText) findViewById(R.id.et_main_pass);
tv_main_result = (TextView) findViewById(R.id.tv_main_result);
}

public void login(View view){
String num=et_main_num.getText().toString();
String pass=et_main_pass.getText().toString();
//连接后台
boolean b= false;
try {

Map map=new HashMap();
map.put("num",num);
map.put("pass",pass);
QQUser qqUser= qqLoginOut.loginGetUser(map);
if(qqUser!=null){
tv_main_result.setText("雷好："+qqUser.getNetName()+" 年芳："+qqUser.getAge()+" 性别："+qqUser.getSex());
}else{
tv_main_result.setText("用户名或密码错误");
}
} catch (RemoteException e) {
e.printStackTrace();
}

}
}