详解Android中AIDL的使用

public class Book implements Parcelable {
 
    private String name;
 
    public Book(String name) {
        this.name=name;
    }
 
    protected Book(Parcel in) {
        this.name = in.readString();
    }
 
    public static final Creator<Book> CREATOR = new Creator<Book>() {
        @Override
        public Book createFromParcel(Parcel in) {
            return new Book(in);
        }
 
        @Override
        public Book[] newArray(int size) {
            return new Book[size];
        }
    };
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    @Override
    public int describeContents() {
        return 0;
    }
 
    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(name);
    }
 
    
    public void readFromParcel(Parcel dest){
        name=dest.readString();
    }
}

package com.example.service;
 
import com.example.service.Book;
 
// Declare any non-default types here with import statements
 
interface BookController {
 
    int getInt();//int类型
    String getString();//String类型
    List<Book> getBookList();//aidl对象
    void addBook(inout Book book);//aidl对象
 
}

public class AIDLService extends Service {
 
    private List<Book> bookList;
 
    public AIDLService() {
 
    }
 
    @Override
    public void onCreate() {
        super.onCreate();
        bookList = new ArrayList<>();
        initData();
    }
 
    private void initData() {
        Book book1 = new Book("花千骨");
        Book book2 = new Book("公主小妹");
        Book book3 = new Book("仙剑奇侠传");
        Book book4 = new Book("飘");
        Book book5 = new Book("茶花女");
        Book book6 = new Book("解忧杂货铺");
        Book book7 = new Book("活着");
        Book book8 = new Book("三生三世十里桃花");
        bookList.add(book1);
        bookList.add(book2);
        bookList.add(book3);
        bookList.add(book4);
        bookList.add(book5);
        bookList.add(book6);
        bookList.add(book7);
        bookList.add(book8);
    }
 
    private final BookController.Stub stub = new BookController.Stub() {
        @Override
        public int getInt() throws RemoteException {
            return bookList == null ? 0 : bookList.size();
        }
 
        @Override
        public String getString() throws RemoteException {
            return bookList == null ? "" : bookList.get(0).getName();
        }
 
        @Override
        public List<Book> getBookList() throws RemoteException {
            return bookList;
        }
 
        @Override
        public void addBook(Book book) throws RemoteException {
            if (book != null) {
                bookList.add(book);
            } else {
                Log.i("ruxing", "接收到了一个空对象 Inout");
            }
        }
    };
 
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return stub;
    }
}

  <service android:name=".AIDLService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.example.service.action"/>
                <cateGory android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
        </service>

public class MainActivity extends AppCompatActivity {
 
    private BookController bookController;
    private boolean connected;
    private List<Book> bookList;
 
    private Button mBtnGetBookList;
    private Button mBtnAddBook;
    private Button mBtnGetBookSize;
    private Button mBtnGetFirstBookName;
 
    private ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            bookController = BookController.Stub.asInterface(service);
            connected = true;
        }
 
        @Override
        public void onServiceDisconnected(ComponentName name) {
            bookController = null;
            connected = false;
        }
    };
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mBtnGetBookList = findViewById(R.id.btn_get_book_list);
        mBtnAddBook = findViewById(R.id.btn_add);
        mBtnGetBookSize = findViewById(R.id.btn_get_book_size);
        mBtnGetFirstBookName = findViewById(R.id.btn_first_book_name);
 
        mBtnGetBookList.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (connected) {
                    try {
                        bookList = bookController.getBookList();
                        for (int i = 0; i < bookList.size(); i++) {
                            Log.i("ruxing", "name=" + bookList.get(i).getName());
                        }
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        mBtnAddBook.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (connected) {
                    Book book = new Book("新书");
                    try {
                        bookController.addBook(book);
                        Log.i("ruxing", "向服务器添加了一本新书==="+book.getName());
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        mBtnGetBookSize.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (connected) {
                    try {
                        int size = 0;
                        size = bookController.getInt();
                        Log.i("ruxing", "共有" + size + "本书");
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        mBtnGetFirstBookName.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (connected) {
                    try {
                        String name = bookController.getString();
                        Log.i("ruxing", "第一本书的书名是：" + name);
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
 
        Intent intent = new Intent();
        intent.setPackage("com.example.service");
        intent.setAction("com.example.service.action");
        bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
 
    }
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (connected) {
            unbindService(serviceConnection);
        }
    }
}