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Android example source code file (ServiceManagerNative.java)

This example Android source code file (ServiceManagerNative.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

ibinder, ipermissioncontroller, iservicemanager, parcel, remoteexception, servicemanagernative, servicemanagerproxy, string

The ServiceManagerNative.java Android example source code

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.os;


/**
 * Native implementation of the service manager.  Most clients will only
 * care about getDefault() and possibly asInterface().
 * @hide
 */
public abstract class ServiceManagerNative extends Binder implements IServiceManager
{
    /**
     * Cast a Binder object into a service manager interface, generating
     * a proxy if needed.
     */
    static public IServiceManager asInterface(IBinder obj)
    {
        if (obj == null) {
            return null;
        }
        IServiceManager in =
            (IServiceManager)obj.queryLocalInterface(descriptor);
        if (in != null) {
            return in;
        }
        
        return new ServiceManagerProxy(obj);
    }
    
    public ServiceManagerNative()
    {
        attachInterface(this, descriptor);
    }
    
    public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
    {
        try {
            switch (code) {
            case IServiceManager.GET_SERVICE_TRANSACTION: {
                data.enforceInterface(IServiceManager.descriptor);
                String name = data.readString();
                IBinder service = getService(name);
                reply.writeStrongBinder(service);
                return true;
            }
    
            case IServiceManager.CHECK_SERVICE_TRANSACTION: {
                data.enforceInterface(IServiceManager.descriptor);
                String name = data.readString();
                IBinder service = checkService(name);
                reply.writeStrongBinder(service);
                return true;
            }
    
            case IServiceManager.ADD_SERVICE_TRANSACTION: {
                data.enforceInterface(IServiceManager.descriptor);
                String name = data.readString();
                IBinder service = data.readStrongBinder();
                addService(name, service);
                return true;
            }
    
            case IServiceManager.LIST_SERVICES_TRANSACTION: {
                data.enforceInterface(IServiceManager.descriptor);
                String[] list = listServices();
                reply.writeStringArray(list);
                return true;
            }
            
            case IServiceManager.SET_PERMISSION_CONTROLLER_TRANSACTION: {
                data.enforceInterface(IServiceManager.descriptor);
                IPermissionController controller
                        = IPermissionController.Stub.asInterface(
                                data.readStrongBinder());
                setPermissionController(controller);
                return true;
            }
            }
        } catch (RemoteException e) {
        }
        
        return false;
    }

    public IBinder asBinder()
    {
        return this;
    }
}

class ServiceManagerProxy implements IServiceManager {
    public ServiceManagerProxy(IBinder remote) {
        mRemote = remote;
    }
    
    public IBinder asBinder() {
        return mRemote;
    }
    
    public IBinder getService(String name) throws RemoteException {
        Parcel data = Parcel.obtain();
        Parcel reply = Parcel.obtain();
        data.writeInterfaceToken(IServiceManager.descriptor);
        data.writeString(name);
        mRemote.transact(GET_SERVICE_TRANSACTION, data, reply, 0);
        IBinder binder = reply.readStrongBinder();
        reply.recycle();
        data.recycle();
        return binder;
    }

    public IBinder checkService(String name) throws RemoteException {
        Parcel data = Parcel.obtain();
        Parcel reply = Parcel.obtain();
        data.writeInterfaceToken(IServiceManager.descriptor);
        data.writeString(name);
        mRemote.transact(CHECK_SERVICE_TRANSACTION, data, reply, 0);
        IBinder binder = reply.readStrongBinder();
        reply.recycle();
        data.recycle();
        return binder;
    }

    public void addService(String name, IBinder service)
            throws RemoteException {
        Parcel data = Parcel.obtain();
        Parcel reply = Parcel.obtain();
        data.writeInterfaceToken(IServiceManager.descriptor);
        data.writeString(name);
        data.writeStrongBinder(service);
        mRemote.transact(ADD_SERVICE_TRANSACTION, data, reply, 0);
        reply.recycle();
        data.recycle();
    }
    
    public String[] listServices() throws RemoteException {
        Parcel data = Parcel.obtain();
        Parcel reply = Parcel.obtain();
        data.writeInterfaceToken(IServiceManager.descriptor);
        mRemote.transact(LIST_SERVICES_TRANSACTION, data, reply, 0);
        String[] list = reply.readStringArray();
        reply.recycle();
        data.recycle();
        return list;
    }

    public void setPermissionController(IPermissionController controller)
            throws RemoteException {
        Parcel data = Parcel.obtain();
        Parcel reply = Parcel.obtain();
        data.writeInterfaceToken(IServiceManager.descriptor);
        data.writeStrongBinder(controller.asBinder());
        mRemote.transact(SET_PERMISSION_CONTROLLER_TRANSACTION, data, reply, 0);
        reply.recycle();
        data.recycle();
    }

    private IBinder mRemote;
}

Other Android examples (source code examples)

Here is a short list of links related to this Android ServiceManagerNative.java source code file:

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