应用内绑定服务例子

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绑定服务场景：应用内其他地方需要调用服务中的方法。

例子1，Binder中的所有方法都可以被调用：

public class BindService extends Service {    @Override    public IBinder onBind(Intent intent) {        return new ServiceBinder();    }    public class ServiceBinder extends Binder {        public void callServiceMethod() {            sayHello();        }    }    public void sayHello() {        System.out.println("Hello bindService!");    }}

服务要在manifest中注册。
调用：

public class MainActivity extends Activity {    private ServiceBinder mService;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bind();        Button button = (Button) findViewById(R.id.button);        button.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                if (mService != null) {                    mService.callServiceMethod();                }            }        });    }    @Override    protected void onDestroy() {        super.onDestroy();        unBind();    }    private void bind() {        Intent service = new Intent(this, BindService.class);        bindService(service, mConnection, Context.BIND_AUTO_CREATE);    }    private void unBind() {        if (mConnection != null) {            unbindService(mConnection);        }        mService = null;    }    ServiceConnection mConnection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {            System.out.println("进程挂了或服务被异常杀死时调用");        }        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mService = (ServiceBinder) service;            System.out.println("綁定成功");        }    };}

例子2，binder中有自己的私有方法不想被外部调用，则需要添加接口，把外部可以访问的方法写到接口中。

public interface IServiceBinder {    public void callServiceMethod();}

服务：

public class BindService extends Service {    @Override    public IBinder onBind(Intent intent) {        return new ServiceBinder();    }    public class ServiceBinder extends Binder implements IServiceBinder {        @Override        public void callServiceMethod() {            sayHello();        }        // 不想被外部调用的方法        private void sayGoodBye() {            System.out.println("bye bye BindService!");        }    }    public void sayHello() {        System.out.println("Hello BindService!");    }}

调用：

public class MainActivity extends Activity {    private IServiceBinder mService;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bind();        Button button = (Button) findViewById(R.id.button);        button.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                if (mService != null) {                    mService.callServiceMethod();                }            }        });    }    private void bind() {        Intent service = new Intent(this, BindService.class);        bindService(service, mConn, Context.BIND_AUTO_CREATE);    }    private void unBind() {        if (mConn != null) {            unbindService(mConn);        }        mService = null;    }    protected void onDestroy() {        super.onDestroy();        unBind();    };    ServiceConnection mConn = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {        }        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mService = (IServiceBinder) service;        }    };}

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