Android-綁定服務

綁定式服務

第一次綁定服務自動調用 onCreate->onBind
多次調用綁定服務 不會調用任何方法.
只能解綁一次,解綁時調用 unBind->onDestroy


當onBind返回值不爲null,函數的執行過程爲onCreate->onBind->ServiceConnection.onServiceConnected



如果Activity已經成功綁定過一個服務,ctivity報異常
Activity has leaked ServiceConnection that was originally bound here

解決:退出前先解綁

ServiceConnection serviceConnection=new ServiceConnection() {



    @Override

public void onServiceConnected(ComponentName name,
                                   IBinder service) 
{




        LHBindService.MyIBinder s=(LHBindService.MyIBinder)service;





        System.out.println("MainActivity.onServiceConnected  " +
                "Random   "+s.getRandom());



        System.out.println("name = [" + name + "], service = ["
                + service + "]");

        @Override

/**
     * 當服務"異常"斷開時調用的方法
     */

public void onServiceDisconnected(ComponentName name) 
    {

            System.out.println("MainActivity.onServiceDisconnected");
            System.out.println("name = [" + name + "]");


};


Intent intent=new Intent(this,LHBindService.class);
intent.putExtra("key","傳值");

bindService(intent//意圖對象,指定要綁定的服務

,serviceConnection//服務連接對象

,BIND_AUTO_CREATE//標誌位,如果沒有創建服務則自動創建
);