import android.content.ComponentName; import android.content.Intent; import com.example.androidsy4.R; public class MainActivity extends AppCompatActivity implements View.OnClickListener { Button btnBindService, btnUnbindService, btnGetStatus; TextView tvServiceStatus; MyService.MyServiceBinder serviceBinder; boolean isServiceBind = false; ServiceConnection conn = new ServiceConnection(){ @Override public void onServiceConnected(ComponentName name, IBinder service) { } @Override public void onServiceDisconnected(componentName name){ } }; @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnBindService=findViewById(R.id.btn_main_activity_bind_service); btnUnbindService=findViewById(R.id.btn_main_activity_unbind_service); btnGetStatus=findViewById(R.id.btn_main_activity_get_status); tvServiceStatus=findViewById(R.id.tv_main_activity_service_status); btnBindService.setOnClickListener(this); btnUnbindService.setOnClickListener(this); btnGetStatus.setOnClickListerner(this); } @Override public void onClick(view v){ Intent intent=new Intent(); intent.setClass(MainActivity.this,Myservice.class); switch (v.gerId()){ case R.id.btn_main_activity_bind_service: break; case R.id.btn_main_activity_get_status: break; case R.id.btn_main_activity_unbind_service: break; } } }补充所缺代码

补充的代码如下：

@Override
public void onClick(View v) {
    Intent intent = new Intent();
    intent.setClass(MainActivity.this, MyService.class);
    switch (v.getId()) {
        case R.id.btn_main_activity_bind_service:
            bindService(intent, conn, BIND_AUTO_CREATE);
            isServiceBind = true;
            break;
        case R.id.btn_main_activity_get_status:
            if (isServiceBind) {
                tvServiceStatus.setText(serviceBinder.getServiceStatus());
            } else {
                Toast.makeText(MainActivity.this, "请先绑定服务", Toast.LENGTH_SHORT).show();
            }
            break;
        case R.id.btn_main_activity_unbind_service:
            if (isServiceBind) {
                unbindService(conn);
                isServiceBind = false;
            } else {
                Toast.makeText(MainActivity.this, "服务未绑定", Toast.LENGTH_SHORT).show();
            }
            break;
    }
}

// 在 onServiceConnected() 中获取服务的 Binder 对象
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
    serviceBinder = (MyService.MyServiceBinder) service;
}

// 在 onServiceDisconnected() 中清空 Binder 对象
@Override
public void onServiceDisconnected(ComponentName name) {
    serviceBinder = null;
}