Sevice 구현 예제

위와 같은 디자인으로 다음과 같은 예제 소스를 입력하여 Service 기능을 확인할 수 있다. java class 아래와 같이 두개로 만든다.

package org.techtown.myservice16;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    EditText editText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editText = (EditText) findViewById(R.id.editText);

        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = editText.getText().toString();

                Intent intent = new Intent(getApplicationContext(), MyService.class);
                intent.putExtra("command", "show");
                intent.putExtra("name", name);
                startService(intent);

            }
        });

        Intent passedIntent = getIntent();
        processCommand(passedIntent);

    }

    @Override
    protected void onNewIntent(Intent intent) {
        processCommand(intent);

        super.onNewIntent(intent);
    }

    private void processCommand(Intent intent){
        if (intent != null){
            String command = intent.getStringExtra("command");
            String name = intent.getStringExtra("name");

            Toast.makeText(this, "서비스로부터 전달받은 데이터 : " + command + ", " +  name, Toast.LENGTH_LONG).show();
        }
    }
}

package org.techtown.myservice16;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service {
    private static final String TAG = "Myservice";

    public MyService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();

        Log.d(TAG, "onCreate() 호출됨.");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG, "onStartCommand() 호출됨.");

        if(intent == null){
            return Service.START_STICKY;
        } else {
            processCommand(intent);
        }

        return super.onStartCommand(intent, flags, startId);
    }

    private void processCommand(Intent intent){
        String command = intent.getStringExtra("command");
        String name = intent.getStringExtra("name");

        Log.d(TAG, "전달받은 데이터 : " + command + "," + name);

        try {
            Thread.sleep(5000);
        } catch (Exception e){

        }

        Intent showIntent = new Intent(getApplicationContext(), MainActivity.class);
        showIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|
                            Intent.FLAG_ACTIVITY_SINGLE_TOP|
                            Intent.FLAG_ACTIVITY_CLEAR_TOP);
        showIntent.putExtra("command", "show");
        showIntent.putExtra("name", name + "from service. ");
        startActivity(showIntent);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        Log.d(TAG, "onStart() 호출됨.");
    }

    @Override
    public IBinder onBind(Intent intent) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
}