[챕터 2-5-1] 서비스와 수신자

결과화면

텍스트 입력 후

서비스 시작 버튼을 클릭한 후, 5초 후

 

 

서비스 : 백그라운드

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프로젝트명 : MyService

 

 

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package org.minokuma.myservice;

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

public class MyService extends Service {
    public MyService() {
    }

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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return super.onStartCommand(intent, flags, startId);
    }

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

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

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MainActivity.java

package org.minokuma.myservice;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

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

        final EditText editText = findViewById(R.id.editText);
        Button button = findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = editText.getText().toString();
                Intent intent = new Intent(getApplicationContext(), MyService.class);
                intent.putExtra("command","show");
                intent.putExtra("name",name);
                startService(intent);
            }
        });

    }
}

 

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MyService.java

 

package org.minokuma.myservice;

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()");
    }

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

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

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

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

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

    @Override
    public void onDestroy() {
        Log.d(TAG, "onDestroy()");
        super.onDestroy();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

 

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텍스트에 MINOKUMA 입력 후 서비스 시작 버튼 클릭

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로그에서 확인할 수 있다.

 

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MyService.java

 

package org.minokuma.myservice;

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()");
    }

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

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

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

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

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


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

        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() {
        Log.d(TAG, "onDestroy()");
        super.onDestroy();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

 

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MainActivity.java

package org.minokuma.myservice;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        final EditText editText = findViewById(R.id.editText);
        Button button = findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = editText.getText().toString();
                Intent intent = new Intent(getApplicationContext(), MyService.class);
                intent.putExtra("command","show");
                intent.putExtra("name",name);
                startService(intent);
            }
        });

        Intent intent = getIntent();
        processIntent(intent);

    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);

        processIntent(intent);
    }

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

            Toast.makeText(this, "command : " + command + ", name : " + name, Toast.LENGTH_SHORT).show();
        }
    }
}