Android calling Service example

안드로이드에서 묵시적 인텐트를 이용하여 서비를 호출하고 서비스는 액티비티를 호출하는 예

Activity -> Service -> Activity

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="my.android.test"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />
	<uses-permission android:name="android.permission.READ_CONTACTS"/>
	
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".SecondActivity">
            <intent-filter>
                <action android:name="mySecondActivityTest"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
        </activity>
        <service android:name=".SampleService">
            <intent-filter>
                <action android:name="myServiceTest"/>
            </intent-filter>
        </service>
    </application>

</manifest>

MainActivity.java

package my.android.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
	}
	
	public void onBtnClick(View v) {

		/* 명시적 인텐트를 이용한 요청
		Intent intent = new Intent(this, SampleService.class);
		startService(intent);
		*/
		
		// 묵시적 인텐트를 이용한 요청
		Intent intent = new Intent("myServiceTest");
		startService(intent);
	}
}

SampleService.java

package my.android.test;

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

public class SampleService extends Service {

	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}

	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		Log.d("서비스", "서비스 시작됨");
		intent = new Intent("mySecondActivityTest");
		intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		startActivity(intent);
	}
}

SecondActivity.java

package my.android.test;

import android.app.Activity;
import android.os.Bundle;

public class SecondActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.second);
	}
}

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onBtnClick"
        android:text="서비스 프로그램 실행" />
	
</LinearLayout>

second.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_x="12dp"
        android:layout_y="0dp"
        android:ems="10"
        android:text="This is SecondActivity" >

        <requestFocus />
    </EditText>

</AbsoluteLayout>