[Android App 개발 스터디] #22 음악재생 MP3

  Mp3 재생기 앱을 구현해볼 것이다.

https://www.youtube.com/watch?v=-jTbUeTSAYU&list=PLC51MBz7PMyyyR2l4gGBMFMMUfYmBkZxm&index=23 

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(1) res -> raw폴더(만들기) -> ashes.mp3(원하는 mp3 파일 소문자형태로 넣기)

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(2) activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_play"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="재생"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn_stop"
        android:layout_weight="1"
        android:text="정지"/>
</LinearLayout>

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(2) MainActivity.java

package com.example.mp3example;

import androidx.appcompat.app.AppCompatActivity;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    Button btn_play;
    Button btn_stop;

    MediaPlayer mediaPlayer;


    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(mediaPlayer != null) {
            mediaPlayer.release();
            mediaPlayer = null ;
        }
    }

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

        btn_play = findViewById(R.id.btn_play);
        btn_stop = findViewById(R.id.btn_stop);

        btn_play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.ashes);
                mediaPlayer.start();
            }
        });

        btn_stop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(mediaPlayer.isPlaying()){
                    mediaPlayer.stop();
                    mediaPlayer.reset();
                }
            }
        });



    }
}

● btn_play 버튼을 누르면 음악이 재생된다.

● btn_stop 버튼을 누르면 음악이 멈춘다.

● 창을 닫아도 계속 플레이가 된다.(ondestroy 부분)

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※ 실행화면