class MainActivity

 

package kr.co.braverokmc.audioplayer;

import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private static final String TAG="MainActivity";

    MediaPlayer player;
    String url ="https://sites.google.com/site/ubiaccessmobile/sample_audio.amr";

    Toast toast;

    int position; // 일시정지시 현재 위치 저장

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


    //시작
    public void onButton1Clicked(View v){

        Log.i(TAG, "시작 버튼 클릭 됨");
        try {
            killPlayer();

            player =new MediaPlayer();
            player.setDataSource(url);
            player.prepare();
            player.start();
        } catch (IOException e) {
            e.printStackTrace();
        }
        toastShow("재생을 시작합니다.");

    }


    private void killPlayer(){
        if(player!=null){
            player.release(); //리소스를 전부 해제
            player=null;
        }
    }


    //일시정지
    public void onButton2Clicked(View v){
        Log.i(TAG, "일시정지 클릭 됨");
        if(player!=null && player.isPlaying()){
            position=player.getCurrentPosition();
            player.pause();
            toastShow("재생을 일시정지합니다.");
        }
    }


    //재시작
    public void onButton3Clicked(View v){
        Log.i(TAG, "재시작 클릭 됨");
        if(player!=null && !player.isPlaying()){
            player.start();
            player.seekTo(position);// 정지 위치 찾아가기
            toastShow("재생을 재시작합니다.");
        }
    }

    //중지
    public void onButton4Clicked(View v){
        Log.i(TAG, "중지 버튼 클릭 됨");
        if(player!=null && player.isPlaying()){
            player.stop();
        }
        toastShow("재생을 중지합니다.");
    }


    private void toastShow(String text){

        if(toast==null){
            toast=Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT);
        }else {
            toast.setText(text);
        }
        toast.show();
    }


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

        killPlayer();
    }
}

 

R.layout.activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="kr.co.braverokmc.audioplayer.MainActivity">

    <Button
        android:text="시작"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="116dp"
        android:layout_marginStart="116dp"
        android:id="@+id/button1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:onClick="onButton1Clicked"
        />

    <Button
        android:text="일시정지"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="28dp"
        android:id="@+id/button2"
        android:layout_below="@+id/button1"
        android:layout_alignLeft="@+id/button1"
        android:layout_alignStart="@+id/button1"
        android:onClick="onButton2Clicked"
        />

    <Button
        android:text="재시작"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="35dp"
        android:id="@+id/button3"
        android:layout_below="@+id/button2"
        android:layout_alignLeft="@+id/button2"
        android:layout_alignStart="@+id/button2"
        android:onClick="onButton3Clicked"
        />

    <Button
        android:text="중지"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button3"
        android:layout_alignRight="@+id/button3"
        android:layout_alignEnd="@+id/button3"
        android:layout_marginTop="49dp"
        android:id="@+id/button4"
        android:onClick="onButton4Clicked"
        />


</RelativeLayout>

 

AndroidMainfest.xml

 

<uses-permission android:name="android.permission.INTERNET"/>

 

 

 

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112강