SimpleAudioTest

09 Dec 2021 in Study on Android

SimpleAudioTest

문제

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">
    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#8BC34A"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="50dp"
        android:orientation="horizontal">
        <androidx.appcompat.widget.AppCompatButton
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10px"
            android:layout_weight="1"
            android:text="듣기" />
        <androidx.appcompat.widget.AppCompatButton
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10px"
            android:layout_weight="1"
            android:text="일시정지" />
        <androidx.appcompat.widget.AppCompatButton
            android:id="@+id/button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10px"
            android:layout_weight="1"
            android:text="중지" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:layout_marginStart="0dp">
        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="실행중인 음악: " />
        <ProgressBar
            android:id="@+id/pb"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="invisible" />
    </LinearLayout>
</RelativeLayout>

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView listView;
    Button Play, Pause, Stop;
    TextView textView;
    ProgressBar pb;
    ArrayList<String> mp3List;
    String selected;
    String Path = "/sdcard/";
    MediaPlayer Player;
    boolean PAUSED = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mp3List = new ArrayList<String>();
        //File[] listFiles() :  디렉토리의 파일목록(디렉토리 포함)을 File배열로 반환한다.
        File[] listFiles = new File(Path).listFiles();
        String fileName, extName;
        for (File listFile : listFiles) {
            fileName = listFile.getName();
            //substring은 해당 인덱스부터 끝까지 추출
            extName = fileName.substring(fileName.length() - 3);
            if (extName.equals(("mp3")))
                mp3List.add(fileName);
        }

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice, mp3List);
        listView = (ListView) findViewById(R.id.list);
        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        listView.setAdapter(adapter);
        listView.setItemChecked(0, true);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> adapterView, View v, int position, long i) {
                selected = mp3List.get(position);
            }
        });
        //selected = mp3List.get(0);
        Play = (Button) findViewById(R.id.button1);
        Pause = (Button) findViewById(R.id.button2);
        Stop = (Button) findViewById(R.id.button3);
        textView = (TextView) findViewById(R.id.textView);
        pb = (ProgressBar) findViewById(R.id.pb);

        Play.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                try {
                    Player = new MediaPlayer();
                    Player.setDataSource(Path + selected);
                    Player.prepare();
                    Player.start();
                    Play.setClickable(false);
                    Pause.setClickable(true);
                    Stop.setClickable(true);
                    textView.setText("실행중인 음악 : " + selected);
                    pb.setVisibility(View.VISIBLE);
                } catch (IOException e) {
                }
            }
        });

        Pause.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (PAUSED == false) {
                    Player.pause();
                    Pause.setText("이어듣기");
                    PAUSED = true;
                    pb.setVisibility(View.INVISIBLE);
                } else {
                    Player.start();
                    PAUSED = false;
                    Pause.setText("일시정지");
                    pb.setVisibility(View.VISIBLE);
                }
            }
        });
        Pause.setClickable(false);

        Stop.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Player.stop();
                Player.reset();
                Play.setClickable(true);
                Pause.setClickable(false);
                Pause.setText("일시정지");
                Stop.setClickable(false);
                textView.setText("실행중인 음악 : ");
                pb.setVisibility(View.INVISIBLE);
            }
        });
        Stop.setClickable(false);

    }
}