7-3-1 음성 녹음하기

MainActivity

package com.example.boostcoursepractice;
 
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
 
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
 
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
 
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.VideoView;
 
import java.io.File;
import java.net.URL;
import java.util.HashMap;
 
public class MainActivity extends AppCompatActivity {
 
    MediaRecorder recorder;
    String filename;
 
    MediaPlayer player;
    int position = 0;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        File sdcard = Environment.getExternalStorageDirectory();
        File file = new File(sdcard, "recorded.mp4");
        filename = file.getAbsolutePath();
        Log.d("MainActivity", "저장할 파일명 : " + filename);
 
        Button button = (Button) findViewById(R.id.button);
 
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                palyAudio();
            }
        });
 
 
        Button button2 = (Button) findViewById(R.id.button2);
 
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                pauseAudio();
            }
        });
 
        Button button3 = (Button) findViewById(R.id.button3);
 
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resumeAudio();
            }
        });
 
        Button button4 = (Button) findViewById(R.id.button4);
 
        button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopAudio();
            }
        });
 
        Button button5 = (Button) findViewById(R.id.button5);
 
        button5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                recordAudio();
            }
        });
 
        Button button6 = (Button) findViewById(R.id.button6);
 
        button6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopRecording();
            }
        });
    }
 
    public void palyAudio() {
        try {
            closePlayer();
 
            player = new MediaPlayer();
            player.setDataSource(filename);
            player.prepare();
            player.start();
 
            Toast.makeText(this, "재생 시작됨", Toast.LENGTH_LONG).show();
 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public void pauseAudio() {
        if (player != null && player.isPlaying()) {
            position = player.getCurrentPosition();
            player.pause();
 
            Toast.makeText(this, "일시 정지지됨", Toast.LENGTH_LONG).show();
        }
    }
 
    public void resumeAudio() {
        if (player != null && !player.isPlaying()) {
            player.seekTo(position);
            player.start();
 
            Toast.makeText(this, "재시작됨", Toast.LENGTH_LONG).show();
        }
    }
 
    public void stopAudio() {
        if (player != null && player.isPlaying()) {
            player.stop();
 
            Toast.makeText(this, "중지됨", Toast.LENGTH_LONG).show();
        }
    }
 
    public void closePlayer() {
        if (player != null) {
            player.release();
            player = null;
        }
    }
 
    public void recordAudio() {
        recorder = new MediaRecorder();
 
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
 
        recorder.setOutputFile(filename);
 
        try {
            recorder.prepare();
            recorder.start();
 
            Toast.makeText(this, "녹음 시작됨", Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public void stopRecording(){
        if(recorder != null){
            recorder.stop();
            recorder.release();
            recorder = null ;
 
            Toast.makeText(this, "녹음 중지됨", Toast.LENGTH_LONG).show();
        }
    }
}
 

 

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"
    android:orientation="vertical">
 
    <Button
        android:id="@+id/button5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="녹음시작" />
 
    <Button
        android:id="@+id/button6"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="녹음중지" />
 
    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="재생" />
 
    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="일시정지" />
 
    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="재시작" />
 
    <Button
        android:id="@+id/button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="정지" />
</LinearLayout>

 

기존에 진행 했던 '7-2-1 음악 재생하기'에서 좀 더 확장하여 구현하였다.  항상 종료가 될 때는 아래처럼

 

recorder.stop();

            recorder.release();

            recorder = null ;

 

자원을 해제하는 것을 잊지 말자

 

결과화면