diff --git a/app/src/main/java/org/ntlab/amaryllis/client/VoiceActivity.java b/app/src/main/java/org/ntlab/amaryllis/client/VoiceActivity.java
index 4b3b561..04154a1 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/VoiceActivity.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/VoiceActivity.java
@@ -1,4 +1,230 @@
 package org.ntlab.amaryllis.client;
 
-class VoiceActivity {
-}
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.media.MediaPlayer;
+import android.media.MediaRecorder;
+import android.os.Bundle;
+import android.os.Environment;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+import java.io.File;
+
+public class VoiceActivity extends AppCompatActivity {
+
+    private MediaRecorder mr;
+    private MediaPlayer mp;
+    static final String filePath = Environment.getExternalStorageDirectory() + "/app/res/raw";
+    private int totalTime;
+    private SeekBar positionBar;
+    private TextView elapsedTimeLabel;
+    private TextView remainingTimeLabel;
+    private int StartChange = 1;
+    File file;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        setContentView(R.layout.fragment_maps);
+        file = new File(getFilesDir(),"Sample.3gp");
+        mp = new MediaPlayer();
+
+
+
+        Button Record = (Button)findViewById(R.id.button);
+        Record.setOnClickListener(new View.OnClickListener(){
+            public void onClick(View x){
+                TextView textView1 = (TextView)findViewById(R.id.Notice);
+                textView1.setText("Record Start!");
+                startRecord();
+            }
+        });
+
+        Button Playback = (Button)findViewById(R.id.button2);
+        Playback.setOnClickListener(new View.OnClickListener(){
+            public void onClick(View x){
+                TextView textView1 = (TextView)findViewById(R.id.Notice);
+                textView1.setText("Playback Start!");
+
+                startPlay();
+            }
+        });
+
+    }
+
+
+
+    //public class mp extends Activity implements OnCompletionListener{
+
+    //};
+
+    //再生開始&再生中止
+    private void startPlay(){
+        ImageView Stoping = findViewById(R.id.Stoping);
+        ImageView Playing = findViewById(R.id.Playing);
+        float Tmin = 0;
+        float Tmax = 255;
+        //mp = new MediaPlayer();
+        //mp = MediaPlayer.create(this,R.raw.bgm);
+
+        if(mp.isPlaying()){
+            mp.stop();//再生を中断
+            //mp.pause();//途中から再生を再開したい時はこっちを使う必要があるかも
+            Stoping.setAlpha(1.0f);//画像が見えるようにする処理
+            Playing.setAlpha(0.0f);//画像が見えないようにする処理
+            //try{
+            //mp.prepare();
+            //}catch(IllegalStateException e){
+            //e.printStackTrace();
+            //}catch(IOException e){
+            //e.printStackTrace();
+            //}
+        }else {
+            try {
+                //mp = new MediaPlayer();
+                mp.setDataSource(file.getAbsolutePath());//再生するファイルを持ってくる
+
+                //OutputStream filePath = openFileOutput("a",MODE_PRIVATE);
+                //mp.setDataSource(filePath);
+                mp.prepare();
+            }catch(IllegalStateException e){
+                e.printStackTrace();
+
+                //if(StartChange == 1){
+                //positionBar = findViewById(R.id.positionBar);
+                //positionBar.setMax(totalTime);
+                //positionBar.setOnSeekBarChangeListener(
+                //new SeekBar.OnSeekBarChangeListener(){
+                //public void onProgressChanged(SeekBar seekBar,int progress,boolean fromUser){
+                //if(fromUser){
+                //mp.seekTo(progress);
+                //positionBar.setProgress(progress);
+                //}
+                //}
+
+                //public void onStartTrackingTouch(SeekBar seekBar){
+
+                //}
+
+                //public void onStopTrackingTouch(SeekBar seekBar){
+
+                //}
+                //}
+                //);
+
+                //}
+
+                //mp.start();
+
+
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+            totalTime = mp.getDuration();
+            String S_totalTime = createTimeLabel(totalTime);//createTimeLabelにtotalTimeを渡す。
+            TextView voiceTime = (TextView)findViewById(R.id.VoiceTime);
+            voiceTime.setText(S_totalTime);
+            mp.seekTo(0);
+            mp.start();//再生スタート
+            Playing.setAlpha(1.0f);
+            Stoping.setAlpha(0.0f);
+        }
+    }
+
+    //totalTimeを分、秒に変換
+    public String createTimeLabel(int time){
+        String timeLabel = "";
+        int min = time/1000/60;
+        int sec = time/1000%60;
+
+        timeLabel = min + ":";
+        if(sec < 10) timeLabel += "0";
+        timeLabel += sec;
+        return timeLabel;
+    }
+
+    //録音開始&録音終了
+    private void startRecord(){
+
+        if(StartChange == 0) {
+            try {
+                mr.stop();
+                mr.reset();
+                mr.release();
+                StartChange = 1;
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }else {
+            try {
+                mr = new MediaRecorder();
+                mr.setAudioSource(MediaRecorder.AudioSource.MIC);
+                mr.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
+                mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
+                mr.setOutputFile(file.getAbsolutePath());
+                //mr.setOutputFile(filePath);
+
+                mr.prepare();
+                mr.start();
+                StartChange = 0;
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+
+
+    //private Handler handler = new Handler(){
+    //@Override
+    //public void handleMessage(Message msg){
+    //int currentPosition = msg.what;
+
+    //再生位置を更新
+    //positionBar.setProgress(currentPositon);
+
+    //経過時間ラベル更新
+    //String elapsedTime = createTimeLabel(currentPosition);
+    //elapseTimeLabel.setText(elapsedTime);
+
+    //残り時間ラベル更新
+    //String remainingTime = createTimeLabel(totalTime - currentPosition);
+    //remainingTimeLabel.setText("-" + remainingTime);
+    //}
+    //};
+
+
+
+    //再生停止
+    //private void stopPlay(){
+    //try{
+    //mp.stop();
+    //mp.prepare();
+    //mp.release();
+    //}catch(IllegalStateException e){
+    //e.printStackTrace();
+    //}catch(Exception e){
+    //e.printStackTrace();
+    //}
+    //}
+
+
+    //録音終了
+    //private void stopRecord(){
+    //try{
+    //mr.stop();
+    //mr.reset();
+    //mr.release();
+
+    //}catch(Exception e){
+    //e.printStackTrace();
+    //}
+    //}
+
+
+}
\ No newline at end of file