diff --git a/app/src/main/java/org/ntlab/amaryllis/client/VoiceTest.java b/app/src/main/java/org/ntlab/amaryllis/client/VoiceTest.java
index 7dfb80d..0554c2f 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/VoiceTest.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/VoiceTest.java
@@ -1,13 +1,17 @@
 package org.ntlab.amaryllis.client;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import android.os.Bundle;
 import android.media.MediaPlayer;
 import android.media.MediaRecorder;
 import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
 import android.view.View;
 import android.widget.Button;
 import android.widget.LinearLayout;
+import android.widget.SeekBar;
 import android.widget.TextView;
 
 import java.io.File;
@@ -19,6 +23,11 @@
     private MediaPlayer mp;
     private MediaRecorder mr;
     static final String filePath = Environment.getExternalStorageDirectory() + "/app/res/raw";
+    private int totalTime;
+    private SeekBar positionBar;
+    private TextView elapsedTimeLabel;
+    private TextView remainingTimeLabel;
+    public int StartChange = 0;
     //String[] txt = {"録音", "停止", "再生"};
     //boolean[] bl1 = {true, false, true};
     //boolean[] bl2 = {false, true, false};
@@ -27,6 +36,7 @@
     //再生
     private void startPlay(){
         mp = new MediaPlayer();
+        StartChange = 1;
         //mp = MediaPlayer.create(this,R.raw.bgm);
         try {
             //mp = new MediaPlayer();
@@ -34,6 +44,37 @@
             //OutputStream filePath = openFileOutput("a",MODE_PRIVATE);
             //mp.setDataSource(filePath);
             mp.prepare();
+            mp.setLooping(false);
+            mp.seekTo(0);
+            //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){
+
+                            }
+                        }
+                );
+                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);
+                //voiceTime.setText("S_totalTime");
+
+            //}
+
             mp.start();
         }catch(Exception e){
             e.printStackTrace();
@@ -52,6 +93,19 @@
         }
     }
 
+    //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
     private void startRecord(){
         try{
             mr = new MediaRecorder();
@@ -69,6 +123,7 @@
         }
     }
 
+    //録音終了
     private void stopRecord(){
         try{
             mr.stop();
@@ -86,6 +141,8 @@
         setContentView(R.layout.activity_voice_test);
         file = new File(getFilesDir(),"Sample.3gp");
 
+
+
         Button Rokuon = (Button)findViewById(R.id.button2);
         Rokuon.setOnClickListener(new View.OnClickListener(){
             public void onClick(View x){
@@ -113,5 +170,25 @@
             }
         });
     }
+
+    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);
+        }
+    };
+
+
 }
 
diff --git a/app/src/main/res/layout/activity_voice_test.xml b/app/src/main/res/layout/activity_voice_test.xml
index b6c3ca7..331623f 100644
--- a/app/src/main/res/layout/activity_voice_test.xml
+++ b/app/src/main/res/layout/activity_voice_test.xml
@@ -40,10 +40,16 @@
             android:layout_height="51dp"
             android:text="TextView" />
 
+        <TextView
+            android:id="@+id/voiceTime"
+            android:layout_width="match_parent"
+            android:layout_height="67dp"
+            android:text="再生時間" />
+
     </LinearLayout>
 
     <SeekBar
-        android:id="@+id/seekBar"
+        android:id="@+id/positionBar"
         android:layout_width="340dp"
         android:layout_height="55dp"
         app:layout_constraintBottom_toBottomOf="parent"