diff --git a/app/src/main/java/framework/gameMain/RealTimeActivity.java b/app/src/main/java/framework/gameMain/RealTimeActivity.java
index cb6d0b5..837ef73 100644
--- a/app/src/main/java/framework/gameMain/RealTimeActivity.java
+++ b/app/src/main/java/framework/gameMain/RealTimeActivity.java
@@ -1,62 +1,64 @@
 package framework.gameMain;
 
-import android.app.Activity;
 import android.os.Bundle;
-import android.view.Menu;
-import android.view.MenuItem;
+import android.support.v7.app.AppCompatActivity;
+
+import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-public abstract class RealTimeActivity extends Activity implements Runnable {
-	//インターバル確認用変数
-	private long interval = 15L;
-	private long prevTime = 0L;
-	
-	private ScheduledThreadPoolExecutor schedule = new ScheduledThreadPoolExecutor(1);
-	private boolean fixedInterval;
-	
+public abstract class RealTimeActivity extends AppCompatActivity implements Runnable {
+    //インターバル確認用変数
+    private long interval = 15L;
+    private long prevTime = 0L;
 
-	@Override
-	protected void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-	}	
-	
-	protected void start(long interval){
-		this.interval = interval;
-		this.fixedInterval = false;
-		schedule.scheduleWithFixedDelay(this, interval, interval, TimeUnit.MILLISECONDS);
-	}
-	
-	protected void start(long delay, long interval){
-		this.interval = interval;
-		this.fixedInterval = false;
-		schedule.scheduleWithFixedDelay(this, delay, interval, TimeUnit.MILLISECONDS);
-	}
-	
-	protected void start(long delay, long interval, boolean fixedInterval){
-		this.interval = interval;
-		this.fixedInterval = fixedInterval;
-		schedule.scheduleWithFixedDelay(this, delay, interval, TimeUnit.MILLISECONDS);
-	}
-	
-	protected void stop() {
-		schedule.shutdown();
-	}
-	
-	//繰り返し実行される部分
-	public void run(){
-		long interval;
-		if (prevTime == 0L || fixedInterval) {
-			interval = this.interval;
-			prevTime = System.currentTimeMillis(); 
-		} else {
-			long curTime = System.currentTimeMillis();
-			interval = curTime - prevTime;
-			prevTime = curTime;
-		}
-		update(interval);
-	}
-	
-	//intervalミリ秒のインターバルをおいて定期実行
-	protected abstract void update(long interval);
+    ScheduledFuture<?> future = null;
+    private ScheduledThreadPoolExecutor schedule = new ScheduledThreadPoolExecutor(1);
+    private boolean fixedInterval;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    protected void start(long interval) {
+        this.interval = interval;
+        this.fixedInterval = false;
+        future = schedule.scheduleWithFixedDelay(this, interval, interval, TimeUnit.MILLISECONDS);
+    }
+
+    protected void start(long delay, long interval) {
+        this.interval = interval;
+        this.fixedInterval = false;
+        future = schedule.scheduleWithFixedDelay(this, delay, interval, TimeUnit.MILLISECONDS);
+    }
+
+    protected void start(long delay, long interval, boolean fixedInterval) {
+        this.interval = interval;
+        this.fixedInterval = fixedInterval;
+        future = schedule.scheduleWithFixedDelay(this, delay, interval, TimeUnit.MILLISECONDS);
+    }
+
+    protected void stop() {
+        future.cancel(true);
+        future = null;
+    }
+
+    //繰り返し実行される部分
+    public void run() {
+        long interval;
+        if (prevTime == 0L || fixedInterval) {
+            interval = this.interval;
+            prevTime = System.currentTimeMillis();
+        } else {
+            long curTime = System.currentTimeMillis();
+            interval = curTime - prevTime;
+            prevTime = curTime;
+        }
+        update(interval);
+    }
+
+    //intervalミリ秒のインターバルをおいて定期実行
+    protected abstract void update(long interval);
 }