diff --git a/app/src/main/java/vivz/slidenerd/agriculture/home/ChangeMyinfoActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/home/ChangeMyinfoActivity.java
index 00cfa80..488a0b7 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/home/ChangeMyinfoActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/home/ChangeMyinfoActivity.java
@@ -15,6 +15,7 @@
 import android.provider.MediaStore;
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.widget.Button;
@@ -269,6 +270,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     // 모집 리스트 출력 부분
     public class phpGetUserInfo extends AsyncTask<String, Integer,String> {
 
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/home/MyDiaryActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/home/MyDiaryActivity.java
index e226e31..be0f1aa 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/home/MyDiaryActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/home/MyDiaryActivity.java
@@ -6,6 +6,7 @@
 import android.os.Bundle;
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -112,6 +113,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
 
     // AsyncTask는 generic 클래스이기 때문에 타입을 지정해주어야 한다. < Params, Progress, Result > 부분
     /*
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/list/ListActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/list/ListActivity.java
index 6b39139..4cce4df 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/list/ListActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/list/ListActivity.java
@@ -8,6 +8,7 @@
 import android.support.v4.app.ActivityCompat;
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -172,6 +173,17 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+
 
     // AsyncTask는 generic 클래스이기 때문에 타입을 지정해주어야 한다. < Params, Progress, Result > 부분
     /*
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity.java
index e832891..9bad8d7 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity.java
@@ -10,6 +10,7 @@
 import android.text.util.Linkify;
 import android.util.Log;
 import android.view.GestureDetector;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -315,6 +316,16 @@ protected void onDestroy() {
 
         super.onDestroy();
     }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
     public  String creHtmlBody(String imagUrl){
         StringBuffer sb = new StringBuffer("<HTML>");
         sb.append("<HEAD>");
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity_.java b/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity_.java
index 8d7a045..9ede3fb 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity_.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/list/ListDetailActivity_.java
@@ -4,6 +4,7 @@
 import android.graphics.Typeface;
 import android.os.Bundle;
 import android.support.v7.app.ActionBarActivity;
+import android.view.KeyEvent;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
@@ -77,6 +78,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     Button.OnClickListener detailClickListener = new View.OnClickListener()
     {
         public void onClick(View v)
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryActivity__.java b/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryActivity__.java
index 3bd0c0b..bf831e3 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryActivity__.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryActivity__.java
@@ -12,6 +12,7 @@
 import android.os.Message;
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -204,6 +205,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     // 리스트 뷰 항목에 들어가는 웹뷰 이미지 화면을 웹뷰크기에 맞게 조절
     public String creHtmlBody(String imgUrl) {
         StringBuffer sb = new StringBuffer("<HTML>");
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryDetailActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryDetailActivity.java
index 21f8dda..91449c7 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryDetailActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/mydiary/MyDiaryDetailActivity.java
@@ -9,6 +9,7 @@
 import android.os.Message;
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.View;
 import android.widget.Button;
 import android.widget.LinearLayout;
@@ -173,6 +174,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     // MydiaryDetail 부분에서 취소하기
     public class phpMyDiaryListCancel extends AsyncTask<String, Integer,String> {
 
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/navigate/BaseActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/navigate/BaseActivity.java
index 7c3549e..35bdc52 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/navigate/BaseActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/navigate/BaseActivity.java
@@ -5,6 +5,7 @@
 import android.content.Intent;
 import android.graphics.Typeface;
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.Button;
@@ -75,6 +76,16 @@ protected void onDestroy() {
 
         super.onDestroy();
     }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
     @Override
     protected void onResume() {
         super.onResume();
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateActivity.java
index b1c0c01..6eb08ab 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateActivity.java
@@ -617,6 +617,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     @Override
     protected void onStop() {
 
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateSearch.java b/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateSearch.java
index a6dc86e..0cca2a4 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateSearch.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/navigate/NavigateSearch.java
@@ -214,6 +214,8 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/recruit/Recruit.java b/app/src/main/java/vivz/slidenerd/agriculture/recruit/Recruit.java
index 0e034b0..2402711 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/recruit/Recruit.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/recruit/Recruit.java
@@ -30,6 +30,7 @@
 import android.text.TextWatcher;
 import android.util.DisplayMetrics;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.View;
@@ -459,6 +460,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     @Override
     protected Dialog onCreateDialog(int id) {
         switch(id){
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/region_theme/RegionChoiceActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/region_theme/RegionChoiceActivity.java
index 1177f5e..ccb0e5c 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/region_theme/RegionChoiceActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/region_theme/RegionChoiceActivity.java
@@ -3,6 +3,7 @@
 import android.content.Intent;
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -70,9 +71,6 @@ public void onClick(View view) {
                 startActivity(moveToHomeIntent);
             }
         });
-
-
-
     }
 
     Button.OnClickListener mClickListener = new View.OnClickListener()
@@ -156,4 +154,14 @@ protected void onDestroy() {
 
         super.onDestroy();
     }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
 }
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/region_theme/ThemeChoiceActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/region_theme/ThemeChoiceActivity.java
index ef67317..a679e03 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/region_theme/ThemeChoiceActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/region_theme/ThemeChoiceActivity.java
@@ -3,6 +3,7 @@
 import android.content.Intent;
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -108,6 +109,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/sign/NormalLoginActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/sign/NormalLoginActivity.java
index b74e314..a57cfa9 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/sign/NormalLoginActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/sign/NormalLoginActivity.java
@@ -9,6 +9,7 @@
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -135,6 +136,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivity.java
index 79cb72e..807a698 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivity.java
@@ -6,6 +6,7 @@
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v7.app.ActionBarActivity;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -40,6 +41,16 @@ protected void onCreate(Bundle savedInstanceState) {
         transaction.commit();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
 
 
     @Override
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivityFragment.java b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivityFragment.java
index 84fdbee..0574f7b 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivityFragment.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignChoiceActivityFragment.java
@@ -134,6 +134,8 @@ public void onViewCreated(View view, Bundle savedInstanceState) {
 
     }
 
+
+
     @Override
     public void onResume() {
         super.onResume();
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupActivity.java
index 7b6cb2c..1d89672 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupActivity.java
@@ -21,6 +21,7 @@
 import android.support.v4.app.FragmentActivity;
 import android.text.TextUtils;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.widget.Button;
@@ -371,6 +372,16 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     // 웹뷰 이미지 화면을 웹뷰크기에 맞게 조절
     public String creHtmlBody(String imgUrl) {
         StringBuffer sb = new StringBuffer("<HTML>");
diff --git a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupChoiceActivity.java b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupChoiceActivity.java
index 6ae187a..90083c8 100644
--- a/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupChoiceActivity.java
+++ b/app/src/main/java/vivz/slidenerd/agriculture/sign/SignupChoiceActivity.java
@@ -4,6 +4,7 @@
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -104,6 +105,16 @@ public void onClick(View view) {
 
     }
 
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch(keyCode){
+            case KeyEvent.KEYCODE_BACK:
+                finish();
+                return true;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);