diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 23a89bb..2c7e034 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,7 +4,7 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleJvm" value="1.8" />
@@ -15,7 +15,6 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index d5d35ec..e9b331e 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="..\:/YK/WorkSpaceA/WiFiScanner-master/app/src/main/res/layout/activity_main.xml" value="0.1082427536231884" />
+        <entry key="..\:/YK/python/WiFiScanner-master/app/src/main/res/layout/activity_main.xml" value="0.3333333333333333" />
+      </map>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
diff --git a/app/src/main/java/sysu/imsl/wifiscanner/MainActivity.java b/app/src/main/java/sysu/imsl/wifiscanner/MainActivity.java
index 75264fa..209b3db 100644
--- a/app/src/main/java/sysu/imsl/wifiscanner/MainActivity.java
+++ b/app/src/main/java/sysu/imsl/wifiscanner/MainActivity.java
@@ -358,5 +358,44 @@ private void saveAllScanRes(){
             Toast.makeText(MainActivity.this, "数据存储成功", Toast.LENGTH_SHORT).show();
         }
     }
-
+    public void Xsub(View view){
+        EditText ev = (EditText) findViewById(R.id.edt_coordinateX);
+        String s = ev.getText().toString();
+        if(s.length()>0){
+            int num = Integer.parseInt(s);
+            num--;
+            String temp = num+"";
+            ev.setText(temp);
+        }
+    }
+    public void Xadd(View view){
+        EditText ev = (EditText) findViewById(R.id.edt_coordinateX);
+        String s = ev.getText().toString();
+        if(s.length()>0){
+            int num = Integer.parseInt(s);
+            num++;
+            String temp = num+"";
+            ev.setText(temp);
+        }
+    }
+    public void Ysub(View view){
+        EditText ev = (EditText) findViewById(R.id.edt_coordinateY);
+        String s = ev.getText().toString();
+        if(s.length()>0){
+            int num = Integer.parseInt(s);
+            num--;
+            String temp = num+"";
+            ev.setText(temp);
+        }
+    }
+    public void Yadd(View view){
+        EditText ev = (EditText) findViewById(R.id.edt_coordinateY);
+        String s = ev.getText().toString();
+        if(s.length()>0){
+            int num = Integer.parseInt(s);
+            num++;
+            String temp = num+"";
+            ev.setText(temp);
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9270e90..460c82d 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -36,35 +36,75 @@
         </Switch>
 
     </LinearLayout>
+
     <LinearLayout
-        android:layout_width="match_parent"
+        android:layout_width="388dp"
         android:layout_height="wrap_content"
-        android:orientation="horizontal"
-        android:layout_margin="10dp">
+        android:layout_margin="10dp"
+        android:orientation="horizontal">
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Coordinate X :   "/>
+            android:text="Coordinate X :   " />
+
         <EditText
             android:id="@+id/edt_coordinateX"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content" />
+            android:layout_width="185dp"
+            android:layout_height="wrap_content"
+            android:inputType="number"/>
+
+        <Button
+            android:id="@+id/Xsub"
+            android:layout_width="37dp"
+            android:layout_height="wrap_content"
+            android:onClick="Xsub"
+            android:text="-"
+            android:layout_marginRight="4dp"/>
+
+        <Button
+            android:id="@+id/Xadd"
+            android:layout_width="37dp"
+            android:layout_height="wrap_content"
+            android:text="+"
+            android:onClick="Xadd"
+            android:layout_marginLeft="4dp"
+            />
 
     </LinearLayout>
 
     <LinearLayout
-        android:layout_width="match_parent"
+        android:layout_width="388dp"
         android:layout_height="wrap_content"
-        android:orientation="horizontal"
-        android:layout_margin="10dp">
+        android:layout_margin="10dp"
+        android:orientation="horizontal">
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Coordinate Y :   "/>
+            android:text="Coordinate Y :   " />
+
         <EditText
             android:id="@+id/edt_coordinateY"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content" />
+            android:layout_width="185dp"
+            android:layout_height="wrap_content"
+            android:inputType="number"/>
+
+        <Button
+            android:id="@+id/Ysub"
+            android:layout_width="37dp"
+            android:layout_height="wrap_content"
+            android:text="-"
+            android:onClick="Ysub"
+            android:layout_marginRight="4dp"/>
+
+        <Button
+            android:id="@+id/Yadd"
+            android:layout_width="37dp"
+            android:layout_height="wrap_content"
+            android:text="+"
+            android:onClick="Yadd"
+            android:layout_marginLeft="4dp"/>
 
     </LinearLayout>