diff --git a/res/drawable/float_button.xml b/res/drawable/float_button.xml
index a8948d25773b22c1c94dcaf51352de0da05e3ea6..bf1fc3ca85f67fadaf996ff12d9db46238f6627d 100644
--- a/res/drawable/float_button.xml
+++ b/res/drawable/float_button.xml
@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
 
-    <!-- 连框颜色值 -->
+    <!-- border settings -->
     <item>
         <shape>
             <solid android:color="@color/red" />
             <corners android:radius="3dp" />  
         </shape>
     </item>
-    <!-- 主体背景颜色值 -->
+
     <item
         android:bottom="1dp"
         android:right="1dp"
diff --git a/res/layout/mainpage.xml b/res/layout/mainpage.xml
index ca0790fe886bfffbd16643634b760bf9b0a908b1..d22ac553c978b525d3ae728f8df01d64df535455 100644
--- a/res/layout/mainpage.xml
+++ b/res/layout/mainpage.xml
@@ -1,45 +1,47 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-              android:layout_width="fill_parent"
-              android:layout_height="fill_parent"
-              android:gravity="bottom|center_horizontal|center_vertical"
-              android:background="@color/light_purple"
-              android:orientation="vertical">
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:background="@color/light_purple"
+    android:gravity="bottom|center_horizontal|center_vertical"
+    android:orientation="vertical" >
 
     <LinearLayout
-            android:layout_width="fill_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal" >
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal" >
 
         <include
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                layout="@layout/navigation_bar" />
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            layout="@layout/navigation_bar" />
     </LinearLayout>
+
     <ListView
-            android:id="@+id/processList"
-            android:layout_width="fill_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:cacheColorHint="@color/light_purple"
-            android:listSelector="@color/light_purple"/>
+        android:id="@+id/processList"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:cacheColorHint="@color/light_purple"
+        android:listSelector="@color/light_purple" />
+
     <LinearLayout
-            android:layout_width="fill_parent"
-            android:layout_height="50dp"
-            android:background="@drawable/bottom_bg" >
+        android:layout_width="fill_parent"
+        android:layout_height="@dimen/layout_height_test"
+        android:background="@drawable/bottom_bg" >
 
         <Button
-                android:id="@+id/test"
-                android:layout_width="fill_parent"
-                android:layout_height="fill_parent"
-                android:layout_marginTop="6dp"
-                android:layout_marginBottom="2dp"
-                android:layout_marginLeft="30dp"
-                android:layout_marginRight="30dp"
-                android:background="@drawable/test_button"
-                android:text="@string/start_test"
-                android:textColor="#ffffff"
-                android:textSize="16sp" />
+            android:id="@+id/test"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent"
+            android:layout_marginBottom="@dimen/layout_marginBottom_test"
+            android:layout_marginLeft="@dimen/layout_marginLeft_test"
+            android:layout_marginRight="@dimen/layout_marginRight_test"
+            android:layout_marginTop="@dimen/layout_marginTop_test"
+            android:background="@drawable/test_button"
+            android:text="@string/start_test"
+            android:textColor="@color/white"
+            android:textSize="@dimen/text_size_test" />
     </LinearLayout>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 6933e35969850309a0d48a7e932a2e22f0e712ca..9887524bfa4cffef414a7e4c3cff802fb791380e 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -27,4 +27,12 @@
 	<dimen name="edit_margin">5px</dimen>
 	
 	<dimen name="action_bar_height">60dp</dimen>
+
+    <dimen name="layout_height_test">50dp</dimen>
+    <dimen name="layout_marginTop_test">6dp</dimen>
+    <dimen name="layout_marginBottom_test">2dp</dimen>
+    <dimen name="layout_marginLeft_test">30dp</dimen>
+    <dimen name="layout_marginRight_test">30dp</dimen>
+    <dimen name="text_size_test">16sp</dimen>
+
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index c5df3d005e1f64a940b645f27439f8495deefd89..916830365ce00eb2f78a6881076f1bcd9e8c627a 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -8,7 +8,7 @@
     <string name="start_test">Start Test</string>
     <string name="stop_test">Stop Test</string>
 
-    <string name="collecting_frequency">Collecting Frequency(s)</string>
+    <string name="collecting_frequency">Collecting Interval(s)</string>
     <string name="sender">Sender:</string>
     <string name="password">Password:</string>
     <string name="smtp">SMTP Server:</string>
@@ -22,7 +22,7 @@
     <string name="process_free_mem">App/Available Memory:</string>
     <string name="process_overall_cpu">App/System CPU:</string>
     <string name="start_time">Start Time:</string>
-    <string name="total_usage">Total Usage(%)</string>
+    <string name="total_usage">\u0020Total Usage(%)</string>
     <string name="process_package">Package Name</string>
     <string name="process_name">App Name</string>
     <string name="process_pid">App PID</string>
diff --git a/src/com/netease/qa/emmagee/activity/MainPageActivity.java b/src/com/netease/qa/emmagee/activity/MainPageActivity.java
index 278432ecf913567d3d9b2d1f2ca7b7008897b840..d60bb9c5d81891db56549e70bc17c8489ad8aa0f 100644
--- a/src/com/netease/qa/emmagee/activity/MainPageActivity.java
+++ b/src/com/netease/qa/emmagee/activity/MainPageActivity.java
@@ -70,11 +70,11 @@ public class MainPageActivity extends Activity {
 	private boolean isServiceStop = false;
 	private UpdateReceiver receiver;
 
-    private TextView nb_title;
-    private ImageView go_back;
-    private ImageView btn_set;
-    private LinearLayout layBtnSet;
-    private Long mExitTime = (long) 0;
+	private TextView nbTitle;
+	private ImageView ivGoBack;
+	private ImageView ivBtnSet;
+	private LinearLayout layBtnSet;
+	private Long mExitTime = (long) 0;
 
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
@@ -82,80 +82,81 @@ public class MainPageActivity extends Activity {
 		super.onCreate(savedInstanceState);
 		requestWindowFeature(Window.FEATURE_NO_TITLE);
 		setContentView(R.layout.mainpage);
-        initTitleLayout();
+		initTitleLayout();
 		createNewFile();
 
 		processInfo = new ProcessInfo();
 		btnTest.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                monitorService = new Intent();
-                monitorService.setClass(MainPageActivity.this, EmmageeService.class);
-                if (getString(R.string.start_test).equals(btnTest.getText().toString())) {
-                    if (isRadioChecked) {
-                        Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);
-                        String startActivity = "";
-                        Log.d(LOG_TAG, packageName);
-                        //clear logcat
-                        try {
-                            Runtime.getRuntime().exec("logcat -c");
-                        } catch (IOException e) {
-                            Log.d(LOG_TAG, e.getMessage());
-                        }
-                        try {
-                            startActivity = intent.resolveActivity(getPackageManager()).getShortClassName();
-                            startActivity(intent);
-                        } catch (Exception e) {
-                            Toast.makeText(MainPageActivity.this, getString(R.string.can_not_start_app_toast), Toast.LENGTH_LONG).show();
-                            return;
-                        }
-                        waitForAppStart(packageName);
-                        monitorService.putExtra("processName", processName);
-                        monitorService.putExtra("pid", pid);
-                        monitorService.putExtra("uid", uid);
-                        monitorService.putExtra("packageName", packageName);
-                        monitorService.putExtra("settingTempFile", settingTempFile);
-                        monitorService.putExtra("startActivity", startActivity);
-                        startService(monitorService);
-                        btnTest.setText(getString(R.string.stop_test));
-                    } else {
-                        Toast.makeText(MainPageActivity.this, getString(R.string.choose_app_toast), Toast.LENGTH_LONG).show();
-                    }
-                } else {
-                    btnTest.setText(getString(R.string.start_test));
-                    Toast.makeText(MainPageActivity.this, getString(R.string.test_result_file_toast) + EmmageeService.resultFilePath, Toast.LENGTH_LONG).show();
-                    stopService(monitorService);
-                }
-            }
-        });
+			@Override
+			public void onClick(View v) {
+				monitorService = new Intent();
+				monitorService.setClass(MainPageActivity.this, EmmageeService.class);
+				if (getString(R.string.start_test).equals(btnTest.getText().toString())) {
+					if (isRadioChecked) {
+						Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);
+						String startActivity = "";
+						Log.d(LOG_TAG, packageName);
+						// clear logcat
+						try {
+							Runtime.getRuntime().exec("logcat -c");
+						} catch (IOException e) {
+							Log.d(LOG_TAG, e.getMessage());
+						}
+						try {
+							startActivity = intent.resolveActivity(getPackageManager()).getShortClassName();
+							startActivity(intent);
+						} catch (Exception e) {
+							Toast.makeText(MainPageActivity.this, getString(R.string.can_not_start_app_toast), Toast.LENGTH_LONG).show();
+							return;
+						}
+						waitForAppStart(packageName);
+						monitorService.putExtra("processName", processName);
+						monitorService.putExtra("pid", pid);
+						monitorService.putExtra("uid", uid);
+						monitorService.putExtra("packageName", packageName);
+						monitorService.putExtra("settingTempFile", settingTempFile);
+						monitorService.putExtra("startActivity", startActivity);
+						startService(monitorService);
+						btnTest.setText(getString(R.string.stop_test));
+					} else {
+						Toast.makeText(MainPageActivity.this, getString(R.string.choose_app_toast), Toast.LENGTH_LONG).show();
+					}
+				} else {
+					btnTest.setText(getString(R.string.start_test));
+					Toast.makeText(MainPageActivity.this, getString(R.string.test_result_file_toast) + EmmageeService.resultFilePath,
+							Toast.LENGTH_LONG).show();
+					stopService(monitorService);
+				}
+			}
+		});
 		lstViProgramme.setAdapter(new ListAdapter());
-        lstViProgramme.setOnItemClickListener(new AdapterView.OnItemClickListener() {
-            @Override
-            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
-                RadioButton rdBtn = (RadioButton)((LinearLayout)view).getChildAt(0);
-                rdBtn.setChecked(true);
-            }
-        });
-
-        nb_title.setText(getString(R.string.app_name));
-        go_back.setVisibility(ImageView.INVISIBLE);
-        btn_set.setImageResource(R.drawable.settings_button);
-        layBtnSet.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                goToSettingsActivity();
-            }
-        });
+		lstViProgramme.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+			@Override
+			public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
+				RadioButton rdBtn = (RadioButton) ((LinearLayout) view).getChildAt(0);
+				rdBtn.setChecked(true);
+			}
+		});
+
+		nbTitle.setText(getString(R.string.app_name));
+		ivGoBack.setVisibility(ImageView.INVISIBLE);
+		ivBtnSet.setImageResource(R.drawable.settings_button);
+		layBtnSet.setOnClickListener(new OnClickListener() {
+			@Override
+			public void onClick(View view) {
+				goToSettingsActivity();
+			}
+		});
 	}
 
-    private void initTitleLayout() {
-        go_back = (ImageView) findViewById(R.id.go_back);
-        nb_title = (TextView) findViewById(R.id.nb_title);
-        btn_set = (ImageView) findViewById(R.id.btn_set);
-        lstViProgramme = (ListView) findViewById(R.id.processList);
-        btnTest = (Button) findViewById(R.id.test);
-        layBtnSet = (LinearLayout) findViewById(R.id.lay_btn_set);
-    }
+	private void initTitleLayout() {
+		ivGoBack = (ImageView) findViewById(R.id.go_back);
+		nbTitle = (TextView) findViewById(R.id.nb_title);
+		ivBtnSet = (ImageView) findViewById(R.id.btn_set);
+		lstViProgramme = (ListView) findViewById(R.id.processList);
+		btnTest = (Button) findViewById(R.id.test);
+		layBtnSet = (LinearLayout) findViewById(R.id.lay_btn_set);
+	}
 
 	/**
 	 * customized BroadcastReceiver
@@ -257,28 +258,28 @@ public class MainPageActivity extends Activity {
 	 */
 	public boolean onKeyDown(int keyCode, KeyEvent event) {
 		if (keyCode == KeyEvent.KEYCODE_BACK) {
-            if ((System.currentTimeMillis() - mExitTime) > 2000) {
-                    Toast.makeText(this, R.string.quite_alert, Toast.LENGTH_SHORT).show();
-                    mExitTime = System.currentTimeMillis();
-            } else {
-            		if (monitorService != null) {
+			if ((System.currentTimeMillis() - mExitTime) > 2000) {
+				Toast.makeText(this, R.string.quite_alert, Toast.LENGTH_SHORT).show();
+				mExitTime = System.currentTimeMillis();
+			} else {
+				if (monitorService != null) {
 					Log.d(LOG_TAG, "stop service");
 					stopService(monitorService);
 				}
-                Log.d(LOG_TAG, "exit Emmagee");
-                finish();
-            }
-            return true;
+				Log.d(LOG_TAG, "exit Emmagee");
+				finish();
+			}
+			return true;
 		}
 		return super.onKeyDown(keyCode, event);
 	}
 
-    private void goToSettingsActivity() {
-        Intent intent = new Intent();
-        intent.setClass(MainPageActivity.this, SettingsActivity.class);
-        intent.putExtra("settingTempFile", settingTempFile);
-        startActivityForResult(intent, Activity.RESULT_FIRST_USER);
-    }
+	private void goToSettingsActivity() {
+		Intent intent = new Intent();
+		intent.setClass(MainPageActivity.this, SettingsActivity.class);
+		intent.putExtra("settingTempFile", settingTempFile);
+		startActivityForResult(intent, Activity.RESULT_FIRST_USER);
+	}
 
 	/**
 	 * customizing adapter.
@@ -321,19 +322,19 @@ public class MainPageActivity extends Activity {
 
 		@Override
 		public View getView(int position, View convertView, ViewGroup parent) {
-            Programe pr = (Programe) programe.get(position);
+			Programe pr = (Programe) programe.get(position);
 			Viewholder holder = new Viewholder();
 			final int i = position;
 			convertView = MainPageActivity.this.getLayoutInflater().inflate(R.layout.list_item, null);
 
-            holder.imgViAppIcon = (ImageView) convertView.findViewById(R.id.image);
-            holder.imgViAppIcon.setImageDrawable(pr.getIcon());
+			holder.imgViAppIcon = (ImageView) convertView.findViewById(R.id.image);
+			holder.imgViAppIcon.setImageDrawable(pr.getIcon());
 
 			holder.txtAppName = (TextView) convertView.findViewById(R.id.text);
-            holder.txtAppName.setText(pr.getProcessName());
+			holder.txtAppName.setText(pr.getProcessName());
 
 			holder.rdoBtnApp = (RadioButton) convertView.findViewById(R.id.rb);
-            holder.rdoBtnApp.setFocusable(false);
+			holder.rdoBtnApp.setFocusable(false);
 			holder.rdoBtnApp.setId(position);
 			holder.rdoBtnApp.setOnCheckedChangeListener(new OnCheckedChangeListener() {
 				@Override
diff --git a/src/com/netease/qa/emmagee/activity/SettingsActivity.java b/src/com/netease/qa/emmagee/activity/SettingsActivity.java
index eb6f9f9aa87ed444d858453e9e43c5694654d32c..9df67aa7ae208a11765851ff45a01f6a1bb60a3a 100644
--- a/src/com/netease/qa/emmagee/activity/SettingsActivity.java
+++ b/src/com/netease/qa/emmagee/activity/SettingsActivity.java
@@ -74,11 +74,11 @@ public class SettingsActivity extends Activity {
 		SeekBar timeBar = (SeekBar) findViewById(R.id.timeline);
 		ImageView btnSave = (ImageView) findViewById(R.id.btn_set);
 		ImageView goBack = (ImageView) findViewById(R.id.go_back);
-		RelativeLayout floating_item = (RelativeLayout) findViewById(R.id.floating_item);
+		RelativeLayout floatingItem = (RelativeLayout) findViewById(R.id.floating_item);
 		LinearLayout layGoBack = (LinearLayout) findViewById(R.id.lay_go_back);
-		
+
 		boolean floatingTag = true;
-		
+
 		btnSave.setVisibility(ImageView.INVISIBLE);
 		try {
 			properties.load(new FileInputStream(settingTempFile));
@@ -112,7 +112,7 @@ public class SettingsActivity extends Activity {
 				int interval = arg0.getProgress() + 1;
 				try {
 					Properties properties = new Properties();
-					properties.load(new FileInputStream(settingTempFile));   
+					properties.load(new FileInputStream(settingTempFile));
 					properties.setProperty("interval", Integer.toString(interval));
 					FileOutputStream fos = new FileOutputStream(settingTempFile);
 					properties.store(fos, "Setting Data");
@@ -122,7 +122,7 @@ public class SettingsActivity extends Activity {
 				}
 			}
 		});
-		
+
 		layGoBack.setOnClickListener(new OnClickListener() {
 			@Override
 			public void onClick(View arg0) {
@@ -151,13 +151,13 @@ public class SettingsActivity extends Activity {
 			}
 		});
 
-		floating_item.setOnClickListener(new OnClickListener() {
+		floatingItem.setOnClickListener(new OnClickListener() {
 			@Override
 			public void onClick(View arg0) {
 				try {
 					chkFloat.setChecked(!chkFloat.isChecked());
 					Properties properties = new Properties();
-					properties.load(new FileInputStream(settingTempFile));  
+					properties.load(new FileInputStream(settingTempFile));
 					properties.setProperty("isfloat", chkFloat.isChecked() ? "true" : "false");
 					FileOutputStream fos = new FileOutputStream(settingTempFile);
 					properties.store(fos, "Setting Data");
diff --git a/src/com/netease/qa/emmagee/utils/CpuInfo.java b/src/com/netease/qa/emmagee/utils/CpuInfo.java
index 0b23596ab7dc9b355d4e258e8c46fe6f7161088f..3b30a95c242a6f04f07b17088d4d17fecd278b57 100644
--- a/src/com/netease/qa/emmagee/utils/CpuInfo.java
+++ b/src/com/netease/qa/emmagee/utils/CpuInfo.java
@@ -106,10 +106,13 @@ public class CpuInfo {
 		} catch (IOException e) {
 			e.printStackTrace();
 		}
-		read_total_cpu_stat();
+		readTotalCpuStat();
 	}
 
-	private void read_total_cpu_stat() {
+	/**
+	 * read stat of each CPU cores
+	 */
+	private void readTotalCpuStat() {
 		try {
 			// monitor total and idle cpu stat of certain process
 			RandomAccessFile cpuInfo = new RandomAccessFile(CPU_STAT, "r");
@@ -142,6 +145,7 @@ public class CpuInfo {
 				while (null != (line = cpuStat.readLine())) {
 					String[] values = line.split(":");
 					if (values[0].contains(INTEL_CPU_NAME)) {
+						cpuStat.close();
 						return values[1];
 					}
 				}
@@ -257,10 +261,14 @@ public class CpuInfo {
 				if (null != totalCpu2 && totalCpu2.size() > 0) {
 					processCpuRatio = fomart.format(100 * ((double) (processCpu - processCpu2) / ((double) (totalCpu.get(0) - totalCpu2.get(0)))));
 					for (int i = 0; i < (totalCpu.size() > totalCpu2.size() ? totalCpu2.size() : totalCpu.size()); i++) {
-						String cpuRatio = fomart.format(100 * ((double) ((totalCpu.get(i) - idleCpu.get(i)) - (totalCpu2.get(i) - idleCpu2.get(i))) / (double) (totalCpu
-								.get(i) - totalCpu2.get(i))));
+						String cpuRatio = "0.00";
+						if (totalCpu.get(i) - totalCpu2.get(i) > 0) {
+							cpuRatio = fomart
+									.format(100 * ((double) ((totalCpu.get(i) - idleCpu.get(i)) - (totalCpu2.get(i) - idleCpu2.get(i))) / (double) (totalCpu
+											.get(i) - totalCpu2.get(i))));
+						}
 						totalCpuRatio.add(cpuRatio);
-						totalCpuBuffer.append(cpuRatio+",");
+						totalCpuBuffer.append(cpuRatio + ",");
 					}
 				} else {
 					processCpuRatio = "0";
@@ -271,7 +279,7 @@ public class CpuInfo {
 					idleCpu2 = (ArrayList<Long>) idleCpu.clone();
 				}
 				// 多核cpu的值写入csv文件中
-				for(int i =0;i<getCpuNum()-totalCpuRatio.size()+1;i++){
+				for (int i = 0; i < getCpuNum() - totalCpuRatio.size() + 1; i++) {
 					totalCpuBuffer.append("0.00,");
 				}
 				long pidMemory = mi.getPidMemorySize(pid, context);
@@ -287,10 +295,12 @@ public class CpuInfo {
 					// whether certain device supports traffic statics or not
 					if (traffic == -1) {
 						EmmageeService.bw.write(mDateTime2 + "," + pMemory + "," + percent + "," + fMemory + "," + processCpuRatio + ","
-								+ totalCpuBuffer.toString() + "N/A" + "," + totalBatt + "," + currentBatt + "," + temperature + "," + voltage + "\r\n");
+								+ totalCpuBuffer.toString() + "N/A" + "," + totalBatt + "," + currentBatt + "," + temperature + "," + voltage
+								+ "\r\n");
 					} else {
 						EmmageeService.bw.write(mDateTime2 + "," + pMemory + "," + percent + "," + fMemory + "," + processCpuRatio + ","
-								+ totalCpuBuffer.toString() + traffic + "," + totalBatt + "," + currentBatt + "," + temperature + "," + voltage + "\r\n");
+								+ totalCpuBuffer.toString() + traffic + "," + totalBatt + "," + currentBatt + "," + temperature + "," + voltage
+								+ "\r\n");
 					}
 					totalCpu2 = (ArrayList<Long>) totalCpu.clone();
 					processCpu2 = processCpu;