diff --git a/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMCacheToolkit.java b/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMCacheToolkit.java
index 290f014..3098f14 100644
--- a/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMCacheToolkit.java
+++ b/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMCacheToolkit.java
@@ -1,130 +1,141 @@
-/**
- * probject:cim-android-sdk
- * @version 2.1.0
- * 
- * @author 3979434@qq.com
- */ 
-package com.farsunset.cim.sdk.android;
-
-import android.content.Context;
-import android.database.Cursor;
-import android.database.sqlite.SQLiteDatabase;
-import android.database.sqlite.SQLiteOpenHelper;
-
-class CIMCacheToolkit extends SQLiteOpenHelper {
-
-	private static final String DATABASE_NAME  = "CIM_CONFIG_INFO.db";
-	private static final int DATABASE_VERSION  = 20160416;
-
-	private static final String TABLE_SQL  = "CREATE TABLE IF NOT EXISTS T_CIM_CONFIG (KEY VARCHAR(64) PRIMARY KEY,VALUE TEXT)";
-
-	private static final String DELETE_SQL  = "DELETE FROM T_CIM_CONFIG WHERE KEY = ?";
-
-	private static final String SAVE_SQL  = "INSERT INTO T_CIM_CONFIG (KEY,VALUE) VALUES(?,?)";
-
-	private static final String QUERY_SQL  = "SELECT VALUE FROM T_CIM_CONFIG WHERE KEY = ?";
-
-	public static final String CIM_CONFIG_INFO  = "CIM_CONFIG_INFO";
-	
-	public static final String KEY_ACCOUNT = "KEY_ACCOUNT";
-	
-	public static final String KEY_MANUAL_STOP = "KEY_MANUAL_STOP";
-	
-	public static final String KEY_CIM_DESTROYED = "KEY_CIM_DESTROYED";
-	
-	public static final String KEY_CIM_SERVIER_HOST = "KEY_CIM_SERVIER_HOST";
-
-	public static final String KEY_CIM_SERVIER_PORT = "KEY_CIM_SERVIER_PORT";
-	
-	public static final String KEY_CIM_CONNECTION_STATE = "KEY_CIM_CONNECTION_STATE";
-
-	static  CIMCacheToolkit toolkit;
-	public static CIMCacheToolkit getInstance(Context context){
-         if (toolkit==null){
-			 toolkit = new CIMCacheToolkit(context);
-		 }
-		return toolkit;
-	}
-	public CIMCacheToolkit(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
-		super(context, name, factory, version);
-	}
-
-	public CIMCacheToolkit(Context context){
-		this(context, DATABASE_NAME,null, DATABASE_VERSION);
-	}
-
-
-
-	public  void remove(String key)
-	{
-		SQLiteDatabase database = toolkit.getWritableDatabase();
-		database.execSQL(DELETE_SQL,new String[]{key});
-		database.close();
-		toolkit.close();
-		toolkit = null;
-	}
-
-
-	public  void putString(String key,String value)
-	{
-		SQLiteDatabase database = toolkit.getWritableDatabase();
-		database.execSQL(DELETE_SQL,new String[]{key});
-		database.execSQL(SAVE_SQL, new String[]{key, value});
-		database.close();
-
-		toolkit.close();
-		toolkit = null;
-
-	}
-	
-	public  String getString(String key)
-	{
-		String value = null;
-		SQLiteDatabase database = toolkit.getWritableDatabase();
-		Cursor cursor = database.rawQuery(QUERY_SQL, new String[]{key});
-		if (cursor!=null&&cursor.moveToFirst())
-		{
-			value = cursor.getString(0);
-		}
-
-		cursor.close();
-		database.close();
-		toolkit.close();
-		toolkit = null;
-		
-		return value;
-	}
-	
-	public  void putBoolean(String key,boolean value)
-	{
-		putString(key,Boolean.toString(value));
-	}
-	
-	public  boolean getBoolean(String key)
-	{
-		String value = getString(key);
-		return value == null?false:Boolean.parseBoolean(value);
-	}
-	
-	
-	public  void putInt(String key,int value)
-	{
-		putString(key, String.valueOf(value));
-	}
-	
-	public  int getInt(String key)
-	{
-		String value = getString(key);
-		return value == null?0:Integer.parseInt(value);
-	}
-
-	@Override
-	public void onCreate(SQLiteDatabase database) {
-		database.execSQL(TABLE_SQL);
-	}
-
-	@Override
-	public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
-
-	}
-}
+/**
+ * probject:cim-android-sdk
+ * @version 2.1.0
+ * 
+ * @author 3979434@qq.com
+ */ 
+package com.farsunset.cim.sdk.android;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+class CIMCacheToolkit extends SQLiteOpenHelper {
+
+	private static final String DATABASE_NAME  = "CIM_CONFIG_INFO.db";
+	private static final int DATABASE_VERSION  = 20160416;
+
+	private static final String TABLE_SQL  = "CREATE TABLE IF NOT EXISTS T_CIM_CONFIG (KEY VARCHAR(64) PRIMARY KEY,VALUE TEXT)";
+
+	private static final String DELETE_SQL  = "DELETE FROM T_CIM_CONFIG WHERE KEY = ?";
+
+	private static final String SAVE_SQL  = "INSERT INTO T_CIM_CONFIG (KEY,VALUE) VALUES(?,?)";
+
+	private static final String QUERY_SQL  = "SELECT VALUE FROM T_CIM_CONFIG WHERE KEY = ?";
+
+	public static final String CIM_CONFIG_INFO  = "CIM_CONFIG_INFO";
+	
+	public static final String KEY_ACCOUNT = "KEY_ACCOUNT";
+	
+	public static final String KEY_MANUAL_STOP = "KEY_MANUAL_STOP";
+	
+	public static final String KEY_CIM_DESTROYED = "KEY_CIM_DESTROYED";
+	
+	public static final String KEY_CIM_SERVIER_HOST = "KEY_CIM_SERVIER_HOST";
+
+	public static final String KEY_CIM_SERVIER_PORT = "KEY_CIM_SERVIER_PORT";
+	
+	public static final String KEY_CIM_CONNECTION_STATE = "KEY_CIM_CONNECTION_STATE";
+    private static  CIMCacheToolkit toolkit;
+	private SQLiteDatabase mSQLiteDatabase;
+	public synchronized static CIMCacheToolkit getInstance(Context context){
+         if (toolkit==null){
+			 toolkit = new CIMCacheToolkit(context);
+		 }
+		return toolkit;
+	}
+	
+	 
+	public  CIMCacheToolkit(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
+		super(context, name, factory, version);
+	}
+
+	public CIMCacheToolkit(Context context){
+		this(context, DATABASE_NAME,null, DATABASE_VERSION);
+	}
+
+
+
+	public synchronized void remove(String key)
+	{
+		getSQLiteDatabase().execSQL(DELETE_SQL,new String[]{key});
+	}
+
+
+	public synchronized void putString(String key,String value)
+	{
+		getSQLiteDatabase().execSQL(DELETE_SQL,new String[]{key});
+		getSQLiteDatabase().execSQL(SAVE_SQL, new String[]{key, value});
+
+	}
+	
+	public synchronized String getString(String key)
+	{
+		String value = null;
+		Cursor cursor = getSQLiteDatabase().rawQuery(QUERY_SQL, new String[]{key});
+		if (cursor!=null&&cursor.moveToFirst())
+		{
+			value = cursor.getString(0);
+			cursor.close();
+		}
+
+		
+		
+		return value;
+	}
+	
+	public  void putBoolean(String key,boolean value)
+	{
+		putString(key,Boolean.toString(value));
+	}
+	
+	public  boolean getBoolean(String key)
+	{
+		String value = getString(key);
+		return value == null?false:Boolean.parseBoolean(value);
+	}
+	
+	
+	public  void putInt(String key,int value)
+	{
+		putString(key, String.valueOf(value));
+	}
+	
+	public  int getInt(String key)
+	{
+		String value = getString(key);
+		return value == null?0:Integer.parseInt(value);
+	}
+
+	@Override
+	public void onCreate(SQLiteDatabase database) {
+		database.execSQL(TABLE_SQL);
+	}
+
+	
+	public  static synchronized  void destroy(){
+		if (toolkit!=null){
+			try{toolkit.mSQLiteDatabase.close();}catch(Exception e){}
+			try{toolkit.close();}catch(Exception e){}
+		}
+		
+	}
+	
+	
+	private SQLiteDatabase getSQLiteDatabase(){
+		if(mSQLiteDatabase!=null){
+			return mSQLiteDatabase;
+		}else
+		{
+			mSQLiteDatabase =  getWritableDatabase();
+		}
+		return  mSQLiteDatabase;
+	}
+	
+	
+	@Override
+	public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
+
+	}
+}