diff --git a/src/cn/trinea/android/demo/DownloadManagerDemo.java b/src/cn/trinea/android/demo/DownloadManagerDemo.java
index 79ffa6d..ea32f69 100644
--- a/src/cn/trinea/android/demo/DownloadManagerDemo.java
+++ b/src/cn/trinea/android/demo/DownloadManagerDemo.java
@@ -47,7 +47,6 @@ public class DownloadManagerDemo extends BaseActivity {
     private DownloadManagerPro     downloadManagerPro;
     private long                   downloadId           = 0;
 
-    private Context                context;
     private MyHandler              handler;
 
     private DownloadChangeObserver downloadObserver;
@@ -57,7 +56,6 @@ public class DownloadManagerDemo extends BaseActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState, R.layout.download_manager_demo);
 
-        context = getApplicationContext();
         handler = new MyHandler();
         downloadManager = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);
         downloadManagerPro = new DownloadManagerPro(downloadManager);
@@ -71,7 +69,7 @@ protected void onCreate(Bundle savedInstanceState) {
              */
             Uri data = intent.getData();
             if (data != null) {
-                Toast.makeText(getApplicationContext(), data.toString(), Toast.LENGTH_LONG).show();
+                Toast.makeText(context, data.toString(), Toast.LENGTH_LONG).show();
             }
         }
 
diff --git a/src/cn/trinea/android/demo/HttpCacheDemo.java b/src/cn/trinea/android/demo/HttpCacheDemo.java
index bab13c1..26f7696 100644
--- a/src/cn/trinea/android/demo/HttpCacheDemo.java
+++ b/src/cn/trinea/android/demo/HttpCacheDemo.java
@@ -2,7 +2,6 @@
 
 import java.util.Date;
 
-import android.content.Context;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -35,7 +34,6 @@ public class HttpCacheDemo extends BaseActivity {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState, R.layout.http_cache_demo);
 
-        Context context = getApplicationContext();
         // get the singleton instance of HttpCache
         httpCache = CacheManager.getHttpCache(context);
         // or create a new HttpCache, like this:
diff --git a/src/cn/trinea/android/demo/ImageCacheDemo.java b/src/cn/trinea/android/demo/ImageCacheDemo.java
index 23d402a..019b5a8 100644
--- a/src/cn/trinea/android/demo/ImageCacheDemo.java
+++ b/src/cn/trinea/android/demo/ImageCacheDemo.java
@@ -4,7 +4,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import android.content.Context;
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.os.Environment;
@@ -46,7 +45,6 @@ public class ImageCacheDemo extends BaseActivity {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState, R.layout.image_cache_demo);
 
-        Context context = getApplicationContext();
         parentLayout = (RelativeLayout)findViewById(R.id.image_cache_parent_layout);
         initImageUrlList();
         IMAGE_CACHE.initData(this, TAG_CACHE);
diff --git a/src/cn/trinea/android/demo/ImagePagerFragment.java b/src/cn/trinea/android/demo/ImagePagerFragment.java
index 4e09aec..4f797c0 100644
--- a/src/cn/trinea/android/demo/ImagePagerFragment.java
+++ b/src/cn/trinea/android/demo/ImagePagerFragment.java
@@ -45,7 +45,7 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle sa
         imageIdList.add(R.drawable.banner2);
         imageIdList.add(R.drawable.banner3);
         imageIdList.add(R.drawable.banner4);
-        viewPager.setAdapter(new ImagePagerAdapter(getActivity().getApplicationContext(), imageIdList));
+        viewPager.setAdapter(new ImagePagerAdapter(context, imageIdList));
         indicator.setViewPager(viewPager);
 
         viewPager.setInterval(2000);
diff --git a/src/cn/trinea/android/demo/ImageSDCardCacheDemo.java b/src/cn/trinea/android/demo/ImageSDCardCacheDemo.java
index dba54b7..ce00d28 100644
--- a/src/cn/trinea/android/demo/ImageSDCardCacheDemo.java
+++ b/src/cn/trinea/android/demo/ImageSDCardCacheDemo.java
@@ -45,7 +45,6 @@ public class ImageSDCardCacheDemo extends BaseActivity {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState, R.layout.image_sdcard_cache_demo);
 
-        Context context = getApplicationContext();
         initImageUrlList();
         IMAGE_SD_CACHE.initData(context, TAG_CACHE);
         IMAGE_SD_CACHE.setContext(context);
diff --git a/src/cn/trinea/android/demo/ServiceDemo.java b/src/cn/trinea/android/demo/ServiceDemo.java
index f18f4fc..89afb2f 100644
--- a/src/cn/trinea/android/demo/ServiceDemo.java
+++ b/src/cn/trinea/android/demo/ServiceDemo.java
@@ -45,8 +45,7 @@ public class ServiceDemo extends BaseActivity {
                                        */
                                       @Override
                                       public void onServiceDisconnected(ComponentName name) {
-                                          Toast.makeText(getApplicationContext(), "Service disconnect",
-                                                  Toast.LENGTH_SHORT).show();
+                                          Toast.makeText(context, "Service disconnect", Toast.LENGTH_SHORT).show();
                                       }
 
                                       /**
@@ -55,8 +54,7 @@ public void onServiceDisconnected(ComponentName name) {
                                       @Override
                                       public void onServiceConnected(ComponentName name, IBinder service) {
                                           myService = ((MyBinder)service).getService();
-                                          Toast.makeText(getApplicationContext(), "Service Connect", Toast.LENGTH_SHORT)
-                                                  .show();
+                                          Toast.makeText(context, "Service Connect", Toast.LENGTH_SHORT).show();
                                       }
                                   };
 
diff --git a/src/cn/trinea/android/demo/SlideOnePageGalleryDemo.java b/src/cn/trinea/android/demo/SlideOnePageGalleryDemo.java
index 693308d..beb9cde 100644
--- a/src/cn/trinea/android/demo/SlideOnePageGalleryDemo.java
+++ b/src/cn/trinea/android/demo/SlideOnePageGalleryDemo.java
@@ -40,7 +40,7 @@ public void onNothingSelected(AdapterView<?> parent) {
             }
         });
 
-        ImageListAdapter adapter = new ImageListAdapter(getApplicationContext());
+        ImageListAdapter adapter = new ImageListAdapter(context);
         List<Integer> idList = new ArrayList<Integer>();
         idList.add(R.drawable.image1);
         idList.add(R.drawable.image2);