diff --git a/app/src/main/java/me/yluo/ruisiapp/activity/NewPostActivity.java b/app/src/main/java/me/yluo/ruisiapp/activity/NewPostActivity.java
index 7260ec7a..ec749de0 100644
--- a/app/src/main/java/me/yluo/ruisiapp/activity/NewPostActivity.java
+++ b/app/src/main/java/me/yluo/ruisiapp/activity/NewPostActivity.java
@@ -96,10 +96,13 @@ public class NewPostActivity extends BaseActivity implements View.OnClickListene
     private String title;
     private int typeId;
 
+    public static final String FID = "fid";
+    public static final String TITLE = "title";
+
     public static void open(Context context, int fid, String title) {
         Intent intent = new Intent(context, NewPostActivity.class);
-        intent.putExtra("FID", fid);
-        intent.putExtra("TITLE", title);
+        intent.putExtra(FID, fid);
+        intent.putExtra(TITLE, title);
         context.startActivity(intent);
     }
 
@@ -109,8 +112,8 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
         setContentView(R.layout.activity_new_topic);
 
         if (getIntent().getExtras() != null) {
-            fid = getIntent().getExtras().getInt("FID");
-            title = getIntent().getExtras().getString("TITLE");
+            fid = getIntent().getExtras().getInt(FID);
+            title = getIntent().getExtras().getString(TITLE);
         }
 
         if (!TextUtils.isEmpty(title)) {
diff --git a/app/src/main/java/me/yluo/ruisiapp/activity/PostsActivity.java b/app/src/main/java/me/yluo/ruisiapp/activity/PostsActivity.java
index 93565ceb..f67a3fc9 100644
--- a/app/src/main/java/me/yluo/ruisiapp/activity/PostsActivity.java
+++ b/app/src/main/java/me/yluo/ruisiapp/activity/PostsActivity.java
@@ -250,8 +250,8 @@ public void onClick(View view) {
                 } else {
                     if (isLogin()) {
                         Intent i = new Intent(this, NewPostActivity.class);
-                        i.putExtra("fid", fid);
-                        i.putExtra("title", title);
+                        i.putExtra(NewPostActivity.FID, fid);
+                        i.putExtra(NewPostActivity.TITLE, title);
                         startActivityForResult(i, 0);
                     }
                 }
diff --git a/app/src/main/java/me/yluo/ruisiapp/utils/LinkClickHandler.java b/app/src/main/java/me/yluo/ruisiapp/utils/LinkClickHandler.java
index 6088138d..aed93907 100644
--- a/app/src/main/java/me/yluo/ruisiapp/utils/LinkClickHandler.java
+++ b/app/src/main/java/me/yluo/ruisiapp/utils/LinkClickHandler.java
@@ -44,7 +44,7 @@ public static void handleClick(final Context context, String url) {
         } else if (url.contains("forum.php?mod=post&action=newthread")) { //发帖链接
             int fid = GetId.getFroumFid(url);
             Intent i = new Intent(context, NewPostActivity.class);
-            i.putExtra("FID", fid);
+            i.putExtra(NewPostActivity.FID, fid);
             context.startActivity(i);
         } else if (url.contains("member.php?mod=logging&action=login")) {//登陆
             LoginActivity.open(context);