diff --git a/app/src/main/java/cc/niushuai/didicheck/MainActivity.java b/app/src/main/java/cc/niushuai/didicheck/MainActivity.java
index f6af166..f13eb5c 100644
--- a/app/src/main/java/cc/niushuai/didicheck/MainActivity.java
+++ b/app/src/main/java/cc/niushuai/didicheck/MainActivity.java
@@ -1,6 +1,5 @@
 package cc.niushuai.didicheck;
 
-import android.content.Context;
 import android.os.Bundle;
 import android.view.View;
 
@@ -18,11 +17,9 @@ import cc.niushuai.didicheck.ui.main.TabsPagerAdapter;
 public class MainActivity extends AppCompatActivity {
 
     private ActivityMainBinding binding;
-    private Context context;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        context = this;
         super.onCreate(savedInstanceState);
 
         // 初始化数据库
@@ -42,7 +39,6 @@ public class MainActivity extends AppCompatActivity {
         swimActionButton.show(true);
         swimActionButton.setLabelText("游泳");
         swimActionButton.setImageDrawable(this.getResources().getDrawable(R.mipmap.fab_icon_swimming, getTheme()));
-//        swimActionButton.setImageIcon(R.mipmap.fab_icon_swimming);
         swimActionButton.setButtonSize(FloatingActionButton.SIZE_NORMAL);
         swimActionButton.setColorNormal(this.getResources().getColor(R.color.white));
         swimActionButton.setColorPressed(this.getResources().getColor(R.color.white));