主活动初步编写

Code/LeudaemiaLikeMe/app/src/main/java/com/example/leudaemialikeme/MainActivity.java

@@ -1,10 +1,34 @@
 package com.example.leudaemialikeme;
 
 import android.os.Bundle;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+
+import java.util.List;
 
 public class MainActivity extends AppCompatActivity {
+    //装载Fragment的集合
+    private List<Fragment> fragmentList;
+    //四个tab对应的布局
+    private LinearLayout tabHome;
+    private LinearLayout tabCommunity;
+    private LinearLayout tabMessage;
+    private LinearLayout tabMy;
+    //四个 Tab 对应的 ImageButton
+    private ImageButton imgHome;
+    private ImageButton imgCommunity;
+    private ImageButton imgMessage;
+    private ImageButton imgMy;
+    //四个Tab对应的文本
+    private TextView textHome;
+    private TextView textCommunity;
+    private TextView textMessage;
+    private TextView textMy;
+
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {