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app/src/main/java/top/iletter/lvnote/FragmentProfile.java

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+package top.iletter.lvnote;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+public class FragmentProfile extends Fragment {
+
+    // ⚠️ 必须有无参构造函数！
+    public FragmentProfile() {
+        // Required empty public constructor
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             @Nullable ViewGroup container,
+                             @Nullable Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_profile, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        // 安全地操作 View
+        TextView movieCount = view.findViewById(R.id.tv_movie_count);
+        TextView bookCount = view.findViewById(R.id.tv_book_count);
+
+        if (movieCount != null) movieCount.setText("24");
+        if (bookCount != null) bookCount.setText("18");
+    }
+}