ADD file via upload

NavActivity.java

@@ -0,0 +1,72 @@
+package com.grassroots.booktracker.activity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.grassroots.booktracker.R;
+
+public class NavActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_nav);
+        TextView tvBack = findViewById(R.id.tv_back);
+        tvBack.setVisibility(View.GONE);
+        TextView tvTitle = findViewById(R.id.tv_main_title);
+        tvTitle.setText("页面导航");
+
+        Button btnUserInfo = findViewById(R.id.btn_user_info);
+        btnUserInfo.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                //创建Intent 对象
+                Intent intent = new Intent(NavActivity.this, UserActivity.class);
+                //启动Activity
+                startActivity(intent);
+            }
+        });
+        Button btnBookRecommend = findViewById(R.id.btn_book_recommend);
+        btnBookRecommend.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                //创建Intent 对象
+                Intent intent = new Intent(NavActivity.this, SuggestActivity.class);
+                //启动Activity
+                startActivity(intent);
+            }
+        });
+        Button btnNoticeRemind = findViewById(R.id.btn_notice_remind);
+        btnNoticeRemind.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Toast.makeText(NavActivity.this, "功能开发中", Toast.LENGTH_SHORT).show();
+            }
+        });
+        Button btnPermissionManage = findViewById(R.id.btn_permission_manage);
+        btnPermissionManage.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Toast.makeText(NavActivity.this, "功能开发中", Toast.LENGTH_SHORT).show();
+            }
+        });
+
+        Button btnLogout = findViewById(R.id.btn_logout);
+        btnLogout.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                //创建Intent 对象
+                Intent intent = new Intent(NavActivity.this, LoginActivity.class);
+                //启动Activity
+                startActivity(intent);
+                finish();
+            }
+        });
+    }
+}