用Android语言写一个通讯录系统 完整代码

很抱歉，由于代码较长，无法在此处完整展示。以下是一个简单的Android通讯录系统的基本代码框架，供您参考：

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private List<Contact> contactList;
    private ContactAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.list_view);
        contactList = new ArrayList<>();
        adapter = new ContactAdapter(MainActivity.this, contactList);
        listView.setAdapter(adapter);

        // 添加联系人按钮点击事件
        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, AddContactActivity.class);
                startActivityForResult(intent, 1);
            }
        });

        // ListView条目点击事件
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
                Contact contact = contactList.get(position);
                Intent intent = new Intent(MainActivity.this, EditContactActivity.class);
                intent.putExtra("contact", contact);
                startActivityForResult(intent, 2);
            }
        });

        // 加载联系人数据
        loadContacts();
    }

    // 加载联系人数据
    private void loadContacts() {
        // TODO: 从数据库或其他数据源中加载联系人数据
        contactList.add(new Contact("张三", "123456789", "zhangsan@example.com"));
        contactList.add(new Contact("李四", "987654321", "lisi@example.com"));
        adapter.notifyDataSetChanged();
    }

    // 添加、编辑、删除联系人后更新ListView
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            if (requestCode == 1) { // 添加联系人
                Contact contact = (Contact) data.getSerializableExtra("contact");
                contactList.add(contact);
                adapter.notifyDataSetChanged();
            } else if (requestCode == 2) { // 编辑联系人
                Contact contact = (Contact) data.getSerializableExtra("contact");
                int position = data.getIntExtra("position", -1);
                if (position != -1) {
                    contactList.set(position, contact);
                    adapter.notifyDataSetChanged();
                }
            } else if (requestCode == 3) { // 删除联系人
                int position = data.getIntExtra("position", -1);
                if (position != -1) {
                    contactList.remove(position);
                    adapter.notifyDataSetChanged();
                }
            }
        }
    }
}

Contact.java

public class Contact implements Serializable {

    private String name;
    private String phone;
    private String email;

    public Contact(String name, String phone, String email) {
        this.name = name;
        this.phone = phone;
        this.email = email;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

ContactAdapter.java

public class ContactAdapter extends BaseAdapter {

    private Context context;
    private List<Contact> contactList;

    public ContactAdapter(Context context, List<Contact> contactList) {
        this.context = context;
        this.contactList = contactList;
    }

    @Override
    public int getCount() {
        return contactList.size();
    }

    @Override
    public Object getItem(int position) {
        return contactList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.contact_item, parent, false);
            holder = new ViewHolder();
            holder.nameTextView = convertView.findViewById(R.id.name_text_view);
            holder.phoneTextView = convertView.findViewById(R.id.phone_text_view);
            holder.emailTextView = convertView.findViewById(R.id.email_text_view);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        Contact contact = contactList.get(position);
        holder.nameTextView.setText(contact.getName());
        holder.phoneTextView.setText(contact.getPhone());
        holder.emailTextView.setText(contact.getEmail());

        return convertView;
    }

    static class ViewHolder {
        TextView nameTextView;
        TextView phoneTextView;
        TextView emailTextView;
    }
}

AddContactActivity.java

public class AddContactActivity extends AppCompatActivity {

    private EditText nameEditText;
    private EditText phoneEditText;
    private EditText emailEditText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_contact);

        nameEditText = findViewById(R.id.name_edit_text);
        phoneEditText = findViewById(R.id.phone_edit_text);
        emailEditText = findViewById(R.id.email_edit_text);

        // 保存按钮点击事件
        Button saveButton = findViewById(R.id.save_button);
        saveButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = nameEditText.getText().toString();
                String phone = phoneEditText.getText().toString();
                String email = emailEditText.getText().toString();
                Contact contact = new Contact(name, phone, email);
                Intent intent = new Intent();
                intent.putExtra("contact", contact);
                setResult(RESULT_OK, intent);
                finish();
            }
        });
    }
}

EditContactActivity.java

public class EditContactActivity extends AppCompatActivity {

    private EditText nameEditText;
    private EditText phoneEditText;
    private EditText emailEditText;
    private Contact contact;
    private int position;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit_contact);

        nameEditText = findViewById(R.id.name_edit_text);
        phoneEditText = findViewById(R.id.phone_edit_text);
        emailEditText = findViewById(R.id.email_edit_text);

        // 获取要编辑的联系人数据
        Intent intent = getIntent();
        contact = (Contact) intent.getSerializableExtra("contact");
        position = intent.getIntExtra("position", -1);
        nameEditText.setText(contact.getName());
        phoneEditText.setText(contact.getPhone());
        emailEditText.setText(contact.getEmail());

        // 保存按钮点击事件
        Button saveButton = findViewById(R.id.save_button);
        saveButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = nameEditText.getText().toString();
                String phone = phoneEditText.getText().toString();
                String email = emailEditText.getText().toString();
                Contact updatedContact = new Contact(name, phone, email);
                Intent intent = new Intent();
                intent.putExtra("contact", updatedContact);
                intent.putExtra("position", position);
                setResult(RESULT_OK, intent);
                finish();
            }
        });

        // 删除按钮点击事件
        Button deleteButton = findViewById(R.id.delete_button);
        deleteButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.putExtra("position", position);
                setResult(RESULT_OK, intent);
                finish();
            }
        });
    }
}

注意：以上代码仅供参考，具体实现过程中需要根据实际需求进行适当的调整和完善。同时，代码中使用了一些第三方库和资源文件，如需要使用请自行添加和替换。