android studio电话簿代码

很抱歉，由于电话簿应用程序包含大量的代码和文件，无法在这里提供完整的代码。但是，我可以给您提供一些关于如何创建电话簿应用程序的指导：

1. 创建一个新的Android Studio项目并添加必要的依赖库。

2. 创建一个数据模型类来表示联系人的信息，例如：

public class Contact {
    private int id;
    private String name;
    private String phone;
    // getters and setters
}

3. 使用SQLite数据库来存储联系人信息，例如：

public class ContactDatabaseHelper extends SQLiteOpenHelper {
    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "contacts.db";
    private static final String TABLE_CONTACTS = "contacts";
    private static final String COLUMN_ID = "_id";
    private static final String COLUMN_NAME = "name";
    private static final String COLUMN_PHONE = "phone";

    public ContactDatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
                + COLUMN_ID + " INTEGER PRIMARY KEY," + COLUMN_NAME + " TEXT,"
                + COLUMN_PHONE + " TEXT" + ")";
        db.execSQL(CREATE_CONTACTS_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
        onCreate(db);
    }

    public void addContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(COLUMN_NAME, contact.getName());
        values.put(COLUMN_PHONE, contact.getPhone());
        db.insert(TABLE_CONTACTS, null, values);
        db.close();
    }

    public List<Contact> getAllContacts() {
        List<Contact> contactList = new ArrayList<Contact>();
        String selectQuery = "SELECT  * FROM " + TABLE_CONTACTS;
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);
        if (cursor.moveToFirst()) {
            do {
                Contact contact = new Contact();
                contact.setId(Integer.parseInt(cursor.getString(0)));
                contact.setName(cursor.getString(1));
                contact.setPhone(cursor.getString(2));
                contactList.add(contact);
            } while (cursor.moveToNext());
        }
        return contactList;
    }

    public void deleteContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_CONTACTS, COLUMN_ID + " = ?",
                new String[] { String.valueOf(contact.getId()) });
        db.close();
    }
}

4. 在布局文件中添加RecyclerView和CardView来显示联系人列表，例如：

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

<androidx.cardview.widget.CardView
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    app:cardBackgroundColor="@color/colorPrimary"
    app:cardCornerRadius="30dp"
    app:cardElevation="6dp"
    app:cardUseCompatPadding="true"
    app:contentPadding="10dp">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_add_white_24dp" />
</androidx.cardview.widget.CardView>

5. 创建一个活动来显示联系人列表和添加新联系人，例如：

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    private ContactAdapter adapter;
    private List<Contact> contactList = new ArrayList<>();
    private ContactDatabaseHelper db;

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

        recyclerView = findViewById(R.id.recyclerView);
        adapter = new ContactAdapter(this, contactList);
        recyclerView.setAdapter(adapter);

        db = new ContactDatabaseHelper(this);
        contactList.addAll(db.getAllContacts());
        adapter.notifyDataSetChanged();
    }

    public void addContact(View view) {
        Intent intent = new Intent(this, AddContactActivity.class);
        startActivity(intent);
    }

    @Override
    protected void onResume() {
        super.onResume();
        contactList.clear();
        contactList.addAll(db.getAllContacts());
        adapter.notifyDataSetChanged();
    }
}

6. 创建一个活动来添加新联系人，例如：

public class AddContactActivity extends AppCompatActivity {
    private EditText inputName, inputPhone;
    private ContactDatabaseHelper db;

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

        inputName = findViewById(R.id.inputName);
        inputPhone = findViewById(R.id.inputPhone);

        db = new ContactDatabaseHelper(this);
    }

    public void saveContact(View view) {
        String name = inputName.getText().toString().trim();
        String phone = inputPhone.getText().toString().trim();

        if (!name.isEmpty() && !phone.isEmpty()) {
            Contact contact = new Contact();
            contact.setName(name);
            contact.setPhone(phone);
            db.addContact(contact);
            finish();
        } else {
            Toast.makeText(this, "Please enter name and phone", Toast.LENGTH_SHORT).show();
        }
    }
}

7. 创建一个适配器类来绑定联系人列表中的数据，例如：

public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.MyViewHolder> {
    private Context context;
    private List<Contact> contactList;
    private ContactDatabaseHelper db;

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

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.contact_item, parent, false);
        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        final Contact contact = contactList.get(position);
        holder.name.setText(contact.getName());
        holder.phone.setText(contact.getPhone());

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(context, EditContactActivity.class);
                intent.putExtra("id", contact.getId());
                intent.putExtra("name", contact.getName());
                intent.putExtra("phone", contact.getPhone());
                context.startActivity(intent);
            }
        });

        holder.call.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_CALL);
                intent.setData(Uri.parse("tel:" + contact.getPhone()));
                if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.CALL_PHONE}, 1);
                    return;
                }
                context.startActivity(intent);
            }
        });
    }

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

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView name, phone;
        public ImageView call;

        public MyViewHolder(View view) {
            super(view);
            name = view.findViewById(R.id.name);
            phone = view.findViewById(R.id.phone);
            call = view.findViewById(R.id.call);

            call.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int position = getAdapterPosition();
                    Contact contact = contactList.get(position);
                    Intent intent = new Intent(Intent.ACTION_CALL);
                    intent.setData(Uri.parse("tel:" + contact.getPhone()));
                    if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                        ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.CALL_PHONE}, 1);
                        return;
                    }
                    context.startActivity(intent);
                }
            });
        }
    }
}

希望这些代码能对您有所帮助！