Android studio课程设计开发实现---日记APP

Android studio课程设计开发实现—日记APP

文章目录

• Android studio课程设计开发实现---日记APP
• 前言
• 一、效果
• 二、功能介绍
• • 1.主要功能
  • 2.涉及知识点
  • 三、实现思路
  • 下载链接
  • 总结

    ---

    前言

    你们好，我是oy，介绍一个简易日记APP。

    一、效果

    1.启动页、引导页及登陆注册

    2.日记相关功能

    3.个人中心界面

    二、功能介绍

    1.主要功能

    1. 实现应用启动页及引导页
    2. 实现设置密码进入APP，对密码进行加密处理
    3. 实现底部导航栏，分为日记列表，新建日记，个人中心模块
    4. 实现对日记删除、修改、新增的基础功能
    5. 实现圆形头像，通过相册及拍照并裁剪图片设置头像。可实时保存。
    6. 实现网络更新个人中心美图。
    7. 对密码展示及关闭，跳转应用设置界面
    8. 动态获取拍照及相册访问权限

       …

       …

    2.涉及知识点

    1. activity与fragment数据传递、页面更新、相互跳转。
    2. SharedPrefrenced存储、文件存储、文件加密。
    3. Android应用权限获取及设置
    4. 控件的使用：Button、EditText、AlertDialog、Imageview、ImageButton、viewPager2、Toolbar、RecycleView、NavigationButton等
    5. 布局的使用：LinearLayout、ConstraintLayout、RelativeLayout等
    6. 调用Android系统应用
    7. 自定义View：底部弹窗（比较复杂）、圆形头像
    8. Glide框架使用：网络加载图片
    9. Android框架：MVC

       …

       …

    三、实现思路

    1. MainActivity中使用BottomNavigationView、ViewPager2、Toolbar实现。

    public class MainActivity extends AppCompatActivity {    private BottomNavigationView bottomNavigationView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initToolbar();        initFragment();        initNavigationBottom();    }    @SuppressLint("ResourceAsColor")    private void initNavigationBottom() {        bottomNavigationView = findViewById(R.id.navigation_bottom);        bottomNavigationView.setItemIconTintList(null);        bottomNavigationView.setOnNavigationItemSelectedListener(itemSelectedListener);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        return super.onCreateOptionsMenu(menu);    }    private void initFragment() {        DiariesFragment diariesFragment = getDiariesFragment();        if (diariesFragment == null) {            diariesFragment = new DiariesFragment();            ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), diariesFragment, R.id.content);        }    }    private DiariesFragment getDiariesFragment() {        return (DiariesFragment) getSupportFragmentManager().findFragmentById(R.id.content);    }    private void initToolbar() {        //设置顶部状态栏为透明        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        Toolbar toolbar = findViewById(R.id.toolbar);        setSupportActionBar(toolbar);    }    private final BottomNavigationView.OnNavigationItemSelectedListener itemSelectedListener = item -> {        switch (item.getItemId()) {            case R.id.menu_diary:                MeController.setToolbarVisibility(this);                ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(), getSupportFragmentManager().findFragmentById(R.id.content));                ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), new DiariesFragment(), R.id.content);                break;            case R.id.menu_me:                findViewById(R.id.toolbar).setVisibility(View.GONE);                ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(), getSupportFragmentManager().findFragmentById(R.id.content));                ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), new MeFragment(), R.id.content);                break;            case R.id.menu_new:                bottomNavigationView.setVisibility(View.GONE);                MeController.setToolbarVisibility(this);                ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(), getSupportFragmentManager().findFragmentById(R.id.content));                ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), new AddDiaryFragment(), R.id.content);                break;        }        return true;    };}

    MainActivity的layout

    1. ViewPager2中切换不同fragment，对应导航栏新增日记、个人中心及日记列表。

    public class DiariesFragment extends Fragment {    private DiariesController mController;    @Override    public void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mController = new DiariesController(this);    }        @Nullable    @Override    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View root = inflater.inflate(R.layout.fragment_diaries, container, false);        mController.setDiariesList(root.findViewById(R.id.diaries_list));        return root;    }    @Override    public void onResume() {        super.onResume();        mController.loadDiaries();    }}

    DiariesFragment的layout

    public class AddDiaryFragment extends Fragment implements View.OnClickListener {    private AddDiaryController mController;    private View edit_layout;    private Button btn_confirm;    private EditText edit_title;    private EditText edit_desc;    @Override    public void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mController = new AddDiaryController(this);    }    private void initView(View view) {        btn_confirm = view.findViewById(R.id.add_diary_confirm);        btn_confirm.setOnClickListener(this);        edit_title = view.findViewById(R.id.edit_add_title);        edit_desc = view.findViewById(R.id.edit_add_desc);        edit_layout = view.findViewById(R.id.edit_layout);        edit_layout.setOnClickListener(this);    }    @Override    public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {        inflater.inflate(R.menu.menu_cancel, menu);    }    @Override    public boolean onOptionsItemSelected(@NonNull MenuItem item) {        switch (item.getItemId()) {            case R.id.menu_cancel:                mController.closeWriteDiary(getActivity().getSupportFragmentManager(), this);                mController.setNavigationVisibility();                return true;        }        return false;    }    @Nullable    @Override    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View root = inflater.inflate(R.layout.fragment_add_diary, container, false);        initView(root);        return root;    }    @Override    public void onDestroy() {        super.onDestroy();    }    @Override    public void onClick(View view) {        switch (view.getId()) {            case R.id.add_diary_confirm:                mController.addDiaryToRepository(edit_title.getText().toString().trim(), edit_desc.getText().toString().trim());                mController.setNavigationVisibility();                mController.closeWriteDiary(getActivity().getSupportFragmentManager(), this);                break;            case R.id.edit_layout:                mController.changeFocus(edit_desc);                break;        }    }}

    AddDiaryFragment的layout

    1. 将应用密码加密保存与文件中。每次登陆获取密码并对比。

    public class LoginDirectActivity extends AppCompatActivity implements View.OnClickListener {    private EditText edit_input_text;    private Button btn_comeIn;    private TextView tv_setPsw;    private static final String TAG = "Login2Activity";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_direct_login);        bindView();    }    private void bindView() {        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        edit_input_text = findViewById(R.id.edit_login2_input_text);        btn_comeIn = findViewById(R.id.btn_login2_comeIn);        btn_comeIn.setOnClickListener(this);        tv_setPsw = findViewById(R.id.tv_setPsw);        tv_setPsw.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.tv_setPsw:                Intent setPsw_intent = new Intent(LoginDirectActivity.this, LoginActivity.class);                startActivity(setPsw_intent);                LoginDirectActivity.this.finish();//                overridePendingTransition(R.anim.out_to_left,R.anim.in_from_right);                break;            case R.id.btn_login2_comeIn:                String psw = edit_input_text.getText().toString().trim();                if (psw.isEmpty()) {                    Toast.makeText(this, "密码不能为空!", Toast.LENGTH_SHORT).show();                    return;                }                String readInfoByContext = FileUtils.readInfoByContext(this);                if (psw.equals(readInfoByContext)) {                    Toast.makeText(this, "登录成功!", Toast.LENGTH_SHORT).show();                    Intent intent = new Intent(this, MainActivity.class);                    startActivity(intent);//                    overridePendingTransition(R.anim.out_to_left,R.anim.in_from_right);                } else {                    Toast.makeText(this, "密码不正确!", Toast.LENGTH_SHORT).show();                }                break;        }    }}

    LoginDirectActivity 的layout

    1. 使用SharedPrefrenced存储日记内容及标题。

    public final class SharedPreferencesUtils {    private static final SimpleArrayMap mCaches = new SimpleArrayMap();    private SharedPreferences mSharedPreferences;    private SharedPreferencesUtils(final String spName, final int mode) {        mSharedPreferences = YyApplication.get().getSharedPreferences(spName, mode);    }    public static SharedPreferencesUtils getInstance(String spName) {        SharedPreferencesUtils utils = mCaches.get(spName);        if (utils == null) {            utils = new SharedPreferencesUtils(spName, Context.MODE_PRIVATE);        }        return utils;    }    public void put(final String key, final String value) {        mSharedPreferences.edit().putString(key, value).apply();    }    public String get(final String key) {        return mSharedPreferences.getString(key, "");    }    public void remove(final String key) {        mSharedPreferences.edit().remove(key).apply();    }}

    下载链接

    源码下载：https://pan.baidu.com/s/1bzSSuPrtlq1m5UG29TWvoQ

    提取码：1111 (好像不需要)

    总结