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

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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
• 总结

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前言

你们好，我是oy，介绍一个简易日记APP。

一、效果

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

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity">    <com.google.android.material.appbar.AppBarLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <androidx.appcompat.widget.Toolbar            android:id="@+id/toolbar"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:background="?attr/colorPrimary"            android:minHeight="?attr/actionBarSize"            android:fitsSystemWindows="true"            android:theme="@style/Widget.AppCompat.Toolbar"            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>    com.google.android.material.appbar.AppBarLayout>    <FrameLayout        android:id="@+id/content"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"/>    <com.google.android.material.bottomnavigation.BottomNavigationView        android:id="@+id/navigation_bottom"        android:layout_width="match_parent"        android:layout_height="wrap_content"        app:menu="@menu/menu_navigation"        android:background="?android:attr/windowBackground"/>LinearLayout>

2. 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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent" android:layout_height="match_parent"    android:orientation="vertical">    <androidx.recyclerview.widget.RecyclerView        android:id="@+id/diaries_list"        android:layout_width="match_parent"        android:layout_height="wrap_content"/>RelativeLayout>

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

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginTop="10dp"        android:layout_marginStart="10dp"        android:layout_marginEnd="10dp"        android:orientation="vertical">        <EditText            android:id="@+id/edit_add_title"            android:hint="@string/add_title_hint"            android:minLines="1"            android:layout_width="match_parent"            android:layout_height="wrap_content" />    LinearLayout>    <LinearLayout        android:id="@+id/edit_layout"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:layout_marginTop="5dp"        android:layout_marginStart="10dp"        android:layout_marginEnd="10dp"        android:layout_marginBottom="10dp">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:paddingStart="5dp"            android:paddingTop="5dp"            android:paddingEnd="5dp"            android:paddingBottom="5dp"            android:background="@drawable/edit_background">            <EditText                android:id="@+id/edit_add_desc"                android:hint="@string/add_title_description"                android:gravity="top"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:scrollbars="vertical"                android:background="@null"/>        LinearLayout>    LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:orientation="horizontal">        <Button            android:id="@+id/add_diary_confirm"            android:text="@string/btn_ok"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>    LinearLayout>LinearLayout>

3. 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

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".view.LoginDirectActivity">    <Button        android:id="@+id/btn_login2_comeIn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginStart="40dp"        android:layout_marginEnd="40dp"        android:text="进入"        app:layout_constraintBottom_toTopOf="@+id/guideline5"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent" />    <LinearLayout        android:id="@+id/linearLayout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginStart="40dp"        android:layout_marginEnd="40dp"        android:gravity="center_vertical"        android:orientation="horizontal"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent"        app:layout_constraintTop_toTopOf="@+id/guideline7">        <ImageView            android:layout_width="32dp"            android:layout_height="32dp"            android:src="@mipmap/come_in_key" />        <EditText            android:id="@+id/edit_login2_input_text"            android:hint="输入您的密码"            android:inputType="textPassword"            android:layout_width="match_parent"            android:layout_height="wrap_content" />    LinearLayout>    <androidx.constraintlayout.widget.Guideline        android:id="@+id/guideline4"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal"        app:layout_constraintGuide_percent="0.22" />    <androidx.constraintlayout.widget.Guideline        android:id="@+id/guideline5"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal"        app:layout_constraintGuide_percent="0.58" />    <TextView        android:id="@+id/tv_login2_password_title"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:text="输入密码"        android:textSize="30sp"        android:textStyle="bold"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintStart_toStartOf="parent"        app:layout_constraintTop_toTopOf="@+id/guideline4" />    <androidx.constraintlayout.widget.Guideline        android:id="@+id/guideline7"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal"        app:layout_constraintGuide_percent="0.4" />    <TextView        android:id="@+id/tv_setPsw"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="设置密码"        android:textStyle="bold"        app:layout_constraintEnd_toEndOf="@+id/linearLayout"        app:layout_constraintTop_toBottomOf="@+id/linearLayout" />androidx.constraintlayout.widget.ConstraintLayout>

4. 使用SharedPrefrenced存储日记内容及标题。

public final class SharedPreferencesUtils {    private static final SimpleArrayMap<String, SharedPreferencesUtils> 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();    }}

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总结

以上就是今天讲的内容，本文仅仅简单介绍了Android日记APP，需要掌握上述知识点，能够较好的理解此应用逻辑。

来源地址：https://blog.csdn.net/m0_49534667/article/details/128087389