首页 > 软件编程 > Android > Android日记APP

Android笔记设计范例之日记APP实现全流程

2023-01-20 11:37:40 作者：勤奋的oyoung

这篇文章主要介绍了Android笔记设计范例之日记APP实现全流程，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习吧

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

实现应用启动页及引导页
实现设置密码进入APP，对密码进行加密处理
实现底部导航栏，分为日记列表，新建日记，个人中心模块
实现对日记删除、修改、新增的基础功能
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。
实现网络更新个人中心美图。
对密码展示及关闭，跳转应用设置界面
动态获取拍照及相册访问权限

…

2.涉及知识点

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

…

三、实现思路

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

<?xml version="1.0" encoding="utf-8"?>
<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>

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

<?xml version="1.0" encoding="utf-8"?>
<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

<?xml version="1.0" encoding="utf-8"?>
<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>

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

<?xml version="1.0" encoding="utf-8"?>
<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>

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();
    }
}

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。

到此这篇关于Android笔记设计范例之日记APP实现全流程的文章就介绍到这了,更多相关Android日记APP内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！