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

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。

publicclassMainActivityextendsAppCompatActivity{privateBottomNavigationView bottomNavigationView;@OverrideprotectedvoidonCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initToolbar();initFragment();initNavigationBottom();}@SuppressLint("ResourceAsColor")privatevoidinitNavigationBottom(){
        bottomNavigationView =findViewById(R.id.navigation_bottom);
        bottomNavigationView.setItemIconTintList(null);
        bottomNavigationView.setOnNavigationItemSelectedListener(itemSelectedListener);}@OverridepublicbooleanonCreateOptionsMenu(Menu menu){returnsuper.onCreateOptionsMenu(menu);}privatevoidinitFragment(){DiariesFragment diariesFragment =getDiariesFragment();if(diariesFragment ==null){
            diariesFragment =newDiariesFragment();ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), diariesFragment,R.id.content);}}privateDiariesFragmentgetDiariesFragment(){return(DiariesFragment)getSupportFragmentManager().findFragmentById(R.id.content);}privatevoidinitToolbar(){//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);}privatefinalBottomNavigationView.OnNavigationItemSelectedListener itemSelectedListener = item ->{switch(item.getItemId()){caseR.id.menu_diary:MeController.setToolbarVisibility(this);ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(),getSupportFragmentManager().findFragmentById(R.id.content));ActivityUtils.addFragmentToActivity(getSupportFragmentManager(),newDiariesFragment(),R.id.content);break;caseR.id.menu_me:findViewById(R.id.toolbar).setVisibility(View.GONE);ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(),getSupportFragmentManager().findFragmentById(R.id.content));ActivityUtils.addFragmentToActivity(getSupportFragmentManager(),newMeFragment(),R.id.content);break;caseR.id.menu_new:
                bottomNavigationView.setVisibility(View.GONE);MeController.setToolbarVisibility(this);ActivityUtils.removeFragmentTOActivity(getSupportFragmentManager(),getSupportFragmentManager().findFragmentById(R.id.content));ActivityUtils.addFragmentToActivity(getSupportFragmentManager(),newAddDiaryFragment(),R.id.content);break;}returntrue;};}

MainActivity的layout

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns: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.AppBarLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"><androidx.appcompat.widget.Toolbarandroid: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><FrameLayoutandroid:id="@+id/content"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"/><com.google.android.material.bottomnavigation.BottomNavigationViewandroid: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>

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。

publicclassDiariesFragmentextendsFragment{privateDiariesController mController;@OverridepublicvoidonCreate(@NullableBundle savedInstanceState){super.onCreate(savedInstanceState);
        mController =newDiariesController(this);}@Nullable@OverridepublicViewonCreateView(@NonNullLayoutInflater inflater,@NullableViewGroup container,@NullableBundle savedInstanceState){View root = inflater.inflate(R.layout.fragment_diaries, container,false);
        mController.setDiariesList(root.findViewById(R.id.diaries_list));return root;}@OverridepublicvoidonResume(){super.onResume();
        mController.loadDiaries();}}

DiariesFragment的layout

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/diaries_list"android:layout_width="match_parent"android:layout_height="wrap_content"/></RelativeLayout>

publicclassAddDiaryFragmentextendsFragmentimplementsView.OnClickListener{privateAddDiaryController mController;privateView edit_layout;privateButton btn_confirm;privateEditText edit_title;privateEditText edit_desc;@OverridepublicvoidonCreate(@NullableBundle savedInstanceState){super.onCreate(savedInstanceState);
        mController =newAddDiaryController(this);}privatevoidinitView(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);}@OverridepublicvoidonCreateOptionsMenu(@NonNullMenu menu,@NonNullMenuInflater inflater){
        inflater.inflate(R.menu.menu_cancel, menu);}@OverridepublicbooleanonOptionsItemSelected(@NonNullMenuItem item){switch(item.getItemId()){caseR.id.menu_cancel:
                mController.closeWriteDiary(getActivity().getSupportFragmentManager(),this);
                mController.setNavigationVisibility();returntrue;}returnfalse;}@Nullable@OverridepublicViewonCreateView(@NonNullLayoutInflater inflater,@NullableViewGroup container,@NullableBundle savedInstanceState){View root = inflater.inflate(R.layout.fragment_add_diary, container,false);initView(root);return root;}@OverridepublicvoidonDestroy(){super.onDestroy();}@OverridepublicvoidonClick(View view){switch(view.getId()){caseR.id.add_diary_confirm:
                mController.addDiaryToRepository(edit_title.getText().toString().trim(), edit_desc.getText().toString().trim());
                mController.setNavigationVisibility();
                mController.closeWriteDiary(getActivity().getSupportFragmentManager(),this);break;caseR.id.edit_layout:
                mController.changeFocus(edit_desc);break;}}}

AddDiaryFragment的layout

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="10dp"android:layout_marginStart="10dp"android:layout_marginEnd="10dp"android:orientation="vertical"><EditTextandroid: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><LinearLayoutandroid: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"><LinearLayoutandroid: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"><EditTextandroid: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><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center"android:orientation="horizontal"><Buttonandroid:id="@+id/add_diary_confirm"android:text="@string/btn_ok"android:layout_width="wrap_content"android:layout_height="wrap_content"/></LinearLayout></LinearLayout>

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。

publicclassLoginDirectActivityextendsAppCompatActivityimplementsView.OnClickListener{privateEditText edit_input_text;privateButton btn_comeIn;privateTextView tv_setPsw;privatestaticfinalStringTAG="Login2Activity";@OverrideprotectedvoidonCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_direct_login);bindView();}privatevoidbindView(){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);}@OverridepublicvoidonClick(View v){switch(v.getId()){caseR.id.tv_setPsw:Intent setPsw_intent =newIntent(LoginDirectActivity.this,LoginActivity.class);startActivity(setPsw_intent);LoginDirectActivity.this.finish();//                overridePendingTransition(R.anim.out_to_left,R.anim.in_from_right);break;caseR.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 =newIntent(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.ConstraintLayoutxmlns: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"><Buttonandroid: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"/><LinearLayoutandroid: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"><ImageViewandroid:layout_width="32dp"android:layout_height="32dp"android:src="@mipmap/come_in_key"/><EditTextandroid: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.Guidelineandroid: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.Guidelineandroid:id="@+id/guideline5"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"app:layout_constraintGuide_percent="0.58"/><TextViewandroid: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.Guidelineandroid:id="@+id/guideline7"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"app:layout_constraintGuide_percent="0.4"/><TextViewandroid: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>

1. 使用SharedPrefrenced存储日记内容及标题。

publicfinalclassSharedPreferencesUtils{privatestaticfinalSimpleArrayMap<String,SharedPreferencesUtils> mCaches =newSimpleArrayMap<>();privateSharedPreferences mSharedPreferences;privateSharedPreferencesUtils(finalString spName,finalint mode){
        mSharedPreferences =YyApplication.get().getSharedPreferences(spName, mode);}publicstaticSharedPreferencesUtilsgetInstance(String spName){SharedPreferencesUtils utils = mCaches.get(spName);if(utils ==null){
            utils =newSharedPreferencesUtils(spName,Context.MODE_PRIVATE);}return utils;}publicvoidput(finalString key,finalString value){
        mSharedPreferences.edit().putString(key, value).apply();}publicStringget(finalString key){return mSharedPreferences.getString(key,"");}publicvoidremove(finalString 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。