# Android Studio＋Firebase
[TOC]

<style>
.flex-container{
display:flex;
justify-content:center;
}

</style>
# 壹、環境建置
## 一、Android Studio
### （一）下載JDK
#### 1. 至[Oracle官網](https://www.oracle.com/java/technologies/javase-downloads.html)，點選JDK Download。
<div class="flex-container">
<img src="https://i.imgur.com/WtAz8d7.png"
width="100%"></div>

#### 2. 根據作業系統，下載最新版本JDK。
<div class="flex-container">
<img src="https://i.imgur.com/vipYhtw.png"
width="100%"></div>

### （二）安裝Android Studio

#### 1. 至[Android Developer官網](https://developer.android.com/studio/index.html)，根據作業系統點選下載（圖以mac為例）
<div class="flex-container">
<img src="https://i.imgur.com/ykeBjKa.png"
width="90%"></div>

#### 2. 必須勾選已閱讀並同意授權條款，才能按下Download Android Studio鈕, 就會開始下載檔案。
<div class="flex-container">
<img src="https://i.imgur.com/yDNsHtV.png"
width="90%"></div>

:::info
因爲以前裝過android studio，中間步驟不加以敘述。
:::

---

## 二、連接Firebase
### （一）Android Studio 專案連接firebase設定
#### 1. 點選大頭照登入帳號。
<div class="flex-container">
<img src="https://i.imgur.com/XUcmcMX.png"
width="80%"></div>

#### 2. 點選『允許』，存取帳號。
<div class="flex-container">
<img src="https://i.imgur.com/j9TgJn2.png"
width="50%"></div>

#### 3. 顯示『Success!』，點選firebase。
<div class="flex-container">
<img src="https://i.imgur.com/RUCk5PG.png"
width="80%"></div>

### （二）Firebase專案建置
#### 1. 建立Firebase專案，至[Firebase的網站](https://firebase.google.com)登入，之後點擊右上方的按鈕前往「控制台」。
<div class="flex-container">
<img src="https://i.imgur.com/luddlJJ.png"
width="100%"></div>

#### 2. 在控制台中新增一個專案。（檔案名稱為範例）
<div class="flex-container">
<img src="https://i.imgur.com/7QZ6MSs.png"
width="80%"></div>

#### 3. 點選『繼續』
<div class="flex-container">
<img src="https://i.imgur.com/VyEKP3W.png"
width="80%"></div>

#### 4. 點選『建立專案』
<div class="flex-container">
<img src="https://i.imgur.com/7R55nSH.png"
width="80%"></div>

#### 5. 建立專案後進入底下的畫面，點選android的logo。
<div class="flex-container">
<img src="https://i.imgur.com/2j9d2uO.png"
width="100%"></div>

#### 6. 輸入套件名稱。
<div class="flex-container">
<img src="https://i.imgur.com/zQiTPK0.png"
width="90%"></div>

#### 7. 照著指示拖進Android studio專案裡，完成之後按『繼續』。
<div class="flex-container">
<img src="https://i.imgur.com/4n5xEMQ.png"
width="90%"></div>

#### 8. 照著指示，複製到build.gradle(Project:ElderlyApp)。
<div class="flex-container">
<img src="https://i.imgur.com/0DDVfol.png"
width="90%"></div>

#### 9. 照著指示，複製到build.gradle(Module:ElderlyApp)。
<div class="flex-container">
<img src="https://i.imgur.com/0hkXcwj.png"
width="90%"></div>

#### 10. 新增成功。
<div class="flex-container">
<img src="https://i.imgur.com/2yxX1Zm.png"
width="90%"></div>

# 貳、Authentication之使用
## 一、Authentication設定
#### 1. 打開tools裡的firebase
<div class="flex-container">
<img src="https://i.imgur.com/XMxfxmY.png"
width="60%"></div>

#### 2. 在authentication裡，選第一個。
<div class="flex-container">
<img src="https://i.imgur.com/9w6hmmw.png"
width="60%"></div>

#### 3. 選擇Connect to Firebase>。
<div class="flex-container">
<img src="https://i.imgur.com/4Jr5PnX.png"
width="60%"></div>

:::info
若遇到 **Connect to Firebase**
Could not parse the Android Application
Module's Gradle config. ResoIve gradle build issues and/or resync.

將build.gradle(Project:)裡的 allprojects下的jcenter()給註解。
:::

#### 4. 點選Build。
<div class="flex-container">
<img src="https://i.imgur.com/IEeBVqv.png"
width="60%"></div>

#### 5. 導向firebase，選擇專案。
<div class="flex-container">
<img src="https://i.imgur.com/Kbhh7Hd.png"
width="80%"></div>

#### 6. 點選『連結』。
<div class="flex-container">
<img src="https://i.imgur.com/nfOXhLl.png"
width="80%"></div>

#### 7. 回到android studio 執行SDK。
<div class="flex-container">
<img src="https://i.imgur.com/ZuZTz9F.png"
width="60%"></div>

#### 8. SDK建置成功。
<div class="flex-container">
<img src="https://i.imgur.com/rUP2MKu.png"
width="70%"></div>

## 二、Authentication 身份驗證

**>>> 設定e-mail作為驗證方式 <<<**

#### 1. 點選『電子郵件』。
<div class="flex-container">
<img src="https://i.imgur.com/qdnZkld.png"
width="90%"></div>

#### 2. 選擇『啟用』並儲存。
<div class="flex-container">
<img src="https://i.imgur.com/tvOAht3.png"
width="100%"></div>

## 三、Authentication 程式碼
:::info
<div class="flex-container">
<img src="https://i.imgur.com/oG9bqBh.png"
width="100%"></div>
gradle 的地方隨自己的需求新增firebase功能
:::
### (一)註冊功能 (以家屬註冊為例)
<div class="flex-container">
<img src="https://i.imgur.com/vfgQ66j.png"
width="30%"></div>

#### 1. SignUp1Activity.java

package com.example.elderlyapp;
import android.content.Intent;
import android.os.Bundle;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.FirebaseDatabase;


public class SignUp1Activity extends AppCompatActivity implements View.OnClickListener {
    private EditText editTextEmail, editTextPassword, editTextFullName, editTextPhone, editTextElderlyId;
    private Button signup;
    private FirebaseAuth mAuth;
    private FirebaseUser user;
    private FirebaseAuth.AuthStateListener mAuthListener;
    private ProgressBar progressBar;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign_up1);
        mAuth = FirebaseAuth.getInstance();
        signup = (Button) findViewById(R.id.sign_up);
        signup.setOnClickListener(this);
        editTextEmail = (EditText) findViewById(R.id.email);
        editTextPassword = (EditText) findViewById(R.id.password);
        editTextFullName = (EditText) findViewById(R.id.fullName);
        editTextPhone = (EditText) findViewById(R.id.phone);
        editTextElderlyId = (EditText) findViewById(R.id.elderlyid);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);
    }

    @Override
    public void onClick(View v) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        switch (v.getId()) {
            case R.id.sign_up:
                signup();
                break;
        }
    }

    private void signup() {
        final String email = editTextEmail.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();
        final String fullName = editTextFullName.getText().toString().trim();
        final String phone = editTextPhone.getText().toString().trim();
        final String elderlyid = editTextElderlyId.getText().toString().trim();

        //註冊條件限制
        if (email.isEmpty()) {
            editTextEmail.setError("Email is required!");
            editTextEmail.requestFocus();
            return;
        }
        if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            editTextPassword.setError("Please enter a valid email!");
            editTextPassword.requestFocus();
            return;
        }
        if (password.isEmpty()) {
            editTextPassword.setError("Password is required!");
            editTextPassword.requestFocus();
            return;
        }
        if (password.length() < 6) {
            editTextPassword.setError("Min Password length is 6 characters!");
            editTextPassword.requestFocus();
            return;
        }
        if (fullName.isEmpty()) {
            editTextFullName.setError("Please enter your name!");
            editTextFullName.requestFocus();
            return;
        }
        if (phone.isEmpty()) {
            editTextPhone.setError("Please enter your phone number!");
            editTextPhone.requestFocus();
            return;
        }
        if (phone.length() != 10) {
            editTextPhone.setError("Please enter a valid phone number!");
            editTextPhone.requestFocus();
            return;
        }
        if (elderlyid.isEmpty()) {
            editTextElderlyId.setError("Please enter Elderly ID!");
            editTextElderlyId.requestFocus();
            return;
        }

        progressBar.setVisibility(View.VISIBLE);
        
        mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {
                    User user = new User(email, fullName, phone, elderlyid);
                    FirebaseDatabase.getInstance().getReference("家屬")
                            .child(FirebaseAuth.getInstance().getCurrentUser().getUid())
                            .setValue(user).addOnCompleteListener(new OnCompleteListener<Void>() {
                        @Override
                        public void onComplete(@NonNull Task<Void> task) {
                            if (task.isSuccessful()) {
                                Toast.makeText(SignUp1Activity.this, R.string.register_success, Toast.LENGTH_SHORT).show();
                                progressBar.setVisibility(View.GONE);
                                Intent intent = new Intent();
                                intent.setClass(SignUp1Activity.this, Login1Activity.class);
                                startActivity(intent);
                                finish();
                            } else {
                                Toast.makeText(SignUp1Activity.this, "Failed to register! Try again!", Toast.LENGTH_SHORT).show();
                                progressBar.setVisibility(View.GONE);
                            }
                        }
                    });
                } else {
                    Toast.makeText(SignUp1Activity.this, "Failed to register! Try again!", Toast.LENGTH_SHORT).show();
                    progressBar.setVisibility(View.GONE);
                }
            }
        });
    }
}

#### 2. User.java
##### &nbsp;&nbsp;&nbsp;&nbsp;★ 建立Firebase資料庫內的項目(例:id、name...等)

package com.example.elderlyapp;

public class User {
    public String email,fullname,phone,elderlyid;
    public User(){

    }
    public User(String email,String fullname,String phone,String elderlyid){
        this.email = email;
        this.fullname = fullname;
        this.phone = phone;
        this.elderlyid = elderlyid;
    }
}

### (二)登入功能

<div class="flex-container">
<img src="https://i.imgur.com/5y9sHwx.png"
width="30%"></div>

#### 1. Login1Activity.java

package com.example.elderlyapp;
import android.content.Intent;
import android.os.Bundle;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

import static maes.tech.intentanim.CustomIntent.customType;

//import android.support.annotation.NonNull;
//import android.support.design.widget.TextInputLayout;
//import android.support.v7.app.AppCompatActivity;

public class Login1Activity extends AppCompatActivity implements View.OnClickListener {
    private TextView forgotPassword;
    private EditText editTextEmail,editTextPassword;
    private Button signIn;
    private Button signUp;
    private FirebaseAuth mAuth;
    private FirebaseUser user;
    private FirebaseAuth.AuthStateListener mAuthListener;

    private ProgressBar progressBar;

    private CheckBox showpassword;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login1);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        signIn = (Button) findViewById(R.id.signIn);
        signIn.setOnClickListener(this);
        signUp = (Button) findViewById(R.id.signUp);
        editTextEmail = (EditText) findViewById(R.id.email);
        editTextPassword = (EditText) findViewById(R.id.password);

        progressBar = (ProgressBar) findViewById(R.id.progressBar);

        mAuth = FirebaseAuth.getInstance();

        showpassword = (CheckBox) findViewById(R.id.showpassword);

        forgotPassword = (TextView) findViewById(R.id.forgotPassword);
        forgotPassword.setOnClickListener(this);

        showpassword.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean b) {
                if(b) {
                    editTextPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
                }
                else{
                    editTextPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());
                }
            }
        });
         signUp.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent();
                    intent.setClass(Login1Activity.this, SignUp1Activity.class); //按signup就要去login畫面
                    startActivity(intent);
                    //finish();
                }
            });
    }
    @Override
    public void onClick(View v){
       switch (v.getId()){
            case R.id.signIn:
                userLogin();
                customType(this,"left-to-right");
                break;
            case R.id.forgotPassword:
                startActivity(new Intent(this, ForgotPassword.class));
                customType(this,"fadein-to-fadeout");
                break;
           case R.id.signUp:
               startActivity(new Intent(this, SignUp1Activity.class));
               break;
        }
    }

    private void userLogin(){
        final String email = editTextEmail.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();

        if(email.isEmpty()){
           editTextEmail.setError("Email is required!");
           editTextEmail.requestFocus();
           return;
           }
        if(!Patterns.EMAIL_ADDRESS.matcher(email).matches()){
           editTextPassword.setError("Please enter a valid email!");
           editTextPassword.requestFocus();
           return;
           }
        if(password.isEmpty()){
            editTextPassword.setError("Password is required!");
            editTextPassword.requestFocus();
            return;
        }
        if(password.length()<6){
            editTextPassword.setError("Min Password length is 6 characters!");
            editTextPassword.requestFocus();
            return;
        }

        progressBar.setVisibility(View.VISIBLE);

        mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
        @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                  if (task.isSuccessful()) {
                        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
                        if(user.isEmailVerified()){
                            startActivity(new Intent(Login1Activity.this, MainActivity.class));
                            }else{
                               user.sendEmailVerification();
                               Toast.makeText(Login1Activity.this, "Check your email to verity your account!", Toast.LENGTH_SHORT).show();
                               progressBar.setVisibility(View.GONE);
                                    }
                                } else {
                                    Toast.makeText(Login1Activity.this,"Failed to login! Please check your credentials", Toast.LENGTH_SHORT).show();
                                    progressBar.setVisibility(View.GONE);
                                }
                            }
                        });
            }
        }

### (三)忘記密碼功能

<div class="flex-container">
<img src="https://i.imgur.com/1YVmEgT.png"
width="30%"></div>

#### 1. ForgotPassword.java

import android.content.Intent;
import android.os.Bundle;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;

public class ForgotPassword extends AppCompatActivity {
    private TextView banner,bannerDescription;
    private EditText emailEditText;
    private Button resetPasswordButton;
    private ProgressBar progressBar;

    FirebaseAuth auth;

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

        emailEditText = (EditText) findViewById(R.id.email);
        resetPasswordButton = (Button) findViewById(R.id.resetPassword);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);

        auth = FirebaseAuth.getInstance();

        resetPasswordButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getSupportActionBar().setDisplayHomeAsUpEnabled(true);
                resetPassword();
            }
        });
    }
    private void resetPassword(){
        String email = emailEditText.getText().toString().trim();
        if(email.isEmpty()){
            emailEditText.setError("Email is required!");
            emailEditText.requestFocus();
            return;
        }
        if(!Patterns.EMAIL_ADDRESS.matcher(email).matches()){
            emailEditText.setError("Please provide valid email!");
            emailEditText.requestFocus();
            return;
        }
        progressBar.setVisibility(View.VISIBLE);
        auth.sendPasswordResetEmail(email).addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if(task.isSuccessful()) {
                    Toast.makeText(ForgotPassword.this, "Check your Email to reset your new password!", Toast.LENGTH_LONG).show();
                    progressBar.setVisibility(View.GONE);
                    Intent intent = new Intent();
                    intent.setClass(ForgotPassword.this, HomeActivity.class);
                    startActivity(intent);
                    finish();
                }else{
                    Toast.makeText(ForgotPassword.this, "Try again! Something wrong happend!", Toast.LENGTH_LONG).show();
                    progressBar.setVisibility(View.GONE);

                }
            }
        });
    }
}

# 參、Realtime Database之使用
## ㄧ、專案網頁設定
#### 1. 點選建立資料庫。
<div class="flex-container">
<img src="https://i.imgur.com/M3NoGAM.png"
width="100%"></div>

#### 2. 位置在此選擇美國後，點選下一步。
<div class="flex-container">
<img src="https://i.imgur.com/ef71vlb.png"
width="100%"></div>

#### 3. 選擇測試模式後，點選啟用。
<div class="flex-container">
<img src="https://i.imgur.com/vFVHrI0.png"
width="100%"></div>

## 二、專案使用之程式碼
### (一)ElderlyActivity.java

:::info
「健康紀錄表/長者清單/排班表」都是同類型的清單功能(新增/刪除/修改)，其做法相似，因此以「長者清單功能」做示範。
:::
<div class="flex-container">
<img src="https://i.imgur.com/AF6uDTz.jpg"
width="30%"></div>

#### 1. 長者資料表[搜尋功能]

package com.example.elderlyapp;

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.SearchView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.FirebaseDatabase;

public class ElderlyActivity extends AppCompatActivity {
    RecyclerView recview;
    myadapter adapter;
    ImageView fb;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.elderly_main);
        setTitle("請輸入長者名字..");

        recview=(RecyclerView)findViewById(R.id.recview);
        recview.setLayoutManager(new LinearLayoutManager(this));

        //<model>清單連動firebase
        FirebaseRecyclerOptions<model> options =
                new FirebaseRecyclerOptions.Builder<model>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("年長者"),model.class)
                        .build();

        adapter=new myadapter(options);
        recview.setAdapter(adapter);

        //[新增功能]按鈕
        fb=(ImageView) findViewById(R.id.fadd);
        fb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) { //導至下一個頁面[AddData.class]
                startActivity(new Intent(getApplicationContext(), AddData.class));
            }
        });

    }

    @Override
    protected void onStart(){
        super.onStart();
        adapter.startListening();
    }

    @Override
    protected void onStop(){
        super.onStop();
        adapter.stopListening();
    }
    
   //[搜尋功能]
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.searchmenu,menu);
        MenuItem item=menu.findItem(R.id.search);
        SearchView searchView=(SearchView)item.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            
            @Override
            public boolean onQueryTextSubmit(String E) {
                processsearch(E);
                return false;
            }

            @Override
            public boolean onQueryTextChange(String E) {
                processsearch(E);
                return false;
            }
        });

        return super.onCreateOptionsMenu(menu);
    }

    //目標:透過name來搜尋
    //連動firebase->找[年長者]->name
    private void processsearch(String E)
    {
        FirebaseRecyclerOptions<model> options =
                new FirebaseRecyclerOptions.Builder<model>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("年長者").orderByChild("name").startAt(E).endAt(E+"\uf8ff"),model.class)
                        .build();

        adapter=new myadapter(options);
        adapter.startListening();
        recview.setAdapter(adapter);
    }
}

#### 2. 搜尋功能是去firebase裡抓資料

##### ★ 該範例目標是想搜尋年長者底下的name

<div class="flex-container">
<img src="https://i.imgur.com/ccSmhVS.png"
width="100%"></div>

##### ★ 搜尋結果(以搜尋Jenny為例)
<div class="flex-container">
<img src="https://i.imgur.com/GZOBeN0.png"
width="30%"></div>

### (二)AddData.java
#### 1. 資料表[新增資料]的功能

視專案設計需求，自行加入至專案裡。

<div class="flex-container">
<img src="https://i.imgur.com/9ps0Xxw.png"
width="30%">
&nbsp;
<img src="https://i.imgur.com/HPSS1Nq.png"
width="30%"></div>

&nbsp;

package com.example.elderlyapp;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.database.FirebaseDatabase;

import java.util.HashMap;
import java.util.Map;

public class AddData extends AppCompatActivity
{
    EditText id,name,birth,purl,manager1,manager2,manager3,identify;
    Button submit,back;

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

        id=(EditText)findViewById(R.id.add_id);
        identify=(EditText)findViewById(R.id.add_identify);
        name=(EditText)findViewById(R.id.add_name);
        birth=(EditText)findViewById(R.id.add_birth);
        purl=(EditText)findViewById(R.id.add_purl);
        manager1=(EditText)findViewById(R.id.add_manager1);
        manager2=(EditText)findViewById(R.id.add_manager2);
        manager3=(EditText)findViewById(R.id.add_manager3);

        back=(Button)findViewById(R.id.add_back);
        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(getApplicationContext(),ElderlyActivity.class));
                finish();
            }
        });

        submit=(Button)findViewById(R.id.add_submit);
        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                processinsert();
            }
        });
    }

    private void processinsert()
    {
        Map<String,Object> map=new HashMap<>();
        map.put("id",id.getText().toString());
        map.put("identify",identify.getText().toString());
        map.put("name",name.getText().toString());
        map.put("birth",birth.getText().toString());
        map.put("purl",purl.getText().toString());
        map.put("manager1",manager1.getText().toString());
        map.put("manager2",manager2.getText().toString());
        map.put("manager3",manager3.getText().toString());
        FirebaseDatabase.getInstance().getReference().child("年長者").push()
                .setValue(map)
                .addOnSuccessListener(new OnSuccessListener<Void>() {
                    @Override
                    public void onSuccess(Void aVoid) {
                        id.setText("");
                        identify.setText("");
                        name.setText("");
                        birth.setText("");
                        purl.setText("");
                        manager1.setText("");
                        manager2.setText("");
                        manager3.setText("");
                        Toast.makeText(getApplicationContext(),"新增成功",Toast.LENGTH_LONG).show();
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e)
                    {
                        Toast.makeText(getApplicationContext(),"新增失敗，請再試一次",Toast.LENGTH_LONG).show();
                    }
                });

    }
}

&nbsp;
### (三)model.java

#### 1. 建立Firebase資料庫內的項目 (例 : id、name...等)

package com.example.elderlyapp;

public class model {
    String id,name,birth,purl,manager1,manager2;
    model()
    {

    }

    public model(String id, String name, String birth, String purl, String manager1, String manager2) {
        this.id = id;
        this.name = name;
        this.birth = birth;
        this.purl = purl;
        this.manager1 = manager1;
        this.manager2 = manager2;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getBirth() {
        return birth;
    }

    public void setBirth(String birth) {
        this.birth = birth;
    }

    public String getPurl() {
        return purl;
    }

    public void setPurl(String purl) {
        this.purl = purl;
    }

    public String getManager1() {
        return manager1;
    }

    public void setManager1(String manager1) {
        this.manager1 = manager1;
    }

    public String getManager2() {
        return manager2;
    }

    public void setManager2(String manager2) {
        this.manager2 = manager2;
    }
}

#### 2. 呈現結果
<div class="flex-container">
<img src="https://i.imgur.com/w6HtzLC.png"
width="100%"></div>

&nbsp;

### (四)myadapter.java

#### 1. 資料表[編輯資料/刪除資料]的功能

<div class="flex-container">
<img src="https://i.imgur.com/yjI0cP2.png"
width="30%">
&nbsp;
<img src="https://i.imgur.com/7OYsXTU.png"
width="30%"></div>

&nbsp;

package com.example.elderlyapp;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.bumptech.glide.Glide;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.database.FirebaseDatabase;
import com.orhanobut.dialogplus.DialogPlus;
import com.orhanobut.dialogplus.ViewHolder;

import java.util.HashMap;
import java.util.Map;

import de.hdodenhof.circleimageview.CircleImageView;

//[長者清單的按鈕功能(編輯、刪除)]
public class myadapter extends FirebaseRecyclerAdapter<model,myadapter.myviewholder>
{
    public myadapter(@NonNull FirebaseRecyclerOptions<model> options) {
        super(options);
    }

    @Override
    protected void onBindViewHolder(@NonNull final myviewholder holder, final int position, @NonNull final model model)
    {
      holder.id.setText(model.getId());
      holder.identify.setText(model.getIdentify());
      holder.name.setText(model.getName());
      holder.birth.setText(model.getBirth());
      holder.manager1.setText(model.getManager1());
      holder.manager2.setText(model.getManager2());
      holder.manager3.setText(model.getManager3());
      Glide.with(holder.img.getContext()).load(model.getPurl()).into(holder.img);

                     //[功能]:編輯長者資料
                     holder.edit.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            final DialogPlus dialogPlus=DialogPlus.newDialog(holder.img.getContext())
                                 .setContentHolder(new ViewHolder(R.layout.dialogcontent))
                                 .setExpanded(true,1100)
                                 .create();
                            View myview=dialogPlus.getHolderView();
                            final EditText purl=myview.findViewById(R.id.uimgurl);
                            final EditText id=myview.findViewById(R.id.uid);
                            final EditText identify=myview.findViewById(R.id.uidentify);
                            final EditText name=myview.findViewById(R.id.uname);
                            final EditText birth=myview.findViewById(R.id.ubirth);
                            final EditText manager1=myview.findViewById(R.id.umanager1);
                            final EditText manager2=myview.findViewById(R.id.umanager2);
                            final EditText manager3=myview.findViewById(R.id.umanager3);
                            Button submit=myview.findViewById(R.id.usubmit);

                            purl.setText(model.getPurl());
                            id.setText(model.getId());
                            identify.setText(model.getIdentify());
                            name.setText(model.getName());
                            birth.setText(model.getBirth());
                            manager1.setText(model.getManager1());
                            manager2.setText(model.getManager2());
                            manager3.setText(model.getManager3());

                            dialogPlus.show();

                               ////長者資料編輯完送出
                                submit.setOnClickListener(new View.OnClickListener() {
                                    @Override
                                    public void onClick(View view) {
                                        Map<String,Object> map=new HashMap<>();
                                        map.put("purl",purl.getText().toString());
                                        map.put("id",id.getText().toString());
                                        map.put("identify",identify.getText().toString());
                                        map.put("birth",birth.getText().toString());
                                        map.put("name",name.getText().toString());
                                        map.put("manager1",manager1.getText().toString());
                                        map.put("manager2",manager2.getText().toString());
                                        map.put("manager3",manager3.getText().toString());

                                        FirebaseDatabase.getInstance().getReference().child("年長者")
                                                .child(getRef(position).getKey()).updateChildren(map)
                                                .addOnSuccessListener(new OnSuccessListener<Void>() {
                                                    @Override
                                                    public void onSuccess(Void aVoid) {
                                                        dialogPlus.dismiss();
                                                    }
                                                })
                                                .addOnFailureListener(new OnFailureListener() {
                                                    @Override
                                                    public void onFailure(@NonNull Exception e) {
                                                        dialogPlus.dismiss();
                                                    }
                                                });
                                    }
                                });


                        }
                     });

                    //[功能]:刪除長者資料
                    holder.delete.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            AlertDialog.Builder builder = new AlertDialog.Builder(holder.img.getContext());
                            builder.setTitle("刪除資料");
                            builder.setMessage("確定刪除?");

                            builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialogInterface, int i) {
                                    FirebaseDatabase.getInstance().getReference().child("年長者")
                                            .child(getRef(position).getKey()).removeValue();
                                }
                            });

                            builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialogInterface, int i) {

                                }
                            });

                            builder.show();
                        }
                    });

    } // End of OnBindViewMethod

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

    class myviewholder extends RecyclerView.ViewHolder
    {
       CircleImageView img;
       TextView id,name,birth,manager1,manager2,manager3,identify;
       ImageView edit,delete;
       public myviewholder(@NonNull View itemView)
       {
           super(itemView);
           img=(CircleImageView)itemView.findViewById(R.id.img1);
           id=(TextView)itemView.findViewById(R.id.idtext);
           identify=(TextView)itemView.findViewById(R.id.identifytext);
           name=(TextView)itemView.findViewById(R.id.nametext);
           birth=(TextView)itemView.findViewById(R.id.birthtext);
           manager1=(TextView)itemView.findViewById(R.id.manager1text);
           manager2=(TextView)itemView.findViewById(R.id.manager2text);
           manager3=(TextView)itemView.findViewById(R.id.manager3text);
           edit=(ImageView)itemView.findViewById(R.id.editicon);
           delete=(ImageView)itemView.findViewById(R.id.deleteicon);
       }
    }
}

&nbsp;
### (五) 客服功能(一鍵撥電話/傳信箱)
<div class="flex-container">
<img src="https://i.imgur.com/YXjfe4G.png"
width="30%">
&nbsp;</div>

### 1. ContactActivity.java
#### &nbsp;&nbsp;&nbsp;&nbsp;★ 功能 : 點擊圖示直接撥電話/傳mail

package com.example.elderlyapp;


import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class ContactActivity extends AppCompatActivity {

    //private static final int REQUEST_CALL = 1;
    ImageView emailMe1;
    ImageView emailMe2;
    ImageView emailMe3;
    ImageView emailMe4;
    ImageView emailMe5;
    ImageView emailMe6;

    ImageView callMe1;
    ImageView callMe2;
    ImageView callMe3;
    ImageView callMe4;
    ImageView callMe5;
    ImageView callMe6;

    TextView callText1;
    TextView callText2;
    TextView callText3;
    TextView callText4;
    TextView callText5;
    TextView callText6;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact);
        emailMe1 = (ImageView) findViewById(R.id.emailMe1);
        emailMe2 = (ImageView) findViewById(R.id.emailMe2);
        emailMe3 = (ImageView) findViewById(R.id.emailMe3);
        emailMe4 = (ImageView) findViewById(R.id.emailMe4);
        emailMe5 = (ImageView) findViewById(R.id.emailMe5);
        emailMe6 = (ImageView) findViewById(R.id.emailMe6);

        callMe1 = (ImageView) findViewById(R.id.callMe1);
        callMe2 = (ImageView) findViewById(R.id.callMe2);
        callMe3 = (ImageView) findViewById(R.id.callMe3);
        callMe4 = (ImageView) findViewById(R.id.callMe4);
        callMe5 = (ImageView) findViewById(R.id.callMe5);
        callMe6 = (ImageView) findViewById(R.id.callMe6);

        callText1 = (TextView) findViewById(R.id.callText1);
        callText2 = (TextView) findViewById(R.id.callText2);
        callText3 = (TextView) findViewById(R.id.callText3);
        callText4 = (TextView) findViewById(R.id.callText4);
        callText5 = (TextView) findViewById(R.id.callText5);
        callText6 = (TextView) findViewById(R.id.callText6);

        emailMe1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        emailMe2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        emailMe3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        emailMe4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        emailMe5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        emailMe6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SENDTO);
                intent.setData(Uri.parse("mailto:[e-mail]"));
                startActivity(intent);
            }
        });

        callMe1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });

        callMe2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });

        callMe3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });

        callMe4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });

        callMe5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });

        callMe6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("tel:[phone]"));
                startActivity(intent);
            }
        });
    }
}

&nbsp;
### (六) Android接收yolov5即時動作偵測
<div class="flex-container">
<img src="https://i.imgur.com/Esx6Wz7.png"
width="30%">
&nbsp;</div>

### 1. CameraActivity2.java
#### &nbsp;&nbsp;&nbsp;&nbsp;★ [搜尋功能] : movement底下的id

package com.example.elderlyapp;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.SearchView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.FirebaseDatabase;
//長照員
public class CameraActivity2 extends AppCompatActivity {
    RecyclerView recview;
    myadapter3 adapter;
    //VideoView videoView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.camera_main2);
        setTitle("請輸入長者id..");

        recview=(RecyclerView)findViewById(R.id.recview);
        recview.setLayoutManager(new LinearLayoutManager(this));

        FirebaseRecyclerOptions<Cameramodel2> options =
                new FirebaseRecyclerOptions.Builder<Cameramodel2>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("movement"), Cameramodel2.class)
                        .build();

        adapter=new myadapter3(options);
        recview.setAdapter(adapter);

    }

    @Override
    protected void onStart(){
        super.onStart();
        adapter.startListening();
    }

    @Override
    protected void onStop(){
        super.onStop();
        adapter.stopListening();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.searchmenu,menu);

        MenuItem item=menu.findItem(R.id.search);

        SearchView searchView=(SearchView)item.getActionView();

        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String E) {
                processsearch(E);
                return false;
            }

            @Override
            public boolean onQueryTextChange(String E) {
                processsearch(E);
                return false;
            }
        });

        return super.onCreateOptionsMenu(menu);
    }

    private void processsearch(String E)
    {
        FirebaseRecyclerOptions<Cameramodel2> options =
                new FirebaseRecyclerOptions.Builder<Cameramodel2>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("movement").orderByChild("ID").startAt(E).endAt(E+"\uf8ff"), Cameramodel2.class)
                        .build();

        adapter=new myadapter3(options);
        adapter.startListening();
        recview.setAdapter(adapter);
    }
}

#### ★ ( 目標 : 搜尋movement底下的 id )
<div class="flex-container">
<img src="https://i.imgur.com/9uAVbEo.png"
width="100%">
&nbsp;</div>

### 2. myadapter3.java
#### &nbsp;&nbsp;&nbsp;&nbsp;★ RecyclerView 清單

package com.example.elderlyapp;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;


public class myadapter3 extends FirebaseRecyclerAdapter<Cameramodel2,myadapter3.myviewholder>
{
    public myadapter3(@NonNull FirebaseRecyclerOptions<Cameramodel2> options) {
        super(options);
    }

    @Override
    protected void onBindViewHolder(@NonNull final myviewholder holder, final int position, @NonNull final Cameramodel2 model) {
        holder.ID.setText(model.getID());
        holder.movement.setText(model.getMovement());
        holder.name.setText(model.getName());
        holder.times.setText(model.getTimes());
    }

    @NonNull
    @Override
    public myviewholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
    {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.singlerow5,parent,false);
        return new myviewholder(view);
    }

    class myviewholder extends RecyclerView.ViewHolder
    {
        TextView ID,name,movement,times;
        public myviewholder(@NonNull View itemView)
        {
            super(itemView);
            ID=(TextView)itemView.findViewById(R.id.idtext);
            movement=(TextView)itemView.findViewById(R.id.movementtext);
            name=(TextView)itemView.findViewById(R.id.nametext);
            times=(TextView)itemView.findViewById(R.id.timestext);

        }
    }
}

### 3. Cameramodel.java
#### &nbsp;&nbsp;&nbsp;&nbsp;★ 建立Firebase資料庫內的項目 (id、name、movement、times)

package com.example.elderlyapp;

public class Cameramodel{
    String ID,name,movement,times;
    Cameramodel()
    {

    }

    public Cameramodel(String ID, String name, String movement, String times) {
        this.ID = ID;
        this.name = name;
        this.movement = movement;
        this.times = times;
    }

    public String getID() {
        return ID;
    }

    public void setID(String ID) {
        this.ID = ID;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMovement() {
        return movement;
    }
    
    public void setMovement(String movement) {
        this.movement = movement;
    }

    public String getTimes() {
        return times;
    }

    public void setTimes(String times) {
        this.times = times;
    }

}

# 肆、Google 地圖應用
## 一、[啟用 API 或 SDK](https://developers.google.com/maps/gmp-get-started?hl=zh_tw)

# 參考資料
安裝Android Studio步驟：
https://ithelp.ithome.com.tw/articles/10200176

註冊/登入:
https://www.youtube.com/watch?v=Z-RE1QuUWPg

清單新增/刪除/修改:
https://www.youtube.com/watch?v=Do4tOzFk3jc
https://www.youtube.com/watch?v=8KGN1272iuk