直播平臺軟體開發，一個簡單的Android登入實現demo

直播平臺軟體開發，一個簡單的Android登入實現demo

一、登入活動

package com.example.login;
 
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
 
import androidx.appcompat.app.AppCompatActivity;
 
public class LoginActivity extends AppCompatActivity implements View.OnClickListener {
    private EditText loginAcount, loginKey;
    private Button loginBtn, lRegisterBtn;
    private Intent jump_to_page1, jump_to_register;
    private MySQLiteOpenHelper db;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        //初始化UI介面
        initView();
        //申明自己寫的MySQLiteOpenHelper物件，主要用來建立資料表,然後再進行資料表的增、刪、改、查操作
        db = new MySQLiteOpenHelper(this);
    }
 
    private void initView() {
        loginAcount=(EditText)findViewById(R.id.loginAccount);
        loginKey=(EditText)findViewById(R.id.loginKey);
        loginBtn=(Button)findViewById(R.id.loginBtn);
        lRegisterBtn=(Button)findViewById(R.id.lRegiterBtn);
 
        //設定監聽器
        loginBtn.setOnClickListener(this);
        lRegisterBtn.setOnClickListener(this);
 
        //修改標題欄
        getSupportActionBar().setTitle("登入頁面");
 
    }
 
    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.loginBtn:
                //獲取輸入的賬號和密碼
                String account = loginAcount.getText().toString();
                String key1 = loginKey.getText().toString();
 
                if (!TextUtils.isEmpty(account) && !TextUtils.isEmpty(key1)) {   //判斷賬號、密碼是否都不為空
                    if (db.queryCountByAccount(account) != 0) { //賬號是否存在
                        if (TextUtils.equals(key1, db.queryKeyByAcount(account))) { //輸入的密碼與資料庫中賬號對應的密碼是否相等
                            //提示登入成功
                            Toast.makeText(this, "登入成功", Toast.LENGTH_LONG).show();
                            //跳轉到登入後的頁面
                            jump_to_page1 = new Intent(LoginActivity.this, Page1Activity.class);
                            startActivity(jump_to_page1);
                            finish();//銷燬此Activity
                        } else {
                            //提示輸入密碼或賬號不正確
                            Toast.makeText(this, "賬號或密碼不正確", Toast.LENGTH_LONG).show();
                        }
                    } else {
                        //提示輸入賬號不存在
                        Toast.makeText(this, "賬號不存在", Toast.LENGTH_LONG).show();
                    }
                } else {
                    //提示輸入密碼或賬號不能為空
                    Toast.makeText(this, "賬號或密碼不能為空", Toast.LENGTH_LONG).show();
                }
                break;
            case R.id.lRegiterBtn:
                //跳轉到註冊頁面
                jump_to_register = new Intent(LoginActivity.this, RegisterActivity.class);
                startActivity(jump_to_register);
                finish();//銷燬此Activity
                break;
            default:
                break;
        }
    }
}

二、註冊頁面活動

package com.example.login;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
 
public class RegisterActivity extends AppCompatActivity implements View.OnClickListener {
    private EditText regiterAcount,registerKey1,registerMail,registerKey2;
    private Button registerBackBtn,registerBtn;
    private Intent jump_to_page1,jump_to_login;
    private MySQLiteOpenHelper db;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        //初始化註冊頁面
        initView();
        //申明自己寫的MySQLiteOpenHelper物件，主要用來建立資料表,然後再進行資料表的增、刪、改、查操作
        db=new MySQLiteOpenHelper(this);
    }
 
    private void initView(){
        regiterAcount=(EditText)findViewById(R.id.regiterAccount);
        registerKey1=(EditText)findViewById(R.id.registerKey);
        registerKey2=(EditText)findViewById(R.id.registerKey2);
        registerMail=(EditText)findViewById(R.id.registerMail);
        registerBackBtn=(Button)findViewById(R.id.registerBackBtn);
        registerBtn=(Button)findViewById(R.id.regiterBtn);
 
        //設定監聽器
        registerBackBtn.setOnClickListener(this);
        registerBtn.setOnClickListener(this);
 
        //修改標題欄
        getSupportActionBar().setTitle("註冊頁面");
    }
 
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.registerBackBtn:
                //返回到登入頁面
                jump_to_login=new Intent(this,LoginActivity.class);
                startActivity(jump_to_login);
                finish();//銷燬此Activity
                break;
            case R.id.regiterBtn:
                //獲取使用者輸入的賬號、密碼、郵箱
                String account=regiterAcount.getText().toString();
                String key1=registerKey1.getText().toString();
                String key2=registerKey2.getText().toString();
                String mail=registerMail.getText().toString();
 
                if(!TextUtils.isEmpty(account)&& !TextUtils.isEmpty(key1) && !TextUtils.isEmpty(key2)){ //郵箱為空也可進行註冊
                    if(db.queryCountByAccount(account)==0){ //輸入的賬號在資料庫中不存在
                        if(TextUtils.equals(key1,key2)){ //兩次輸入密碼一致
                            //向資料庫中插入資料
                            db.insert(account,key1,mail);
                            //提示註冊成功
                            Toast.makeText(this,"註冊成功",Toast.LENGTH_LONG).show();
                            //跳轉到登入後頁面
                            jump_to_page1=new Intent(this,Page1Activity.class);
                            startActivity(jump_to_page1);
                            finish();//銷燬此Activity
                        }else{
                            //提示兩次輸入密碼不一致
                            Toast.makeText(this,"兩次輸入密碼不一致",Toast.LENGTH_LONG).show();
                        }
                    }else{
                        //提示賬號已存在
                        Toast.makeText(this,"賬號已存在",Toast.LENGTH_LONG).show();
                    }
                }else{
                    //提示輸入的賬號、密碼不能為空
                    Toast.makeText(this,"輸入的賬號密碼不能為空",Toast.LENGTH_LONG).show();
                }
                break;
            default:
                break;
 
        }
    }
}

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