Java Android-硬代码登录不工作_Java_Android_Login_Hardcode_Hardcoded

Java Android-硬代码登录不工作

java android login

Java Android-硬代码登录不工作,java,android,login,hardcode,hardcoded,Java,Android,Login,Hardcode,Hardcoded,目标通过AdminLogin.xml登录到my Admin.xml 课程流 import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.Toolbar; import android.view.View; import androi

目标

通过AdminLogin.xml登录到my Admin.xml

课程流

    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.support.v7.widget.Toolbar;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;

    public class AdminLoginActivity extends AppCompatActivity {

    private Toolbar jAdminToolbar;

    private EditText jAdminID;
    private EditText jAdminPassword;

    private Button jAdminLoginBtn;

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

        jAdminToolbar = (Toolbar) findViewById(R.id.adminLoginToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Admin Login");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        jAdminID = (EditText) findViewById(R.id.adminLoginName);
        jAdminPassword = (EditText) findViewById(R.id.adminLoginPassword);
        jAdminLoginBtn = (Button) findViewById(R.id.adminLoginBtn);

        jAdminLoginBtn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                String adminLoginID = jAdminID.getText().toString();
                String adminLoginPassword = jAdminPassword.getText().toString();

                if(adminLoginID.equals("admin")&& adminLoginPassword.equals("admin")){
                    Intent intentAdmin = new Intent(AdminLoginActivity.this, AdminActivity.class);
                    intentAdmin.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                    startActivity(intentAdmin);
                    finish();
                }else{
                    Toast.makeText(AdminLoginActivity.this, "Failed Login", Toast.LENGTH_SHORT).show();
                    return;
                }
            }
        });
    }
  }

import android.content.Intent;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class AdminActivity extends AppCompatActivity {

    private FirebaseAuth mAdminAuth;
    private Toolbar jAdminToolbar;

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

        mAdminAuth = FirebaseAuth.getInstance();
        jAdminToolbar = (Toolbar) findViewById(R.id.adminToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Administrator");


    }

    @Override
    public void onStart() {
        super.onStart();
        FirebaseUser currentUser = mAdminAuth.getCurrentUser();

        if(currentUser == null){
            sendUserToStartPage();
        }

    }

    private void sendUserToStartPage(){
        Intent intentStart = new Intent(AdminActivity.this, StartActivity.class);
        startActivity(intentStart);
        finish();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        getMenuInflater().inflate(R.menu.activity_admin_menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);

        if(item.getItemId() == R.id.mainSignOutBtn){
            FirebaseAuth.getInstance().signOut();
            sendUserToStartPage();
        }

        if(item.getItemId() == R.id.mainViewContactsBtn){
            Intent intentViewContacts = new Intent(AdminActivity.this, AllUsersActivity.class);
            startActivity(intentViewContacts);
        }

        return true;
    }
}

AdminLoginActivity-->AdminActivity

AdminLoginActivityClass

    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.support.v7.widget.Toolbar;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;

    public class AdminLoginActivity extends AppCompatActivity {

    private Toolbar jAdminToolbar;

    private EditText jAdminID;
    private EditText jAdminPassword;

    private Button jAdminLoginBtn;

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

        jAdminToolbar = (Toolbar) findViewById(R.id.adminLoginToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Admin Login");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        jAdminID = (EditText) findViewById(R.id.adminLoginName);
        jAdminPassword = (EditText) findViewById(R.id.adminLoginPassword);
        jAdminLoginBtn = (Button) findViewById(R.id.adminLoginBtn);

        jAdminLoginBtn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                String adminLoginID = jAdminID.getText().toString();
                String adminLoginPassword = jAdminPassword.getText().toString();

                if(adminLoginID.equals("admin")&& adminLoginPassword.equals("admin")){
                    Intent intentAdmin = new Intent(AdminLoginActivity.this, AdminActivity.class);
                    intentAdmin.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                    startActivity(intentAdmin);
                    finish();
                }else{
                    Toast.makeText(AdminLoginActivity.this, "Failed Login", Toast.LENGTH_SHORT).show();
                    return;
                }
            }
        });
    }
  }

import android.content.Intent;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class AdminActivity extends AppCompatActivity {

    private FirebaseAuth mAdminAuth;
    private Toolbar jAdminToolbar;

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

        mAdminAuth = FirebaseAuth.getInstance();
        jAdminToolbar = (Toolbar) findViewById(R.id.adminToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Administrator");


    }

    @Override
    public void onStart() {
        super.onStart();
        FirebaseUser currentUser = mAdminAuth.getCurrentUser();

        if(currentUser == null){
            sendUserToStartPage();
        }

    }

    private void sendUserToStartPage(){
        Intent intentStart = new Intent(AdminActivity.this, StartActivity.class);
        startActivity(intentStart);
        finish();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        getMenuInflater().inflate(R.menu.activity_admin_menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);

        if(item.getItemId() == R.id.mainSignOutBtn){
            FirebaseAuth.getInstance().signOut();
            sendUserToStartPage();
        }

        if(item.getItemId() == R.id.mainViewContactsBtn){
            Intent intentViewContacts = new Intent(AdminActivity.this, AllUsersActivity.class);
            startActivity(intentViewContacts);
        }

        return true;
    }
}

AdminActivityClass

    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.support.v7.widget.Toolbar;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;

    public class AdminLoginActivity extends AppCompatActivity {

    private Toolbar jAdminToolbar;

    private EditText jAdminID;
    private EditText jAdminPassword;

    private Button jAdminLoginBtn;

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

        jAdminToolbar = (Toolbar) findViewById(R.id.adminLoginToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Admin Login");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        jAdminID = (EditText) findViewById(R.id.adminLoginName);
        jAdminPassword = (EditText) findViewById(R.id.adminLoginPassword);
        jAdminLoginBtn = (Button) findViewById(R.id.adminLoginBtn);

        jAdminLoginBtn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                String adminLoginID = jAdminID.getText().toString();
                String adminLoginPassword = jAdminPassword.getText().toString();

                if(adminLoginID.equals("admin")&& adminLoginPassword.equals("admin")){
                    Intent intentAdmin = new Intent(AdminLoginActivity.this, AdminActivity.class);
                    intentAdmin.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                    startActivity(intentAdmin);
                    finish();
                }else{
                    Toast.makeText(AdminLoginActivity.this, "Failed Login", Toast.LENGTH_SHORT).show();
                    return;
                }
            }
        });
    }
  }

import android.content.Intent;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class AdminActivity extends AppCompatActivity {

    private FirebaseAuth mAdminAuth;
    private Toolbar jAdminToolbar;

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

        mAdminAuth = FirebaseAuth.getInstance();
        jAdminToolbar = (Toolbar) findViewById(R.id.adminToolbar);
        setSupportActionBar(jAdminToolbar);
        getSupportActionBar().setTitle("Administrator");


    }

    @Override
    public void onStart() {
        super.onStart();
        FirebaseUser currentUser = mAdminAuth.getCurrentUser();

        if(currentUser == null){
            sendUserToStartPage();
        }

    }

    private void sendUserToStartPage(){
        Intent intentStart = new Intent(AdminActivity.this, StartActivity.class);
        startActivity(intentStart);
        finish();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        getMenuInflater().inflate(R.menu.activity_admin_menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);

        if(item.getItemId() == R.id.mainSignOutBtn){
            FirebaseAuth.getInstance().signOut();
            sendUserToStartPage();
        }

        if(item.getItemId() == R.id.mainViewContactsBtn){
            Intent intentViewContacts = new Intent(AdminActivity.this, AllUsersActivity.class);
            startActivity(intentViewContacts);
        }

        return true;
    }
}

清单文件

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

由于管理员登录是硬编码的，

FirebaseUser currentUser=mAdminAuth.getCurrentUser（）中的currentUser
设置为null
。这导致活动被发送回起始页（sendUserToStartPage（）；
）
发布完整的代码集后，您应该执行以下操作
comment out the sendUserToStartPage(); inside of the currentuser == null and then try.

为什么?？因为用户是空的。为什么？因为你把它硬编码到代码里了。Firebase中不存在密码为admin的用户admin（如果存在，则您之前从未检查过），因此登录时，您不会为admin创建会话，因此当前用户为null
试着这样做
if ("admin".equals(adminLoginID)) {
    if ("admin".equals(adminLoginPassword)) {
        //goto activity
    }
} else {
    //not admin
}

实际上这可能更好
if (("admin".equals(adminLoginID)) && ("admin".equals(adminLoginPassword))) {
    //goto activity
} else {
    //not admin
}

甚至这个
if (("admin".equals(jAdminID.getText().toString().trim())) && ("admin".equals(jAdminPassword.getText().toString().trim()))) {
    //goto activity
} else {
    //not admin
}

请在清单中尝试此示例。
您的活动缺少主题，这是明显的。
此外，它还遗漏了元数据
<activity
    android:name=".Leagues.CreateLeague"
    android:label="Create League"
    android:parentActivityName=".MainActivity"
    android:screenOrientation="portrait"
    android:theme="@style/AppTheme2">
    <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value="com.aaa.bbb.MainActivity" />
</activity>


像这样巧妙地尝试

全局获取字符串
变量，然后声明并初始化它们

在下一步中，您需要添加验证



很高兴帮助yohThank你的建议，但对我来说不幸的是，它不起作用：（它对我不起作用。在我输入输入并单击登录按钮后，应用程序会提示出一个白色布局几秒钟，并将我带回StartActivity。删除finish标记finish（）；和else语句中的return；标记。没有任何原因。我仍然有相同的问题：（我重新检查了活动的名称，似乎一切都正常……只是我无法在Hank you Vishal上签名，但我发现问题不在于if-else语句，因为当我登录管理员帐户时，FirebaseAuth正在检查当前用户，而当它无法检测到注册用户时……）管理员是硬编码的…它提示我返回主页，就好像我正在注销一样。这就是为什么toast没有显示并且出现了一个白色屏幕。就像代码一样，如果“currentUser==null”，它就是…sendUserToStartPage…它是null，因为硬编码的输入。