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signin.java

+package com.example.peopluz1;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Patterns;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+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;
+
+public class signin extends AppCompatActivity {
+    private Button login;
+    EditText mEmail,mPassword;
+    FirebaseAuth fAuth;
+    String userID;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_signin);
+
+        fAuth = FirebaseAuth.getInstance();
+
+        login = findViewById(R.id.btnlogin);
+        mEmail = findViewById(R.id.email);
+        mPassword = findViewById(R.id.pass);
+
+        if(fAuth.getCurrentUser() != null){
+            startActivity(new Intent(getApplicationContext(), home.class));
+            finish();
+        }
+
+        login.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+
+                String email = mEmail.getText().toString().trim();
+                String password = mPassword.getText().toString().trim();
+
+                if(TextUtils.isEmpty(email) || !Patterns.EMAIL_ADDRESS.matcher(email).matches()){
+                    mEmail.setError("Email is Required.");
+                    return;
+                }
+
+                if(TextUtils.isEmpty(password)){
+                    mPassword.setError("Password is Required.");
+                    return;
+                }
+
+                if(password.length() < 6){
+                    mPassword.setError("Password Must be >= 6 Characters");
+                    return;
+                }
+
+                fAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
+                    @Override
+                    public void onComplete(@NonNull Task<AuthResult> task) {
+                        if(task.isSuccessful()){
+                            Toast.makeText(signin.this, "Logged in Successfully", Toast.LENGTH_SHORT).show();
+                            startActivity(new Intent(getApplicationContext(),home.class));
+                        }else {
+                            Toast.makeText(signin.this, "Error ! " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
+
+                        }
+
+                    }
+                });
+
+//                Intent intent = new Intent(signin.this,home.class);
+//                startActivity(intent);
+//                finish();
+
+            }
+        });
+    }
+}
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