Android studio: How to create BiometricManager and other bugs - android-studio

Question

So as a homework from collage i have to make a simple login app using fingerprint, i followed this video: How to Make a FingerPrint Authentication System in Android Studio and Java
But im getting some error that aren't explained and i can't find a answer form, this is my code:
package com.example.actividad14;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import android.graphics.Color;
import android.hardware.biometrics.BiometricManager;
import android.hardware.biometrics.BiometricPrompt;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.util.concurrent.Executor;
public class MainActivity extends AppCompatActivity {
#RequiresApi(api = Build.VERSION_CODES.Q)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView msg_txt = findViewById(R.id.txt_msg);
Button login_btn = findViewById(R.id.login_btn);
BiometricManager biometricManager = BiometricManager.from(this);
switch (biometricManager.canAuthenticate()){
case BiometricManager.BIOMETRIC_SUCCESS:
msg_txt.setText("You can use the fingerprint sensor to login");
msg_txt.setTextColor(Color.parseColor("#Fafafa"));
break;
case BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE:
msg_txt.setText("The device doesn't have a fingerprint sensor");
login_btn.setVisibility(View.GONE);
break;
case BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE:
msg_txt.setText("The biometric sensor is currently unavailable");
login_btn.setVisibility(View.GONE);
break;
case BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED:
msg_txt.setText("Your device doesn't have any fingerprint saved, please check your security settings");
login_btn.setVisibility(View.GONE);
break;
}
Executor executor = ContextCompat.getMainExecutor(this);
BiometricPrompt biometricPrompt = new BiometricPrompt(MainActivity.this, executor, new androidx.biometric.BiometricPrompt.AuthenticationCallback() {
#Override
public void onAuthenticationError(int errorCode, #NonNull CharSequence errString) {
super.onAuthenticationError(errorCode, errString);
}
#Override
public void onAuthenticationSucceeded(#NonNull androidx.biometric.BiometricPrompt.AuthenticationResult result) {
super.onAuthenticationSucceeded(result);
Toast.makeText(getApplicationContext(),"Login Succes!", Toast.LENGTH_SHORT).show();
}
#Override
public void onAuthenticationFailed() {
super.onAuthenticationFailed();
}
});
final BiometricPrompt.PrompInfo prompInfo = BiometricPrompt.PrompInfo.Builder()
.setTitle("Login")
.setDescription("Use your fingerprint to login in your app")
.setNegativeButtonText("Cancel")
.build();
login_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
biometricPrompt.authenticate(prompInfo);
}
});
}
}
At BiometricManager biometricManager = BiometricManager.from(this); im getting "cannot resolve method 'from' in 'biometricmanager'", but every video i have seen says that you create your BiometricManager this way.
At BiometricPrompt biometricPrompt = new BiometricPrompt(MainActivity.this, executor, new androidx.biometric.BiometricPrompt.AuthenticationCallback() { im getting "'BiometricPrompt' has private access in 'android.hardware.biometrics.BiometricPrompt'".
At final BiometricPrompt.PrompInfo prompInfo = BiometricPrompt.PrompInfo.Builder() im getting "cannot resolve PromptInfo"
And finally at biometricPrompt.authenticate(prompInfo); im getting "cannot resolve method '(authenticate(BiometricPrompt.PrompInfo))'"

Answer 1

Sorry for the inconvinience, i fount out what was wrong, instead of using:
import android.hardware.biometrics.BiometricManager;
import android.hardware.biometrics.BiometricPrompt;
use
import androidx.biometric.BiometricManager;
import androidx.biometric.BiometricPrompt;
in the build.gradle i used
implementation 'androidx.biometric:biometric:1.2.0-alpha04'
But this can depend on new updates, so try with the newer ones also:
https://mvnrepository.com/artifact/androidx.biometric/biometric?repo=google
And finally i had PrompInfo instead of PromptInfo
This other post really helped me:
Android BiometricPrompt: Cannot resolve symbol PromptInfo