Question

运行我的应用程序时，会弹出此错误：

E / Android运行时：致命异常：主要流程：com.example.mymainapp，PID：10811 java.lang.IllegalArgumentException：给定的String为空或null com.google.android.gms.common.internal.Preconditions.checkNotEmpty处（未知来源：5） com.google.firebase.auth.FirebaseAuth.signInWithEmailAndPassword处（未知来源：199）在com.example.mymainapp.MainActivity.validate（MainActivity.java:77）在com.example.mymainapp.MainActivity.access $ 200（MainActivity.java:23）在com.example.mymainapp.MainActivity $ 1.onClick（MainActivity.java:55）在android.view.View.performClick（View.java:7352）在android.widget.TextView.performClick（TextView.java:14177）在android.view.View.performClickInternal（View.java:7318）在android.view.View.access $ 3200（View.java:846）在android.view.View $ PerformClick.run（View.java:27800）在android.os.Handler.handleCallback（Handler.java:873）在android.os.Handler.dispatchMessage（Handler.java:99）在android.os.Looper.loop（Looper.java:214）在android.app.ActivityThread.main（ActivityThread.java:7050）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:493）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:965）

这是我的代码（MainActivity）：

public class MainActivity extends AppCompatActivity {

    private TextView InicioDeSes, NuevaCuenta;
    private EditText CorreoEletric, Contrasena;
    private Button IniciarSesion;
    private FirebaseAuth firebaseAuth;
    private ProgressDialog progressDialog;

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

        CorreoEletric = findViewById(R.id.etCorreoEletr);
        Contrasena = findViewById(R.id.etPassword);
        IniciarSesion = findViewById(R.id.btnEntrar);
        InicioDeSes = findViewById(R.id.tvIniciarSesión);
        NuevaCuenta = findViewById(R.id.tvNuevaCuenta);
        firebaseAuth = FirebaseAuth.getInstance();
        progressDialog = new ProgressDialog(this);

        FirebaseUser user = firebaseAuth.getCurrentUser();

        if(user != null){
            finish();
            startActivity(new Intent(MainActivity.this, HomeActivity.class));
        }


        IniciarSesion.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                validate(CorreoEletric.getText().toString(), Contrasena.getText().toString());
            }
        });


        NuevaCuenta.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                moveToRegisterActivity();
            }
        });

    }


    private void validate(String CorreoEletric, String Contrasena) {

        progressDialog.setMessage("Aguarde, estamos verificando tu cuenta!");
        progressDialog.show();

        firebaseAuth.signInWithEmailAndPassword(CorreoEletric, Contrasena).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if(task.isSuccessful()){
                    progressDialog.dismiss();
                    startActivity(new Intent(MainActivity.this, HomeActivity.class));
                }else{
                    progressDialog.dismiss();
                    Toast.makeText(MainActivity.this, "Algo ha fallado al iniciar sesión, por favor verifique los campos", Toast.LENGTH_LONG).show();
                }
            }
        });

    }

    private void moveToRegisterActivity(){

        Intent intent = new Intent(MainActivity.this, registrationActivity.class);
        startActivity(intent);
    }
}

这不是API KEY，我已经检查过了。另外，当我按下按钮（tvIniciarSesión）登录应用程序时，会出现错误，该应用程序崩溃。

运行我的应用时，“字符串为空或空”

0 个答案: