首先,我是一个Android的初学者。我正在使用Firebase开发一个简单的登录应用程序,在运行代码时遇到了以下运行时异常。我正在使用电话号码验证,应用程序已经成功安装,但是我无法进入TuserActivity,请问有人能告诉我如何解决这个问题吗?
java.lang.RuntimeException: 无法实例化组件信息 TuserActivity:java.lang.IllegalAccessException:从类android.app.Instrumentation无法访问类TuserActivity
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
public EditText emailId, passwd;
Button btnSignUp;
TextView signIn,txuser;
FirebaseAuth firebaseAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseAuth = FirebaseAuth.getInstance();
emailId = findViewById(R.id.ETemail);
passwd = findViewById(R.id.ETpassword);
btnSignUp = findViewById(R.id.btnSignUp);
signIn = findViewById(R.id.TVSignIn);
txuser = findViewById(R.id.tuser);
btnSignUp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String emailID = emailId.getText().toString();
String paswd = passwd.getText().toString();
if (emailID.isEmpty()) {
emailId.setError("Enter your E-mail");
emailId.requestFocus();
} else if (paswd.isEmpty()) {
passwd.setError("Enter your password");
passwd.requestFocus();
} else if (emailID.isEmpty() && paswd.isEmpty()) {
Toast.makeText(MainActivity.this, "Fields Empty!", Toast.LENGTH_SHORT).show();
} else if (!(emailID.isEmpty() && paswd.isEmpty())) {
firebaseAuth.createUserWithEmailAndPassword(emailID, paswd).addOnCompleteListener(MainActivity.this, new OnCompleteListener() {
@Override
public void onComplete(Task task) {
if (!task.isSuccessful()) {
Toast.makeText(MainActivity.this.getApplicationContext(),
"SignUp unsuccessful: " + task.getException().getMessage(),
Toast.LENGTH_SHORT).show();
} else {
startActivity(new Intent(MainActivity.this, UserActivity.class));
}
}
});
} else {
Toast.makeText(MainActivity.this, "Error", Toast.LENGTH_SHORT).show();
}
}
});
signIn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent I = new Intent(MainActivity.this, Activity_Login.class);
startActivity(I);
}
});
txuser.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent I = new Intent(MainActivity.this, TuserActivity.class);
startActivity(I);
}
});
}
}
清单:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".Activity_Login"></activity> <meta-data android:name="com.google.android.geo.API_KEY" android:value="@string/google_maps_key" /> <activity android:name=".MapsActivity"></activity> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".UserActivity" /> <activity android:name=".VerifyPhoneActivity" /> <activity android:name=".TuserActivity" /> </application>