Android应用在启动后立即崩溃

Question

我目前正在使用Firebase进行数据库管理的Android应用程序上工作。我已经创建了一个登录屏幕，但是在启动时，该应用会立即加载并退出。我厌倦了清理项目，在模拟器上卸载和安装应用程序，调试以及对应用程序进行操作。

这是我用于登录屏幕的代码

public class MainActivity extends AppCompatActivity {

    private EditText mEmailField;
    private EditText mPasswordField;
    private Button mLoginBtn;

    private FirebaseAuth mAuth;

    private FirebaseAuth.AuthStateListener mAuthListener;

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

        mAuth = FirebaseAuth.getInstance();

        mEmailField = (EditText)findViewById(R.id.emailField);
        mPasswordField =  (EditText)findViewById(R.id.passwordField);

        mLoginBtn = (Button)findViewById(R.id.loginBtn);

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {

              if(firebaseAuth.getCurrentUser() !=null)  {
                  startActivity(new Intent(MainActivity.this, Account.class));
              }
            }
        };

        mLoginBtn.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View view){
                startSignIn();
            }
        });
    }

   @Override
   protected void onStart(){
        super.onStart();
        mAuth.addAuthStateListener(mAuthListener);
   }

private  void startSignIn() {

    String email = mEmailField.getText().toString();
    String password = mPasswordField.getText().toString();

    if (TextUtils.isEmpty(email) || TextUtils.isEmpty(password)) {

        Toast.makeText(MainActivity.this, "fields are empty", Toast.LENGTH_LONG).show();

    } else {
        mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete (@NonNull Task<AuthResult> task) {
                if (!task.isSuccessful()) {
                    Toast.makeText(MainActivity.this, "sign in fail", Toast.LENGTH_LONG).show();
                }
            }
        });
     }

    }

}

我在这里附上了我的logcat：

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.fireapp, PID: 12509
    java.lang.RuntimeException: Unable to get provider com.google.android.gms.ads.MobileAdsInitProvider: java.lang.IllegalStateException: 



        at android.app.ActivityThread.installProvider(ActivityThread.java:6396)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:5938)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5853)
        at android.app.ActivityThread.access$1100(ActivityThread.java:199)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.IllegalStateException: 



        at com.google.android.gms.internal.ads.zzmn.attachInfo(Unknown Source:17)
        at com.google.android.gms.ads.MobileAdsInitProvider.attachInfo(Unknown Source:3)
        at android.app.ActivityThread.installProvider(ActivityThread.java:6391)
            ... 10 more