如何直接打開一個不是主要活動的活動，然後移動到主要活動的Android應用程序？

以下是我的mainActivity - 直到onCreate函數，沒有導入。我將其定義爲我父母的大部分活動。我希望我的應用在登錄活動中打開 - 用戶在使用應用之前將登錄。登錄後，我希望打開此活動。如何直接打開一個不是主要活動的活動，然後移動到主要活動的Android應用程序？

public class MainActivity extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener { 

public final String APP_TAG = "MyCustomApp"; 
public final static int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 1034; 
public String photoFileName = "photo.jpg"; 
public final int MY_PERMISSIONS_REQUEST_CAMERA = 66; 
public static final int MEDIA_TYPE_IMAGE = 1; 
public static final int MEDIA_TYPE_VIDEO = 2; 
private static final int CAMERA_REQUEST = 1888; 

final int REQUEST_LOG_IN = 666; 

FirebaseDatabase database = FirebaseDatabase.getInstance(); 
String m_Text; 
User user = null; 
DatabaseReference myRef; 
DatabaseReference userRef; 


@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 

    //default text 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
     this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.setDrawerListener(toggle); 
    toggle.syncState(); 

    tryGetUser(); 
}

以下是我的LoginActivity - 直到onCreate函數，沒有導入。我想成爲第一個打開的頁面

public class LoginActivity extends BaseActivity implements LoaderCallbacks<Cursor> { 


final int RC_SIGN_IN = 101; 

final int REQUEST_LOG_IN = 666; 

/** 
* Id to identity READ_CONTACTS permission request. 
*/ 
private static final int REQUEST_READ_CONTACTS = 0; 

/** 
* Keep track of the login task to ensure we can cancel it if requested. 
*/ 
private UserLoginTask mAuthTask = null; 

// UI references. 
private AutoCompleteTextView mEmailView; 
private EditText mPasswordView; 
private View mProgressView; 
private View mLoginFormView; 
private FirebaseAuth mAuth; 

private GoogleApiClient mGoogleApiClient; 

@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 

    mAuth = FirebaseAuth.getInstance(); 

    setContentView(R.layout.activity_login); 
    // Set up the login form. 
    mEmailView = (AutoCompleteTextView) findViewById(R.id.email); 
    populateAutoComplete(); 

    mPasswordView = (EditText) findViewById(R.id.password); 
    mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() { 
     @Override 
     public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) { 
      if (id == R.id.login || id == EditorInfo.IME_NULL) { 
       attemptLogin(); 
       return true; 
      } 
      return false; 
     } 
    });

來源

2017-04-08 user7337642

代碼是一個文本。請發佈您的代碼，而不是截圖 –

這是否更好？這是我在stackoverflow上的第一個問題，所以我仍然在研究如何提出問題，需要什麼信息來回答我的問題等。 – user7337642

好得多。謝謝 –