Android的意圖：檢索意圖參數

Question

假設系統沒有錯誤和警告，是否有這樣的：

Wanted_LoginController.java：

Intent intent = new Intent(loginMVC.getLoginView(),ErrorView.class); 
intent.putExtra("errorMsg", errorMsg); 
loginMVC.getLoginView().startActivity(intent); 

Wanted_ErrorView.java：

Intent executedIntent = getIntent(); 
LoginMVC loginMVC = executedIntent.getParameter1(); //will store loginMVC context from previous intent data 
ErrorView errorView = executedIntent.getParameter2(); //will store errorview from previous intent data 

MY CUSTOM OBJECTS

ErrorView.java：

public class ErrorView extends Activity{ 
    ErrorView context; 
    Bundle extras; 

} 

LoginView.java：

public class LoginView extends ListActivity{ 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.listview); 
    //check the device's connection to the internet 
    ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); 
    NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); 

    if(mWifi.isConnected()){ 
     new LoginController(new LoginMVC(new LoginData(), this)); //builds a new controller for the login process  
    }else{ //blocks the user to proceed to login when internet connection is not available 
     finish(); 
     Intent intent = new Intent(this,ErrorView.class); 
     intent.putExtra("errorMsg", "Please enable Wi-Fi"); 
     startActivity(intent); 
    } 
    } 
} 

LoginMVC.java：

public class LoginMVC{ 
    LoginData loginModel; 
    LoginView loginView; 
    LoginController loginController; 

    public LoginMVC(LoginData pLoginModel, LoginView pLoginView, LoginController pLoginController){ 
    loginModel = pLoginModel; 
    loginView = pLoginView; 
    loginController = pLoginController; 
    } 

    public LoginMVC(LoginData pLoginModel, LoginView pLoginView){ 
    loginModel = pLoginModel; 
    loginView = pLoginView; 
    } 

    public LoginController getLoginController(){ 
    return loginController;} 
} 

謝謝！

Answer 1

你的意思是檢索執行的意圖本身的參數？

截至目前，仍然沒有辦法做到這一點。

Answer 2

請參閱http://developer.android.com/reference/android/content/Intent.html 特別是：getExtras()。它返回一個Bundle，從中您可以讀取您添加到Intent中的參數與putExtra()

Answer 3

是的，您可以。 您可以將源代碼包傳遞給源活動的意圖，並獲取目標活動的意圖。

下面是一個例子，

//你的源活動代碼：

  Bundle bundle = new Bundle(); 
      String s = "Hello world"; 
      bundle.putString("alpha", s); 
      i = new Intent(this, DestinationActivity.class); 
      i.putExtras(bundle); 
      startActivity(i); 

//你的目的地活動代碼：

 Bundle b = this.getIntent().getExtras(); 

    if (b.containsKey("alpha")) { 

      String text = (String) getIntent().getSerializableExtra("alpha"); 
     // Now you can use text i.e you can show toast e.t.c 


    }