更新的android TextView的

Question

主要活动

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    etUsername = (TextView) (findViewById(R.id.etUsername)); 
    etPassword = (TextView) (findViewById(R.id.etPassword)); 
    tvRegister = (TextView) (findViewById(R.id.tvRegister)); 
    blogin = (Button) (findViewById(R.id.blogin)); 
} 

public void onClick(View v) { 
    Intent intent=new Intent(v.getContext(),Registeration.class); 
    startActivityForResult(intent, 0); 
} 

public void login(View view){ 
    logid=etUsername.getText().toString(); 
    logpass=etPassword.getText().toString(); 
    String method="login";//my php script 
    BackgroundTask backgroundTask=new BackgroundTask(this); 
    backgroundTask.execute(method, logid, logpass); 


    Bundle bundle = getIntent().getExtras(); 
    String message = bundle.getString("username");//Tried using intent 
    Menu mn=new Menu(); 
    mn.textView9.setText(message); 
} 

Onpostexecute

if(result.contains("Login Successful")) // msg you get from success like "LoginSuccess" 
{ 
    MainActivity mm=new MainActivity(); 
    Intent i = new Intent(ctx,Menu.class); 
    Menu mn=new Menu(); 
    String username=mm.etUsername.getText().toString(); 
    i.putExtra("username",username); 
    ctx.startActivity(i); 
    alertDialog.setMessage(result); 
    alertDialog.show(); 
} 

活动我想在登录的文本，显示

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_menu); 
    i1= (ImageView) (findViewById(R.id.i1)); 
    etUsername=(EditText)(findViewById(R.id.etUsername)); 
    textView9=(TextView)(findViewById(R.id.textView9)); 
} 

Answer 1

您的电话：

 String username = mm.etUsername.getText().toString(); 
     Intent intent = new Intent(getActivity(), Menu.class) 
       .putExtra(Intent.EXTRA_TEXT, username); 
     startActivity(intent); 

接待：

 // The detail Activity called via intent. 
     Intent intent = getActivity().getIntent(); 
     if (intent != null && intent.hasExtra(Intent.EXTRA_TEXT)) { 
      String text = intent.getStringExtra(Intent.EXTRA_TEXT); 
      ((TextView) findViewById(R.id.textView9)) 
        .setText(text); 
     }