Question

I am creating a login screen for my application with more than 1 authentication. Now when i login the app with the first name and password, then it works but when i try the other names and password then it force closes the application.

我正在利用Fe和Else进行原木筛查。

if (uName.equals("A") && uPass.equals("123")) 
{
    Intent cardSummaryScreen = new Intent(LoginActivity.this, Hi.class);
    b = new Bundle();

    EditText text1 = (EditText)findViewById(R.id.inputUserName);
    b.putString("name", text1.getText().toString());
    hi.putExtras(b);

    startActivity(hi);
}

else if(uName.equals("sumit") && uPass.equals("456")) 
{
    Intent cardSummaryScreen1 = new
    Intent(LoginActivity.this,Hi.class);

    Bundle c= new Bundle();
    EditText text2= (EditText)findViewById(R.id.inputUserName);
    c.putString("name",text2.getText().toString());

    startActivity(cardSummaryScreen1);

Answer 1

即便是你拖了一步,但我认为我可以看到,你的 app弄错了,部队关闭了。

In your second IF/ELSE statement, you try to add extra data to your new hi1 intent. However, you re trying to add b. This does not exist in your second statement, only in the first.

因此,贵方正试图增加现成的数据,并附上和关。

Intent hi1 = new
              Intent(LoginActivity.this,Hi.class);


              Bundle c= new Bundle();

              EditText text2= (EditText)findViewById(R.id.inputUserName);

              c.putString("name",text2.getText().toString());
              hi1.putExtras(b); // b does not exist. This causes a NullPointerException
              startActivity(hi1);

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