How to disable a button in onCreate method with if statment

Question

I have a problem, I want to disable a button in onCreate method, please share the way of disabling any button at runtime in onCreate method.

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


  Intent intent = new Intent(this, AdminPopup.class);
    startActivity(intent);


    String fName = getIntent().getStringExtra("fName");
    TextView tfName = (TextView)findViewById(R.id.fName);
    tfName.setText(fName);
    String vuEmail = getIntent().getStringExtra("VUEmail");
    TextView tEmail = (TextView)findViewById(R.id.vuEmail);
    tEmail.setText(vuEmail);

    EditText vuEmailTest = (EditText)findViewById(R.id.vuEmail);
    String email = vuEmailTest.getText().toString();
    String str = email.substring(0,2);
    if(str.equals("bc")){
        String str2 = email.substring(3,9);
        boolean digitsOnly = TextUtils.isDigitsOnly(str2);
        if (digitsOnly){
            Button accButton = (Button)findViewById(R.id.accButton);

        }
    }
    else{
        Button accButton = (Button)findViewById(R.id.accButton);

    }

}

Set it as disabled in your layout. So, when you'll add it through `setContentView()` you'll find it already disabled. By doing so, you won't need any extra code. Except that to re-enable it later. — Phantômaxx, Jul 17 '17 at 17:55
Check this, https://stackoverflow.com/questions/4384890/how-to-disable-an-android-button — UmarZaii, Jul 17 '17 at 17:57

score 2 · Answer 1 · answered Jul 17 '17 at 17:55

2

Try this:

    Button accButton = (Button) findViewById(R.id.accButton);
    accButton.setEnabled(false);

Note that in your posted code, you are setting the button with findViewbyId(), which should be findViewById() (the By needs to be capitalized).

answered Jul 17 '17 at 17:55

Ben P.

52,661
6
95
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Can I use if statement in onCreate method ? Because I have to take some checks and then have to disable the button – bs140200456 Aqsa Anum Jul 17 '17 at 18:01
Sure. Or you can write something like `accButton.setEnabled(check1 && check2);` – Ben P. Jul 17 '17 at 18:01
Its just giving runtime error after putting if statments in it – bs140200456 Aqsa Anum Jul 17 '17 at 18:10

SiSa · Answer 2 · 2017-07-17T18:31:57.920

1

Use android:enabled="false" in xml or accButton.setEnabled(false) in code
Also, it's better to check is numeric by this method:

public static boolean isNumeric(String str) {
    try {
        double d = Double.parseDouble(str);
    } catch (NumberFormatException nfe) {
        return false;
    }
    return true;
}

edited Jul 17 '17 at 18:31

answered Jul 17 '17 at 17:58

SiSa

2,594
1
15
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Can I use if statement in onCreate method ? Because I have to take some checks and then have to disable the button – bs140200456 Aqsa Anum Jul 17 '17 at 18:01
@bs140200456AqsaAnum Yes, why not – SiSa Jul 17 '17 at 18:03
I just putted if statment and now it is giving runtime error – bs140200456 Aqsa Anum Jul 17 '17 at 18:09
@bs140200456AqsaAnum Include your if statement – SiSa Jul 17 '17 at 18:12
Can I edit above coding and How, I will put my current code there – bs140200456 Aqsa Anum Jul 17 '17 at 18:14
Edit your question or send it as comment here – SiSa Jul 17 '17 at 18:18
I just edited my post. if statement in onCreate method.And after adding this statement it is giving error runtime – bs140200456 Aqsa Anum Jul 17 '17 at 18:20
what is error said? is email always has more than 9 characters? – SiSa Jul 17 '17 at 18:24
Error is application stopped working. And yes email has more than 9 chars – bs140200456 Aqsa Anum Jul 17 '17 at 18:25
You can read error from log. If you are not sure about length of email, then check it before substring – SiSa Jul 17 '17 at 18:27
let me check this – bs140200456 Aqsa Anum Jul 17 '17 at 18:32
Edited my answer. use `isNumeric` method instead of `TextUtils.isDigitsOnly` – SiSa Jul 17 '17 at 18:33
I think its not the problem with email lenght, after starting AdminPopup.class , current activity doesnot starts – bs140200456 Aqsa Anum Jul 17 '17 at 18:38

score 1 · Accepted Answer · answered Jul 17 '17 at 18:09

1

Button button =(Button) findViewById(R.id.buttonid); button.setVisibility(View.GONE);

answered Jul 17 '17 at 18:09

Lakshmi Priya Vikram

26
4

score 1 · Answer 4 · answered Jul 17 '17 at 18:53

1

Do this:

Button b = (Button) findViewById(R.id.mybutton);
b.setEnabled(false);

answered Jul 17 '17 at 18:53

Elysian Apps

106
3

How to disable a button in onCreate method with if statment

4 Answers4