QR code comparison to string ANDROID

Question

I'm using compile 'com.google.android.gms:play-services:10.2.0' (https://developers.google.com/android/reference/com/google/android/gms/vision/barcode/Barcode.html#valueFormat) to read QR code. I want to be compare my read QR to a String. If it matches, it should display a message.

  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
        if (data != null) {
            final Barcode barcode = data.getParcelableExtra("barcode");
            // I also tried barcode.displayValue!
            final String password = barcode.rawValue;

            if (password == "123456") {
                resultText.post(new Runnable() {
                    @Override
                    public void run() {
                        resultText.setText("Sucess");
                    }
                });

When I display my QR code, it reads 123456, but comparing it to "123456" doesn't work.

I thought displayValue and rawValue were casting my QR into a string. Does anyone have any idea? Thanks

JohnHoulderUK · Accepted Answer · 2017-03-02 09:30:09Z

1

You would have to use password.equals("123456") to compare your strings. the == operator checks to see if the strings are the exact same object instead of having the same value.

  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
        if (data != null) {
            final Barcode barcode = data.getParcelableExtra("barcode");
            // I also tried barcode.displayValue!
            final String password = barcode.rawValue;

            if (password.equals("123456")) {
                resultText.post(new Runnable() {
                    @Override
                    public void run() {
                        resultText.setText("Sucess");
                    }
                });

answered Mar 2, 2017 at 9:30

JohnHoulderUK

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1 Comment

user258813 Over a year ago

Thanks for your comment. It was simple, but well explained. =] It solved my problem.

Zubair Akber · Accepted Answer · 2017-03-02 09:30:40Z

1

Use equals it will return true if they are equal otherwise return false for details

password.equals("12345")

answered Mar 2, 2017 at 9:30

Zubair Akber

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Comments

Navneet Kumar · Accepted Answer · 2017-03-02 09:38:53Z

1

use password.equals("123456"), which is valid for comparing strings. I hope this will resolve your problem. As "==" compares the reference of the value in strings, where as .equals() compare the actual value .

answered Mar 2, 2017 at 9:38

Navneet Kumar

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