CODEWITHSUNDEEP
javaandroid
rltcounter221
rltcounter221

Reputation: 193

How to measure time between clicks?

I want to make a simple timer that will when I click buttonstarts timing and when I click second time on the button I get elapsed time in milliseconds to textView.

public class MainActivity extends AppCompatActivity {
int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final TextView textView = (TextView) findViewById(R.id.textView);
    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            long start = System.currentTimeMillis();
            i++;
            if (i >= 2)
            {
                long end = System.currentTimeMillis();
                long diff = end - start;
                textView.setText(String.valueOf(diff));
            }
        }
    });

}

I get value of 0 when I launch app

Upvotes: 1

Views: 234

Answers (3)

Marcus Gruneau
Marcus Gruneau

Reputation: 827

public class MainActivity extends AppCompatActivity {
private long start = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final TextView textView = (TextView) findViewById(R.id.textView);
    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (start > 0) {
                long end = System.currentTimeMillis();
                long diff = end - start;
                textView.setText(String.valueOf(diff));
                start = 0;
            } else {
                start = System.currentTimeMillis();
            }
    });

}

Upvotes: 1

Abhishek Patel
Abhishek Patel

Reputation: 4328

Try this 

   int i = 1;
   long start,end;

    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (i == 2)
            {
                end = System.currentTimeMillis();
                long diff = end - start;
                textView.setText(String.valueOf(diff));
                i = 1;
            }
            else
            {
                start = System.currentTimeMillis();
                i++;
            }
        }
    });

Upvotes: 0

Suhyeon Lee
Suhyeon Lee

Reputation: 569

You save the start each time you click the button, so start and end should be almost the same. 

final TextView textView = (TextView) findViewById(R.id.textView);
Button button = (Button) findViewById(R.id.button);
long start = -1;
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        if(start < 0)
            start = System.currentTimeMillis();
        else {
            long end = System.currentTimeMillis();
            long diff = end - start;
            textView.setText(String.valueOf(diff));
            start = -1;
        }
    }
});

Upvotes: 0

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