chronometer start on initial button click

Question

All of my code works fine no errors, button click increases textview by 1 every click and starts the chronometer.

public class MainActivity extends Activity{

    TextView txtCount;
    Button btnCount;
    int count=0;
    Chronometer chrono;

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

        chrono=(Chronometer) findViewById(R.id.chronometer);
        txtCount=(TextView) findViewById(R.id.textView);
        btnCount=(Button)findViewById(R.id.button);

        btnCount.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            //onclick increase textView by 1
                count++;
                txtCount.setText(String.valueOf(count));
            //on button click start the chronometer at 00:00
                btnCount.setEnabled(true);
                chrono.setBase(SystemClock.elapsedRealtime());
                chrono.start();

            }
    });
}}

...but, as my code reads the chronometer is reset and started every button click. is there a way to start the chronometer on the 1st button click and then continue to use the same button to increase textview but have no interaction with the chronometer widget?

score 0 · Accepted Answer · answered Oct 08 '15 at 18:54

Just use a boolean to check if your chronometer is started already ?

boolean mIsStarted = false;
...

btnCount.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
        //onclick increase textView by 1
            count++;
            txtCount.setText(String.valueOf(count));
        //on button click start the chronometer at 00:00
            btnCount.setEnabled(true);
            if (!mIsStarted) {
                chrono.setBase(SystemClock.elapsedRealtime());
                chrono.start();
                mIsStarted = true;
            }

}

chronometer start on initial button click

1 Answers1