پروژه ساعت ساده مکتب خونه بخش دوم- نمایش خودکار تاریخ- هندلر-کرنومتر-کرونومتر

 

    SimpleDateFormat df;
    TextView elapsed;
    Button startbt, pausebt;
    Long time=0L,starttime;
    Handler hn;
     df = new SimpleDateFormat("HH:mm:ss:SSS");
        df.setTimeZone(TimeZone.getTimeZone("UTC"));
   
        hn=new Handler();

    private Runnable runnable =new Runnable() {
        @Override
        public void run() {
            time=SystemClock.uptimeMillis()-starttime;
            elapsed.setText(df.format(time));

            hn.postDelayed(this,0);
        }
    };

        elapsed.setText(df.format(0L));




startbt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                starttime = SystemClock.uptimeMillis();
                hn.postDelayed(runnable, 0);
            }
        });

        pausebt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                hn.removeCallbacks(runnable);
               }
        });

    @Override
    public void onPause() {
        super.onPause();
        hn.removeCallbacks(runnable);
    }

 

 

 

 

package ir.maktabkhune.android.simpleclock;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.ViewGroup;
import android.os.Handler;
import android.os.SystemClock;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.TimeZone;


public class fragstopw extends Fragment {

    SimpleDateFormat df;
    TextView elapsed;
    Button startbt, pausebt;
    Long time=0L,starttime;
    Handler hn;


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragmentstopwatch, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        config(view);
        onclicks(view);

        pausebt.setEnabled(false);
        elapsed.setText(df.format(0L));
    }

    private void onclicks(View view) {
        startbt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                starttime = SystemClock.uptimeMillis();
                hn.postDelayed(runnable, 0);
                pausebt.setEnabled(true);
                startbt.setEnabled(false);
            }
        });

        pausebt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                hn.removeCallbacks(runnable);
                pausebt.setEnabled(false);
                startbt.setEnabled(true);
            }
        });

    }

    private void config(View v) {
        df = new SimpleDateFormat("HH:mm:ss:SSS");
        df.setTimeZone(TimeZone.getTimeZone("UTC"));
        startbt=v.findViewById(R.id.stop_watch_start_btn);
        pausebt=v.findViewById(R.id.stop_watch_stop_btn);
        elapsed=v.findViewById(R.id.stop_watch_time_passed);
        hn=new Handler();
    }

    private Runnable runnable =new Runnable() {
        @Override
        public void run() {
            time=SystemClock.uptimeMillis()-starttime;
            elapsed.setText(df.format(time));

            hn.postDelayed(this,0);
        }
    };

    @Override
    public void onPause() {
        super.onPause();
        hn.removeCallbacks(runnable);
        pausebt.setEnabled(false);
        startbt.setEnabled(true);

    }

}