小编Pin*_*een的帖子

我想要开始按钮开始计时，停止按钮在那个时候完全停止它，重置按钮让时钟回到“00.00”。每次我点击重置它都会重新启动时间。我只是想让它重置回“00.00”。谢谢你的帮助。这是我的代码：

import android.os.Bundle;
import android.os.SystemClock;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;

public class TimeLogActivity extends ActionBarActivity {Chronometer focus;
Button start, stop, reset;

private Toolbar toolbar;
private DrawerLayout drawerLayout;


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

    toolbar = (Toolbar) findViewById(R.id.app_bar);
    setSupportActionBar(toolbar);


    start = (Button) findViewById(R.id.timeLogStartButton);
    stop = (Button) findViewById(R.id.timeLogStopButton);
    reset  = (Button) findViewById(R.id.timeLogResetButton);

    focus = (Chronometer) findViewById(R.id.timeLogChronometer);


    start.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method …