Android时间计时器

时间计时器，效果图在附件中
贴一些代码吧，界面设置比较简单就不放这了，如果觉得是自己想要的就下载附件，附件中包含了界面的设置：
package com.chronometer;import android.app.Activity;import android.os.Bundle;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.os.SystemClock;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Chronometer;import android.widget.EditText;public class TimerTestActivity extends Activity implements OnClickListener{ int startTime = 1;Chronometer chronometer;EditText edtSetTime;Button btnStart;Button btnStop;Button btnReset;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        initView();        /*chronometer.setBase(SystemClock.elapsedRealtime());        //计时开始        chronometer.start();*/        //为计时器设置一个监听事件        chronometer.        setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {@Overridepublic void onChronometerTick(Chronometer chronometer) {//如果开始计时到现在超过了startime秒if (SystemClock.elapsedRealtime()-chronometer.getBase()>startTime*10000) {//停止计时chronometer.stop();//显示警告“时间到”框showDialog();}}});    }    //初始化变量    private void initView(){    chronometer = (Chronometer) findViewById(R.id.chronometer);    edtSetTime = (EditText) findViewById(R.id.edt_settime);    btnStart = (Button) findViewById(R.id.btnStart);    btnStop = (Button) findViewById(R.id.btnStop);    btnReset = (Button) findViewById(R.id.btnReset);    btnStart.setOnClickListener(this);    btnStop.setOnClickListener(this);    btnReset.setOnClickListener(this);    }        //显示弹出式对话框    private void showDialog() {    AlertDialog.Builder builder = new AlertDialog.Builder(this);    builder.setIcon(R.drawable.icon);    builder.setTitle("警告").setMessage("时间到").setPositiveButton("确定",    new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {}});    AlertDialog dialog = builder.create();    dialog.show();}        //按钮的监听器@Overridepublic void onClick(View v) {switch (v.getId()) {//开始计时按钮的监听case R.id.btnStart:{System.out.println("开始计时----");String ss = edtSetTime.getText().toString();if (!(ss.equals(""))&&ss!=null) {startTime = Integer.parseInt(ss);System.out.println("startTime:"+startTime);}//设置开始计时时间chronometer.setBase(SystemClock.elapsedRealtime());chronometer.start();}break;//停止计时按钮的监听case R.id.btnStop:{chronometer.stop();}break;//重新计时按钮的监听case R.id.btnReset:{chronometer.setBase(SystemClock.elapsedRealtime());chronometer.start();}break;default:break;}}}
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