Android 开发第七弹：简易时钟（秒表）

来源：互联网发布：股票虚拟盘软件编辑：程序博客网时间：2024/05/01 21:06

本文承接，Android 开发第五弹：简易时钟（闹钟）和 Android 开发第六弹：简易时钟（计时器），这一部分是关于秒表的。

这里写图片描述

布局

同样是新建一个类（StopWatchView）并扩展自LinearLayout，并将其用作布局。

<myapplication.nomasp.com.clock.StopWatchView    android : id = "@+id/tabStopWatch"    android : layout_width = "match_parent"    android : layout_height = "match_parent"    android : orientation = "vertical">    <LinearLayout    android : layout_width = "match_parent"    android : layout_height = "wrap_content"    android : orientation = "horizontal">    <TextView    android : id = "@+id/tvHour"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : text = ":"    android : layout_width = "wrap_content"    android : layout_height = "wrap_content"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : id = "@+id/tvMinute"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : text = ":"    android : layout_width = "wrap_content"    android : layout_height = "wrap_content"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : id = "@+id/tvSecond"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : text = "."    android : layout_width = "wrap_content"    android : layout_height = "wrap_content"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    <TextView    android : id = "@+id/tvMSceond"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : textAppearance = "?android:attr/textAppearanceLarge" / >    < / LinearLayout>    <ListView    android : id = "@+id/lvWatchTimeList"    android : layout_width = "match_parent"    android : layout_height = "0dp"    android : layout_weight = "1">    < / ListView>    <LinearLayout    android : orientation = "horizontal"    android : layout_width = "match_parent"    android : layout_height = "wrap_content">    <Button    android : id = "@+id/btnSWStart"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : text = "@string/start" / >    <Button    android : id = "@+id/btnSWPause"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : text = "@string/pause" / >    <Button    android : id = "@+id/btnSWResume"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : text = "@string/resume" / >    <Button    android : id = "@+id/btnSWRecord"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : text = "@string/record" / >    <Button    android : id = "@+id/btnSWReset"    android : layout_width = "0dp"    android : layout_height = "wrap_content"    android : layout_weight = "1"    android : text = "@string/reset" / >    < / LinearLayout></myapplication.nomasp.com.clock.StopWatchView>

StopWatchView

同样是一开始要定义好的这些balabala的东西：

    private int tenMSecs = 0;    private Timer timer = new Timer();    private TimerTask timerTask = null;    private TimerTask showTimeTask = null;    private TextView tvHour, tvMinute, tvSecond, tvMSecond;    private Button btnSWStart, btnSWResume, btnSWReset, btnSWPause, btnSWRecord;    private ListView lvWatchTimeList;    private ArrayAdapter<String> adapter;    private static final int MSG_WHAT_SHOW_TIME = 1;    public StopWatchView(Context context) {        super(context);    }    public StopWatchView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public StopWatchView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }

看看这些注释，发现和前面两篇的也没有区别啊，我就不废话直接上代码好了。

 @Override    protected void onFinishInflate(){        super.onFinishInflate();        // 为每个相应的TextView控件设置成0        tvHour = (TextView)findViewById(R.id.tvHour);        tvHour.setText("0");        tvMinute = (TextView)findViewById(R.id.tvMinute);        tvMinute.setText("0");        tvSecond = (TextView)findViewById(R.id.tvSecond);        tvSecond.setText("0");        tvMSecond = (TextView)findViewById(R.id.tvMSceond);        tvMSecond.setText("0");        // 为每个Button设置监听事件        btnSWRecord = (Button)findViewById(R.id.btnSWRecord);        btnSWRecord.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                adapter.insert(String.format("%d:%d:%d.%d",                        tenMSecs/100/60/60,                        tenMSecs/100/60%60,                        tenMSecs/100%60,                        tenMSecs%100),                        0);            }        });        btnSWPause = (Button)findViewById(R.id.btnSWPause);        btnSWPause.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 停止                stopTimer();                btnSWPause.setVisibility(View.GONE);                btnSWResume.setVisibility(View.VISIBLE);                btnSWReset.setVisibility(View.VISIBLE);                btnSWRecord.setVisibility(View.GONE);            }        });        btnSWReset = (Button)findViewById(R.id.btnSWReset);        btnSWReset.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 停止                stopTimer();                tenMSecs = 0;                adapter.clear();                btnSWStart.setVisibility(View.VISIBLE);                btnSWPause.setVisibility(View.GONE);                btnSWReset.setVisibility(View.GONE);                btnSWRecord.setVisibility(View.GONE);                btnSWResume.setVisibility(View.GONE);            }        });        btnSWResume = (Button)findViewById(R.id.btnSWResume);        btnSWResume.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 开始                startTimer();                btnSWResume.setVisibility(View.GONE);                btnSWReset.setVisibility(View.GONE);                btnSWRecord.setVisibility(View.VISIBLE);                btnSWPause.setVisibility(View.VISIBLE);            }        });        btnSWStart = (Button)findViewById(R.id.btnSWStart);        btnSWStart.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 开始                startTimer();                btnSWStart.setVisibility(View.GONE);                btnSWPause.setVisibility(View.VISIBLE);                btnSWRecord.setVisibility(View.VISIBLE);            }        });        btnSWRecord.setVisibility(View.GONE);        btnSWPause.setVisibility(View.GONE);        btnSWReset.setVisibility(View.GONE);        btnSWResume.setVisibility(View.GONE);        // 将适配器添加到列表        lvWatchTimeList = (ListView)findViewById(R.id.lvWatchTimeList);        adapter = new ArrayAdapter<String>(getContext(),                android.R.layout.simple_list_item_1);        lvWatchTimeList.setAdapter(adapter);        // 向Handler发送消息        showTimeTask = new TimerTask() {            @Override            public void run() {                handler.sendEmptyMessage(MSG_WHAT_SHOW_TIME);            }        };        // 开始计时        timer.schedule(showTimeTask,200,200);    }    // 开始    private void startTimer(){        if(timerTask == null){            timerTask = new TimerTask() {                @Override                public void run() {                    tenMSecs++;                }            };            timer.schedule(timerTask,10,10);        }    }    // 结束    private void stopTimer(){        if(timerTask != null){            timerTask.cancel();            timerTask = null;        }    }    // 取消计时    public void onDestory(){        timer.cancel();    }    private Handler handler = new Handler(){        public void handleMessage(Message msg){            switch (msg.what){                // 如果消息匹配，则将相应时间计算后显示在相应TextView上                case MSG_WHAT_SHOW_TIME:                    tvHour.setText(tenMSecs/100/60/60+"");                    tvMinute.setText(tenMSecs/100/60%60+"");                    tvSecond.setText(tenMSecs/100%60+"");                    tvMSecond.setText(tenMSecs%100+"");                    break;                default:                    break;            }        };    };

结束

好吧，这次是真的结束了。

同样的，需要代码就直接评论留邮箱吧。代码会继续更新的，注释也会继续更新……

项目也上传到Github了，欢迎大家贡献代码啊——传送门。

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