Android 秒表

2012年10月28日，手机没有秒表，自己想做一个秒表来给自己用，现在马上做出一个实例来，这只是开始，以后做个界面漂亮的应用出来。废话不说，先上图：

            

 

源码：

建立项目：Stopwatch

代码清单：org/wwj/Stopwatch/Stopwatch.java

package org.wwj.Stopwatch;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class Stopwatch extends Activity {private TextView minText;//分private TextView secText;//秒private Button start;//开始按钮private Button stop;//停止按钮private boolean isPaused = false;private String timeUsed;private int timeUsedInsec;private Handler uiHandle = new Handler(){public void handleMessage(android.os.Message msg) {switch(msg.what){case 1:if(!isPaused) {addTimeUsed();updateClockUI();}uiHandle.sendEmptyMessageDelayed(1, 1000);break;default: break;}}};@Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_stopwatch);                //获取界面的控件        minText = (TextView) findViewById(R.id.min);        secText = (TextView) findViewById(R.id.sec);        start = (Button) findViewById(R.id.start);        stop = (Button) findViewById(R.id.stop);                        //为按钮Start注册监听器        start.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubuiHandle.removeMessages(1);startTime();isPaused = false;}});                //为按钮stop注册监听器        stop.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubisPaused = true;timeUsedInsec = 0;}});    }               @Override    protected void onPause() {    // TODO Auto-generated method stub    super.onPause();    isPaused = true;    }            @Override    protected void onResume() {    // TODO Auto-generated method stub    super.onResume();    isPaused = false;    }        private void startTime(){    uiHandle.sendEmptyMessageDelayed(1, 1000);    }        /**     * 更新时间的显示     */    private void updateClockUI(){    minText.setText(getMin() + ":");    secText.setText(getSec());    }        public void addTimeUsed(){    timeUsedInsec = timeUsedInsec + 1;    timeUsed = this.getMin() + ":" + this.getSec();    }        public CharSequence getMin(){    return String.valueOf(timeUsedInsec / 60);    }        public CharSequence getSec(){    int sec = timeUsedInsec % 60;    return sec < 10? "0" + sec :String.valueOf(sec);    }        @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.activity_stopwatch, menu);        return true;    }    }

 

界面布局：res/layout/layout_stopwatch.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/LinearLayout1"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" ><LinearLayout     android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center_horizontal">    <TextView         android:id="@+id/min"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="40sp"/>    <TextView         android:id="@+id/sec"        android:layout_width="wrap_content"         android:layout_height="wrap_content"        android:textSize="40sp"        android:textColor="#ff0000"/></LinearLayout><LinearLayout     android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center_horizontal"    >    <Button         android:id="@+id/start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/start"/>    <Button         android:id="@+id/stop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/stop"/></LinearLayout></LinearLayout>