Android实现秒表功能
作者:Flying_Master
这篇文章主要为大家详细介绍了Android实现简易秒表功能,具备启停功能,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Android实现秒表功能的具体代码,供大家参考,具体内容如下
设计完成一个秒表,具备启停功能,正确使用工作线程完成界面刷新
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" 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" android:gravity="center"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="秒表" android:textSize="30sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="@string/_00_00_00" android:textSize="30sp" android:id="@+id/clock" /> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="center"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="清零" android:id="@+id/init" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="计时" android:id="@+id/start" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止" android:id="@+id/stop" /> </LinearLayout> </LinearLayout>
AndroidManifest.xml
将activity,service在AndoidMainfest.xml中注册
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.ex_5"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainAActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".TimeService"> </service> </application> </manifest>
Timeservice.java
service服务
package com.example.ex_5; import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.util.Log; import androidx.annotation.Nullable; import java.util.Date; public class TimeService extends Service { @Nullable private Date startTime = new Date(); private long diff; public Thread workThread; private Runnable backGroundWork = new Runnable() { @Override public void run() { while(!Thread.interrupted()){ Date endTime = new Date(); diff = endTime.getTime()-startTime.getTime(); MainActivity.UpdateGUI(diff); Log.i("TimeService:The diff is",String.valueOf(diff)); try { Thread.sleep(0); } catch (InterruptedException e) { e.printStackTrace(); } } } }; @Override public void onCreate() { super.onCreate(); Log.i("TimeService","onCreate"); workThread=new Thread(null,backGroundWork,"workThread"); } @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); if(!workThread.isAlive()){ workThread.start(); } Log.i("TimeService","onStart"); } @Override public void onDestroy() { super.onDestroy(); MainActivity.UpdateGUI(0); MainActivity.UpdateDiff(diff); workThread.interrupt(); Log.i("TimeService","onDestroy"); } public IBinder onBind(Intent intent) { return null; } }
MainActivity.java
注册按钮响应事件,更新UI界面
package com.example.ex_5; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import java.net.ServerSocket; public class MainActivity extends AppCompatActivity { private static Handler handler = new Handler(); private static TextView labelView = null; private static String time; private static long _diff = 0; //更新界面 public static void UpdateGUI(long diff) { diff += _diff; int hours = (int) diff / (1000 * 60 * 60); int minutes = (int) (diff - (hours * (1000 * 60 * 60))) / (1000 * 60); int seconds = (int) (diff - (hours * (1000 * 60 * 60)) - (minutes * (1000 * 60))) / 1000; time = hours + ":" + minutes + ":" + seconds; handler.post(RefreshLable); } //供停止功能使用,用于记录服务结束之时的时间 public static void UpdateDiff(long diff){ _diff = diff; } //setText public static Runnable RefreshLable = new Runnable() { @Override public void run() { labelView.setText(time); } }; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button initButton = findViewById(R.id.init); final Button startButton = findViewById(R.id.start); Button stopButton = findViewById(R.id.stop); labelView = findViewById(R.id.clock); final Intent serviceIntent = new Intent(this, TimeService.class); startButton.setOnClickListener(new Button.OnClickListener() { public void onClick(View view) { Log.i("MainActivity","ClickStartButton"); startService(serviceIntent); } }); stopButton.setOnClickListener(new Button.OnClickListener(){ @Override public void onClick(View v) { Log.i("the behead diff is",String.valueOf(_diff)); Log.i("MainActivity","ClickStopButton"); stopService(serviceIntent); } }); initButton.setOnClickListener(new Button.OnClickListener(){ @Override public void onClick(View v) { Log.i("MainActivity","ClickInitButton"); _diff = 0; String text = "00:00:00"; labelView.setText(text); stopService(serviceIntent); } }); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。