倒计时器代码
package com.util;
Java代码
import android.os.Handler;
import android.os.Message;
//在android自带的CountdownTimer类基础上实现定时功能
public abstract class AdvancedCountdownTimer {
private static final int MSG_RUN = 1;
private final long mCountdownInterval;// 定时间隔，以毫秒计
private long mTotalTime;// 定时时间
private long mRemainTime;// 剩余时间
// 构造函数
public AdvancedCountdownTimer(long millisInFuture, long countDownInterval) {
mTotalTime = millisInFuture;
mCountdownInterval = countDownInterval;
mRemainTime = millisInFuture;
}
// 取消计时
public final void cancel() {
mHandler.removeMessages(MSG_RUN);
}
// 重新开始计时
public final void resume() {
mHandler.sendMessageAtFrontOfQueue(mHandler.obtainMessage(MSG_RUN));
}
// 暂停计时
public final void pause() {
mHandler.removeMessages(MSG_RUN);
}
// 开始计时
public synchronized final AdvancedCountdownTimer start() {
if (mRemainTime <= 0) {// 计时结束后返回
onFinish();
return this;
}
// 设置计时间隔
mHandler.sendMessageDelayed(mHandler.obtainMessage(MSG_RUN),
mCountdownInterval);
return this;
}
public abstract void onTick(long millisUntilFinished, int percent);// 计时中
public abstract void onFinish();// 计时结束
// 通过handler更新android UI，显示定时时间
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
synchronized (AdvancedCountdownTimer.this) {
if (msg.what == MSG_RUN) {
mRemainTime = mRemainTime - mCountdownInterval;
if (mRemainTime <= 0) {
onFinish();
} else if (mRemainTime < mCountdownInterval) {
sendMessageDelayed(obtainMessage(MSG_RUN), mRemainTime);
} else {
onTick(mRemainTime, new Long(100
* (mTotalTime - mRemainTime) / mTotalTime)
.intValue());
sendMessageDelayed(obtainMessage(MSG_RUN),
mCountdownInterval);
}
}
}
}
};
}
import android.os.Handler;
import android.os.Message;
//在android自带的CountdownTimer类基础上实现定时功能
public abstract class AdvancedCountdownTimer {
private static final int MSG_RUN = 1;
private final long mCountdownInterval;// 定时间隔，以毫秒计
private long mTotalTime;// 定时时间
private long mRemainTime;// 剩余时间
// 构造函数
public AdvancedCountdownTimer(long millisInFuture, long countDownInterval) {
mTotalTime = millisInFuture;
mCountdownInterval = countDownInterval;
mRemainTime = millisInFuture;
}
// 取消计时
public final void cancel() {
mHandler.removeMessages(MSG_RUN);
}
// 重新开始计时
public final void resume() {
mHandler.sendMessageAtFrontOfQueue(mHandler.obtainMessage(MSG_RUN));
}
// 暂停计时
public final void pause() {
mHandler.removeMessages(MSG_RUN);
}
// 开始计时
public synchronized final AdvancedCountdownTimer s
tart() {
if (mRemainTime <= 0) {// 计时结束后返回
on
Finish();
return this;
}
// 设置计时间隔
mHandler.sendMessageDelayed(mHandler.obtainMessage(MSG_RUN),
mCountdownInterval);
return this;
}
public abstract void onTick(long millisUntilFinished, int percent);// 计时中
public abstract void onFinish();// 计时结束
// 通过handler更新android UI，显示定时时间
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
synchronized (AdvancedCountdownTimer.this) {
if (msg.what == MSG_RUN) {
mRemainTime = mRemainTime - mCountdownInterval;
if (mRemainTime <= 0) {
onFinish();
} else if (mRemainTime < mCountdownInterval) {
sendMessageDelayed(obtainMessage(MSG_RUN), mRemainTime);
} else {
onTick(mRemainTime, new Long(100
* (mTotalTime - mRemainTime) / mTotalTime)
.intValue());
sendMessageDelayed(obtainMessage(MSG_RUN),
mCountdownInterval);
}
}
}
}
};
}
这是一个抽象工具类，在主程序中编写一个类继承它就可以实现相应的计时功能。
Java代码
package com.timer;
import java.io.IOException;
import com.util.AdvancedCountdownTimer;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Button;
import android.widget.Toast;
public class Timer extends Activity implements OnClickListener {
private TextView txt_time = null;//显示剩余时间
private EditText edt_hour = null;//定时时间编辑框
private EditText edt_minute = null;
private EditText edt_second = null;
private Button btn_start = null;//各个按钮
private Button btn_pause = null;
private Button btn_con = null;
private Button btn_reset = null;
private Button btn_exit = null;
private long hour = 0;//时间变量
private long minute = 0;
private long second = 0;
private long time = 0;
private MyCount count = null;//定时类对象
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(https://www.360docs.net/doc/f216851198.html,yout.main);
findViews();
setListener();
}
//识别各个控件并设置按钮状态
private void findViews() {
txt_time = (TextView) findViewById(R.id.text);
edt_hour = (EditText) findViewById(R.id.hour);
edt_minute = (EditText) findViewById(R.id.minute);
edt_second = (EditText) findViewById(R.id.second);
btn_start = (Button) findViewById(R.id.start);
btn_pause = (Button) findViewById(R.id.pause);
btn_con = (Button) findViewById(R.id.con);
btn_reset = (Button) findViewById(R.id.reset);
bt
n_exit = (Button) findViewById(R.id.exit);
btn_pause.setEnabled(false);
btn_con.setEnabled(false);
}
//绑定****
**
private void setListener() {
btn_start.setOnClickListener(this);
btn_pause.setOnClickListener(this);
btn_con.setOnClickListener(this);
btn_reset.setOnClickListener(this);
btn_exit.setOnClickListener(this);
}
//获取设置的时间并判断输入是否为空
private boolean setTime() {
String strHour = edt_hour.getText().toString();//取控件的值
String strMinute = edt_minute.getText().toString();
String strSecond = edt_second.getText().toString();
if (strHour.equals("") || strMinute.equals("") || strSecond.equals("")) {
return false;
} else {
hour = Long.parseLong(strHour);
minute = Long.parseLong(strMinute);
second = Long.parseLong(strSecond);
time = (hour * 3600 + minute * 60 + second) * 1000;
count = new MyCount(time, 1000);
return true;
}
}
//设置******
@Override
public void onClick(View v) {
switch (v.getId()) {
//点击开始计时按钮
case R.id.start:
if (setTime() == false) {
Toast.makeText(Timer.this, "请输入完整定时时间", Toast.LENGTH_LONG)
.show();
} else {
count.start();//开始计时
btn_start.setEnabled(false);
btn_pause.setEnabled(true);
}
break;
//点击暂停按钮
case R.id.pause:
count.pause();//暂停
btn_pause.setEnabled(false);
btn_con.setEnabled(true);
break;
//点击继续按钮
case R.id.con:
count.resume();//继续
btn_pause.setEnabled(true);
btn_con.setEnabled(false);
break;
//点击重置按钮
case R.id.reset:
count.cancel();//取消及时，重置界面状态
txt_time.setText("");
edt_hour.setText("0");
edt_hour.setText("0");
edt_second.setText("30");
btn_pause.setEnabled(false);
btn_con.setEnabled(false);
btn_start.setEnabled(true);
break;
//点击退出按钮
case R.id.exit:
android.os.Process.killProcess(android.os.Process.myPid());//退出
break;
default:
break;
}
}
//实现计时功能的类
class MyCount extends AdvancedCountdownTimer {
public MyCount(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
@Override
public void onFinish() {
//媒体对象
final MediaPlayer media = MediaPlayer.create(Timer.this, R.raw.alarm);
//对话框对象
final AlertDialog mydialog = new AlertDialog.Builder(Timer.this).setMessage(
"时间到！").setPositiveButton("确定", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
media.stop();
media.release();
btn_pause.setEnabled(false);
btn_con.setEnabled(false);
btn_start.setEnabled(true);
}
}).create();
mydialog.show();//播放结束后显示对话框
txt_time.setText("");
try {
media.p
repare(); //准备播放音乐
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
media.start();//播放音乐
media.setOnCompletionListener(new OnCompletionListener() {//播放结束后会话框消失，重置按钮
状态
@Override
public void onCompletion(MediaPlayer mp) {
mydialog.hide();
btn_pause.setEnabled(false);
btn_con.setEnabled(false);
btn_start.setEnabled(true);
}
});
}
//更新剩余时间
@Override
public void onTick(long millisUntilFinished, int percent) {
long myhour = (millisUntilFinished / 1000) / 3600;
long myminute = ((millisUntilFinished / 1000) - myhour * 3600) / 60;
long mysecond = millisUntilFinished / 1000 - myhour * 3600
- myminute * 60;
txt_time.setText("剩余时间" + myhour + ":" + myminute + ":" + mysecond);
}
}
}
本文来自:Java问问(https://www.360docs.net/doc/f216851198.html,) 详细出处参考：https://www.360docs.net/doc/f216851198.html,/mobile/android/2011/0406/5961.html