Android倒计时功能的实现

Android中的倒计时的功能（也能够直接使用CountDownTimer这个类直接实现，相关此Demo可查看我的博客）。參考了网上写的非常好的一个倒计时Demo：



以下提供下代码，和大家一起分享一下：

MainActivity：

package com.example.mytime;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

Button startButton;
EditText minuteText;
EditText secondText;
int minute;
int second;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);

startButton = (Button) findViewById(R.id.button_start);
minuteText = (EditText)findViewById(R.id.minute);
secondText = (EditText)findViewById(R.id.second);

startButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
if (!minuteText.getText().toString().equals("")) {
minute = Integer.parseInt(minuteText.getText().toString());
}
if (!secondText.getText().toString().equals("")) {
second = Integer.parseInt(secondText.getText().toString());
}
if (minute != 0 || second != 0) {

ArrayList<Integer> list = new ArrayList<Integer>();
list.add(minute);
list.add(second);

Intent intent = new Intent();
intent.setAction("com.example.mytime.StartActivity");

intent.putIntegerArrayListExtra("times", list);
startActivity(intent);
}
}
});
}

@Override
protected void onResume() {
minute = 0;
second = 0;
super.onResume();
}
}

详细倒计时相关类StartActivity：

package com.example.mytime;

import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
import android.widget.TextView;

public class StartActivity extends Activity{

static int minute = -1;
static int second = -1;
final static String tag = "tag";
TextView timeView;
Timer timer;
TimerTask  timerTask;
Handler handler = new Handler(){
public void handleMessage(Message msg) {
System.out.println("handle!");
if (minute == 0) {
if (second == 0) {
timeView.setText("Time out !");
if (timer != null) {
timer.cancel();
timer = null;
}
if (timerTask != null) {
timerTask = null;
}
}else {
second--;
String minutes = String.valueOf(minute);
String minute = minutes;
minute = "";
if (second >= 10) {
minutes = String.valueOf(minute);
minute = minutes;
minute = "";
timeView.setText(minute + second);/*"0"+minute + ":" + */
}else {
timeView.setText(minute + "0" + second);/*"0"+minute + ":0" + */
}
}
}else {
if (second == 0) {
second =59;
minute--;
if (minute >= 10) {
timeView.setText(minute + ":" + second);
}else {
timeView.setText("0"+minute + ":" + second);
}
}else {
second--;
if (second >= 10) {
if (minute >= 10) {
timeView.setText(minute + ":" + second);
}else {
timeView.setText("0"+minute + ":" + second);
}
}else {
if (minute >= 10) {
timeView.setText(minute + ":0" + second);
}else {
timeView.setText("0"+minute + ":0" + second);
}
}
}
}
};
};

@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.start);
timeView = (TextView)findViewById(R.id.myTime);

if (minute == -1 && second == -1) {
Intent intent = getIntent();
ArrayList<Integer> times = intent.getIntegerArrayListExtra("times");
minute = times.get(0);
second = times.get(1);
}

timeView.setText(minute + ":" + second);

timerTask = new TimerTask() {

@Override
public void run() {
Message msg = new Message();
msg.what = 0;
handler.sendMessage(msg);
}
};

timer = new Timer();
timer.schedule(timerTask,0,1000);

}

@Override
protected void onDestroy() {
if (timer != null) {
timer.cancel();
timer = null;
}
if (timerTask != null) {
timerTask = null;
}
minute = -1;
second = -1;
super.onDestroy();
}
}