我正在尝试制作一个番茄计时器(工作 25 分钟,休息 5 分钟,然后重复 n 次)。但我找不到一种方法让休息计时器自动启动,然后用工作计时器再次启动(工作计时器 = 00:10 - 休息计时器 = 00:03,我输入这些值以便可以更快地测试)。我该如何解决这个问题?
public class MainActivity extends AppCompatActivity {
TextView tvTimer, tvSessions;
ImageView ivStart, ivStop;
SeekBar seekBar;
CountDownTimer countDownTimer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvTimer = findViewById(R.id.tvTimer);
tvSessions = findViewById(R.id.tvSessions);
ivStart = findViewById(R.id.ivStart);
ivStop = findViewById(R.id.ivStop);
seekBar = findViewById(R.id.seekBar);
seekBar.setMax(2500);
seekBar.setProgress(10);
seekBar.setVisibility(View.GONE);
tvTimer.setText("00:10");
}
// ON CLICK METHODS
public void startTimer(View v){
countDownTimer = new CountDownTimer(seekBar.getProgress() * 1000 + 100, 1000) {
@Override
public void onTick(long millisUntilFinished) {
updateTimer((int) millisUntilFinished / 1000);
}
@Override
public void onFinish() {
breakTimer();
}
};
countDownTimer.start();
}
public void stopTimer(View v){
}
// UPDATE METHODS
private void breakTimer(){
seekBar.setProgress(3);
tvTimer.setText("00:03");
}
private void updateTimer(int progress){
int minutes = progress / 60;
int seconds = progress - minutes * 60;
String textMinutes = String.valueOf(minutes);
String textSeconds = String.valueOf(seconds);
if(seconds < 10) textSeconds = "0" + textSeconds;
if(minutes < 10) textMinutes = "0" + textMinutes;
tvTimer.setText(textMinutes + ":" + textSeconds);
}
}
预期输出:
00:10 -> 00:00 -> 00:03 -> 00:00 -> 00:10 and so on...
最佳答案
像这样的事情怎么样?使用标志来跟踪计时器是休息计时器还是番茄计时器。
当计时器结束时,您检查标志来决定接下来启动哪个计时器(并翻转标志,以便下次执行相反的操作)。
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.util.concurrent.TimeUnit;
public class MainActivity extends AppCompatActivity {
private static final int TICK_EVERY_SECOND = 1000;
private TextView tvTimer, tvSessions;
private ImageView ivStart, ivStop;
private SeekBar seekBar;
private CountDownTimer countDownTimer;
private boolean isRest = false;
private int userSelectedDurationSeconds = -1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvTimer = findViewById(R.id.tvTimer);
tvSessions = findViewById(R.id.tvSessions);
ivStart = findViewById(R.id.ivStart);
ivStop = findViewById(R.id.ivStop);
seekBar = findViewById(R.id.seekBar);
seekBar.setMax(2500);
seekBar.setProgress(10);
seekBar.setVisibility(View.GONE);
tvTimer.setText("00:10");
}
// ON CLICK METHODS
public void startTimer(View v) {
isRest = false;
int durationSeconds = seekBar.getProgress();
userSelectedDurationSeconds = durationSeconds;
restartTimer(durationSeconds);
}
private void restartTimer(int durationSeconds) {
countDownTimer = new CountDownTimer(TimeUnit.SECONDS.toMillis(durationSeconds), TICK_EVERY_SECOND) {
@Override
public void onTick(long millisUntilFinished) {
updateTimer((int) millisUntilFinished / 1000);
}
@Override
public void onFinish() {
breakTimer();
}
};
countDownTimer.start();
}
public void stopTimer(View v) {
}
// UPDATE METHODS
private void breakTimer() {
isRest = !isRest;
if(isRest) {
seekBar.setProgress(3);
tvTimer.setText("00:03");
restartTimer(3);
} else {
restartTimer(userSelectedDurationSeconds);
}
}
private void updateTimer(int progressInSeconds) {
int minutes = progressInSeconds / 60;
int seconds = progressInSeconds - minutes * 60;
String textMinutes = String.valueOf(minutes);
String textSeconds = String.valueOf(seconds);
if (seconds < 10) textSeconds = "0" + textSeconds;
if (minutes < 10) textMinutes = "0" + textMinutes;
tvTimer.setText(textMinutes + ":" + textSeconds);
}
}
关于java - 计时器的倒数计时器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59951550/