安卓番茄钟app实现代码

以下是一个简单的安卓番茄钟App实现代码，使用了CountDownTimer类来实现倒计时：

public class MainActivity extends AppCompatActivity {

    private TextView timerTextView;
    private Button startButton;
    private Button resetButton;
    private CountDownTimer countDownTimer;

    private long timeLeftInMilliseconds = 1500000; // 25 minutes

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        timerTextView = findViewById(R.id.timerTextView);
        startButton = findViewById(R.id.startButton);
        resetButton = findViewById(R.id.resetButton);

        startButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startTimer();
            }
        });

        resetButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetTimer();
            }
        });

        updateTimer();
    }

    private void startTimer() {
        countDownTimer = new CountDownTimer(timeLeftInMilliseconds, 1000) {
            @Override
            public void onTick(long l) {
                timeLeftInMilliseconds = l;
                updateTimer();
            }

            @Override
            public void onFinish() {
                resetTimer();
                Toast.makeText(MainActivity.this, "Time's up!", Toast.LENGTH_SHORT).show();
            }
        }.start();

        startButton.setEnabled(false);
        resetButton.setEnabled(true);
    }

    private void resetTimer() {
        if (countDownTimer != null) {
            countDownTimer.cancel();
        }

        timeLeftInMilliseconds = 1500000;
        updateTimer();

        startButton.setEnabled(true);
        resetButton.setEnabled(false);
    }

    private void updateTimer() {
        int minutes = (int) timeLeftInMilliseconds / 60000;
        int seconds = (int) timeLeftInMilliseconds % 60000 / 1000;

        String timeLeftText;

        if (seconds < 10) {
            timeLeftText = minutes + ":0" + seconds;
        } else {
            timeLeftText = minutes + ":" + seconds;
        }

        timerTextView.setText(timeLeftText);
    }
}

需要注意的是，这只是一个简单的实现，实际上番茄钟App还包括了一些其他的功能和设置，比如暂停、调整时间长度、提醒等等。如果你想要开发一个完整的番茄钟App，需要进一步完善代码。