Android整点报时语音时钟开发求助：代码每秒重复播报问题

你的代码会每秒重复播报的核心原因是：Runnable每秒执行一次，整点时段（比如1:00:00到1:00:59）的每一秒都满足Hour == X && Minute == 0的判断条件，导致每秒都触发播报。下面是修正后的代码，同时优化了冗余的判断逻辑：

public class MainActivity extends AppCompatActivity implements TextToSpeech.OnInitListener {
    private TextToSpeech tts;
    private TextView time_textView, hour_textView;
    // 记录上一次播报的小时，避免同一整点重复播报
    private int lastAnnouncedHour = -1;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tts = new TextToSpeech(this, this);
        time_textView = findViewById(R.id.time_textView);
        hour_textView = findViewById(R.id.hour_textView);
        
        final Handler handler = new Handler(Looper.getMainLooper());
        final Runnable runnable = new Runnable() {
            @Override
            public void run() {
                Calendar calendar = Calendar.getInstance();
                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("h:mm:ss", Locale.getDefault());
                String currentTime = simpleDateFormat.format(calendar.getTime());
                time_textView.setText(currentTime);
                
                int currentHour = calendar.get(Calendar.HOUR); // 12小时制，用HOUR_OF_DAY可切换为24小时制
                int currentMinute = calendar.get(Calendar.MINUTE);
                int currentSecond = calendar.get(Calendar.SECOND);
                
                // 仅在整点的第0秒触发播报，且确保同一小时只播报一次
                if (currentMinute == 0 && currentSecond == 0 && currentHour != lastAnnouncedHour) {
                    // 动态生成播报文本，替代冗余的else if判断
                    String announceText = String.format("The time is %d O'clock", currentHour);
                    tts.speak(announceText, TextToSpeech.QUEUE_FLUSH, null);
                    // 更新已播报的小时标记
                    lastAnnouncedHour = currentHour;
                }
                
                handler.postDelayed(this, 1000);
            }
        };
        handler.post(runnable);
    }
    
    @Override
    public void onInit(int status) {
        if (status == TextToSpeech.SUCCESS) {
            int result = tts.setLanguage(Locale.US);
            if (result == TextToSpeech.LANG_MISSING_DATA
                || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                Log.e("TTS", "Language not supported");
            }
        } else {
            Log.e("TTS", "Initialization Failed!");
        }
    }
    
    @Override
    public void onDestroy() {
        if (tts != null) {
            tts.stop();
            tts.shutdown();
        }
        super.onDestroy();
    }
}

关键修改说明： #

• 新增lastAnnouncedHour成员变量，标记已播报的小时，避免同一整点重复触发
• 收紧播报条件：只有当分钟、秒都为0且当前小时未播报过时，才执行语音播报
• 用动态字符串拼接替代大量else if，简化代码结构
• 修正了Calendar时间获取的写法，改用calendar.get()方法替代过时的getTime().getHours()

内容的提问来源于stack exchange，提问作者Michelle