Android Studio - 每秒被重複調用的方法（五十四）

Android Studio - 每秒被重複調用的方法（五十四）：

由於經常會使用 Timer 來做事情，所以將每秒被重複調用的方法記錄下來，方便將來使用。

Handler Count Down 每秒調用的程式

• 操作系統：Windows 7 64-bit 版本
• 開發環境：Android Studio 4.0.1 版本
• 原程式：C:\Development\Development_Android\Android_Project\DIY-Android-009-18 Handler 1sTimer
• 程式：C:\Development\Development_Android\Android_Project\ DIY-Android-009-18 Handler 1sTimer

Thread 線程每秒被重複調用範例：

new Thread(new Runnable() {             @Override             public void run() {                 while (true) {                     // write code                     System.out.println(duration);                     duration--;                     try { Thread.sleep(1000);                     } catch (InterruptedException e) {                         e.printStackTrace();                     }                 }             }         }).start();

Timer，TimerTask 每秒被重複調用一次範例：

Timer timer = new Timer();         TimerTask t = new TimerTask() {             @Override             public void run() {                 System.out.println(duration);                 duration--;             }         };         timer.scheduleAtFixedRate(t,1000,1000);

Count Down Timer 每秒被重複調用一次範例：

new CountDownTimer(10000, 1000) {             public void onTick(long millisUntilFinished) {                 // write code                 mtv_text.setText("Seconds remaining: " + millisUntilFinished / 1000);             }               public void onFinish() {                 mtv_text.setText("Counter Down Finished");             }         }.start();

Handler 每秒被重複調用一次範例：

public class MainActivity extends AppCompatActivity {       private TextView mtv_text;     private Handler countDownTimer;     private Runnable runnable;     private int duration = 10;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         mtv_text = (TextView) findViewById(R.id.tv_text);           countDownTimer = new Handler(Looper.getMainLooper());         runnable=new Runnable() {             @Override             public void run() {                 mtv_text.setText("Count Down Timer Per Second \n" + duration +" second");                 duration--;                 countDownTimer.postDelayed(this,1000);             }         };           countDownTimer.post(runnable);     }   }

2022年 2月 28日（Mon）天氣報告

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