Android Studio CountDownTimer

Question

我想爲我的應用程序實現一個倒計時小部件。在編寫代碼時，我需要幫助，使它以一個按鈕開始，並在時間到了時自動停止，然後顯示文本「完成」。任何幫助是極大的讚賞 ！先謝謝你 ！

我實際上已經嘗試了一些代碼示例。 Gradle能夠成功運行，沒有任何問題。但是，當我點擊開始按鈕時，沒有任何反應。下面是我使用的代碼：

public class countdown extends AppCompatActivity { 

Button buttonStart; 
TextView textCounter; 

MyCountDownTimer myCountDownTimer; 

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

    buttonStart = (Button)findViewById(R.id.start); 
    textCounter = (TextView)findViewById(R.id.counter); 

    buttonStart.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      myCountDownTimer = new MyCountDownTimer(30000, 1000); 
      myCountDownTimer.start(); 
     } 
    }); 

} 
public class MyCountDownTimer extends CountDownTimer { 

    public MyCountDownTimer(long millisInFuture, long countDownInterval) { 
     super(millisInFuture, countDownInterval); 
    } 

    @Override 
    public void onTick(long millisUntilFinished) { 
     textCounter.setText("seconds remaining: " + millisUntilFinished/1000); 

    } 

    @Override 
    public void onFinish() { 
     textCounter.setText("Finished!"); 
    } 


}} 

Answer 1

將這個代碼在你點擊按鈕聽衆：

new CountDownTimer(30000, 1000) {//CountDownTimer(edittext1.getText()+edittext2.getText()) also parse it to long 

public void onTick(long millisUntilFinished) { 
    mTextField.setText("seconds remaining: " + millisUntilFinished/1000); 
    //here you can have your logic to set text to edittext 
} 

public void onFinish() { 
    mTextField.setText("finished!"); 
} 
} 
.start(); 

請參閱本link。