Android在新線程中每秒寫入一個日誌

Question

我想從SeekBar中寫入值來登錄新線程。我想按下按鈕並開始寫入日誌。並更改seekBar值並將其寫入日誌中。

public class MainActivity extends AppCompatActivity implements SeekBar.OnSeekBarChangeListener, View.OnTouchListener { 

    private SeekBar seekBar; 
    private Button button; 
    private TextView textView; 
    private EditText editText; 
    private Thread thread; 
    private int value = 0; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     seekBar = (SeekBar) findViewById(R.id.seekBar); 
     button = (Button) findViewById(R.id.button); 
     textView = (TextView) findViewById(R.id.textView); 
     editText = (EditText) findViewById(R.id.editText); 
     seekBar.setOnSeekBarChangeListener(this); 
     button.setOnTouchListener(this); 
     print(); 
    } 

    @Override 
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
     value = progress; 
    } 

    @Override 
    public void onStartTrackingTouch(SeekBar seekBar) { 

    } 

    @Override 
    public void onStopTrackingTouch(SeekBar seekBar) { 

    } 

    @Override 
    public boolean onTouch(View v, MotionEvent event) { 
     switch (event.getAction()) { 
      case MotionEvent.ACTION_DOWN: 
       print(); 
       Toast.makeText(MainActivity.this, "ACTION_DOWN", Toast.LENGTH_SHORT).show(); 
       return true; // if you want to handle the touch event 
      case MotionEvent.ACTION_UP: 
       thread.stop(); 
       Toast.makeText(MainActivity.this, "ACTION_UP", Toast.LENGTH_SHORT).show(); 
       return true; // if you want to handle the touch event 
     } 
     return false; 
    } 

    public void print() { 
     Runnable runnable = new Runnable() { 
      @Override 
      public void run() { 
       Log.d("MyLog", String.valueOf(value)); 
      } 
     }; 
     thread = new Thread(runnable); 
     thread.start(); 
    } 
} 

但我的日誌寫入一次。我怎樣才能每秒鐘寫日誌？

Answer 1

你可以做這樣的事情：

Handler handler = new Handler(); 
boolean stop = false; 

Runnable runnable = new Runnable() { 
    @Override 
    public void run() { 
     Log.d("MyLog", String.valueOf(value)); 

     if (!stop) { 
      handler.postDelayed(this, 1000); 
     } 
    } 
}; 

// start logging by calling this method 
public void print() { 
    handler.post(runnable); 
} 

// stop logging by calling this method 
public void printStop() { 
    stop = true; 
}