Android自定義數字時鐘代碼

Android自定義數字時鐘代碼

import java.util.Calendar;

import android.content.Context;
import android.os.Handler;
import android.os.SystemClock;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.TextView;
public class DigitalClock extends TextView {
    private final static String TAG = "DigitalClock";

private Calendar mCalendar;
private String mFormat = "yyyy.M.d E";

private Runnable mTicker;
private Handler mHandler;

private boolean mTickerStopped = false;

public DigitalClock(Context context) {
    super(context);
    initClock(context);
}

public DigitalClock(Context context, AttributeSet attrs) {
    super(context, attrs);
    initClock(context);
}

private void initClock(Context context) {
    if (mCalendar == null) {
        mCalendar = Calendar.getInstance();
    }
}

@Override
protected void onAttachedToWindow() {
    mTickerStopped = false;
    super.onAttachedToWindow();
    mHandler = new Handler();

    mTicker = new Runnable() {
        public void run() {
            if (mTickerStopped)
                return;
            mCalendar.setTimeInMillis(System.currentTimeMillis());
            // setText(mSimpleDateFormat.format(mCalendar.getTime()));
            setText(DateFormat.format(mFormat, mCalendar));
            invalidate();
            long now = SystemClock.uptimeMillis();
            // long next = now + (1000 - now % 1000);
            long next = now + (1000 - System.currentTimeMillis() % 1000);

            // Debug
            Log.d(TAG, "" + now);
            Log.d(TAG, "" + next);
            Log.d(TAG, "" + mCalendar.getTimeInMillis());

            // TODO
            mHandler.postAtTime(mTicker, next);
        }
    };
    mTicker.run();
}

@Override
protected void onDetachedFromWindow() {
    super.onDetachedFromWindow();
    mTickerStopped = true;
}

public void setFormat(String format) {
    mFormat = format;
}


}</pre>