android 時鐘 卡頓-android模擬時鐘 秒針卡頓（有時候秒針會不走，然後下一秒會跳動三個格子）

android模擬時鐘 秒針卡頓（有時候秒針會不走，然後下一秒會跳動三個格子）

 package custom.analog.clock;

import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.CountDownTimer;
import android.os.Handler;
import android.text.format.Time;
import android.util.AttributeSet;
import android.view.View;
import java.util.TimeZone;

public class AnalogClock extends View {
    public AnalogClock(Context context) {
        super(context);
    }

    private Time mCalendar;
    private Drawable mHourHand;
    private Drawable mMinuteHand;
    private Drawable mSecondHand;
    private Drawable mDial;
    private int mDialWidth;
    private int mDialHeight;
    private boolean mAttached;
    private final Handler mHandler = new Handler();
    private float mMinutes;
    private float mHour;
    private boolean mChanged;
    Context mContext;

    public AnalogClock(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public AnalogClock(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        Resources r = context.getResources();
        mContext = context;
        mDial = r.getDrawable(R.drawable.clock_dial);
        mHourHand = r.getDrawable(R.drawable.clock_hour);
        mMinuteHand = r.getDrawable(R.drawable.clock_minute);
        mSecondHand = r.getDrawable(R.drawable.clockgoog_minute);

        mCalendar = new Time();

        mDialWidth = mDial.getIntrinsicWidth();
        mDialHeight = mDial.getIntrinsicHeight();
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

        if (!mAttached) {
            mAttached = true;
            IntentFilter filter = new IntentFilter();

            filter.addAction(Intent.ACTION_TIME_TICK);
            filter.addAction(Intent.ACTION_TIME_CHANGED);
            filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);

            getContext().registerReceiver(mIntentReceiver, filter, null,
                    mHandler);
        }

        mCalendar = new Time();

        onTimeChanged();
        counter.start();
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        if (mAttached) {
            counter.cancel();
            getContext().unregisterReceiver(mIntentReceiver);
            mAttached = false;
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);

        float hScale = 1.0f;
        float vScale = 1.0f;

        if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
            hScale = (float) widthSize / (float) mDialWidth;
        }

        if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
            vScale = (float) heightSize / (float) mDialHeight;
        }

        float scale = Math.min(hScale, vScale);

        setMeasuredDimension(
                resolveSize((int) (mDialWidth * scale), widthMeasureSpec),
                resolveSize((int) (mDialHeight * scale), heightMeasureSpec));
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mChanged = true;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        boolean changed = mChanged;
        if (changed) {
            mChanged = false;
        }
        boolean seconds = mSeconds;
        if (seconds) {
            mSeconds = false;
        }
        int availableWidth = 200;
        int availableHeight = 200;

        int x = availableWidth / 2;
        int y = availableHeight / 2;

        final Drawable dial = mDial;
        int w = dial.getIntrinsicWidth();
        int h = dial.getIntrinsicHeight();

        boolean scaled = false;

        if (availableWidth < w || availableHeight < h) {
            scaled = true;
            float scale = Math.min((float) availableWidth / (float) w,
                    (float) availableHeight / (float) h);
            canvas.save();
            canvas.scale(scale, scale, x, y);
        }

        if (changed) {
            dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
        }
        dial.draw(canvas);

        canvas.save();
        canvas.rotate(mHour / 12.0f * 360.0f, x, y);
        final Drawable hourHand = mHourHand;
        if (changed) {
            w = hourHand.getIntrinsicWidth();
            h = hourHand.getIntrinsicHeight();
            hourHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y
                    + (h / 2));
        }
        hourHand.draw(canvas);
        canvas.restore();

        canvas.save();
        canvas.rotate(mMinutes / 60.0f * 360.0f, x, y);

        final Drawable minuteHand = mMinuteHand;
        if (changed) {
            w = minuteHand.getIntrinsicWidth();
            h = minuteHand.getIntrinsicHeight();
            minuteHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y
                    + (h / 2));
        }
        minuteHand.draw(canvas);
        canvas.restore();
        canvas.save();
        canvas.rotate(mSecond, x, y);

        if (seconds) {
            w = mSecondHand.getIntrinsicWidth();
            h = mSecondHand.getIntrinsicHeight();
            mSecondHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y
                    + (h / 2));
        }
        mSecondHand.draw(canvas);
/*********************************************/     
        canvas.restore();
        if (scaled) {
            canvas.restore();
        }
    }

    MyCount counter = new MyCount(10000, 1000);

    public class MyCount extends CountDownTimer {
        public MyCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onFinish() {
            counter.start();
        }

        @Override
        public void onTick(long millisUntilFinished) {
            mCalendar.setToNow();

            int second = mCalendar.second;

            mSecond = 6.0f * second;
            mSeconds = true;

            AnalogClock.this.invalidate();

        }
    }

    boolean mSeconds = false;
    float mSecond = 0;

    private void onTimeChanged() {
        mCalendar.setToNow();

        int hour = mCalendar.hour;
        int minute = mCalendar.minute;
        int second = mCalendar.second;

        mMinutes = minute + second / 60.0f;
        mHour = hour + mMinutes / 60.0f;
        mChanged = true;
    }

    private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
                String tz = intent.getStringExtra("time-zone");
                mCalendar = new Time(TimeZone.getTimeZone(tz).getID());
            }
            onTimeChanged();
            invalidate();
        }
    };
}

最佳回答：

先打印日志logcat看看
public void onTick(long millisUntilFinished) {
中不是按秒執行了.
確定一下是界面刷新卡頓還是後台執行卡頓。