自定义控件（选择模拟时钟进行重写）

主要是为了学习自定义控件，如何添加属性以及修改方法等等。
为模拟时钟添加了秒针走动。
效果如附件。
package com.able.widget;


import java.util.TimeZone;

import com.able.test.R;


import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.text.format.Time;
import android.util.AttributeSet;

import android.view.View;


public class AbleAnalogClock extends View
{
private Time mCalendar;

    private Drawable mHourHand;//时针
    private Drawable mMinuteHand;//分针
    private Drawable mDial;//表盘
    private Drawable mSecondHand;//秒针
   
    private int mDialWidth;//表盘宽度
    private int mDialHeight;//表盘高度

    private boolean mAttached;

    private final Handler mHandler = new Handler();
    private float mMinutes;
    private float mHour;
    private float mSecond;
    private boolean mChanged;
private final int UPDATEBYMIN=111;
public AbleAnalogClock(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public AbleAnalogClock(Context context, AttributeSet attrs) {
super(context, attrs);
try
{
Resources r=context.getResources();//
TypedArray a=context.obtainStyledAttributes(attrs,R.styleable.AbleAnalogClock);
this.mSecondHand=a.getDrawable(R.styleable.AbleAnalogClock_second);//属性栏的值
if(mSecondHand==null)
{
mSecondHand=r.getDrawable(R.drawable.clock_hand_second);//无用户输入时的默认值
}


mDial = a.getDrawable(R.styleable.AbleAnalogClock_face);
        if (mDial == null) {
            mDial = r.getDrawable(R.drawable.clock_dial);
        }

        mHourHand = a.getDrawable(R.styleable.AbleAnalogClock_hour);
        if (mHourHand == null) {
            mHourHand = r.getDrawable(R.drawable.clock_hand_hour);
        }

        mMinuteHand = a.getDrawable(R.styleable.AbleAnalogClock_minute);
        if (mMinuteHand == null) {
            mMinuteHand = r.getDrawable(R.drawable.clock_hand_minute);
        }

        mCalendar = new Time();

        mDialWidth = mDial.getIntrinsicWidth();
        mDialHeight = mDial.getIntrinsicHeight();
a.recycle();
}
catch(Exception e)
{
e.printStackTrace();
}
handler.sendEmptyMessage(UPDATEBYMIN);
}
public AbleAnalogClock(Context context) {
this(context,null);
// TODO Auto-generated constructor stub
}
@Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

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

            filter.addAction(Intent.ACTION_TIME_TICK);//send every min
            filter.addAction(Intent.ACTION_TIME_CHANGED);
            filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
           
            getContext().registerReceiver(mIntentReceiver, filter, null, mHandler);
        }

        // NOTE: It's safe to do these after registering the receiver since the receiver always runs
        // in the main thread, therefore the receiver can't run before this method returns.

        // The time zone may have changed while the receiver wasn't registered, so update the Time
        mCalendar = new Time();

        // Make sure we update to the current time
        onTimeChanged();
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        if (mAttached) {
            getContext().unregisterReceiver(mIntentReceiver);
            mAttached = false;
            handler.removeMessages(UPDATEBYMIN);
        }
    }

   
   
    @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;
        }
       
        int availableWidth =  mDial.getIntrinsicWidth();
        int availableHeight = mDial.getIntrinsicHeight();
       
       
        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*6.0f, x, y);
       
        final Drawable secondHand = mSecondHand;
        if (changed) {
            w = secondHand.getIntrinsicWidth();
            h = secondHand.getIntrinsicHeight();
            secondHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
        }
        secondHand.draw(canvas);
        canvas.restore();
       
       
        if (scaled) {
            canvas.restore();
        }
    }

    private Context getApplicationContext() {

return null;
}
private void onTimeChanged() {
        mCalendar.setToNow();

        int hour = mCalendar.hour;
        int minute = mCalendar.minute;
        int second = mCalendar.second;
        mSecond=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();
          
        }
    };
    Handler handler=new Handler()
    {

@Override
public void handleMessage(Message msg) {

switch(msg.what)
{
case UPDATEBYMIN:
onTimeChanged();            
            invalidate();

            sendEmptyMessageDelayed(UPDATEBYMIN,1000);
break;

}
super.handleMessage(msg);
}
   
    };

}

评论

3 楼 ableouou 2010-09-13  

我贴上代码吧

2 楼 ableouou 2010-09-13  

可能是因为公司加密了...

1 楼 sunror 2010-09-10  

test文件不能解压！