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);
}
};
}
1 楼 sunror 2010-09-10 test文件不能解压！ 2 楼 ableouou 2010-09-13 可能是因为公司加密了... 3 楼 ableouou 2010-09-13 我贴上代码吧
