AnalogClockpublic class AnalogClock extends android.view.View | This widget display an analogic clock with two hands for hours and
minutes. |
| Fields Summary |
|---|
| private android.text.format.Time | mCalendar | | private android.graphics.drawable.Drawable | mHourHand | | private android.graphics.drawable.Drawable | mMinuteHand | | private android.graphics.drawable.Drawable | mDial | | private int | mDialWidth | | private int | mDialHeight | | private boolean | mAttached | | private final android.os.Handler | mHandler | | private float | mMinutes | | private float | mHour | | private boolean | mChanged | | private final android.content.BroadcastReceiver | mIntentReceiver |
| Constructors Summary |
|---|
public AnalogClock(android.content.Context context)
this(context, null);
| public AnalogClock(android.content.Context context, android.util.AttributeSet attrs)
this(context, attrs, 0);
| public AnalogClock(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr)
this(context, attrs, defStyleAttr, 0);
| public AnalogClock(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr, int defStyleRes)
super(context, attrs, defStyleAttr, defStyleRes);
final Resources r = context.getResources();
final TypedArray a = context.obtainStyledAttributes(
attrs, com.android.internal.R.styleable.AnalogClock, defStyleAttr, defStyleRes);
mDial = a.getDrawable(com.android.internal.R.styleable.AnalogClock_dial);
if (mDial == null) {
mDial = context.getDrawable(com.android.internal.R.drawable.clock_dial);
}
mHourHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_hour);
if (mHourHand == null) {
mHourHand = context.getDrawable(com.android.internal.R.drawable.clock_hand_hour);
}
mMinuteHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_minute);
if (mMinuteHand == null) {
mMinuteHand = context.getDrawable(com.android.internal.R.drawable.clock_hand_minute);
}
mCalendar = new Time();
mDialWidth = mDial.getIntrinsicWidth();
mDialHeight = mDial.getIntrinsicHeight();
|
| Methods Summary |
|---|
| 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);
// OK, this is gross but needed. This class is supported by the
// remote views machanism and as a part of that the remote views
// can be inflated by a context for another user without the app
// having interact users permission - just for loading resources.
// For exmaple, when adding widgets from a user profile to the
// home screen. Therefore, we register the receiver as the current
// user not the one the context is for.
getContext().registerReceiverAsUser(mIntentReceiver,
android.os.Process.myUserHandle(), 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();
| | protected void | onDetachedFromWindow()
super.onDetachedFromWindow();
if (mAttached) {
getContext().unregisterReceiver(mIntentReceiver);
mAttached = false;
}
| | protected void | onDraw(android.graphics.Canvas canvas)
super.onDraw(canvas);
boolean changed = mChanged;
if (changed) {
mChanged = false;
}
int availableWidth = mRight - mLeft;
int availableHeight = mBottom - mTop;
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();
if (scaled) {
canvas.restore();
}
| | 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(resolveSizeAndState((int) (mDialWidth * scale), widthMeasureSpec, 0),
resolveSizeAndState((int) (mDialHeight * scale), heightMeasureSpec, 0));
| | protected void | onSizeChanged(int w, int h, int oldw, int oldh)
super.onSizeChanged(w, h, oldw, oldh);
mChanged = true;
| | 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;
updateContentDescription(mCalendar);
| | private void | updateContentDescription(android.text.format.Time time)
final int flags = DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_24HOUR;
String contentDescription = DateUtils.formatDateTime(mContext,
time.toMillis(false), flags);
setContentDescription(contentDescription);
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