1. Android时钟效果图：
2. 时钟所需资源：
（1）时钟表盘：
（2）时钟时针：
（3）时钟分针和秒针：
3. 代码实现：
package com.android.clockview;
import java.util.Calendar;
import java.util.TimeZone;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
public class ClockView extends Activity {
private final int FP = ViewGroup.LayoutParams.FILL_PARENT;
private final int WC = ViewGroup.LayoutParams.WRAP_CONTENT;
private QAnalogClock clock1;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout lLayout = new LinearLayout(this);
lLayout.setLayoutParams(new LinearLayout.LayoutParams(FP, FP));
lLayout.setOrientation(LinearLayout.VERTICAL);
clock1 = new QAnalogClock(this, "GMT+8:00");
lLayout.addView(clock1, new LinearLayout.LayoutParams(WC, WC));
setContentView(lLayout);
}
class QAnalogClock extends View {
Bitmap mBmpDial;
Bitmap mBmpHour;
Bitmap mBmpMinute;
Bitmap mBmpSecond;
BitmapDrawable bmdHour;
BitmapDrawable bmdMinute;
BitmapDrawable bmdSecond;
BitmapDrawable bmdDial;
Paint mPaint;
Handler tickHandler;
int mWidth;
int mHeigh;
int mTempWidth;
int mTempHeigh;
int centerX;
int centerY;
int availableWidth = 100;
int availableHeight = 100;
private String sTimeZoneString;
public QAnalogClock(Context context, String sTime_Zone) {
super(context);
sTimeZoneString = sTime_Zone;
mBmpHour = BitmapFactory.decodeResource(getResources(),
R.drawable.android_clock_hour);
bmdHour = new BitmapDrawable(mBmpHour);
mBmpMinute = BitmapFactory.decodeResource(getResources(),
R.drawable.android_clock_minute);
bmdMinute = new BitmapDrawable(mBmpMinute);
mBmpSecond = BitmapFactory.decodeResource(getResources(),
R.drawable.android_clock_minute);
bmdSecond = new BitmapDrawable(mBmpSecond);
mBmpDial = BitmapFactory.decodeResource(getResources(),
R.drawable.android_clock_dial);
bmdDial = new BitmapDrawable(mBmpDial);
mWidth = mBmpDial.getWidth();
mHeigh = mBmpDial.getHeight();
centerX = availableWidth / 2;
centerY = availableHeight / 2;
mPaint = new Paint();
mPaint.setColor(Color.BLUE);
run();
}
public void run() {
tickHandler = new Handler();
tickHandler.post(tickRunnable);
}
private Runnable tickRunnable = new Runnable() {
public void run() {
postInvalidate();
tickHandler.postDelayed(tickRunnable, 1000);
}
};
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Calendar cal = Calendar.getInstance(TimeZone
.getTimeZone(sTimeZoneString));
int hour = cal.get(Calendar.HOUR);
int minute = cal.get(Calendar.MINUTE);
int second = cal.get(Calendar.SECOND);
float hourRotate = hour * 30.0f + minute / 60.0f * 30.0f;
float minuteRotate = minute * 6.0f;
float secondRotate = second * 6.0f;
boolean scaled = false;
if (availableWidth < mWidth || availableHeight < mHeigh) {
scaled = true;
float scale = Math.min((float) availableWidth / (float) mWidth,
(float) availableHeight / (float) mHeigh);
canvas.save();
canvas.scale(scale, scale, centerX, centerY);
}
bmdDial.setBounds(centerX - (mWidth / 2), centerY - (mHeigh / 2),
centerX + (mWidth / 2), centerY + (mHeigh / 2));
bmdDial.draw(canvas);
mTempWidth = bmdHour.getIntrinsicWidth();
mTempHeigh = bmdHour.getIntrinsicHeight();
canvas.save();
canvas.rotate(hourRotate, centerX, centerY);
bmdHour.setBounds(centerX - (mTempWidth / 2), centerY
- (mTempHeigh / 2), centerX + (mTempWidth / 2), centerY
+ (mTempHeigh / 2));
bmdHour.draw(canvas);
canvas.restore();
mTempWidth = bmdMinute.getIntrinsicWidth();
mTempHeigh = bmdMinute.getIntrinsicHeight();
canvas.save();
canvas.rotate(minuteRotate, centerX, centerY);
bmdMinute.setBounds(centerX - (mTempWidth / 2), centerY
- (mTempHeigh / 2), centerX + (mTempWidth / 2), centerY
+ (mTempHeigh / 2));
bmdMinute.draw(canvas);
canvas.restore();
mTempWidth = bmdSecond.getIntrinsicWidth();
mTempHeigh = bmdSecond.getIntrinsicHeight();
canvas.rotate(secondRotate, centerX, centerY);
bmdSecond.setBounds(centerX - (mTempWidth / 2), centerY
- (mTempHeigh / 2), centerX + (mTempWidth / 2), centerY
+ (mTempHeigh / 2));
bmdSecond.draw(canvas);
if (scaled) {
canvas.restore();
}
}
}
}
