infor from : http://blog.csdn.net/mayingcai1987/article/details/6246153
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();
- }
- }
- }
- }
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