Android时钟

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(); } } } }