Android Custom View Draw Alarm

Android Custom View Draw Alarm

This article simply implements an alarm clock, extending the View,canvas drawing
The effect is as follows:

The code is as follows:

 PackageCom.gaofeng.mobile.clock_demo;ImportAndroid.content.Context;ImportAndroid.graphics.Bitmap;ImportAndroid.graphics.BitmapFactory;ImportAndroid.graphics.Canvas;ImportAndroid.graphics.Color;ImportAndroid.graphics.Paint;ImportAndroid.util.AttributeSet;ImportAndroid.util.Log;ImportAndroid.view.View;ImportJava.util.Calendar;/** * Created by Gaofeng on 15-8-29. * * Public  class clockview extends View {     Public Clockview(Context context) {Super(context);        Ringhourbitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.ring);        Ringminbitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.ring_min);        Synctime (); Setschedualtime (0); } Public Clockview(context context, AttributeSet attrs) {Super(context, attrs); } Public Clockview(context context, AttributeSet attrs,intDEFSTYLEATTR) {Super(Context, attrs, defstyleattr); }//Radius and Circle Center    Private Static Final floatRadius = $;Private Static Final floatCenterX = -;Private Static Final floatCenterY = -;Private floatSecondsdegree =0;Private floatMindegree =0;Private floatHourdegree =0;//Timing    Private floatSethourdegree;Private floatSetmindegree;Private Booleansetschedual;PrivateBitmap Ringhourbitmap;PrivateBitmap Ringminbitmap;Private intBitmapwidth = -, Bitmapheight = -;@Override    protected void OnDraw(Canvas canvas) {Super. OnDraw (canvas);Try{//Stopwatch ProgressThread.Sleep ( +); }Catch(Interruptedexception e)        {E.printstacktrace ();        } setbackgroundcolor (Color.green);        Drawcircle (canvas);        Drawclockpoint (canvas);        Drawindicator (canvas);        Calc ();        Drawschedual (canvas);    Invalidate (); }Private void drawschedual(Canvas canvas) {if(setschedual) {Paint p =NewPaint ();//Find the coordinates of the hour            floatrad = (float) Math.toradians (Sethourdegree);floatx = (float) (Radius * Math.sin (RAD));floaty = (float) (Radius * Math.Cos (RAD));floatVX = CenterX + x;floatVY = centery-y;//More stupid method to solve the picture drawn in the circle. The drawing starts from the top left corner of the phone.            if(Sethourdegree >0&& Sethourdegree <= -) {VX = Vx-bitmapwidth; }if(Sethourdegree > -&& Sethourdegree < the) {VX = Vx-bitmapwidth;            VY = Vy-bitmapwidth; }if(Sethourdegree > the&& Sethourdegree < the) {vy = Vy-bitmapwidth; } LOG.D ("","Range x:"+ VX +"y:"+ VY); Canvas.drawbitmap (RINGHOURBITMAP,VX, VY, p);//Find coordinates for minutesrad = (float) Math.toradians (Setmindegree); x = (float) (Radius * Math.sin (RAD)); y = (float) (Radius * Math.Cos (RAD));             VX = CenterX + x; VY = centery-y;if(Setmindegree >0&& Setmindegree <= -) {VX = Vx-bitmapwidth; }if(Setmindegree > -&& Setmindegree < the) {VX = Vx-bitmapwidth;            VY = Vy-bitmapwidth; }if(Setmindegree > the&& Setmindegree < the) {vy = Vy-bitmapwidth;            } canvas.drawbitmap (Ringminbitmap,vx,vy, p); p =NULL; }    }Private void Calc() {Secondsdegree = Secondsdegree +6;if(Secondsdegree >= the) {//lap for one minuteSecondsdegree =0; Mindegree = Mindegree +6; }if(Mindegree >= the) {//lap for one hoursMindegree =0; Hourdegree = Hourdegree +6; }if(Hourdegree >= the) {//lap or starting at 0 degreesHourdegree =0; }    }//Draw a circle    Private void drawcircle(Canvas canvas) {Paint paint =NewPaint ();        Paint.setcolor (color.red); Paint.setstrokewidth (2);        Canvas.drawcircle (Centerx,centery,radius,paint); Paint Paint2 =NewPaint ();        Paint2.setcolor (Color.yellow); Paint2.setstrokewidth ( thef);    Canvas.drawpoint (Centerx,centery,paint2); }Private void Drawclockpoint(Canvas canvas) {Paint paint =NewPaint ();        Paint.setcolor (Color.yellow); Paint.setstrokewidth (Tenf);//Draw The tick value above the alarm clock, a total of 12 points, 360 degrees         for(floatdegree =0; Degree <= the;d Egree = degree + -) {//mathematical formula find the dot coordinate above the circle            floatrad = (float) Math.toradians (degree);//Convert to degrees            floatx = (float) (Radius * Math.sin (RAD));floaty = (float) (Radius * Math.Cos (RAD));        Canvas.drawpoint (x + CenterX, centery-y,paint); }    }//Draw the pointer, turn the slow pointer thicker, the default will start from 0    Private void Drawindicator(Canvas canvas) {Paint paint =NewPaint ();        Paint.setcolor (Color.Black); Paint.setstrokewidth (3f);//Second hand_drawline (Canvas,secondsdegree,paint);//minute handPaint.setcolor (Color.dkgray); Paint.setstrokewidth (6f); _drawline (Canvas,mindegree,paint);//hourPaint.setcolor (Color.White); Paint.setstrokewidth ( Af);    _drawline (Canvas,hourdegree,paint); }Private void _drawline(Canvas canvas,floatDegree,paint Paint) {floatrad = (float) Math.toradians (degree);//Convert to degrees        floatx = (float) (Radius * Math.sin (RAD));floaty = (float) (Radius * Math.Cos (RAD));    Canvas.drawline (CenterX, centery, x + CenterX, centery-y, paint); } Public void Setschedualtime(LongTime) {Calendar cal = Calendar.getinstance (); Cal.settimeinmillis (time);//Demo        inthour = -;intMin = *;if(Hour > A) {//is a 24-hour typehour = hour- A; }//calculation is the same as beforeSethourdegree = Hour * -; Setmindegree = min *6; Setschedual =true; }//And phone time synchronization     Public void Synctime() {Calendar cal = Calendar.getinstance ();inthour = Cal.get (Calendar.hour_of_day);intmin = Cal.get (calendar.minute);intSecond = Cal.get (Calendar.second); LOG.D ("","Time now Hour:"+ Hour +"Min:"+ min +"Second:"+ second);if(Hour > A) {//is a 24-hour typehour = hour- A; }//Calculate radians each step is 60/360 = 6 degrees, Hour 12/360 degreesHourdegree = Hour * -; Mindegree = min *6; Secondsdegree = Second *6; }}

Summarize
-no numbers are drawn for clocks, this is just a simple drawing of text
-Determine if the timing picture is in the circle, do it relatively simple did not spend too much time to find a way
-If you want to implement the need to extend the pointer viewgroup

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Android Custom View draw alarm