Water Ripple effect---3 ring ripple

Import Android.content.context;import Android.graphics.bitmap;import Android.graphics.canvas;import Android.graphics.color;import Android.graphics.matrix;import Android.graphics.paint;import Android.graphics.porterduff;import Android.graphics.porterduffxfermode;import Android.graphics.Bitmap.Config; Import Android.os.handler;import android.os.message;import android.util.displaymetrics;import android.util.Log; Import android.view.view;import android.view.viewgroup;import android.widget.imageview;/** * Water Ripple View * @author Alan * * * * public Class Waterview Extends view{/** * Opacity (fully transparent: 0) */private int radius1;private int radius2;private int Radius3;priva  te int alpha1;private int alpha2;private int alpha3;private paint paint1;private paint paint2;private paint paint3;private int widthscreen;private int heightscreen;private Handler mhandler;/** * Picture diameter */private static final int MIN = 50; Public Waterview (Context Context,bitmap source) {super (context); init ();//Gets the screen's wide height displaymetrics dm = getresourCES (). Getdisplaymetrics (); widthscreen = Dm.widthpixels;heightscreen = Dm.heightpixels;mhandler = new Handler () {@ overridepublic void Handlemessage (Message msg) {super.handlemessage (msg); switch (msg.what) {case 0:flushstate (); WaterView.this.invalidate (); if (Alpha1 ==0 | | ALPHA2 ==0 | | Alpha3 ==0) {log.i ("TAG", "alpha1-->" +alpha1+ "alpha2-->" +alpha2+ "alpha3-->" +ALPHA3); Mhandler.sendemptymessage (1);} Else{mhandler.sendemptymessagedelayed (0, 50);} Break;case 1:initsimple (); WaterView.this.invalidate (); mhandler.sendemptymessage (0); break;default:break;}}; Mhandler.sendemptymessage (0);} @Overrideprotected void onmeasure (int widthmeasurespec, int heightmeasurespec) {//TODO auto-generated method Stubsuper.onmeasure (Widthmeasurespec, heightmeasurespec);} @Overrideprotected void OnDraw (canvas canvas) {log.i ("TAG", "OnDraw ..."); Super.ondraw (canvas);//Draw round// C1 (min circle) canvas.drawcircle (WIDTHSCREEN/2, This.getheight ()/2, RADIUS1, paint1);//c2canvas.drawcircle (WIDTHSCREEN/2, This.getheight ()/2, RADIUS2,PAINT2);//c3canvas.drawcircle (WIDTHSCREEN/2, This.getheight ()/2, RADIUS3, PAINT3);} private void Init () {alpha1 = 255;radius1 = min/2;alpha2= 175;radius2 = min/2 + 80;alpha3 = 95;RADIUS3 = MIN/2 + 160 ; Initpaint ();} private void Initsimple () {if (alpha1 = = 0) {alpha1 = 255;radius1 = Min/2;paint1.setcolor (Color.Blue);} if (alpha2 = = 0) {alpha2 = 255;radius2 = Min/2;paint2.setcolor (Color.Blue);} if (Alpha3 = = 0) {alpha3 = 255;radius3 = Min/2;paint3.setcolor (Color.Blue);} Paint1.setalpha (ALPHA1);p Aint2.setalpha (ALPHA2);p Aint3.setalpha (ALPHA3);} private void Flushstate () {radius1 +=5;alpha1-=5;//control speed, the larger the value, the quicker the ring expands radius2 +=5;alpha2-=5;radius3 +=5;alpha3-=5;if ( Alpha1 <= 0) {alpha1 = 0;} if (alpha2 <= 0) {alpha2 = 0;} if (alpha3 <= 0) {alpha3 = 0;} Paint1.setalpha (ALPHA1);p Aint2.setalpha (ALPHA2);p Aint3.setalpha (ALPHA3);} private void Initpaint () {//new brush paint1 = new paint ();p Aint1.setantialias (TRUE);//Set anti-aliasing paint1.setstrokewidth (float ) 1);//Set the line width 1paint1.setstyle (Paint.Style.STROKE);//Set Hollow brush, ring-shaped Paint1.setalpha (alpha1);p Aint1.setcolor (Color.Blue);//define Brush 2paint2 = new paint (); Paint2.setantialias (TRUE);//Set anti-aliasing paint2.setstrokewidth ((float) 1);//Set line width 1paint2.setstyle (Paint.Style.STROKE);// Set the hollow brush, Draw Paint2.setalpha (ALPHA2) in a circular manner;//define Brush 3paint3 = new paint ();p Aint3.setantialias (TRUE);// Set the antialiasing paint3.setstrokewidth ((float) 1),//Set the line width 1paint3.setstyle (Paint.Style.STROKE),//Set the hollow brush, draw the paint3.setalpha in a ring way (ALPHA3);}}

Water Ripple effect---3 ring ripple