wave

效果图：

package com.example.wavedemo;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Align;import android.graphics.Paint.FontMetrics;import android.graphics.Path;import android.graphics.Rect;import android.text.TextPaint;import android.util.AttributeSet;import android.view.View;/** * 水波纹数字 *  * @author huozhenpeng *  */public class WaveTextView extends View {private TextPaint textPaint;private TextPaint textPaint2;private int textSize = 200;private int textPaintWidth = 50;private int width;private int height;private int Delta;private int step;private Path path;private FontMetrics fontMetrics;private String text = "85";private int baseline;private int max;private float controlY1;// 两个控制点的纵坐标private float controlY2;private int fraction = 1;// 1或者-1    private Rect bounds;public WaveTextView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}public WaveTextView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public WaveTextView(Context context) {this(context, null);}public void init() {textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);textPaint.setColor(Color.parseColor("#0e92ca"));textPaint.setTextSize(textSize);textPaint.setStrokeWidth(textPaintWidth);textPaint.setTextAlign(Align.CENTER);fontMetrics = textPaint.getFontMetrics();textPaint2 = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);textPaint2.setColor(Color.parseColor("#efefef"));textPaint2.setTextSize(textSize);textPaint2.setStrokeWidth(textPaintWidth);textPaint2.setTextAlign(Align.CENTER);path = new Path();bounds=new Rect();textPaint.getTextBounds(text, 0, text.length(), bounds);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {if (MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY) {widthMeasureSpec = MeasureSpec.makeMeasureSpec((int) textPaint.measureText(text), MeasureSpec.EXACTLY);}if (MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY) {heightMeasureSpec = MeasureSpec.makeMeasureSpec((int) (bounds.height()),MeasureSpec.EXACTLY);}super.onMeasure(widthMeasureSpec, heightMeasureSpec);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);width = w;height = h;baseline = (int) ((fontMetrics.descent + fontMetrics.ascent) / 2);max = (int) (Integer.parseInt(text) / 100.0f * height);}@Overrideprotected void onDraw(Canvas canvas) {if (Delta >= max) {Delta = max;}path.reset();path.moveTo(0, 0);path.lineTo(width, 0);path.lineTo(width, height - Delta);controlY1 = step + (height - Delta);controlY2 = -step + (height - Delta);if (controlY1 - (height - Delta) >= height * 1.0f / 4) {fraction = -1;}if (controlY1 - (height - Delta) <= -height * 1.0f / 4) {fraction = 1;}path.cubicTo(width * 3.0f / 4, controlY1, width * 1.0f / 4, controlY2,0, height - Delta);path.close();canvas.drawColor(Color.parseColor("#ffffff"));canvas.drawText(text, width / 2, height / 2 - baseline, textPaint);canvas.save();canvas.clipPath(path);canvas.drawText(text, width / 2, height / 2 - baseline, textPaint2);canvas.restore();super.onDraw(canvas);}public void setText(int text) {this.text = text + "";new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(20);Delta += 1;step += 1 * fraction;postInvalidate();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}).start();}}