本文实例为大家分享了Android手写签名的实现方法,产品要求用户可以在app上签协议。。所以得弄个手写签名版,参考了一些资料自己写了个PaintView去继承View,实现签名功能。
package com.****.*****.widget; import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View; /** * This view implements the drawing canvas. * <p/> * It handles all of the input events and drawing functions. * 签名版 */public class PaintView extends View { private Paint paint; private Canvas cacheCanvas; private Bitmap cachebBitmap; private Path path; private OnMoveLisener lisener; public void setSize(int width,int height,OnMoveLisener lisener) {this.lisener=lisener;init(width,height); }public PaintView(Context context, AttributeSet attrs) {super(context, attrs);//init(0,0); }public Bitmap getCachebBitmap() {return cachebBitmap; }private void init(int width,int height) {paint = new Paint();paint.setAntiAlias(true);paint.setStrokeWidth(3);paint.setStyle(Paint.Style.STROKE);paint.setColor(Color.BLACK);path = new Path();cachebBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);cacheCanvas = new Canvas(cachebBitmap);cacheCanvas.drawColor(Color.WHITE); }public void clear() {if (cacheCanvas != null) {paint.setColor(Color.WHITE); cacheCanvas.drawPaint(paint); paint.setColor(Color.BLACK); cacheCanvas.drawColor(Color.WHITE); invalidate();} } @Override protected void onDraw(Canvas canvas) {// canvas.drawColor(BRUSH_COLOR);canvas.drawBitmap(cachebBitmap, 0, 0, null);canvas.drawPath(path, paint); }@Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { int curW = cachebBitmap != null ? cachebBitmap.getWidth() : 0;int curH = cachebBitmap != null ? cachebBitmap.getHeight() : 0;if (curW >= w && curH >= h) { return;} if (curW < w) curW = w;if (curH < h) curH = h; Bitmap newBitmap = Bitmap.createBitmap(curW, curH, Bitmap.Config.ARGB_8888);Canvas newCanvas = new Canvas();newCanvas.setBitmap(newBitmap);if (cachebBitmap != null) { newCanvas.drawBitmap(cachebBitmap, 0, 0, null);}cachebBitmap = newBitmap;cacheCanvas = newCanvas; }private float cur_x, cur_y;@Override public boolean onTouchEvent(MotionEvent event) { getParent().requestDisallowInterceptTouchEvent(true);// 通知父控件勿拦截本控件touch事件 float x = event.getX();float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: {cur_x = x;cur_y = y;path.moveTo(cur_x, cur_y);break; }case MotionEvent.ACTION_MOVE: {path.quadTo(cur_x, cur_y, x, y);cur_x = x;cur_y = y;lisener.hideWords();//隐藏提醒的文字break; }case MotionEvent.ACTION_UP: {cacheCanvas.drawPath(path, paint);path.reset();break; }} invalidate(); return true; } public interface OnMoveLisener{void hideWords();//主界面回调后隐藏提示文字 }}以上就是本文的全部内容,希望对大家的学习有所帮助。