Android implements handwritten signature _android

This article provides an example of how the Android handwriting signature is implemented, and the product requires users to sign an agreement on the app. So have to get a handwritten signature version, refer to some material oneself wrote a paintview to inherit view, realize the signature function.

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.
 * Signature Version */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, 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? CAC
  Hebbitmap.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);/notification
  Parent control do not block this control touch event 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 ();//Hide the reminder text break;
    Case MOTIONEVENT.ACTION_UP: {cachecanvas.drawpath (path, paint);
    Path.reset ();
   Break
 
  } invalidate ();
 return true; } public interfaceonmovelisener{void Hidewords ()//main interface callback hides prompt text}} 

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