package com.tobacco.touchdraw;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.SurfaceHolder.Callback;
import android.view.View.OnTouchListener;
public class LSurfaceView extends SurfaceView implements Callback,OnTouchListener,Runnable{
 private SurfaceHolder sfh;
 private Canvas canvas;
 private Paint paint;
 private Path path;
 private ArrayList<Path> paths;
 private boolean flag;
 public LSurfaceView(Context context) {
 super(context);
 sfh=this.getHolder();
 sfh.addCallback(this);
 paint=new Paint();
 paint.setColor(Color.RED);
 paint.setAntiAlias(true);
 paint.setStrokeWidth(4);
 paint.setStyle(Paint.Style.STROKE);
 paint.setStrokeCap(Paint.Cap.ROUND);
 paths=new ArrayList<Path>();
 path=new Path();
 }
 public void myDraw(MotionEvent e){
 int action=e.getAction();
 switch(action){
 case MotionEvent.ACTION_DOWN:
  path.moveTo(e.getX(),e.getY());
  break;
 case MotionEvent.ACTION_MOVE:
  path.lineTo(e.getX(),e.getY());
  break;
 case MotionEvent.ACTION_UP:
  //path.close();
  Path path1=new Path(path);
  paths.add(path1);
  path.reset();
  break;
 }
 
 
 }
 @Override
 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
 
 
 }
 @Override
 public void surfaceCreated(SurfaceHolder holder) {
 flag=true;
 setOnTouchListener(this);
 new Thread(this).start();
 
 }
 @Override
 public void surfaceDestroyed(SurfaceHolder holder) {
 flag=false;
 }
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 myDraw(event);
 return true;
 }
 @Override
 public void run() {
 while(flag){
  long start=System.currentTimeMillis();
  canvas=sfh.lockCanvas();
  if(canvas!=null){
  canvas.drawColor(Color.BLACK);
  for(int i=0;i<paths.size();i++)
   canvas.drawPath(paths.get(i),paint);
  canvas.drawPath(path,paint);
  sfh.unlockCanvasAndPost(canvas);
  }
  long end=System.currentTimeMillis();
  try{
  if(end-start<30){
   Thread.sleep(30-(end-start));
  }
  }
  catch(Exception e){
  }
 }
 
 }
}

package com.tobacco.touchdraw;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.SurfaceHolder.Callback;
import android.view.View.OnTouchListener;
public class MySurfaceView extends SurfaceView implements Callback,OnTouchListener,Runnable{
 private SurfaceHolder sfh;
 private Canvas canvas;
 private Paint paint;
 private float lastX,lastY;
 private Path path;
 private boolean flag;
 public MySurfaceView(Context context) {
 super(context);
 sfh=this.getHolder();
 sfh.addCallback(this);
 paint=new Paint();
 paint.setColor(Color.RED);
 paint.setAntiAlias(true);
 paint.setStrokeWidth(5);
 paint.setStyle(Paint.Style.STROKE);
 paint.setStrokeCap(Paint.Cap.ROUND);
 path=new Path();
 
 }
 public void myDraw(MotionEvent e){
 int action=e.getAction();
 switch(action){
 case MotionEvent.ACTION_DOWN:
  path.moveTo(e.getX(),e.getY());
  lastX=e.getX();
  lastY=e.getY();
  break;
 case MotionEvent.ACTION_MOVE:
  path.quadTo(lastX,lastY,e.getX(),e.getY());
  lastX=e.getX();
  lastY=e.getY();
  break;
 case MotionEvent.ACTION_UP:
  //path.quadTo(lastX,lastY,e.getX(),e.getY());
  path.reset();
  break;
 }
 
 
 }
 @Override
 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
 
 
 }
 @Override
 public void surfaceCreated(SurfaceHolder holder) {
 flag=true;
 setOnTouchListener(this);
 new Thread(this).start();
 
 }
 @Override
 public void surfaceDestroyed(SurfaceHolder holder) {
 flag=false;
 }
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 myDraw(event);
 return true;
 }
 @Override
 public void run() {
 while(flag){
  long start=System.currentTimeMillis();
  canvas=sfh.lockCanvas();
  if(canvas!=null){
  canvas.drawPath(path,paint);
  sfh.unlockCanvasAndPost(canvas);
  }
  long end=System.currentTimeMillis();
  try{
  if(end-start<100){
   Thread.sleep(100-(end-start));
  }
  }
  catch(Exception e){
  }
 }
 
 }
}