[androidbrasil-dev] salvar canvas

package br.com.android;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;

public class SampleCanvasActivity extends Activity implements OnTouchListener{
   
    DrawPanel dp;
    private ArrayList<Path> pointsToDraw = new ArrayList<Path>();
    private Paint mPaint;
    Path path;
    private Button button;
    protected static final int SALVAR = 1;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
       
        dp = new DrawPanel(this);
        dp.setOnTouchListener(this);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        mPaint = new Paint();
        mPaint.setDither(true);
        mPaint.setColor(Color.WHITE);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(3);
        FrameLayout fl = new FrameLayout(this); 
        fl.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); 
        fl.addView(dp); 
        setContentView(fl); 
       
   
    }

   
    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        dp.pause();
    }
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        dp.resume();
    }
   
    public boolean onTouch(View v, MotionEvent me) {
        // TODO Auto-generated method stub
                synchronized(pointsToDraw)
                {
        if(me.getAction() == MotionEvent.ACTION_DOWN){
            path = new Path();
            path.moveTo(me.getX(), me.getY());
            //path.lineTo(me.getX(), me.getY());
            pointsToDraw.add(path);
        }else if(me.getAction() == MotionEvent.ACTION_MOVE){
            path.lineTo(me.getX(), me.getY());
        }else if(me.getAction() == MotionEvent.ACTION_UP){
            //path.lineTo(me.getX(), me.getY());
        }
        }      
        return true;
    }
   
   
    public class DrawPanel extends SurfaceView implements Runnable{

        Thread t = null;
        SurfaceHolder holder;
        boolean isItOk = false ;

        public DrawPanel(Context context) {
            super(context);
            // TODO Auto-generated constructor stub
            holder = getHolder();
        }

        public void run() {
            // TODO Auto-generated method stub
            while( isItOk == true){

                if(!holder.getSurface().isValid()){
                    continue;
                }

                Canvas c = holder.lockCanvas();
                c.drawARGB(255, 0, 0, 0);
                onDraw(c);
                holder.unlockCanvasAndPost(c);
            }
        }

        @Override
        protected void onDraw(Canvas canvas) {
            // TODO Auto-generated method stub
            super.onDraw(canvas);
                        synchronized(pointsToDraw)
                        {
            for (Path path : pointsToDraw) {
                canvas.drawPath(path, mPaint);
            }
                        }
        }

        public void pause(){
            isItOk = false;
            while(true){
                try{
                    t.join();
                }catch(InterruptedException e){
                    e.printStackTrace();
                }
                break;
            }
            t = null;
        }

        public void resume(){
            isItOk = true; 
            t = new Thread(this);
            t.start();

        }
    }
   
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, SALVAR, 0, "Salvar");
        return super.onCreateOptionsMenu(menu);
          
    }
    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        switch (item.getItemId()) {
        case SALVAR:
         
          break;
      }
      return true;
    }


}