FingerTouch

    private static      Paint       mPaint;
    private static      Bitmap      mBitmap;
    private static      Canvas      mCanvas;
    private static      Path        mPath;
    private static      int  mFlag = 0;
    private static      int  mDirty = 0;
    private static      float mX, mY;
    private static final float TOUCH_TOLERANCE = 1;

    public static void touch_start(float x, float y) {
        if(mFlag != 0 && mBitmap != null) {
            mPath.reset();
            Log.v(TAG,"start x = " + x + ",y = " + y);
            mPath.moveTo(x, y);
            mX = x;
            mY = y;
        }
    }
    public static void touch_move(float x, float y) {
        Log.v(TAG,"move x = " + x + ",y = " + y);
        if(mFlag != 0 && mBitmap != null) {
            float dx = Math.abs(x - mX);
            float dy = Math.abs(y - mY);
            if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
                mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
                mX = x;
                mY = y;
            }
            mDirty = 1;
        }
    }
    public static void touch_up() {
        Log.v(TAG,"end touch up");
        if(mFlag != 0 && mBitmap != null) {
            mPath.lineTo(mX, mY);
            mCanvas.drawPath(mPath, mPaint);
            JNILib.shotVideoPicture(mBitmap);
            mPath.reset();
            mDirty = 0;
        }
    }
    
    private void setFlag(int a,int b,int c,int d)
    {
        if(a != 0 || b != 0 || c != 0 | d != 0)
        {
            mFlag = 1;
            Log.v(TAG,"mFlag == 1");
            if(mBitmap.isRecycled())
            {
                mBitmap.recycle();
                mBitmap = null;
            }
            if(mBitmap == null) {
                mBitmap = Bitmap.createBitmap(c,d, Bitmap.Config.ARGB_8888);
                mCanvas = new Canvas(mBitmap);
            }
        } else {
            Log.v(TAG,"mFlag == 0");
            mFlag = 0;
        }
    }

    void init() 
   {
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        mPaint.setColor(0xFFFFFFFF);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(6);
        mPath = new Path();
        mFlag = 0;mDirty = 0;

    }