첫이미지에서 확대/축소후에 "더블터치"시에 원상태 이미지로 되돌아 가려고 합니다.

초바자이다 보니.. 어떻게 해야 할지모르겠습니다.

  public boolean onTouch(View v, MotionEvent event) {
  ImageView view = (ImageView) v;
  view.setScaleType(ImageView.ScaleType.MATRIX);
  float scale;
  

  dumpEvent(event);

  switch (event.getAction() & MotionEvent.ACTION_MASK) {

  case MotionEvent.ACTION_DOWN:
   savedMatrix.set(matrix);
   start.set(event.getX(), event.getY());
   Log.d(TAG, "mode=DRAG");
   mode = DRAG;
   break;
  case MotionEvent.ACTION_UP:
  case MotionEvent.ACTION_POINTER_UP:
   mode = NONE;
   Log.d(TAG, "mode=NONE");
   break;
  case MotionEvent.ACTION_POINTER_DOWN:
   oldDist = spacing(event);
   Log.d(TAG, "oldDist=" + oldDist);
   if (oldDist > 5f) {
    savedMatrix.set(matrix);
    midPoint(mid, event);
    mode = ZOOM;
    Log.d(TAG, "mode=ZOOM");
   }
   break;

  case MotionEvent.ACTION_MOVE:
   if (mode == DRAG) {
    matrix.set(savedMatrix);
    if (view.getLeft() >= -392) {
     matrix.postTranslate(event.getX() - start.x, event.getY()
       - start.y);
    }
   } else if (mode == ZOOM) {
    float newDist = spacing(event);
    Log.d(TAG, "newDist=" + newDist);
    if (newDist > 5f) {
     matrix.set(savedMatrix);
     scale = newDist / oldDist;
     matrix.postScale(scale, scale, mid.x, mid.y);
    }
   }
   break;
  }

  view.setImageMatrix(matrix);

  return true;
 }

 private float spacing(MotionEvent event) {
  float x = event.getX(0) - event.getX(1);
  float y = event.getY(0) - event.getY(1);
  return FloatMath.sqrt(x * x + y * y);
 }

 private void midPoint(PointF point, MotionEvent event) {
  float x = event.getX(0) + event.getX(1);
  float y = event.getY(0) + event.getY(1);
  point.set(x / 2, y / 2);
 }

 private void dumpEvent(MotionEvent event) {
  String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE",
    "POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
  StringBuilder sb = new StringBuilder();
  int action = event.getAction();
  int actionCode = action & MotionEvent.ACTION_MASK;
  sb.append("event ACTION_").append(names[actionCode]);
  if (actionCode == MotionEvent.ACTION_POINTER_DOWN
    || actionCode == MotionEvent.ACTION_POINTER_UP) {
   sb.append("(pid ").append(
     action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
   sb.append(")");
  }
  sb.append("[");
  for (int i = 0; i < event.getPointerCount(); i++) {
   sb.append("#").append(i);
   sb.append("(pid ").append(event.getPointerId(i));
   sb.append(")=").append((int) event.getX(i));
   sb.append(",").append((int) event.getY(i));
   if (i + 1 < event.getPointerCount())
    sb.append(";");
  }
  sb.append("]");
  Log.d(TAG, sb.toString());
 }

 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
  switch (keyCode) {
  case KeyEvent.KEYCODE_BACK:
   String alertTitle = getResources().getString(R.string.app_name);
   String buttonMessage = getResources().getString(R.string.sdi_exit);
   String buttonYes = getResources().getString(R.string.sdi_yes);
   String buttonNo = getResources().getString(R.string.sdi_no);

   new AlertDialog.Builder(SdiLicense.this)
     .setTitle(alertTitle)
     .setMessage(buttonMessage)
     .setPositiveButton(buttonYes,
       new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog,
          int which) {
         moveTaskToBack(true);
         finish();
        }
       }).setNegativeButton(buttonNo, null).show();
  }
  return true;
 }
}