Wie kann ich Bild von seinem Mittelpunkt vergrößern?

Question

dies ist mein Code im erfolgreich von links oben zoomen, aber ich möchte in der Mitte des Bildes vergrößern und will eine Größe von image.I versucht, mir diesen Code bis now.Help durch sie bitte

@Override 
    public boolean onTouchEvent(MotionEvent event) { 
    //Log.e(Codistan_Tag, "Touch Event: " +MotionEvent.actionToString(event.getAction())); 
    if(isImageReady) { 

     if(isSelectionDragEnabled) 
      mPanListener.onTouchEvent(event); 

     if (isZoomEnabled) { 
      if(event.getAction() == MotionEvent.ACTION_DOWN){ 
       anchor_scale = mScaleFactor; 
      } 
      mScaleDetector.onTouchEvent(event); 
      mPanListener.onTouchEvent(event); 
     } else { 
      switch (event.getAction()) { 
       case MotionEvent.ACTION_POINTER_3_DOWN: 
        break; 
       case MotionEvent.ACTION_POINTER_2_DOWN: 
        break; 
       case MotionEvent.ACTION_POINTER_1_UP: 

        break; 
       case MotionEvent.ACTION_DOWN: 

        if (isSelectionToolEnabled) 
         isDrawFinished = false; 

        orig_x = event.getX(); 
        orig_y = event.getY(); 

        //Log.e(Codistan_Tag, "-------ORIGIN-------s: " + String.valueOf(orig_x) + " " + String.valueOf(orig_y)); 

        orig_x = (orig_x - dest.left); 
        orig_y = (orig_y - dest.top); 

        if(java.lang.Math.round(mScaleFactor) > 2) { 
         orig_x += (scale_cur_x * (riz_scale)); 
         orig_y += (scale_cur_y * (riz_scale)); 
        } else { 
         orig_x += (scale_cur_x); 
         orig_y += (scale_cur_y); 
        } 

        orig_x /= java.lang.Math.round(mScaleFactor); 
        orig_y /= java.lang.Math.round(mScaleFactor); 

        orig_x *= scale; 
        orig_y *= scale; 

        //mSelectionTaskManager.setOrigin((int) orig_x, (int) orig_y); 
        if(isSelectionToolEnabled) 
         MovementStack.add(new Pair((int)orig_x, (int)orig_y)); 

        Log.e(Codistan_Tag, "Codistan Origins: " + String.valueOf(orig_x) + ", " + String.valueOf(orig_y)); 

        break; 
       case MotionEvent.ACTION_MOVE: 
        max_dist = dist * scale; 
        if (event.getAction() != 1) { 
         move_x = event.getX(); 
         move_y = event.getY(); 

         //Log.e(Codistan_Tag, "Move: " + String.valueOf(move_x) + ", " + String.valueOf(move_y)); 

         move_x = (move_x - dest.left); 
         move_y = (move_y - dest.top); 



         if(java.lang.Math.round(mScaleFactor) > 2) { 
          move_x += (scale_cur_x * riz_scale); 
          move_y += (scale_cur_y * riz_scale); 
         } else { 
          move_x += (scale_cur_x); 
          move_y += (scale_cur_y); 
         } 

         move_x /= java.lang.Math.round(mScaleFactor); 
         move_y /= java.lang.Math.round(mScaleFactor); 

         move_x *= scale; 
         move_y *= scale; 

         //Log.e(Codistan_Tag, "Codistan Move: " + String.valueOf(move_x) + ", " + String.valueOf(move_y)); 

         if (move_x >= 0 && move_y >= 0) { 
          if (!isSelectionToolEnabled && isDistortionEnabled) { 
           warpPhotoFromC(image, height, width, max_dist/mScaleFactor, orig_x, orig_y, move_x, move_y); 
           first++; 
           distortedBmp.setPixels(image, 0, width, 0, 0, width, height); 
           fg = false; 
          } else { 
           //Cut Tool Enabled 
           distortedBmp.setPixels(image, 0, width, 0, 0, width, height); 
           MovementStack.add(new Pair((int) move_x, (int) move_y)); 
          } 
         } 
        } 
        orig_x = move_x; 
        orig_y = move_y; 
        break; 
       case MotionEvent.ACTION_UP: 
        if (isSelectionToolEnabled) 
         isDrawFinished = true; 
        break; 
      } 
     } 
     v.invalidate(); 
    } 
    return true; 
} 

erhöhen

Answer 1

bekam ich meine Lösung, dies zu 2

orig_x = event.getX()/2; 
orig_y = event.getY()/2; 

Answer 2

Wenn Sie die Werte "fromXDelta" und "fromYDelta" des Bildes, das gezoomt werden soll, codieren können, probieren Sie es aus. Der Wert ist jeweils 50%.