在單個視圖組中縮放兩個視圖android

-1

我正在做一個項目，其中需要使用縮放選項的單個佈局中的兩個圖像視圖。 AFAIK android允許一個視圖輕鬆進行縮放。但我的問題不是那樣的。我有兩個圖像瀏覽。我試圖在框架佈局中做到這一點。但結果並不好。當圖像超出佈局範圍並且縮放不太平滑時，圖像會縮小。我試圖用棄絕的絕對佈局來做。但它不起作用歡迎您提供所有建議。在單個視圖組中縮放兩個視圖android

我的代碼是在這裏

int x = (int)event.getRawX(); 
    int y = (int)event.getRawY(); 
     ImageView view = (ImageView) v; 

     switch (event.getAction() & MotionEvent.ACTION_MASK) { 
      case MotionEvent.ACTION_DOWN: 
      savedMatrix.set(matrix); 
      start.set(event.getX(), event.getY()); 

      mode = DRAG; 
      hoffset = x - v.getLeft(); 
     voffset = y - v.getTop(); 
      break; 
      case MotionEvent.ACTION_POINTER_DOWN: 
      oldDist = spacing(event); 
      Log.d(TAG, "oldDist=" + oldDist); 
      if (oldDist > 10f) { 
       savedMatrix.set(matrix); 
       midPoint(mid, event); 
       mode = ZOOM; 
       Log.d(TAG, "mode=ZOOM"); 
      } 
      break; 
      case MotionEvent.ACTION_UP: 
      // moveView(v, x - hoffset, y - voffset); 
      case MotionEvent.ACTION_POINTER_UP: 
      mode = NONE; 

      Log.d(TAG, "mode=NONE"); 
      break; 
      case MotionEvent.ACTION_MOVE: 
      if (mode == DRAG) { 
       moveView(v, x - hoffset, y - voffset); 
       hrecent = x; 
       vrecent = y; 
      } 
      else if (mode == ZOOM) { 


       newDist = spacing(event); 
       if (newDist > 10f) { 

        matrix.set(savedMatrix); 

        float scale = newDist/oldDist; 
     matrix.postScale(ScaleFactorForZoom, ScaleFactorForZoom, mid.x, mid.y); 



       float delta =10.0f+ (newDist -oldDist)/oldDist; 
      // view.setImageMatrix(matrix);  
       float newHeight; 
       float newWidth; 


     newHeight=(float) ((delta)+view.getHeight()); 
     newWidth=(float) ((delta)+view.getWidth()); 

        oldDist = newDist; 



       zoomView(view, newWidth, newHeight); 

       } 
      } 
      break; 
      } 



      return true; 
    }

的MoveView功能是

 public void moveView(View v, int x, int y) 
     { 
     ViewGroup.LayoutParams params = v.getLayoutParams(); 
     if (params instanceof FrameLayout.LayoutParams) 
     { 
      FrameLayout.LayoutParams par = (FrameLayout.LayoutParams)params; 
      View parent = (View)(v.getParent()); 
      x = Math.min(x, parent.getWidth()); 
      x = Math.max(x, 0); 
      y = Math.min(y, parent.getHeight()); 
      y = Math.max(y, 0); 


      par.leftMargin=x; 
      par.topMargin=y; 
      v.setLayoutParams(par); 
     } 
    }

變焦功能在這裏

public void zoomView(View v, float width, float height) 
    { 
     ViewGroup.LayoutParams params = v.getLayoutParams(); 
     if (params instanceof FrameLayout.LayoutParams) 
     { 
      FrameLayout.LayoutParams par = (FrameLayout.LayoutParams)params; 
      par.width = (int)width; 
      par.height = (int)height; 

      v.setLayoutParams(par); 


     } 
    }

來源

2011-12-06 Juliousraj

我做到了，通過將上述框架佈局的兩個圖像視圖和爲Frame Layout編寫觸摸事件，並將兩個按鈕用於選擇視圖以縮放和設置該ima的矩陣ge

來源

2011-12-15 04:47:23 Juliousraj

如果發現請發佈完整的解決方案。這對某人會有所幫助。 –

您不應該使用par.width =（int）寬度，因爲小數部分總是默認被故障截斷，改爲使用par.width = Math.round（Width）並考慮要恢復的機制有時默認值。

來源

2014-05-05 13:36:00 user3604489

在單個視圖組中縮放兩個視圖android

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