Question

我在活动中有多个图片视图。我想添加触摸，放大，缩小，旋转图像视图。我正在尝试这个，但我只得到一个图像视图将移动，旋转，缩放。其他图像不接触。我怎样才能做到这一点。任何人都可以告诉我。

Main.class


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.images);


 image=(ImageView)findViewById(R.id.imageView1);
 image1=(ImageView)findViewById(R.id.imageView2);

 image.setOnTouchListener(new Touchhimage());
 image1.setOnTouchListener(new Touchhimage());

 }



 Touchhimage.class:


 public class Touchhimage implements OnTouchListener {  

 // These matrices will be used to move and zoom image  
public static Matrix matrix = new Matrix();  
public static Matrix savedMatrix = new Matrix();  

 // We can be in one of these 3 states  
 static final int NONE = 0;  
 static final int DRAG = 1;  
 static final int ZOOM = 2;  
 int mode = NONE;  

 // Remember some things for zooming  
 PointF start = new PointF();  
 PointF mid = new PointF();  
 float oldDist = 1f;  

 float[] lastEvent = null;
    float d = 0f;
    float newRot = 0f;  


    @Override  
 public boolean onTouch(View v, MotionEvent event) {  
  ImageView view = (ImageView) v;  
/*  double r = Math.atan2(event.getX() - view.getWidth() / 2, view.getHeight() / 2 - event.getY());
  int rotation = (int) Math.toDegrees(r);*/

  // Dump touch event to log  
  dumpEvent(event);  

  // Handle touch events here...  
  switch (event.getAction() & MotionEvent.ACTION_MASK) {  
  case MotionEvent.ACTION_DOWN:  
   savedMatrix.set(matrix);  
   start.set(event.getX(), event.getY());  
   mode = DRAG;  
   break;  
  case MotionEvent.ACTION_POINTER_DOWN:  
   oldDist = spacing(event);  
   if (oldDist > 10f) {  
    savedMatrix.set(matrix);  
    midPoint(mid, event);  
    mode = ZOOM;  


   }  
   lastEvent = new float[4];
   lastEvent[0] = event.getX(0);
   lastEvent[1] = event.getX(1);
   lastEvent[2] = event.getY(0);
   lastEvent[3] = event.getY(1);
   d = rotation(event);

   break;  
  case MotionEvent.ACTION_UP:  
  case MotionEvent.ACTION_POINTER_UP:  
      lastEvent = null;
   mode = NONE;  
   break;  
  case MotionEvent.ACTION_MOVE:  

   if (mode == DRAG) {  
    // ...      
    matrix.set(savedMatrix);  
    matrix.postTranslate(event.getX() - start.x, event.getY() - start.y);      
   } else if (mode == ZOOM) {  
    float newDist = spacing(event);  
    if (newDist > 10f) {  
     matrix.set(savedMatrix);  
     float scale = newDist / oldDist;  
     matrix.postScale(scale, scale, mid.x, mid.y);  
    }  
    if (lastEvent != null) {
        newRot = rotation(event);
        float r1 = newRot - d;
        matrix.postRotate(r1, view.getMeasuredWidth() / 2,
                view.getMeasuredHeight() / 2);
    }
   }  
   break;  
  }  

  view.setImageMatrix(matrix);  

 return true;

 // return false;


  // indicate event was handled  
 }  


 private float rotation(MotionEvent event) {
        double delta_x = (event.getX(0) - event.getX(1));
        double delta_y = (event.getY(0) - event.getY(1));
        double radians = Math.atan2(delta_y, delta_x);

        return (float) Math.toDegrees(radians);
    }

 /** Show an event in the LogCat view, for debugging */  
 @SuppressWarnings("deprecation")
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("]");  
 }  

 /** Determine the space between the first two fingers */  
 @SuppressLint("FloatMath") 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);  
 }  

 /** Calculate the mid point of the first two fingers */  
 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);  
 }  

 /**      rotation       **/
 float FindAngleDelta( float angle1, float angle2 )
 {
     float From = ClipAngleTo0_360( angle2 );
     float To   = ClipAngleTo0_360( angle1 );

     float Dist  = To - From;

     if ( Dist < -180.0f )
     {
         Dist += 360.0f;
     }
     else if ( Dist > 180.0f )
     {
         Dist -= 360.0f;
     }

     return Dist;
 }
 float ClipAngleTo0_360( float Angle )
 {
     float Res = Angle;
     while(Angle < 0) { Angle += 360.0; }
     while(Angle >= 360.0) { Angle -= 360.0; }
     return Res;
 }
}

Answer 1

因为在任何给定时间只有一个对象可以处理触摸事件，为什么不在整个屏幕上放置一个不可见的视图，让它管理触摸事件。它需要知道放置其他小部件的位置，并根据用户手势移动/旋转/缩放它们

Answer 2

这可能就是你要找的东西。 http://developer.android.com/training/gestures/multi.html

另外，尝试在OnTouch回调中返回false。

public boolean onTouch(View v, MotionEvent event) {
         // Your code here
            return false;
        }

这将阻止视图消耗触摸事件。

如何在android中的一个活动中移动多个图像

2 个答案: