Android 拖动自定义图像视图并实现触摸侦听器
我有一个扩展ImageView类的CustomImageView类。现在我有了另一个片段类,我在其中显示这个customimageview。基本上,我想添加一个CustomImageView并在其上实现拖放操作 我可以添加自定义图像,但图像无法控制 下面是我的onTouch代码 @凌驾 公共布尔onTouchView v,MotionEvent事件 { CustomImageView视图=CustomImageView v; DumpEvent事件Android 拖动自定义图像视图并实现触摸侦听器,android,Android,我有一个扩展ImageView类的CustomImageView类。现在我有了另一个片段类,我在其中显示这个customimageview。基本上,我想添加一个CustomImageView并在其上实现拖放操作 我可以添加自定义图像,但图像无法控制 下面是我的onTouch代码 @凌驾 公共布尔onTouchView v,MotionEvent事件 { CustomImageView视图=CustomImageView v; DumpEvent事件 // Handle touch events
// Handle touch events here...
switch (event.getAction() & MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_DOWN:
System.out.println("ACTION_DOWN");
savedMatrix.set(matrix);
start.set(event.getX(), event.getY());
mode = DRAG;
break;
case MotionEvent.ACTION_UP:
System.out.println("ACTION_UP");
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
case MotionEvent.ACTION_POINTER_DOWN:
System.out.println("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_MOVE:
if (mode == DRAG)
{
System.out.println("ACTION_MOVe inside DRAG");
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - start.x,
event.getY() - start.y);
}
else if (mode == ZOOM) {
System.out.println("ACTION_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 && event.getPointerCount() == 3)
{
newRot = rotation(event);
float r = newRot - d;
float[] values = new float[9];
matrix.getValues(values);
float tx = values[2];
float ty = values[5];
float sx = values[0];
float xc = (view.getWidth() / 2) * sx;
float yc = (view.getHeight() / 2) * sx;
matrix.postRotate(r, tx + xc, ty + yc);
}
}
break;
}
view.setImageMatrix(matrix);
return true; // indicate event was handled
}
}