android阴影大小,androiddragshadowbuilder阴影大小

嗯,这在文档中并不是那么清楚.我正在使用给定的构建器来减小大小,你只需要通过乘以你的条件来改变除法;

private static class MyDragShadowBuilder extends View.DragShadowBuilder {

private Point mScaleFactor;

// Defines the constructor for myDragShadowBuilder

public MyDragShadowBuilder(View v) {

// Stores the View parameter passed to myDragShadowBuilder.

super(v);

}

// Defines a callback that sends the drag shadow dimensions and touch point back to the

// system.

&＃64;Override

public void onProvideShadowMetrics (Point size, Point touch) {

// Defines local variables

int width;

int height;

// Sets the width of the shadow to half the width of the original View

width &＃61; getView().getWidth() / 2;

// Sets the height of the shadow to half the height of the original View

height &＃61; getView().getHeight() / 2;

// Sets the size parameter&＃39;s width and height values. These get back to the system

// through the size parameter.

size.set(width, height);

// Sets size parameter to member that will be used for scaling shadow image.

mScaleFactor &＃61; size;

// Sets the touch point&＃39;s position to be in the middle of the drag shadow

touch.set(width / 2, height / 2);

}

&＃64;Override

public void onDrawShadow(Canvas canvas) {

// Draws the ColorDrawable in the Canvas passed in from the system.

canvas.scale(mScaleFactor.x/(float)getView().getWidth(), mScaleFactor.y/(float)getView().getHeight());

getView().draw(canvas);

}

}