android.widget.ImageView

方法：

(1)

public void setVisibility (int visibility)  //visibility:能见度,可见性

Added in API level 1

Set the enabled state of this view.      //激活的,可行的

Parameters

visibilityOne of VISIBLE, INVISIBLE, or GONE.关于参数:

VISIBLE:======>View类里面的一个常量:

public static final int VISIBLE

Added in API level 1

This view is visible. Use with setVisibility(int) and android:visibility.

Constant Value: 0 (0x00000000)

INVISIBLE:======>View类里面的一个常量:

public static final int INVISIBLE

Added in API level 1

This view is invisible, but it still takes up space for layout purposes. Use with setVisibility(int) and android:visibility.

Constant Value: 4 (0x00000004)

GONE:======>View类里面的一个常量:

public static final int GONE

Added in API level 1

This view is invisible, and it doesn't take any space for layout purposes. Use with setVisibility(int) and android:visibility.

Constant Value: 8 (0x00000008)