在android中动态改变ImageView的位置

Question

我需要动态

更改 ImageView 的位置，并使用以下代码，

int x=100,y=100;
RelativeLayout.LayoutParams mparam = new RelativeLayout.LayoutParams((int)(LayoutParams.FILL_PARENT),(int)(LayoutParams.FILL_PARENT));
    mparam.topMargin=x;
    mparam.leftMargin=y;
    ball.setLayoutParams(mparam);
    x+=100;
    y+=100;

但我没有得到任何更改。

是否可以？以及如何？

Answer 1

您更改了保证金，但没有更改其位置，这似乎不是一个好的解决方案。
尝试使用方法 View.layout(int, int, int, int)
文档 说：

public void layout (int l, int t, int r, int b)

Since: API Level 1
Assign a size and position to a view and all of its descendants
This is the second phase of the layout mechanism. (The first is measuring). 
In this phase, each parent calls layout on all of its children to position them. 
This is typically done using the child measurements that were stored in 
the measure pass(). Derived classes should not override this method. Derived 
classes with children should override onLayout. In that method, they should call 
layout on each of their children.

Parameters

l   Left position, relative to parent
t   Top position, relative to parent
r   Right position, relative to parent
b   Bottom position, relative to parent

Answer 2

您可以在视图上调用 setPadding。因此，在您的代码中（顺便说一下，您应该放入代码块！），只需添加对此方法的调用：

int x=100,y=100; 
LayoutParams mparam = new LayoutParams((int)(LayoutParams.FILL_PARENT),(int) (LayoutParams.FILL_PARENT));
ball.setLayoutParams(mparam); 
ball.setPadding(x,y,0,0);

x+=100; y+=100;
ball.setPadding(x,y,0,0);