如何以编程方式在Android FrameLayout中对齐ImageButton

Question

我的应用程序的布局是FrameLayout。我想将ImageButton对齐到framelayout的右上角。我尝试下面的代码没有用。

    mImageButton = new ImageButton(mContext);
    LayoutParams ll = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT );
    ll.gravity = Gravity.RIGHT;
    mImageButton.setLayoutParams(ll);
    mImageButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_menu_moreoverflow_normal_holo_light));
    this.addView(mImageButton);

预期输出

Answer 1

我认为您应该将LayoutParams的构造代码更改为：

LayoutParams ll = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.gravity = Gravity.TOP | Gravity.RIGHT;

在您的代码中，您将layout_width和layout_height值设置为MATCH_PARENT，因此您的ImageView将填充所有父级FrameLayout。

Answer 2

我认为您需要在布局参数中提供高度宽度。因为使用match_parent，它将占用父级的宽度和高度，或者您可以使用WRAP_CONTENT。

 mImageButton = new ImageButton(mContext);
LayoutParams ll = new LayoutParams(width,height);
ll.gravity = Gravity.RIGHT | Gravity.TOP;
mImageButton.setLayoutParams(ll);
mImageButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_menu_moreoverflow_normal_holo_light));
this.addView(mImageButton);

Answer 3

试试这个，

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

params.gravity = Gravity.TOP | Gravity.RIGHT;

mImageButton.setLayoutParams(params);