Android 以编程方式固定页面底部的相对布局

我已经创建了一个scrollView，其中包含我活动的所有布局。在scrollview内部，我创建了一个垂直方向的线性布局，在它内部，我创建了一些包含图像和文本视图的相对布局。我需要scrollview，因为在某些时刻，我可以在布局中有许多图像，屏幕需要滚动。 这没问题，一切正常。我的问题在后面。正如您在代码底部看到的，我创建了最后一个包含简单按钮的相对布局。我的问题是，这个布局并不停留在页面的底部，但它会相对于屏幕上下移动。因此，如果只有一个图像，例如，最后一个相对布局位于页面顶部，附加到图像。如果有许多图像，则位于页面底部。 我想做的是，最后一个相对布局始终保持在页面底部，如果屏幕中只有一个图像也是如此。 如何修改代码以实现目标

            //SCROLL VIEW
            ScrollView scrollView = new ScrollView(this); //create a new scrollView
            scrollView.setBackground(getResources().getDrawable(R.drawable.background)); //give the background gradient
            scrollView.setLayoutParams(new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT, //set the main params about the dynamic size of the scrollView
                                                         ScrollView.LayoutParams.MATCH_PARENT));
            scrollView.setPadding(0, 20, 0, 0);

            //LINEAR LAYOUT
            LinearLayout linearLayout = new LinearLayout(this); //create a new linearLayout
            linearLayout.setOrientation(LinearLayout.VERTICAL); //set the layout orientation
            linearLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT));

            for (i=0; i<= 3; i++) {

                //RELATIVE LAYOUT
                RelativeLayout relativeLayout = new RelativeLayout(this); //create a new relative layout
                relativeLayout.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, //set main params about the width and height
                        RelativeLayout.LayoutParams.FILL_PARENT));
                relativeLayout.setBackgroundColor(getResources().getColor(R.color.grayColor)); //set background color
                LinearLayout.LayoutParams relativeParams = new LinearLayout.LayoutParams(
                        new LinearLayout.LayoutParams(
                                LinearLayout.LayoutParams.MATCH_PARENT,
                                LinearLayout.LayoutParams.WRAP_CONTENT));
                relativeParams.setMargins(20, 20, 20, 0);
                relativeLayout.setLayoutParams(relativeParams); //set declared params about layout to the relativeLayout
                relativeLayout.requestLayout();

                //IMAGE VIEW
                ImageView selectedPhoto = new ImageView(this); //create a new imageView
                //imageView code here

                //TEXT VIEWS
                TextView numberCopies = new TextView(this); //create new TextView
                numberCopies.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT));
                numberCopies.setGravity(Gravity.CENTER); //set position to the center in confront to the parent
                                    RelativeLayout.LayoutParams layoutParamsNumberCopies = (RelativeLayout.LayoutParams) numberCopies.getLayoutParams();
                layoutParamsNumberCopies.addRule(RelativeLayout.CENTER_HORIZONTAL); //add a rule to the layout params. We put his position at the horizontal center of the relative layout
                numberCopies.setLayoutParams(layoutParamsNumberCopies); //set the layout rules to the textView

                TextView priceCopies = new TextView(this);
                priceCopies.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT));
                priceCopies.setGravity(Gravity.CENTER);
                numberCopies.setPadding(25, 25, 25, 25);
                priceCopies.setTextColor(getResources().getColor(R.color.redColor));

               RelativeLayout.LayoutParams layoutParamsPriceCopies = (RelativeLayout.LayoutParams) priceCopies.getLayoutParams();
                layoutParamsPriceCopies.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                layoutParamsPriceCopies.addRule(RelativeLayout.CENTER_VERTICAL);
                priceCopies.setLayoutParams(layoutParamsPriceCopies);

                relativeLayout.addView(selectedPhoto);
                relativeLayout.addView(numberCopies);
                relativeLayout.addView(priceCopies);
                linearLayout.addView(relativeLayout);
            }

            //RELATIVE LAYOUT
            RelativeLayout relativeLayoutOpenButton = new RelativeLayout(this); //create a new relative layout for add the main buttons
            relativeLayoutOpenButton.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, //add the params for the width and height
                    RelativeLayout.LayoutParams.WRAP_CONTENT));
            relativeLayoutOpenButton.setBackgroundColor(getResources().getColor(R.color.blackColor)); //set the black background
            relativeLayoutOpenButton.setPadding(10, 10, 10, 10); //set the padding
            LinearLayout.LayoutParams relativeParamsOpenButton = new LinearLayout.LayoutParams(
                    new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.MATCH_PARENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT));
            relativeParamsOpenButton.setMargins(0, 20, 0, 0); //put a top margin for separate the black bar from the last image line
            relativeParamsOpenButton.gravity = Gravity.BOTTOM; //set the gravity to the bottom
            relativeLayoutOpenButton.setLayoutParams(relativeParamsOpenButton);
            relativeLayoutOpenButton.requestLayout();

            Button confirmButton = new Button(this); //create a new button
            //code button here
            relativeLayoutOpenButton.addView(confirmButton); //add the button to the view

            scrollView.addView(linearLayout);
            setContentView(scrollView);
        }

//滚动视图
ScrollView ScrollView=新的ScrollView（此）//创建一个新的滚动视图
setBackground（getResources（）.getDrawable（R.drawable.background））//给背景渐变色
scrollView.setLayoutParams（新的scrollView.LayoutParams（scrollView.LayoutParams.MATCH_父项）//设置有关scrollView动态大小的主参数
ScrollView.LayoutParams.MATCH_PARENT）；
设置填充（0,20,0,0）；
//线性布局
LinearLayout LinearLayout=新的LinearLayout（本）//创建新的线性布局
linearLayout.setOrientation（linearLayout.VERTICAL）//设置布局方向
linearLayout.setLayoutParams（新的linearLayout.LayoutParams（linearLayout.LayoutParams.MATCH_父级，
LinearLayout.LayoutParams.WRAP_内容）；
对于（i=0；i您可以有一个相对布局，在它里面您应该将您的scrollview和button.botton放在底部，scrollview放在相对布局的顶部。如果您这样做，您将始终将按钮放在屏幕底部

<RelativeLayout>
<ScrollView> <!--set scrollview in top of relativelayout and top of button -->
<LinearLayout>
.
.
.
</LinearLayout>
</ScrollView>

<Button/> <!--set button in buttom of relativelayout-->
</RelativeLayout>


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很抱歉，我没有正确理解。请您解释清楚好吗？您应该在主布局中有一个RelativeLayout，然后将您的scrollview和按钮放在您想要的位置。您应该将按钮放在scrollview的外部和该RelativeLayout和buttom的内部