如何让Android的布局的底部？ [英] how to get the bottom of a layout in android?

问题描述

我在Android中使用相对布局，并添加视图到屏幕底部视图时比屏幕的实际底部，用户倾斜actualy看到它放在低。

I'm using a relative layout in Android, and when adding a view to the bottom of the screen the view is placed lower than the actual bottom of the screen, where the user cant actualy see it.

view.setY(container.getBottom()-view.getHeight());
container.addView(view);    

容器是一个RelativeLayout的。我也尝试过用container.getHeight（），它给了我同样的结果，和所有其他的解决方案，我发现在这里使用的XML文件，它不工作对我来说，因为我需要动态地添加视图上面的随机位置屏幕下方，这意味着

container is a RelativeLayout. i have also tried to use container.getHeight() which gave me the same result, and all the other solutions i found where using the xml file, which doesnt work for me since i need to add the view dynamically in a random position above the bottom of the screen, meaning

view.setY(container.getHeight()-Common.random.nextFloat()*100-view.getHieght());

这是XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/layout"
    tools:context="il.co.ovalley.dashvsponypolice.app.MainActivity">
</RelativeLayout>

和查看IM尝试添加：

public class GameView extends ImageView{
  public GameView(RelativeLayout container) {
      super(container.getContext());
      m_container=container;
      container.addView(this);
  }
}

public class Cop extends GameView {
  public Cop(RelativeLayout container) {
    super(container);
    m_isShooting=false;
    m_LoadingTime=10;
    m_isLoading=false;
    m_xSpeed=1.5f;
    setY(container.getHeight()-Common.random.nextFloat()*100-getHeight()/*-getPaddingBottom()*/);
    float x=(Common.random.nextFloat()*m_container.getWidth());
    setX(x);
    drwableState=0;
    changeDirection();
 }

我已经测试了不同版本的Andr​​oid和屏幕尺寸，得到了相同的结果。到目前为止，我发现这是减去容器的高度，这似乎确定一个设备和最好的希望他人在任意INT唯一的解决办法，我敢肯定有一个更好的解决方案。

I have tested that on different versions of android and screen sizes and got the same result. so far, the only solution I found was subtracting an arbitrary int from the container's height which seems ok on one device and hope for the best for the others, I'm sure there is a better solution.

结果日Thnx

推荐答案

为什么你不只是把屏幕底部的观点与 ALIGN_PARENT_BOTTOM ，然后申请一个随机填充？

Why don't you just place the view at the bottom of the screen with ALIGN_PARENT_BOTTOM and then apply a random padding?

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

view.setPadding(0, 0, 0, randomValue);  // left, top, right, bottom

container.addView(view, params);

这一切与计算 view.getHeight（）是不好的。做这样的工作，您无需任何管理那你自己。

All this calculating with the view.getHeight() is not good. Doing it like this works without you having to manage any of that yourself.

这篇关于如何让Android的布局的底部？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！