android RelativeLayout以编程方式更改高度

Question

我尝试以编程方式更改布局高度.我有两个按钮.在一个按钮中我改变了我的布局位置和第二个按钮我尝试接收保存位置,这是我第一次.

<RelativeLayout
    android:id="@+id/popaplayout"
    android:layout_width="fill_parent"
    android:layout_height="200dp" >

这是我的布局和我写的第一个按钮

RelativeLayout.LayoutParams parms = new RelativeLayout.LayoutParams(
                    RelativeLayout.LayoutParams.FILL_PARENT,
                    RelativeLayout.LayoutParams.FILL_PARENT);
parms.addRule(RelativeLayout.BELOW, R.id.movies_title_layout);
scrollpopap.setLayoutParams(parms);
scrollpopap.setScrollingEnabled(true);

和第二个按钮

RelativeLayout.LayoutParams rel_btn = new RelativeLayout.LayoutParams(
                    ViewGroup.LayoutParams.WRAP_CONTENT, 300);
rel_btn.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
scrollpopap.setLayoutParams(rel_btn);
scrollpopap.setScrollingEnabled(false);

在xml文件中我写了高度200dp和编程300,并有不同的高度.我怎样才能以编程方式编写保存高度？

如果有人知道解决方案,请帮助我谢谢

Answer 1

首先将200 dp转换为像素 -

final float scale = getContext().getResources().getDisplayMetrics().density;
int pixels = (int) (200 * scale + 0.5f);

然后以编程方式设置,

RelativeLayout.LayoutParams rel_btn = new RelativeLayout.LayoutParams(
                    ViewGroup.LayoutParams.WRAP_CONTENT, pixels);
            rel_btn.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
            scrollpopap.setLayoutParams(rel_btn);
            scrollpopap.setScrollingEnabled(false);

Answer 2

像这样将DP转换为PX.

final float scale = getContext().getResources().getDisplayMetrics().density;
int px = (int) (100 * scale + 0.5f);  // replace 100 with your dimensions

设置相对布局的一些layout_gravity.并通过java代码更改高度和宽度.

RelativeLayout rl = (RelativeLayout) findViewById(R.id.yourId);
rl.getLayoutParams().height = px;  
rl.getLayoutParams().width = px;

Answer 3

如果您打算更改RelativeLayout高度，那么这会有所帮助。

RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.yourId);
relativeLayout.getLayoutParams().height = 100;
relativeLayout.getLayoutParams().width = 100;

Answer 4

用这个

RelativeLayout layout = (RelativeLayout) findViewById(R.id.yourlayout_id);
// Gets the layout params that will allow you to resize the layout
LayoutParams params = layout.getLayoutParams();
params.height = 320;
params.width = 320;