小编Tom*_*mmy的帖子

层次结构如下:

• 的RelativeLayout
  • LinearLayout(垂直)
    • FrameLayout(重量5)
      • ImageView的
    • 查看(重量1)

视图只是用于间距目的的虚拟视图.我在布局xml中做了它,它的工作原理.但是当我想以编程方式执行此操作时,以下代码不起作用.

LinearLayout LL = new LinearLayout(this);
ImageView ladder = new ImageView(this);
FrameLayout ladderFL = new FrameLayout(this);
View dummyView = new View(this);
ladder.setImageResource(R.drawable.ladder1);
LL.setOrientation(LinearLayout.VERTICAL);
LayoutParams LLParams = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
LinearLayout.LayoutParams ladderFLParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, 0);
ladderFLParams.weight = 5f;
LinearLayout.LayoutParams dummyParams = new LinearLayout.LayoutParams(0,0);
dummyParams.weight = 1f;

FrameLayout.LayoutParams ladderParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT, Gravity.BOTTOM);
ladder.setLayoutParams(ladderParams);
ladderFL.setLayoutParams(ladderFLParams);
dummyView.setLayoutParams(dummyParams);
LL.setWeightSum(6f);
LL.setLayoutParams(LLParams);

ladderFL.addView(ladder);
LL.addView(ladderFL);
LL.addView(dummyView);
((RelativeLayout) findViewById(R.id.screenRL)).addView(LL);

我是android新手,我正在使用线性布局.我想放置一个占据屏幕20%的图像.这是代码,但这不起作用.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/sky" >

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="2" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:src="@drawable/schoolroad" />

</RelativeLayout>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="8" >
</RelativeLayout>

</LinearLayout>

结果是左侧布局占据了屏幕的80%.

我的代码出了什么问题？