动态改变布局

来源：互联网发布：python 显示字符集编辑：程序博客网时间：2024/06/06 22:39

1.布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:orientation="vertical" >    <android.support.v4.view.ViewPager            android:id="@+id/id_guide_viewpager"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:layout_gravity="center"            android:flipInterval="30"            android:persistentDrawingCache="animation" />    <FrameLayout            android:id="@+id/dot_frame"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            android:layout_centerHorizontal="true"            android:gravity="center"            android:layout_marginBottom="16.0dip">        <LinearLayout                android:id="@+id/dot_contain"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:gravity="center"                android:orientation="horizontal" >        </LinearLayout>        <ImageView                android:id="@+id/cur_dot"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:src="@drawable/dot2_w" />    </FrameLayout>    <ImageView            android:id="@+id/open"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentTop="true"            android:layout_alignParentRight="true"            android:clickable="true"            android:src="@drawable/ic_open"            android:visibility="gone" /></RelativeLayout>

讲FrameLayout设置为靠近父控件底部，并水平居中，距离底部距离（bottomMargin）

 public void setDotAlignBottom(int px){       View m_obj_view = LayoutInflater.from(context).inflate(R.layout.guide,null);       FrameLayout dot_frame = (FrameLayout) m_obj_view.findViewById(R.id.dot_frame);       /*****因为FrameLayout的父布局是RelativeLayout 所以类型为 RelativeLayout.LayoutParams****/       RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(dot_frame.getLayoutParams());       /****设置布局位置****/       layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);       layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);       layoutParams.bottomMargin = px;//or  layoutParams.setMargins(0,0,0,px);       dot_frame.setLayoutParams(layoutParams);   }

代码很简单，不多做介绍；

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