android动态加载布局文件示例

<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:paddingbottom="@dimen/activity_vertical_margin"
    android:paddingleft="@dimen/activity_horizontal_margin"
    android:paddingright="@dimen/activity_horizontal_margin"
    android:paddingtop="@dimen/activity_vertical_margin"
    tools:context=".mainactivity" >
    <button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margintop="64dp"
        android:text="添加" />
    <edittext
        android:id="@+id/edittext1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10" >
        <requestfocus />
    </edittext>
</relativelayout>

package com.example.codeui;
import android.os.bundle;
import android.app.activity;
import android.content.context;
import android.view.layoutinflater;
import android.view.menu;
import android.view.view;
import android.view.viewgroup;
import android.widget.linearlayout;
import android.widget.textview;
public class mainactivity extends activity {
    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        linearlayout layout=new linearlayout(this);
        layout.setorientation(linearlayout.vertical);//显示方向
        //将view对象添加到布局界面
        textview textview =new textview(this);
        textview.settext("hello code ui");
        viewgroup.layoutparams params = new viewgroup.layoutparams(
                viewgroup.layoutparams.fill_parent,viewgroup.layoutparams.wrap_content);
        //添加
        layout.addview(textview,params);
        //添加外部xml定义的布局
        view view = getpartview();
        layout.addview(view);  
        viewgroup.layoutparams layoutparams = new viewgroup.layoutparams(
                viewgroup.layoutparams.fill_parent,viewgroup.layoutparams.fill_parent);
        setcontentview(layout, layoutparams);
        //setcontentview(r.layout.activity_main);
        //采用代码编写效率高，但是很难维护
    }
    //通过加载xml文件将view添加到布局中
    public view getpartview() {
        //将xml布局文件生成view对象通过layoutinflater
        layoutinflater inflater =(layoutinflater)getsystemservice(context.layout_inflater_service);
        //将view对象挂载到那个父元素上，这里没有就为null
        return inflater.inflate(r.layout.part, null);
    }
    @override
    public boolean oncreateoptionsmenu(menu menu) {
        getmenuinflater().inflate(r.menu.main, menu);
        return true;
    }
}