<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/activity_main"android:layout_width="match_parent"android:layout_height="match_parent"android:padding="3dp"tools:context="com.example.a3_.MainActivity"><Button android:id="@+id/change" android:text="切換布局" android:textSize="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content" /><ListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="match_parent"></ListView><GridView android:id="@+id/gv" android:numColumns="2" android:visibility="gone" android:layout_width="match_parent" android:layout_height="match_parent"></GridView></FrameLayout>

package com.example.a3_;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.GridView;import android.widget.ListView;public class MainActivity extends AppCompatActivity {private ListView lv;private GridView gv;private Button button;//設置默認的顯示或隱藏private boolean isLvShow = true;private boolean isGvShow = false;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化控件 lv = (ListView) findViewById(R.id.lv); gv = (GridView) findViewById(R.id.gv); button = (Button) findViewById(R.id.change); //設置適配器 lv.setAdapter(new MyAdapter()); gv.setAdapter(new MyAdapter()); //為按鈕設置點擊事件 button.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {   if (isLvShow){    lv.setVisibility(View.GONE);    gv.setVisibility(View.VISIBLE);   }else {    lv.setVisibility(View.VISIBLE);    gv.setVisibility(View.GONE);   }   //對顯示或隱藏進行取反   isLvShow = !isLvShow;   isGvShow = !isGvShow;  } });}class MyAdapter extends BaseAdapter{ @Override public int getCount() {  return 20; } @Override public Object getItem(int position) {  return null; } @Override public long getItemId(int position) {  return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) {  //為listview設置布局  if (convertView==null){   convertView = View.inflate(getApplicationContext(),R.layout.item,null);  }  return convertView; }}}