我一直在四处寻找解决方案,但我读得越多,我就开始感到困惑。我从一个名为 Restaurant.java 的主类开始,在主页上我有 3 个按钮,它们是 Foods、Beverages、Bill。当我单击食物按钮时,我试图显示 food.xml 的视图,查看带有饮料按钮的饮料。我为食物类创建了 Foods.java。
我的主要目的是单击主页上的显示 3 个按钮之一和食物页面(foods.xml),然后单击foods.xml 上的后退按钮返回主页。食物部分工作正常,但我的饮料和账单页面失败,尽管它们的代码大致相似。(我得到了没有检测到 GPU 仿真的模拟器。)我是 android 的新手,我一直在努力了解实际的 android 概念。我一直在阅读Beginning android 3 book来学习android。
我的主要课程---RESTAURANT.JAVA
package com.restaurant.first;
import com.restaurant.first.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Restaurant extends Activity implements OnClickListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View foodButton =(View)findViewById(R.id.foods);
View beveragesButton =(View)findViewById(R.id.beverages);
View billButton =(View)findViewById(R.id.bill);
foodButton.setOnClickListener(this);
beveragesButton.setOnClickListener(this);
billButton.setOnClickListener(this);
}
public void onClick(View view)
{
switch (view.getId())
{
case R.id.foods: Intent foods = new Intent(this, Foods.class);
startActivity(foods);
break;
case R.id.beverages:Intent beverages = new Intent(this, Beverages.class);
startActivity(beverages);
break;
case R.id.bill: Intent bill = new Intent(this, Bill.class);
startActivity(bill);
break;
}
}
}
我的美食课
package com.restaurant.first;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Foods extends Activity implements OnClickListener{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.foods);
View backButton =(View)findViewById(R.id.backButton);
backButton.setOnClickListener(this);
}
public void onClick(View view)
{
switch (view.getId())
{
case R.id.backButton: Intent menu = new Intent(this, Restaurant.class);
startActivity(menu);
break;
}
}
}
饮料.JAVA
package com.restaurant.first;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Beverages extends Activity implements OnClickListener{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.beverages);
View backButton =(View)findViewById(R.id.backButton);
backButton.setOnClickListener(this);
}
public void onClick(View view)
{
switch (view.getId())
{
case R.id.backButton: Intent menu = new Intent(this, Restaurant.class);
startActivity(menu);
break;
}
}
}