查找

想实现的是：第一个界面搜索(SearchActivity.java)--->第二个界面搜索结果(SearchShowActivity.java)---->第三个界面点击界面2中的搜索结果后显示详细信息(LookUpMenuActivity.java)。其中，第3个界面也会用于查看功能中。第三个界面就是对于菜品详细信息的显示。

1.对应的.xml：

1.1search_activity.xml：

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

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#666666"
android:orientation="horizontal" >

<Button
android:id="@+id/sscp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="搜索菜谱" >
</Button>

<Button
android:id="@+id/ckcp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_weight="1"
android:text="查看菜谱" />

<Button
android:id="@+id/tjcp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="添加菜谱" />
</LinearLayout>

<EditText
android:id="@+id/editText1"
android:layout_width="230dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/linearLayout1"
android:layout_marginLeft="25dp"
android:layout_marginTop="117dp"
android:ems="10" />

<Button
android:id="@+id/search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editText1"
android:layout_alignBottom="@+id/editText1"
android:layout_toRightOf="@+id/editText1"
android:text="搜索" />

</RelativeLayout>

1.2searchmenu_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/hua">
<ListView
android:id="@+id/listView2_search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
>
</ListView>

</LinearLayout>


1.3 lookupmenu_activity.java
<ScrollView 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:background="@drawable/hua"
>

<RelativeLayout
android:id="@+id/mymenu"
android:layout_width="fill_parent"
android:layout_height="163dp" >

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#666666"
android:orientation="horizontal" >

<Button
android:id="@+id/sscp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="搜索菜谱" >
</Button>

<Button
android:id="@+id/ckcp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_weight="1"
android:text="查看菜谱" />

<Button
android:id="@+id/tjcp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="添加菜谱" />
</LinearLayout>

<TextView
android:id="@+id/cming"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/linearLayout1"
android:layout_marginLeft="21dp"
android:layout_marginTop="30dp"

android:text="菜名:"
android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
android:id="@+id/show_name_t"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/linearLayout1"
android:layout_toRightOf="@+id/cming"
android:layout_marginLeft="40dp"
android:layout_marginTop="35dp"
android:textAppearance="?android:attr/textAppearanceLarge"
/>

<TextView
android:id="@+id/cxi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="21dp"
android:layout_below="@+id/cming"
android:layout_marginTop="20dp"
android:text="菜系:"
android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
android:id="@+id/show_classification_t"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/show_name_t"
android:layout_toRightOf="@+id/cxi"
android:layout_marginLeft="40dp"
android:layout_marginTop="35dp"
android:textAppearance="?android:attr/textAppearanceLarge"
/>

<TextView
android:id="@+id/prenfangfa"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="21dp"
android:layout_below="@+id/cxi"
android:layout_marginTop="20dp"
android:text="烹饪方法:"
android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
android:id="@+id/show_describe_t"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/prenfangfa"
android:layout_marginLeft="20dp"
android:textAppearance="?android:attr/textAppearanceLarge"
/>

</RelativeLayout>
</ScrollView>

2.注意：在searchmenu_activity.xml中，定义了：
<ListView

         android:id="@+id/listView2_search"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:layout_marginLeft="20dp"

         android:layout_marginRight="20dp"

         >

      </ListView>    

这个listView会用来显示查找出来的结果。需要定义一个list_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TableLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableRow
android:id="@+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/name"
android:layout_width="100dp"
android:layout_height="20dip"
android:gravity="center"
android:textStyle="bold|italic"
android:textColor="#312080"
android:layout_weight="1"
/>
<TextView
android:id="@+id/classification"
android:layout_width="180dp"
android:layout_height="20dip"
android:padding="3dip"
android:textStyle="bold|italic"
android:textColor="#312080"
android:layout_weight="1"
/>

</TableRow>
</TableLayout>

</LinearLayout>

这段代码用来表示刚刚那个listView中显示什么东西。也放在layout下。这里只是让它显示菜名和菜系。
3.3个相应的activity:

3.1SearchActivity.java:用于实现搜索功能：

package com.androidhomework.caipu;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class SearchActivity extends Activity{

protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.search_activity);

//当点击屏幕上的“搜索键的时候”，Button对象的btnsearch被建立，然后对它进行监听
Button btnsearch = (Button)findViewById(R.id.search); // 点击桌面上方的“搜索”键
btnsearch.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {

//定义i
d15a
d属性，foodname,classification,describe
int num = 0; //id
String foodname = null; //foodname
String classification = null; //classification
String describe = null; //describe
// TODO Auto-generated method stub

//editText1定义的是搜索的输入栏，当在输入栏内操作时，就是下面这句
EditText editText = (EditText) findViewById(R.id.editText1); //搜索的那个输入栏
String name = editText.getText().toString(); //这句用来取输入的结果
DBFoodService foods = new DBFoodService(SearchActivity.this); //我的是DBFoodService,建立一个foods的实体
ArrayList<DBFood> list = foods.queryAll(); //queryAll是“查看所有” 建立一个ArrayList叫做list，里面存放的是DBFood类型的数据
ArrayList<HashMap<String,Object>> data = new ArrayList<HashMap<String,Object>>(); //建立一个ArrayList叫做data，存放的是HashMap类型的数据

////////////////////
//如果提供的名字跟已有菜谱的名字相同
for(DBFood food:list){
food.getFoodName().toString(); //取值。
/*if(name.equals(food.getFoodName().toString())){
HashMap<String,Object> foodh = new HashMap<String,Object>();
foodh.put("num", food.getId());
foodh.put("foodName", food.getFoodName());
foodh.put("foodClassification", food.getFoodClassification());
foodh.put("describe", food.getDescribe());
data.add(foodh);
num = food.getId();
foodname = food.getFoodName();
classification = food.getFoodClassification();
describe = food.getDescribe();
break;
}*/

if(name.equals(food.getFoodName().toString())){ //如果输入的name值与food中取到的值相等，将对应的id,foodname,foodclassification,describe返回。
num = food.getId();
foodname = food.getFoodName();
classification = food.getFoodClassification();
describe = food.getDescribe();
break;
}
/*if(name.equals(food.getFoodClassification().toString())){
num = food.getId();
foodname = food.getFoodName();
classification = food.getFoodClassification();
describe = food.getDescribe();
break;
}*/

}
DBFood food1 = new DBFood(); //新建的DBFood类型的food1将刚刚的值传入。
food1.setId(num);
food1.setFoodName(foodname);
food1.setFoodClassification(classification);
food1.setDescribe(describe);

//如果输入的是菜谱种类
/*for(Food food:list){
food.getFoodName().toString();
if(name.equals(food.getFoodClassification().toString())){
HashMap<String,Object> foodh = new HashMap<String,Object>();
foodh.put("num", food.getId());
foodh.put("foodName", food.getFoodName());
foodh.put("foodClassification", food.getFoodClassification());
foodh.put("describe", food.getDescribe());
data.add(foodh);
}
}*/

/*SimpleAdapter adapter = new SimpleAdapter(SearchActivity.this,data,R.layout.item //SimpleAdapter:适配器
,new String[]{"foodName","foodClassification"}
,new int[]{R.id.name,R.id.classification});
listView = (ListView) findViewById(R.id.listView2_search); //listView2_search是显示搜索结果的listview
//listView.setTextFilterEnabled(true);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> adapterView, View view,
int position, long id) {
// TODO Auto-generated method stub
HashMap<String,Object> itemMap = (HashMap<String, Object>) adapterView.getItemAtPosition(position);
//int num = (Integer) itemMap.get("id");
String foodName = (String) itemMap.get("foodName");
String classification = (String) itemMap.get("foodClassification");
String describe = (String) itemMap.get("describe");

Food food = new Food();
//food.setId(num);
food.setFoodName(foodName);
food.setFoodClassification(classification);
food.setDescribe(describe);
Intent intent = new Intent();
intent.putExtra("food", food);
intent.setClass(SearchActivity.this, ShowInfoActivity.class); //跳转到显示的页面
SearchActivity.this.startActivity(intent);
}

});*/

//建立新的意图，将food1打包成food用putExtra()传出去，跳转到SearchShowActivity.class中去。

Intent intent = new Intent(); //建立新的意图，
intent.putExtra("food", food1); //将food1打包成food用putExtra()传出去
intent.setClass(SearchActivity.this, SearchShowActivity.class); //跳转到SearchShowActivity.class中去。
SearchActivity.this.startActivity(intent); //开启意图
finish();
}
});

gotoMain();
}

public void gotoMain()
{

Button bOk1=(Button)this.findViewById(R.id.sscp);
bOk1.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {
Intent intent=new Intent(SearchActivity.this,SearchActivity.class); //如果点击的是搜索菜谱，则不变。
startActivity(intent);
finish();
}
});

Button bOk2=(Button)this.findViewById(R.id.ckcp);
bOk2.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {
Log.d("Caipu", "cha kan cai pu");////////////？？？？这句是干嘛的？
Intent intent=new Intent(SearchActivity.this,LookupMenuActivity.class); //如果点击的是查看菜谱，跳到查看菜谱
startActivity(intent);
finish();
}
});

Button bOk3=(Button)this.findViewById(R.id.tjcp);
bOk3.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {
Intent intent=new Intent(SearchActivity.this,AddMenuActivity.class); //创建Intent对象
startActivity(intent);
finish();
}
});

}
}



3.2  SearchShowActivity.java用于显示搜索的结果，点击其中ListView将会跳转到LookUpMenuActivity.java中显示具体信息。
package com.androidhomework.caipu;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class SearchShowActivity extends Activity{

protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.searchshow_activity);

//获得SearchActivity中传过来的数据 intent.putExtra("food", food1); //将food1打包成food用putExtra()传出去
Intent intent = this.getIntent();
DBFood food = (DBFood) intent.getSerializableExtra("food");

ArrayList<HashMap<String,Object>> data = new ArrayList<HashMap<String,Object>>();
HashMap<String,Object> foodh = new HashMap<String,Object>();
foodh.put("num", food.getId());
foodh.put("foodName", food.getFoodName());
foodh.put("foodClassification", food.getFoodClassification());
foodh.put("describe", food.getDescribe());
data.add(foodh);

//一个简单的适配器，！！！！！这里就是将刚刚建的 list_item导进来，表示那个是用在这里的listView2_search中的！！！！。
SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.list_item, new String[]{"foodName","foodClassification"}, new int[]{R.id.name,R.id.classification});
ListView listview = (ListView) findViewById(R.id.listView2_search);
listview.setAdapter(adapter);

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> adapterView, View view,
int position, long id) {
// TODO Auto-generated method stub
HashMap<String,Object> itemMap = (HashMap<String, Object>) adapterView.getItemAtPosition(position);
//int num = (Integer) itemMap.get("id");
String foodName = (String) itemMap.get("foodName");
String classification = (String) itemMap.get("foodClassification");
String describe = (String) itemMap.get("describe");

DBFood food = new DBFood();
//food.setId(num);
food.setFoodName(foodName);
food.setFoodClassification(classification);
food.setDescribe(describe);

Intent intent = new Intent();
intent.putExtra("food", food);
intent.setClass(SearchShowActivity.this, LookupMenuActivity.class); //跳转到显示的页面
SearchShowActivity.this.startActivity(intent);
}

});
}
}


3.3 LookUpMenuActivity.java用来实现显示具体信息
package com.androidhomework.caipu;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class LookupMenuActivity extends Activity{

TextView textViewN;
TextView textViewC;
TextView textViewD;

protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.lookupmenu_activity);
textViewN = (TextView) findViewById(R.id.show_name_t); //xml里定义了show_name_t、show_classification_t、show_describe_t用来显示结果
textViewC = (TextView) findViewById(R.id.show_classification_t);
textViewD = (TextView) findViewById(R.id.show_describe_t);
Intent intent = this.getIntent();
DBFood food = (DBFood) intent.getSerializableExtra("food"); //将SearchShowActivity.java中打包传过来的food接受。

textViewN.setText(food.getFoodName()); //将food传来的名字、类型、描述与显示结果的textview绑定，显示在上面。
textViewC.setText(food.getFoodClassification());
textViewD.setText(food.getDescribe());
}

//下面的代码用来实现删除功能，建立了optionmenu,在手机右上角或者右下角的下拉列表（竖着的三个点）中显示
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
menu.add(0, 1, 1, "删除该菜品"); //表示只有一项，删除该项菜品
//menu.add(0,2,2,"返回");
return super.onCreateOptionsMenu(menu);
}

//对于删除功能的实现
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
DBFoodService foods = new DBFoodService(this);
Intent intent = new Intent();
switch(item.getItemId()){
case 1:
//Toast.makeText(MainActivity.this, "删除菜品", Toast.LENGTH_SHORT).show();
foods.delete(textViewN.getText().toString()); //调用删除将其删除
intent.setClass(LookupMenuActivity.this, MyMenuActivity.class); //删除后跳转到MyMenuActivity.class
LookupMenuActivity.this.startActivity(intent);
finish();
break;
/*case 2:

//Toast.makeText(MainActivity.this, "清空菜谱", Toast.LENGTH_SHORT).show();
intent.setClass(ShowInfoActivity.this, MainActivity.class);
ShowInfoActivity.this.startActivity(intent);
finish();
break; */
}

return super.onOptionsItemSelected(item);
}

}