权限：
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
依赖：
compile 'com.google.code.gson:gson:2.8.2'
MainActivity布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.mrzhao.examdemo.MainActivity">
<Button
android:id="@+id/getData_bt" android:onClick="onClick" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:text="点击获取网络数据" tools:ignore="OnClick" /> <Button android:id="@+id/toSecond_bt" android:onClick="onClick" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp"android:text="跳转到第二个页面" tools:ignore="OnClick" /> </LinearLayout>
MainActivity代码：
public class MainActivity extends AppCompatActivity {
private String path = "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=20&page=1";
private FoodEntity foodEntity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onClick(View view) {
switch (view.getId()) {
case R.id.getData_bt:
new MyTask().execute();
break;
case R.id.toSecond_bt:
if (foodEntity!=null){
Intent intent = new Intent(this,SecondActivity.class);
intent.putExtra("food",foodEntity);
startActivity(intent);
}
break;
}
}
class MyTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... strings) {
return getDataFromNet();
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
//判断不是空就去解析
if (!TextUtils.isEmpty(s)) {
Gson gson = new Gson();
foodEntity= gson.fromJson(s, FoodEntity.class);
}
}
}
/**
* 网络获取数据
*
* @return
*/
private String getDataFromNet() {
InputStream inputStream = null;
ByteArrayOutputStream outputStream = null;
try {
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(30 * 1000);
conn.setReadTimeout(30 * 1000);
conn.connect();
if (conn.getResponseCode() == 200) {
inputStream = conn.getInputStream();
outputStream = new ByteArrayOutputStream();
int len = 0;
byte[] bytes = new byte[1024];
while ((len = inputStream.read(bytes)) != -1) {
outputStream.write(bytes, 0, len);
}
return outputStream.toString();
}
} catch (MalformedURLException e) {
e.printStackTrace(www.fengshen157.com);
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally {
if (inputStream!=null){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (outputStream!=null){
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null; }}
SecondActivity布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://www.fengshen157.com schemas.android.com/apk/res/android"
xmlns:app="http://www.huarenyl.cn schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.mrzhao.examdemo.SecondActivity">
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>
SecondActivity代码：
public class SecondActivity extends AppCompatActivity {
private ListView listView;
private MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
//获取传递过来的解析对象
FoodEntity foodEntity = (FoodEntity) getIntent().getSerializableExtra("food");
final List<FoodEntity.DataBean> data = foodEntity.getData();
//实例化视图
listView = www.006665.cn (ListView) findViewById(R.id.listView);
myAdapter = new MyAdapter(data, this);
listView.setAdapter(myAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(SecondActivity.this, www.huayi157.com/ data.get(position).getTitle(), Toast.LENGTH_SHORT).show();
}
});
}
}
Item条目布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_www.baohuayule.com width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/title_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:textSize="20sp"www.baohuayule.cn />
</LinearLayout>
适配器：
public class MyAdapter extends BaseAdapter {
private List<FoodEntity.DataBean> list;
private Context context;
private LayoutInflater www.thylgw.cn/ inflater;
public MyAdapter(List<FoodEntity.DataBean> list, Context context) {
this.list = list;
this.context = context;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_layout, parent, false);
holder = new ViewHolder();
holder.titleTv = (TextView) convertView.findViewById(R.id.title_tv);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
String title = list.get(position).getTitle();
holder.titleTv.setText(title);
return convertView;
}
static class ViewHolder {
TextView titleTv;
}
}
解析实体类：
public class FoodEntity implements Serializable{
/**
* ret : 1
* data : [{"id":"8289","title":"油焖大虾","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/9/8289.jpg","collect_num":"1659","food_str":"大虾 葱 生姜 植物油 料酒","num":1659},{"id":"2127","title":"四川回锅肉","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2127.jpg","collect_num":"1585","food_str":"猪肉 青蒜 青椒 红椒 姜片","num":1585},{"id":"30630","title":"超简单芒果布丁","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/31/30630.jpg","collect_num":"1529","food_str":"QQ糖 牛奶 芒果","num":1529},{"id":"9073","title":"家常红烧鱼","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9073.jpg","collect_num":"1419","food_str":"鲜鱼 姜 葱 蒜 花椒","num":1419},{"id":"10097","title":"家常煎豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10097.jpg","collect_num":"1406","food_str":"豆腐 新鲜红椒 青椒 葱花 油","num":1406},{"id":"10509","title":"水煮肉片","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10509.jpg","collect_num":"1336","food_str":"瘦猪肉 生菜 豆瓣酱 干辣椒 花椒","num":1336},{"id":"46968","title":"红糖苹果银耳汤","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/47/46968.jpg","collect_num":"1245","food_str":"银耳 苹果 红糖","num":1245},{"id":"10191","title":"麻婆豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10191.jpg","collect_num":"1214","food_str":"豆腐 肉末 生抽 白糖 芝麻油","num":1214},{"id":"2372","title":"皮蛋瘦肉粥","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2372.jpg","collect_num":"1147","food_str":"大米 皮蛋 猪肉 油条 香葱","num":1147},{"id":"2166","title":"蚂蚁上树","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2166.jpg","collect_num":"1140","food_str":"红薯粉 肉 姜 蒜 花椒","num":1140},{"id":"2262","title":"糖醋肉","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2262.jpg","collect_num":"1074","food_str":"猪肉 红椒 黄椒 洋葱 蛋清","num":1074},{"id":"9971","title":"鱼香豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9971.jpg","collect_num":"1004","food_str":"豆腐 木耳 胡萝卜 香葱 番茄酱","num":1004},{"id":"10172","title":"干煸四季豆","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10172.jpg","collect_num":"988","food_str":"四季豆 干辣椒 蒜头 酱油 糖","num":988},{"id":"2685","title":"胡萝卜肉末蒸蛋","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2685.jpg","collect_num":"918","food_str":"胡萝卜 肉 蛋 生抽 盐","num":918},{"id":"9972","title":"虎皮青椒","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9972.jpg","collect_num":"889","food_str":"青辣椒 大蒜 香醋 白糖 生抽","num":889},{"id":"10437","title":"叉烧排骨","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10437.jpg","collect_num":"797","food_str":"排骨 李锦记叉烧酱 植物油 清水 油菜","num":797},{"id":"2892","title":"\u201c五行\u201d彩蔬汤","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2892.jpg","collect_num":"756","food_str":"黑木耳 玉米 牛蒡 胡萝卜 西兰花","num":756},{"id":"33783","title":"美人豆浆","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/34/33783.jpg","collect_num":"753","food_str":"黄豆 红豆 绿豆 黑豆 黑米","num":753},{"id":"2348","title":"麻辣肉丝面","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2348.jpg","collect_num":"753","food_str":"面条 肉丝 淀粉 酱油 辣椒","num":753},{"id":"10044","title":"土豆炖翅根","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10044.jpg","collect_num":"752","food_str":"土豆 翅根 葱 姜 料酒","num":752}]
*/
private int ret;
private List<DataBean> data;
public int getRet() {
return ret;
}
public void setRet(int ret) {
this.ret = ret;
}
public List<DataBean> getData() {
return data;
}
public void setData(List<DataBean> data) {
this.data = data;
}
public static class DataBean implements Serializable{
/**
* id : 8289
* title : 油焖大虾
* pic : http://www.qubaobei.com/ios/cf/uploadfile/132/9/8289.jpg
* collect_num : 1659
* food_str : 大虾 葱 生姜 植物油 料酒
* num : 1659
*/
private String id;
private String title;
private String pic;
private String collect_num;
private String food_str;
private int num;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
public String getCollect_num() {
return collect_num;
}
public void setCollect_num(String collect_num) {
this.collect_num = collect_num;
}
public String getFood_str() {
return food_str;
}
public void setFood_str(String food_str) {
this.food_str = food_str;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}