HttpClient的简单使用

由于这个API已经被关闭  在Studio使用时  需要在Gradle里面找到本工程  添加一行代码，才能使用，如下：

android {
useLibrary 'org.apache.http.legacy'

}

get请求

/**
* 用用HttpClient查询天气信息  聚合数据---->全国天气预报接口
*
*/
public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

//点击事件  获取天气信息
public void httpClientGetRequest(View view){

new Thread(){
@Override
public void run() {
super.run();
getWeather();
}
}.start();

}

//用HttpClient获取天气信息
public void getWeather(){
try {
//实例化对象  相当于打开浏览器
//HttpClient其实是一个接口  DefaultHttpClient是其实现类
HttpClient client = new DefaultHttpClient();

//请求地址 ：可以分为两部分
//1：接口信息
//2：参数信息
HttpGet httpGet = new HttpGet("http://v.juhe.cn/weather/index?format=2&cityname="+ URLEncoder.encode("北京","utf-8")+"&key=01b3d0d1bb6251f441ffe18a07ad655c");

//建立连接
HttpResponse response = client.execute(httpGet);
int code = response.getStatusLine().getStatusCode();

if (code == 200){
InputStream is = response.getEntity().getContent();
String json = StreamTOString.readFromNetWork(is);
Log.e( "-----------", json);
}

} catch (IOException e) {
e.printStackTrace();
}

}

}

post请求

/**
* 用用HttpClient查询菜谱信息  聚合数据---->菜谱大全接口
*
*/

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

public void btnHttpClientPost(View v){
new Thread(){
@Override
public void run() {
super.run();
// httpClientPostReqeust("红烧肉","a7a42220c5c1c5268be7ba25af764f6c");
httpClientPostReqeust("ed1088c0c4ac34c42a270fabf0de9b5a");
}
}.start();

}

/**
*
* httpClietnt API 的pOST方式拉去数据
*
*/
private String httpClientPostReqeust(String key) {

try {
//默认 取消对HttpClient的一个支持
//1.打开浏览器
HttpClient httpClient = new DefaultHttpClient();
//2.填下地址
HttpPost httpPost = new HttpPost("http://v.juhe.cn/WNXG/city");
//httpPost.addHeader("token","123544");

//设置请求参数
List<BasicNameValuePair> paramters = new ArrayList<>();
//只是添加一个了参数
//paramters.add(new BasicNameValuePair("menu", menu));
paramters.add(new BasicNameValuePair("key", key));
httpPost.setEntity(new UrlEncodedFormEntity(paramters));

//key=43434&name=zhangsan

//3.回车
HttpResponse httpResponse = httpClient.execute(httpPost);

//等待服务器响应
//200  成功  404 资源没找到  500 服务内部错误
int code = httpResponse.getStatusLine().getStatusCode();
if (code == HttpStatus.SC_OK) {
//获取服务的响应内容
InputStream is = httpResponse.getEntity().getContent();
String json = StreamTools.readFromNetWork(is);
System.out.println("http post 请求结果 : " + json);
return json;
}

} catch (Exception e) {
e.printStackTrace();
}

return null;
}

}