去去去
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package com.example.administrator.a01_zhoukao;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ListView;
import com.google.gson.Gson;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.AllowAllHostnameVerifier;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private ListView listView;
private List<DataDataBean.NewslistBean> list = new ArrayList<>();
private MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list_view);
}
public void httpClient(View view){
list.clear();
setAdapter();
MyTask myTask = new MyTask();
myTask.execute("httpClient");
}
public void httpConnection(View view){
list.clear();
setAdapter();
MyTask myTask = new MyTask();
myTask.execute("httpConnection");
}
class MyTask extends AsyncTask<String,Void,String>{
@Override
protected String doInBackground(String... strings) {
if ("httpClient".equals(strings[0])){
try {
//...........加一行代码...证书不匹配的主机名 的问题...org.apache.http有自己的一套SSL东西,修改org.apache.http的主机名验证解决问题
SSLSocketFactory.getSocketFactory().setHostnameVerifier(new AllowAllHostnameVerifier());
//1.创建一个httpClient客户端对象...HttpClient是一个接口..DefaultHttpClient实现类
HttpClient client = new DefaultHttpClient();
//路径不再需要转为url,直接使用字符串即可
String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
//2.创建一个httpGet请求对象
HttpGet httpGet = new HttpGet(path);
//3.使用客户端对象执行一个get请求...返回值是一个响应的对象
HttpResponse response = client.execute(httpGet);
//4.获取响应码....先拿到响应状态行,,,在拿到响应的状态码
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200){
//5.以流的形式获取服务器写回的内容...先拿到响应的实体内容对象,,,再拿响应的实体内容
InputStream inputStream = response.getEntity().getContent();
String json = streamToString(inputStream,"utf-8");
return json;
}
} catch (IOException e) {
e.printStackTrace();
}
}else if ("httpConnection".equals(strings[0])){
String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
try {
URL url = new URL(path);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
//设置
connection.setRequestMethod("GET");
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);
//获取
int responseCode = connection.getResponseCode();
if (responseCode == 200){
//返回的字节流
InputStream inputStream = connection.getInputStream();
//把字节流转成字符串
String json = streamToString(inputStream,"utf-8");
return json;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(String s) {
Gson gson = new Gson();
DataDataBean dataDataBean = gson.fromJson(s, DataDataBean.class);
if (dataDataBean != null){
list.addAll(dataDataBean.getNewslist());
setAdapter();
}
}
}
private void setAdapter(){
if (myAdapter == null){
myAdapter = new MyAdapter(MainActivity.this, list);
listView.setAdapter(myAdapter);
}else {
myAdapter.notifyDataSetChanged();
}
}
private String streamToString(InputStream inputStream,String charset) {
//转成字符流
try {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream,charset);
//转成缓冲流
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
//读取
String s = null;
StringBuilder builder = new StringBuilder();
while ((s = bufferedReader.readLine()) != null){
builder.append(s);
}
bufferedReader.close();
return builder.toString();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ListView;
import com.google.gson.Gson;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.AllowAllHostnameVerifier;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private ListView listView;
private List<DataDataBean.NewslistBean> list = new ArrayList<>();
private MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list_view);
}
public void httpClient(View view){
list.clear();
setAdapter();
MyTask myTask = new MyTask();
myTask.execute("httpClient");
}
public void httpConnection(View view){
list.clear();
setAdapter();
MyTask myTask = new MyTask();
myTask.execute("httpConnection");
}
class MyTask extends AsyncTask<String,Void,String>{
@Override
protected String doInBackground(String... strings) {
if ("httpClient".equals(strings[0])){
try {
//...........加一行代码...证书不匹配的主机名 的问题...org.apache.http有自己的一套SSL东西,修改org.apache.http的主机名验证解决问题
SSLSocketFactory.getSocketFactory().setHostnameVerifier(new AllowAllHostnameVerifier());
//1.创建一个httpClient客户端对象...HttpClient是一个接口..DefaultHttpClient实现类
HttpClient client = new DefaultHttpClient();
//路径不再需要转为url,直接使用字符串即可
String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
//2.创建一个httpGet请求对象
HttpGet httpGet = new HttpGet(path);
//3.使用客户端对象执行一个get请求...返回值是一个响应的对象
HttpResponse response = client.execute(httpGet);
//4.获取响应码....先拿到响应状态行,,,在拿到响应的状态码
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200){
//5.以流的形式获取服务器写回的内容...先拿到响应的实体内容对象,,,再拿响应的实体内容
InputStream inputStream = response.getEntity().getContent();
String json = streamToString(inputStream,"utf-8");
return json;
}
} catch (IOException e) {
e.printStackTrace();
}
}else if ("httpConnection".equals(strings[0])){
String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
try {
URL url = new URL(path);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
//设置
connection.setRequestMethod("GET");
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);
//获取
int responseCode = connection.getResponseCode();
if (responseCode == 200){
//返回的字节流
InputStream inputStream = connection.getInputStream();
//把字节流转成字符串
String json = streamToString(inputStream,"utf-8");
return json;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(String s) {
Gson gson = new Gson();
DataDataBean dataDataBean = gson.fromJson(s, DataDataBean.class);
if (dataDataBean != null){
list.addAll(dataDataBean.getNewslist());
setAdapter();
}
}
}
private void setAdapter(){
if (myAdapter == null){
myAdapter = new MyAdapter(MainActivity.this, list);
listView.setAdapter(myAdapter);
}else {
myAdapter.notifyDataSetChanged();
}
}
private String streamToString(InputStream inputStream,String charset) {
//转成字符流
try {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream,charset);
//转成缓冲流
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
//读取
String s = null;
StringBuilder builder = new StringBuilder();
while ((s = bufferedReader.readLine()) != null){
builder.append(s);
}
bufferedReader.close();
return builder.toString();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
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