HttpClient get方式

最新推荐文章于 2024-11-20 11:26:17 发布

原创最新推荐文章于 2024-11-20 11:26:17 发布 · 173 阅读

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本文介绍了一个简单的Android应用如何通过Apache HttpClient发起网络请求并解析返回的JSON数据。该应用使用了Handler机制更新UI线程，展示请求到的数据。

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package zhanghaijiao.bawei.com.day02_demo3;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

private String myurl="http://api.tianapi.com/social/?key=48a7d7193e11bd2dd4a683b6e2f90a4f&num=10";
private TextView textView;

private Handler myHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);

textView.setText(msg.obj.toString());

}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = findViewById(R.id.tv);

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

}

private void requestNetData() {
//需要先添加类库 useLibrary 'org.apache.http.legacy'
//1.创建一个HttpClient对象
HttpClient httpClient=new DefaultHttpClient();
//2.创建HttpGet对象
HttpGet hg=new HttpGet(myurl);
//3.执行
try {
HttpResponse response = httpClient.execute(hg);

//4.判断结果码
int statusCode = response.getStatusLine().getStatusCode();
if(statusCode==200){
//5.获取数据
HttpEntity result = response.getEntity();

String s = EntityUtils.toString(result);

Log.d("zzz","请求下来的json串是："+s);

Message message=Message.obtain();
message.obj=s;
myHandler.sendMessage(message);

}

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

}
}