Android——使用网络技术之解析XML

安装apache

在其目录中添加.xml文件进行解析

注意安卓访问本机需要的ip是10.0.2.2

package com.wangkangli.okhttplearn;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;

import java.io.StringReader;

import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    TextView responseText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button sendRequest = findViewById(R.id.send_request);
        responseText= findViewById(R.id.response_text);
        sendRequest.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if (v.getId()==R.id.send_request){
            sendRequestWithOkHttp();
        }
    }
    private void sendRequestWithOkHttp(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                   OkHttpClient client = new OkHttpClient();
                   Request request = new Request.Builder()
                           .url("http://10.0.2.2/get_data.xml")
                           .build();
                   Response response = client.newCall(request).execute();
                   String responseData = response.body().string();
                   parseXMLWithPull(responseData);
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }).start();
    }
    private void parseXMLWithPull(String xmlData){
        try{
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            XmlPullParser xmlPullParser = factory.newPullParser();
            xmlPullParser.setInput(new StringReader(xmlData));
            int eventType = xmlPullParser.getEventType();
            String id ="";
            String name = "";
            String version = ";";
            while(eventType!=XmlPullParser.END_DOCUMENT){
                String nodeName = xmlPullParser.getName();
                switch (eventType){
                    case XmlPullParser.START_TAG:{
                        if ("id".equals(nodeName)){
                            id = xmlPullParser.nextText();
                        }else if ("name".equals(nodeName)){
                            name = xmlPullParser.nextText();
                        }else if ("version".equals(nodeName)){
                            version = xmlPullParser.nextText();
                        }
                        break;
                    }
                    case  XmlPullParser.END_TAG:{
                        if ("app".equals(nodeName)){
                            Log.d("MainActivity","id is"+ id);
                            Log.d("MainActivity","name is"+ name);
                            Log.d("MainActivity","version is"+ version);

                        }
                        break;
                    }
                    default:
                        break;
                }
                eventType = xmlPullParser.next();

            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    private void showResponse(final String response){
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                responseText.setText(response);
            }
        });
    }
}