Android利用Get、Post 擷取網路資料

Android利用Get、Post 擷取網路資料

首先是Get：

布局很簡單，就一個按鈕，主要看一下MainActivity吧：

package com.francis.httpget;import android.app.Activity;import android.os.AsyncTask;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;public class MyActivity extends Activity {    BufferedReader bufferedReader;    InputStreamReader inputStreamReader;    InputStream inputStream;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_my);        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                new AsyncTask() {                    @Override                    protected Void doInBackground(String... params) {                        try {                            URL url = new URL(params[0]);                            URLConnection connection = url.openConnection();                            inputStream = connection.getInputStream();                            inputStreamReader = new InputStreamReader(inputStream,"UTF-8");                            bufferedReader = new BufferedReader(inputStreamReader);                            String line;                            while (true) {                                if ((line = bufferedReader.readLine()) != null) {                                    System.out.println(line);                                }                            }                        } catch (Exception e) {                            e.printStackTrace();                        } finally {                            try {                                bufferedReader.close();                                inputStreamReader.close();                                inputStream.close();                            } catch (IOException e) {                                e.printStackTrace();                            }                        }                        return null;                    }                }.execute("http://fanyi.youdao.com/openapi.do?keyfrom=HttpGetFrancis&key=893755706&type=data&doctype=xml&version=1.1&q=這裡是有道翻譯API");            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.my, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

url為有道翻譯提供的API,非常方便。控制台輸出

接著是Post：

很簡單，這裡只給出提交post請求的Button的點擊事件：

和Get相比有2點需要注意：

1.url與參數是分開的；<喎?http://www.bkjia.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+Mi5jb25uZWN0aW9uLnNldERvSW5wdXQodHJ1ZSk7PGJyPgogICBjb25uZWN0aW9uLnNldERvT3V0cHV0KHRydWUpOzxicj4KICAgY29ubmVjdGlvbi5zZXRSZXF1ZXN0TWV0aG9kKA=="POST");

// Post        findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                new AsyncTask() {                    @Override                    protected Void doInBackground(String... params) {                        try {                            URL url = new URL(params[0]);                            HttpURLConnection connection = (HttpURLConnection)url.openConnection();                            connection.setDoInput(true);                            connection.setDoOutput(true);                            connection.setRequestMethod("POST");                            outputStream = connection.getOutputStream();                            outputStreamWriter = new OutputStreamWriter(outputStream,"UTF-8");                            bufferedWriter = new BufferedWriter(outputStreamWriter);                            bufferedWriter.write("keyfrom=HttpGetFrancis&key=893755706&type=data&doctype=xml&version=1.1&q=這裡是有道翻譯API");                            bufferedWriter.flush();                            inputStream = connection.getInputStream();                            inputStreamReader = new InputStreamReader(inputStream,"UTF-8");                            bufferedReader = new BufferedReader(inputStreamReader);                            String line;                            while (true) {                                if ((line = bufferedReader.readLine()) != null) {                                    System.out.println(line);                                }                            }                        } catch (Exception e) {                            e.printStackTrace();                        } finally {                            try {                                bufferedReader.close();                                inputStreamReader.close();                                inputStream.close();                            } catch (IOException e) {                                e.printStackTrace();                            }                        }                        return null;                    }                }.execute("http://fanyi.youdao.com/openapi.do");            }        });