安卓 http 編程 筆記

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模板檔案

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/container"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent"><TextView     android:id="@+id/tv_user"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="使用者名稱"    /><EditText     android:id="@+id/et_user"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:hint="請填寫使用者名稱"    /><TextView     android:id="@+id/tv_pass"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="密碼"    /><EditText     android:id="@+id/et_pass"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:hint="請填寫密碼"    /><Button     android:id="@+id/button"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="get登入"    android:onClick="getLogin"    /><Button     android:id="@+id/button2"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="post登入"    android:onClick="postLogin"    /><Button     android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="httpClientGet登入"    android:onClick="clientGetLogin"    /><Button     android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="httpClientPost登入"    android:onClick="clientPostLogin"    /></LinearLayout>

MainActivity

package com.http.action;import com.login.service.LoginService;import android.app.Activity;import android.app.ActionBar;import android.app.Fragment;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import android.os.Build;public class MainActivity extends Activity {protected static final int LOGIN_SUCCESS = 1;protected static final int LOGIN_ERROR = 2;private EditText et_user;private EditText et_pass;private Handler handler = new Handler() {public void handleMessage(android.os.Message message){switch (message.what) {case LOGIN_SUCCESS:Toast.makeText(MainActivity.this, (String) message.obj, Toast.LENGTH_SHORT).show();break;case LOGIN_ERROR:Toast.makeText(MainActivity.this, "登入失敗", Toast.LENGTH_SHORT).show();break;}}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);et_user = (EditText) findViewById(R.id.et_user);et_pass = (EditText) findViewById(R.id.et_pass);}/** * 登入 * @param view */public void getLogin(View view){final String user = et_user.getText().toString().trim();final String pass = et_pass.getText().toString().trim();new Thread(){public void run(){String res = LoginService.byGetLogin(user, pass);if (res != null) {Message msg = new Message();msg.what = LOGIN_SUCCESS;msg.obj = res;handler.sendMessage(msg);} else {Message msg = new Message();msg.what = LOGIN_ERROR;handler.sendMessage(msg);}}}.start();}/** * post 方式提交 * @param view */public void postLogin(View view){final String user = et_user.getText().toString().trim();final String pass = et_pass.getText().toString().trim();new Thread(){public void run(){String text = LoginService.byPostLogin(user, pass);if (text != null) {Message msg = new Message();msg.what = LOGIN_SUCCESS;msg.obj = text;handler.sendMessage(msg);} else {Message msg = new Message();msg.what = LOGIN_ERROR;handler.sendMessage(msg);}}}.start();}/** * client get login * @param view */public void clientGetLogin(View view){final String user = et_user.getText().toString().trim();final String pass = et_pass.getText().toString().trim();new Thread(){public void run(){String res = LoginService.httpClientGetLogin(user, pass);if (res != null) {Message msg = new Message();msg.what = LOGIN_SUCCESS;msg.obj = res;handler.sendMessage(msg);} else {Message msg = new Message();msg.what = LOGIN_ERROR;handler.sendMessage(msg);}}}.start();}/** * client post login * @param view */public void clientPostLogin(View view){final String user = et_user.getText().toString().trim();final String pass = et_pass.getText().toString().trim();new Thread(){public void run(){String res = LoginService.httpClientPostLogin(user, pass);if (res != null) {Message msg = new Message();msg.what = LOGIN_SUCCESS;msg.obj = res;handler.sendMessage(msg);} else {Message msg = new Message();msg.what = LOGIN_ERROR;handler.sendMessage(msg);}}}.start();}}

LoginService

package com.login.service;import java.io.InputStream;import java.io.OutputStream;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpConnection;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import com.stream.utils.Stream;public class LoginService {/** * 通過get方式提交 * @param user * @param pass * @return */static public String byGetLogin(String user, String pass){String path = "http://192.168.0.105/index.php?user="+user+"&pass="+pass;try {URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setReadTimeout(5000);conn.setRequestMethod("GET");int code = conn.getResponseCode();System.out.println(code);if (code == 200) {InputStream is = conn.getInputStream();String text = Stream.isToString(is);return text;} else {return null;}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();return null;}}/** * 通過post方式提交 * @param user * @param pass * @return */static public String byPostLogin(String user, String pass){String path = "http://192.168.0.105/index.php";try {URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");String data = "user="+user+"&pass="+pass;conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");conn.setRequestProperty("Content-Length", data.length()+"");conn.setDoOutput(true);OutputStream os = conn.getOutputStream();os.write(data.getBytes());int code = conn.getResponseCode();if (code == 200) {InputStream is = conn.getInputStream();return Stream.isToString(is); } else {return null;}} catch (Exception e) {e.printStackTrace();return null;}}/** * 採用httpclient get 提交 * @param user * @param pass * @return */static public String httpClientGetLogin(String user, String pass){String path = "http://192.168.0.105/index.php?user="+user+"&pass="+pass;try {HttpClient client = new DefaultHttpClient();HttpGet get = new HttpGet(path);HttpResponse response = client.execute(get);int code = response.getStatusLine().getStatusCode();if (code == 200) {InputStream is = response.getEntity().getContent();String text = Stream.isToString(is);return text;}return null;} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();return null;}}/** * httpClient post 方式提交 * @param user * @param pass * @return */static public String httpClientPostLogin(String user, String pass){String path = "http://192.168.0.105/index.php";HttpClient client = new DefaultHttpClient();HttpPost post = new HttpPost(path);List<NameValuePair> parameters = new ArrayList<NameValuePair>();parameters.add(new BasicNameValuePair("user", user));parameters.add(new BasicNameValuePair("pass", pass));try {post.setEntity(new UrlEncodedFormEntity(parameters, "UTF-8"));HttpResponse response = client.execute(post);int code = response.getStatusLine().getStatusCode();if (code == 200) {InputStream is = response.getEntity().getContent();String text = Stream.isToString(is);return text;}return null;} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();return null;}}}

stream 把 輸入資料流轉換成字串

package com.stream.utils;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;public class Stream {/** * 把一個輸入資料流變成字串 * @param is * @return * @throws IOException */static public String isToString(InputStream is) throws IOException{ByteArrayOutputStream baos = new ByteArrayOutputStream();int len = 0;byte[] buffer = new byte[1024];while ((len = is.read(buffer)) != -1) {baos.write(buffer);}byte[] result = baos.toByteArray();is.close();baos.close();return new String(result);}}

切記資訊清單檔許可權

<uses-permission android:name="android.permission.INTERNET"/>

安卓 http 編程 筆記