android实用代码 （转）

android实用代码

今天晚上写了测试类，虽然说达不到什么效果。但是能给大家一些实用的代码。

让我看看代码的：

package com.smart.net.utils;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Map;


public class NetTool {
	
	/**
	 * byte[] data=param.getBytes(); 以后要注意，发送数据接收数据，都要用字节数组去接收它
	 * 
	 * 
	 * Content-Type 指action entype="multipart/x-"
	 * */
	public static InputStream sendPostRequest(String uriPath,
			Map<String, String> params, String encoding) throws Exception {
		// String param="id=67&name"+URLEncoder.encode("老梁","UTF-8");//要发送的数据
		StringBuilder sb = new StringBuilder();
		// 进行封装
		for (Map.Entry<String, String> entry : params.entrySet()) {
			sb.append(entry.getKey()).append("=")
					.append(URLEncoder.encode(entry.getValue(), encoding));
			sb.append('&');

		}

		sb.deleteCharAt(sb.length() - 1);

		byte[] data = sb.toString().getBytes();
		URL url = new URL(uriPath);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setConnectTimeout(6 * 1000);
		conn.setDoOutput(true);// 发送POST至服务器
		conn.setUseCaches(false);
		conn.setRequestMethod("POST");
		conn.setRequestProperty("Connection", "Keep-Alive");
		conn.setRequestProperty("Charset", "UTF-8");
		conn.setRequestProperty("Content-Length", String.valueOf(data.length));
		conn.setRequestProperty("Content-Type",
				"application/x-www-form-urlencoded");
		DataOutputStream dataOutStream = new DataOutputStream(
				conn.getOutputStream());// 得到输出流
		dataOutStream.write(data);
		dataOutStream.flush();
		dataOutStream.close();

		System.out.println(conn.getResponseCode());

		if (conn.getResponseCode() == 200) {
			return conn.getInputStream();
		}
		return null;
	}
	
	
	/**
	 * 
	 * 
	 * */
	
	public static String getTextContent(InputStream inStream,String encoding) throws Exception {
			byte[] data=readStream(inStream);
			return new String(data,encoding);
	
	}
	/**
	 * 获取URL路径指定的内容
	 * 
	 * 
	 * 获得指定内容
	 * */
	
	public static String getTextContent2(String path,String encoding) throws Exception {
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(6 * 1000);
		// 别超过10秒。
		System.out.println(conn.getResponseCode());
		if(conn.getResponseCode()==200){
			InputStream inputStream=conn.getInputStream();
			byte[] data=readStream(inputStream);
			return new String(data,encoding);
		}
		return null;
	}
	/**
	 * 直接可以得到文本与流的数据
	 * */
	public static InputStream getContent(String uriPath) throws Exception {
		URL url = new URL(uriPath);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(6 * 1000);
		// 别超过10秒。
		System.out.println(conn.getResponseCode());
		if(conn.getResponseCode()==200){
			return conn.getInputStream();
		}
		return null;
	}
	
//	/**
//	 * 直接可以得到文本与流的数据
//	 * */
	public static InputStream getContentImputStream(String path,String encoding) throws Exception {
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(6 * 1000);
		// 别超过10秒。
		System.out.println(conn.getResponseCode());
		if(conn.getResponseCode()==200){
			return conn.getInputStream();
		}
		return null;
	}
/**
 * 获取指定路径，的数据。
 * 
 * **/
	public static byte[] getImage(String urlpath) throws Exception {
		URL url = new URL(urlpath);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(6 * 1000);
		// 别超过10秒。
		if(conn.getResponseCode()==200){
			InputStream inputStream=conn.getInputStream();
			return readStream(inputStream);
		}
		return null;
	}
	
	/**
	 * 读取数据 
	 * 输入流
	 * 
	 * */
	public static byte[] readStream(InputStream inStream) throws Exception {
		ByteArrayOutputStream outstream=new ByteArrayOutputStream();
		byte[] buffer=new byte[1024];
		int len=-1;
		while((len=inStream.read(buffer)) !=-1){
			outstream.write(buffer, 0, len);
		}
		outstream.close();
		inStream.close();
		
	return outstream.toByteArray();
}
	

	
	
}
package com.smart.activity;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

import android.test.AndroidTestCase;
import android.util.Log;

import com.smart.net.utils.FormFile;
import com.smart.net.utils.HttpRequester;
import com.smart.net.utils.NetTool;

/**
 * 如何使用大数据发送
 * */
public class PostParamTest extends AndroidTestCase {
	
	
	/***
	 * 本代码报错，原因为数据类型不对，18 向Internet上传文件-1.avi  38：38分
	 * 
	 * 
	 * */
	private final String TAG = "PostParamTest";
/***
 * 上专文件，
 * 要有四部份数据
 * 名称
 * 内容类型
 * 表单字段名称
 * 类型
 * 发送文件及文本请求参数
 * 
 * 面试上专100M
 * 文件读成数组，然后写上传上去
 *上传到网络流里面去， 
 * */
	
	//发送文件及文本请求参数
	public void testSendPostFileparams() throws Exception{
		Map<String,String> params=new HashMap<String,String>();
		params.put("method", "save");
		params.put("id", "988");
		params.put("name", "老梁");
		FileInputStream inStream=new FileInputStream(new File("/sdcard/smart.xml"));
//		byte[] data=NetTool.readStream(inStream);
//		inStream.close();
		FormFile file=new FormFile("smart.xml",inStream,"file","test/xml");
		
		//这行代码出现报错
//		HttpRequester.post("www.baidu.com",params,file);
		
		
//		HttpRequester.post("", params, null);
	}

	/**
	 * 利用
	 * （资源包）httpcomponents-asyncclient-4.0根据包下面的内容显示，
	 * pairms.add(new BasicNameValuePair("id", "988"));//服务器端
		pairms.add(new BasicNameValuePair("name", "老梁"));
		pairms.add(new BasicNameValuePair("method", "save"));
	 * 两种做方法
	 * */
	
	//通过HhttpClien发送Post请求
	public void testSendPostParamFromHttpClient() throws Exception {
		HttpPost httpPost = new HttpPost("");//请求参数，指服务器地址。
		List<NameValuePair> pairms = new ArrayList<NameValuePair>();//参娄
		pairms.add(new BasicNameValuePair("id", "988"));//服务器端
		pairms.add(new BasicNameValuePair("name", "老梁"));
		pairms.add(new BasicNameValuePair("method", "save"));
		//代表数据部分
		httpPost.setEntity(new UrlEncodedFormEntity(pairms, HTTP.UTF_8));
		DefaultHttpClient httpclient = new DefaultHttpClient();
		HttpResponse response = httpclient.execute(httpPost);
		response.getEntity().getContent();
		// Log.i(TAG, result);
	}

	// 读取服务器信息
//自定义发送Post请求
	public void testSendPostParam() throws Exception {
		// 这里放的服务器地址，我们可以把JAVA写的项目眼布起来，一样都可以使用。

		String path = "http:www.baidu.com";
		Map<String, String> params = new HashMap<String, String>();
		params.put("methos", "save");
		params.put("id", "29832");
		params.put("name", "老梁");
		String result = NetTool.getTextContent(NetTool.sendPostRequest(path,params,"UTF-8"), "UTF-8");
		Log.i(TAG, result);
	}
}
package com.smart.activity;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;

import android.os.Environment;
import android.test.AndroidTestCase;
import android.util.Log;

import com.smart.domain.Resource;
import com.smart.net.utils.NetTool;
import com.smart.net.utils.SAXResourceService;

public class GetXMLTest extends AndroidTestCase {
	private static final String TAG = "GetXMLTest";

	public void testGetXML() throws Exception {
		// 如果参数是中文，必须进行Url编码
		String path = "http://211.143.108.6/wap/ResCatService?act=pic&s=h";
//		String xml = NetTool.getTextContent(NetTool.getContent(path), "UTF-8");
		String xml = NetTool.getTextContent2(path, "UTF-8");
		FileOutputStream outStream=new FileOutputStream(new File(Environment.getExternalStorageDirectory(),"test.xml"));
		OutputStreamWriter writer=new OutputStreamWriter(outStream,"UTF-8");
		writer.write(xml);
		writer.flush();//一定写进这个方法，要不然，写到内容里面就会没有写入文本
		outStream.close();
//		Log.i(TAG, xml);

		
	}
	
	//这种性能会差一点
	public void testGetXMLAndParser() throws Exception {
		// 如果参数是中文，必须进行URI编码
		String path = "http://211.143.108.6/wap/ResCatService?act=pic&s=h";
		String xml = NetTool.getTextContent(NetTool.getContent(path), "UTF-8");
		InputStream inStream=new ByteArrayInputStream(xml.getBytes());
		Resource resource=SAXResourceService.readXml(inStream);
		Log.i(TAG, resource.toString());//打印出来XML文件的资源
		
	}
	/**
	 * 
	 * 
	 * */
//	public void testGetXMLAndParset() throws Exception{
//		String path="";
//		String xml=Net
//	}
	
	//这种调用方法效果相对来讲会好一点
	public void testGetXMLAndParser2() throws Exception {
		// 如果参数是中文，必须进行URI编码
		String path = "http://211.143.108.6/wap/ResCatService?act=pic&s=h";
		InputStream inStream = NetTool.getContent(path);//
//		InputStream inStream=new ByteArrayInputStream(xml.getBytes());
		if(inStream!=null){
			Resource resource=SAXResourceService.readXml(inStream);
			Log.i(TAG, resource.toString());//打印出来XML文件的资源
		}else{
			Log.i(TAG, "----------->ERROR");
		}
		
		
	}
}

标签: android实用代码