android实用代码（转）

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");
        }
         
         
    }
}