安卓实训第五天---实现文件上传到SD卡

来源：互联网发布：编程判断质数编辑：程序博客网时间：2024/05/17 01:24

首先讲了如何将文件上传到SD卡中：

package com.example.lesson05_02;import java.io.File;import java.io.FileNotFoundException;import org.apache.http.Header;import android.app.Activity;import android.os.Bundle;import android.text.TextUtils;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;import com.loopj.android.http.RequestParams;public class MainActivity extends Activity implements OnClickListener{ private EditText et_file; private Button btn_upload; private EditText et_username; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  btn_upload = (Button) findViewById(R.id.btn_upload);    et_file = (EditText) findViewById(R.id.et_file);  et_username = (EditText) findViewById(R.id.edit_username);  btn_upload.setOnClickListener(this);  } @Override public void onClick(View v) {  int id =v.getId();  switch (id) {  case R.id.btn_upload:   String path =et_file.getText().toString();   if(TextUtils.isEmpty(path.trim())){    Toast.makeText(this, "上传的文件不能为空", Toast.LENGTH_LONG).show();   }else{    //异步客户端对象    AsyncHttpClient client = new AsyncHttpClient();    String url="http://172.16.237.144:8080/Login/UploadServlet";    //封装文件上传的参数    RequestParams params = new RequestParams();    //根据路径创建文件    File file = new File(path);    try {     //放入文件     params.put("profile_picture", file);     //1、修改这个名称，看能否上传成功     //2、添加上传者的姓名    } catch (FileNotFoundException e) {     System.out.println("文件不存在");     e.printStackTrace();    }    client.post(url, params,new AsyncHttpResponseHandler(){     @Override     public void onFailure(int statusCode, Header[] headers, byte[] responseBody,       Throwable error) {      error.printStackTrace();     }     @Override     public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {      Toast.makeText(MainActivity.this, "文件上传成功！", 1).show();     }          });   }      break;  default:   break;  }   }}

然后分别使用AsynvHttpClient 还有smart-image-view来完成图片查看器：

//不适用SMART IMAGE之前：

/* public void sendGetImg(View v){  int id= v.getId();  switch (id) {  case R.id.btn_img:      String url = et_url.getText().toString();   //发送网络请求   AsyncHttpClient client = new AsyncHttpClient();      client.get(url,new AsyncHttpResponseHandler(){    @Override    public void onFailure(int statusCode, Header[] headers, byte[] responseBody,      Throwable errors) {      errors.printStackTrace();    }    @Override    public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {     if(statusCode==200){      //创建字节工厂对象N      BitmapFactory bitmapFactory = new BitmapFactory();      @SuppressWarnings("static-access")      Bitmap bitmap = bitmapFactory.decodeByteArray(responseBody, 0, responseBody.length);      iv_img.setImageBitmap(bitmap);     }    }       });   break;  default:   break;  } } */ //使用smart image包之后 public void sendGetImg(View v){  int id= v.getId();  switch (id) {  case R.id.btn_img:   String url = et_url.getText().toString();   iv_img.setImageUrl(url, R.drawable.ic_launcher,R.drawable.ic_launcher);   break;  default:   break;  } }

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