1.添加权限（访问网络权限和读写权限）
2.获取上传文件路径并判断是否为空
3.若不为空，创建异步请求对象
4.创建上传文件路径
5.执行post请求（指定url路径，封装上传参数，新建asynchttpresponsehandler方法）
运行效果如下：
在本地文件夹中查看是否获取到图片，如下图显示
重点代码：均有详细解析，请认真查看注释
1、在androidmanifest.xml中添加权限
<uses-permission android:name="android.permission.internet"/>
<uses-permission android:name="android.permission.write_external_storage"/>
<uses-permission android:name="android.permission.mount_unmount_filesystems"/>
2、布局文件activity_main.xml
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingbottom="@dimen/activity_vertical_margin"
android:paddingleft="@dimen/activity_horizontal_margin"
android:paddingright="@dimen/activity_horizontal_margin"
android:paddingtop="@dimen/activity_vertical_margin"
tools:context=".mainactivity" >
<textview
android:id="@+id/textview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="文件上传" />
<edittext
android:id="@+id/et_upload"
android:layout_width="match_parent"
android:layout_below="@+id/textview1"
android:ems="10"
android:text="/storage/sdcard0/1.jpg">
<requestfocus />
</edittext>
<button
android:id="@+id/btn_upload"
android:layout_below="@+id/et_upload"
android:onclick="upload"
android:text="上传文件" />
</relativelayout>
3、mainactivity.java
package com.example.android_upload;
import java.io.file;
import org.apache.http.header;
import android.app.activity;
import android.os.bundle;
import android.text.textutils;
import android.view.view;
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 {
private edittext et_file;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
//获取控件
et_file = (edittext) findviewbyid(r.id.et_upload);
}
//点击上传按钮
public void upload(view v) {
int id = v.getid();
switch (id) {
case r.id.btn_upload:
//获取上传文件的路径
string path = et_file.gettext().tostring();
//判断上次路径是否为空
if (textutils.isempty(path.trim())) {
toast.maketext(this, "上次文件路径不能为空", 1).show();
} else {
//异步的客户端对象
asynchttpclient client = new asynchttpclient();
//指定url路径
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);
} catch (exception e) {
// todo: handle exception
system.out.println("文件不存在----------");
}
//执行post请求
client.post(url,params, new asynchttpresponsehandler() {
@override
public void onsuccess(int statuscode, header[] headers,
byte[] responsebody) {
if (statuscode == 200) {
toast.maketext(getapplicationcontext(), "上次成功", 1)
.show();
}
}
public void onfailure(int statuscode, header[] headers,
byte[] responsebody, throwable error) {
error.printstacktrace();
});
}
break;
default:
}
}
重点代码就是这些，自己动手查看一下效果吧！~
开源框架资源：http://download.csdn.net/detail/zhaoyazhi2129/7400787
源码：http://download.csdn.net/detail/zhaoyazhi2129/7400811
转发请标明原文地址http://blog.csdn.net/zhaoyazhi2129/article/details/27048149