赵雅智_引用开源框架通过AsyncHttpClient进行文件上传

一、步骤:

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)

 

二、查看参考文档

 赵雅智_引用开源框架通过AsyncHttpClient进行文件上传_第1张图片

三、实例项目解析

运行效果如下:

 赵雅智_引用开源框架通过AsyncHttpClient进行文件上传_第2张图片     


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_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:ems="10" 
        android:text="/storage/sdcard0/1.jpg">
        
        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/btn_upload"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        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();
						}
					}

					@Override
					public void onFailure(int statusCode, Header[] headers,
							byte[] responseBody, Throwable error) {
						error.printStackTrace();
					}
				});

			}
			break;

		default:
			break;
		}

	}

}


 

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

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