找呀志_通过开源框架引AsyncHttpClient上传文件

一个、步骤：

1.加入权限（接入网络和可写）

2.获取上传文件的路径和推断是空的

3.如果为空。创建一个异步请求对象

4.创建上传文件路径

5.跑post请求（指定url路径。封装上传參数。新建AsyncHttpResponseHandler方法）

二、查看參考文档

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhemhpMjEyOQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">

三、实例项目解析

执行效果例如以下：

在本地目录中查看是否获取到图片，例如以下图显示

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhemhpMjEyOQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">

重点代码：均有具体解析。请认真查看凝视

1、在AndroidManifest.xml中加入权限

<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button

	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();

			//推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";

				//封装文件上传的參数

				RequestParams params = new RequestParams();

				//依据路径创建文件

				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----------");

				}

				//运行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

源代码：http://download.csdn.net/detail/zhaoyazhi2129/7400811

转发请标明原文地址http://blog.csdn.net/zhaoyazhi2129/article/details/27048149