Android 网络提交数据（使用Asynchronous Http Client）

项目主页及简单使用方法http://loopj.com/android-async-http/

<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#88ff98ff"
        android:gravity="center"
        android:text="使用Async框架"
        android:textSize="20sp" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="get_click"
        android:text="GET发送HTTP请求" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="post_click"
        android:text="POST发送HTTP请求" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="upload_click"
        android:text="上传文件" />

</LinearLayout>

activity：

package com.example.asynchttp;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URLEncoder;

import org.apache.http.Header;
import org.apache.http.HttpResponse;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.ResponseHandlerInterface;
import com.loopj.android.http.TextHttpResponseHandler;

import android.os.Bundle;
import android.provider.MediaStore.Files;
import android.app.Activity;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity
{

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu)
	{
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	public void get_click(View v) throws Exception
	{
		String path = "http://192.168.1.100:8080/ServletTest/Login" + "?username=" + URLEncoder.encode("test", "utf-8") + "&password=" + URLEncoder.encode("123", "utf-8");
		AsyncHttpClient client = new AsyncHttpClient();
		client.get(path, new AsyncHttpResponseHandler()
		{

			@Override
			public void onSuccess(int statusCode, Header[] headers, byte[] responseBody)
			{
				Toast.makeText(MainActivity.this, new String(responseBody), Toast.LENGTH_SHORT).show();
			}

			@Override
			public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error)
			{
				Toast.makeText(MainActivity.this, new String(responseBody + error.getMessage()), Toast.LENGTH_SHORT).show();
			}
		});
	}

	public void post_click(View v) throws Exception
	{
		String path = "http://192.168.1.100:8080/ServletTest/Login";
		String username = "test";
		String password = "123";
		AsyncHttpClient client = new AsyncHttpClient();
		RequestParams params = new RequestParams();
		params.add("username", username);
		params.add("password", password);
		client.post(path, params, new TextHttpResponseHandler()
		{
			@Override
			public void onSuccess(int statusCode, Header[] headers, String responseString)
			{
				Toast.makeText(MainActivity.this, responseString, Toast.LENGTH_SHORT).show();
			}

			@Override
			public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable)
			{
				Toast.makeText(MainActivity.this, responseString, Toast.LENGTH_SHORT).show();
			}
		});
	}

	public void upload_click(View v) throws Exception
	{
		String path = "http://192.168.1.100:8080/ServletTest/Upload";
		AsyncHttpClient client = new AsyncHttpClient();
		RequestParams params = new RequestParams();
		InputStream is = getAssets().open("test.png");
		params.put("file", is,"测试.png");
		client.post(path, params, new AsyncHttpResponseHandler()
		{

			@Override
			public void onSuccess(int statusCode, Header[] headers, byte[] responseBody)
			{
				Toast.makeText(MainActivity.this, "上传成功", Toast.LENGTH_SHORT).show();
			}

			@Override
			public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error)
			{
				Toast.makeText(MainActivity.this, "上传失败", Toast.LENGTH_SHORT).show();
			}
		});
	}
}