Android 網絡提交數據（使用Asynchronous Http Client）

項目主頁及簡單使用方法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發送HTTP請求" />

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

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

</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,"測試.png");
        client.post(path, params, new AsyncHttpResponseHandler()
        {

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

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