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/

頁面佈局就不復制了，把主要的Activity記錄下來，供自己以後使用：

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();
            }
        });
    }
}

調試測試的時候可以使用tomvat服務器試驗下，開始自己不會寫服務器端的代碼，偶然間發現toncat自帶的例子裏面有測試post和get方法提交數據的，一般的地址爲：http://10.3.19.27:8080/examples/servlets/servlet/SessionExample前面的改爲自己的本機的服務器地址即可