Android 개발 에 서 는 Volley 라 이브 러 리 를 사용 하여 HTTP 요청 의 인 스 턴 스 튜 토리 얼 을 보 냅 니 다.

git clone https://android.googlesource.com/platform/frameworks/volley

android update project -p . ant jar

<dependency>
  <groupId>com.mcxiaoke.volley</groupId>
  <artifactId>library</artifactId>
  <version>1.0.6</version>
</dependency>

compile 'com.mcxiaoke.volley:library:1.0.6'

public class AppController extends Application {

public static final String TAG = AppController.class
    .getSimpleName();

private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;

private static AppController mInstance;

@Override
public void onCreate() {
  super.onCreate();
  mInstance = this;
}

public static synchronized AppController getInstance() {
  return mInstance;
}

public RequestQueue getRequestQueue() {
  if (mRequestQueue == null) {
    mRequestQueue = Volley.newRequestQueue(getApplicationContext());
  }

  return mRequestQueue;
}

public ImageLoader getImageLoader() {
  getRequestQueue();
  if (mImageLoader == null) {
    mImageLoader = new ImageLoader(this.mRequestQueue,
        new LruBitmapCache());
  }
  return this.mImageLoader;
}

public <T> void addToRequestQueue(Request<T> req, String tag) {
  // set the default tag if tag is empty
  req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
  getRequestQueue().add(req);
}

public <T> void addToRequestQueue(Request<T> req) {
  req.setTag(TAG);
  getRequestQueue().add(req);
}

public void cancelPendingRequests(Object tag) {
  if (mRequestQueue != null) {
    mRequestQueue.cancelAll(tag);
  }
}
}

public class LruBitmapCache extends LruCache<String, Bitmap> implement ImageCache {
  public static int getDefaultLruCacheSize() {
    final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
    final int cacheSize = maxMemory / 8;

    return cacheSize;
  }

  public LruBitmapCache() {
    this(getDefaultLruCacheSize());
  }

  public LruBitmapCache(int sizeInKiloBytes) {
    super(sizeInKiloBytes);
  }

  @Override
  protected int sizeOf(String key, Bitmap value) {
    return value.getRowBytes() * value.getHeight() / 1024;
  }

  @Override
  public Bitmap getBitmap(String url) {
    return get(url);
  }

  @Override
  public void putBitmap(String url, Bitmap bitmap) {
    put(url, bitmap);
  }
}

  private Context mContext;
  private RequestQueue mRequestQueue;
  private StringRequest mStringRequest;

  //   Volley  Post  
  private void volley_post() {
    String url = "http://aplesson.com/wap/api/user.php?action=login";
    mContext = this;
    mRequestQueue = Volley.newRequestQueue(mContext);
    mStringRequest = new StringRequest(Method.POST, url,
        new Response.Listener<String>() {
          @Override
          public void onResponse(String response) {
            System.out.println("    :" + response);
          }
        }, new Response.ErrorListener() {
          @Override
          public void onErrorResponse(VolleyError error) {
            System.out.println("    :" + error.toString());
          }
        }) {
      //     
      @Override
      protected HashMap<String, String> getParams()
          throws AuthFailureError {
        HashMap<String, String> hashMap = new HashMap<String, String>();
        hashMap.put("un", "852041173");
        hashMap.put("pw", "852041173abc");
        return hashMap;
      }

      // Volley         getHeaders（）   ，           HTTP     。（     ）
      public Map<String, String> getHeaders() throws AuthFailureError {
        HashMap<String, String> headers = new HashMap<String, String>();
        headers.put("Accept", "application/json");
        headers.put("Content-Type", "application/json; charset=UTF-8");
        return headers;
      }

    };

    mRequestQueue.add(mStringRequest);

  }

  private JsonObjectRequest mJsonObjectRequest;

  //   Volley  Json    
  private void volley_json() {
    mContext = this;
    String url = "http://aplesson.com/data/101010100.html";
    // 1   RequestQueue  
    mRequestQueue = Volley.newRequestQueue(mContext);
    // 2   JsonObjectRequest  
    mJsonObjectRequest = new JsonObjectRequest(url, null,
        new Response.Listener<JSONObject>() {
          @Override
          public void onResponse(JSONObject response) {
            System.out.println("    :" + response.toString());
          }
        }, new Response.ErrorListener() {
          @Override
          public void onErrorResponse(VolleyError error) {
            System.out.println("    :" + error.toString());
          }
        });

    // 3  JsonObjectRequest   RequestQueue
    mRequestQueue.add(mJsonObjectRequest);

  }

  //   Volley  Get  
  private void volley_get() {
    mContext = this;
    String url = "http://www.aplesson.com/";
    // 1   RequestQueue  
    mRequestQueue = Volley.newRequestQueue(mContext);
    // 2   StringRequest  
    mStringRequest = new StringRequest(url,
        new Response.Listener<String>() {
          @Override
          public void onResponse(String response) {
            System.out.println("    :" + response);
          }
        }, new Response.ErrorListener() {
          @Override
          public void onErrorResponse(VolleyError error) {
            System.out.println("    :" + error.toString());
          }
        });
    // 3  StringRequest   RequestQueue
    mRequestQueue.add(mStringRequest);
  }

 @Override
  public void onStop() {
    for (Request <?> req : mRequestQueue) {
      req.cancel();
    }
  }

 @Override
  protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
    mRequestQueue.cancelAll(this);
  }

 @Override
  protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();

    mRequestQueue.cancelAll( new RequestFilter() {});
    or
    mRequestQueue.cancelAll(new Object());
  }