Detailed explanation of how to use the Android Volley framework

// 1 Create a request queueRequestQueue requestQueue = ();
 
// 2 Create a requestString url = "/PageSubArea/";
 
StringRequest stringRequest = new StringRequest(url, new <String>() {
  // Correctly receive data callbacks  @Override
  public void onResponse(String s) {
    tv_volley_result.setText(s);
  }
}, new () {// Listen callback after an exception occurs  @Override
  public void onErrorResponse(VolleyError volleyError) {
    tv_volley_result.setText("Loading failed" + volleyError);
  }
});
 
// 3 Add the created request to the request queue(stringRequest);

// 1 Create a request queueRequestQueue requestQueue = ();
 
// 2 Create a post requestString url = "/PageSubArea/";
StringRequest stringRequest = new StringRequest(, url, new <String>() {
  @Override
  public void onResponse(String s) {
    tv_volley_result.setText(s);
  }
}, new () {
  @Override
  public void onErrorResponse(VolleyError volleyError) {
    tv_volley_result.setText("Request failed" + volleyError);
  }
}) {
  @Override
  protected Map<String, String> getParams() throws AuthFailureError {
 
    Map<String, String> map = new HashMap<String, String>();
//            ("value1","param1");
 
    return map;
  }
};
 
// 3 Add post request to queue(stringRequest);

// 1 Create a request queueRequestQueue requestQueue = ();
 
// 2 Create a requestString url = "/PageSubArea/";
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url, null, new <JSONObject>() {
  @Override
  public void onResponse(JSONObject jsonObject) {
    tv_volley_result.setText(());
  }
}, new () {
  @Override
  public void onErrorResponse(VolleyError volleyError) {
    tv_volley_result.setText("Request failed" + volleyError);
  }
});
 
// 3 Add the created request to the request queue(jsonObjectRequest); 

// 1 Create a request queueRequestQueue requestQueue = ();
 
// 2 Request to create an imageString url = "/mg/2016/10/11/160347.";
ImageRequest imageRequest = new ImageRequest(url, new <Bitmap>() {
  @Override
  public void onResponse(Bitmap bitmap) {
    // Correctly receive pictures    iv_volley_result.setImageBitmap(bitmap);
  }
}, 0, 0, .RGB_565, new () {
  @Override
  public void onErrorResponse(VolleyError volleyError) {
    iv_volley_result.setImageResource(.atguigu_logo);
  }
});
 
// 3 Add the request to the request queue(imageRequest);　

// Create a request queueRequestQueue requestQueue = ();
 
ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());
 
// Load the pictureString url = "/mg/2016/10/11/160347.";
 imageListener = (iv_volley_result, .atguigu_logo, .atguigu_logo);
(url, imageListener);

public class BitmapCache implements  {
  private LruCache<String, Bitmap> mCache;

  public BitmapCache() {
    int maxSize = 10 * 1024 * 1024;// 10m
    mCache = new LruCache<String, Bitmap>(maxSize) {
      @Override
      protected int sizeOf(String key, Bitmap bitmap) {
        return () * ();
      }
    };
  }

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

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

<
  android:
  android:layout_width="200dp"
  android:layout_height="200dp"
  android:visibility="gone">
 
</>
 

// Create a request queueRequestQueue requestQueue = ();
 
// Create an ImageloaderImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());
 
// Default picture and exception picture settingsiv_volley_networkimagview.setDefaultImageResId(.atguigu_logo);
iv_volley_networkimagview.setErrorImageResId(.atguigu_logo);
 
// Load the pictureString url = "/mg/2016/10/11/160347.";
iv_volley_networkimagview.setImageUrl(url, imageLoader);