Android Volley框架使用方法详解

// 1 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); // 2 创建一个请求String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api"; StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {  // 正确接收数据回调  @Override  public void onResponse(String s) {    tv_volley_result.setText(s);  }}, new Response.ErrorListener() {// 发生异常后的监听回调  @Override  public void onErrorResponse(VolleyError volleyError) {    tv_volley_result.setText("加载失败" + volleyError);  }}); // 3 将创建的请求添加到请求队列中requestQueue.add(stringRequest);

// 1 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); // 2 创建一个post请求String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api";StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {  @Override  public void onResponse(String s) {    tv_volley_result.setText(s);  }}, new Response.ErrorListener() {  @Override  public void onErrorResponse(VolleyError volleyError) {    tv_volley_result.setText("请求失败" + volleyError);  }}) {  @Override  protected Map<String, String> getParams() throws AuthFailureError {     Map<String, String> map = new HashMap<String, String>();//            map.put("value1","param1");     return map;  }}; // 3 将post请求添加到队列中requestQueue.add(stringRequest);

// 1 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); // 2 创建一个请求String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api";JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url, null, new Response.Listener<JSONObject>() {  @Override  public void onResponse(JSONObject jsonObject) {    tv_volley_result.setText(jsonObject.toString());  }}, new Response.ErrorListener() {  @Override  public void onErrorResponse(VolleyError volleyError) {    tv_volley_result.setText("请求失败" + volleyError);  }}); // 3 将创建的请求添加到请求队列中requestQueue.add(jsonObjectRequest);　　 

// 1 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); // 2 创建一个图片的请求String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";ImageRequest imageRequest = new ImageRequest(url, new Response.Listener<Bitmap>() {  @Override  public void onResponse(Bitmap bitmap) {    // 正确接收到图片    iv_volley_result.setImageBitmap(bitmap);  }}, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {  @Override  public void onErrorResponse(VolleyError volleyError) {    iv_volley_result.setImageResource(R.drawable.atguigu_logo);  }}); // 3 将请求添加到请求队列中requestQueue.add(imageRequest);　

// 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache()); // 加载图片String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";ImageLoader.ImageListener imageListener = imageLoader.getImageListener(iv_volley_result, R.drawable.atguigu_logo, R.drawable.atguigu_logo);imageLoader.get(url, imageListener);　　

public class BitmapCache implements ImageLoader.ImageCache {  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 bitmap.getRowBytes() * bitmap.getHeight();      }    };  }  @Override  public Bitmap getBitmap(String url) {    return mCache.get(url);  }  @Override  public void putBitmap(String url, Bitmap bitmap) {    mCache.put(url, bitmap);  }}

<com.android.volley.toolbox.NetworkImageView  android:id="@+id/iv_volley_networkimagview"  android:layout_width="200dp"  android:layout_height="200dp"  android:visibility="gone"> </com.android.volley.toolbox.NetworkImageView> 

// 创建一个请求队列RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this); // 创建一个ImageloaderImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache()); // 默认图片和异常图片设置iv_volley_networkimagview.setDefaultImageResId(R.drawable.atguigu_logo);iv_volley_networkimagview.setErrorImageResId(R.drawable.atguigu_logo); // 加载图片String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";iv_volley_networkimagview.setImageUrl(url, imageLoader);