volley get post json imagerequest imageloader networkimageview 加载网络本地图片

    private void initListener() {
        // get请求
        bt_volley_get.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // 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);
            }
        });

        // post请求
        bt_volley_post.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 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);
            }
        });

        // 获取json数据
        bt_volley_getjson.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 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);
            }
        });

        // imagerequest加载图片
        bt_volley_imagerequest.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 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.setVisibility(View.VISIBLE);
                        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);
            }
        });

        // imageloader加载图片
        bt_volley_imageloader.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 创建一个请求队列
                RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);

                // 创建一个imageloader
//                ImageLoader imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
//                    @Override
//                    public Bitmap getBitmap(String s) {
//                        return null;
//                    }
//
//                    @Override
//                    public void putBitmap(String s, Bitmap bitmap) {
//
//                    }
//                });
                ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());

                // 加载图片
                String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";
                iv_volley_result.setVisibility(View.VISIBLE);
                ImageLoader.ImageListener imageListener = imageLoader.getImageListener(iv_volley_result, R.drawable.atguigu_logo, R.drawable.atguigu_logo);
                imageLoader.get(url, imageListener);
            }
        });

        // networkimageview加载图片
        bt_volley_networkimageview.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 让控件显示
                iv_volley_networkimagview.setVisibility(View.VISIBLE);

                // 创建一个请求队列
                RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);

                // 创建一个Imageloader
                ImageLoader 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);
            }
        });
    }

import android.graphics.Bitmap;
import android.util.LruCache;

import com.android.volley.toolbox.ImageLoader;

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);
    }
}