Volley

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MyApplication

public class MyApplication extends Application {    public static RequestQueue requestQueue;    @Override    public void onCreate() {        super.onCreate();        //实例化RequestQueue对象        requestQueue= Volley.newRequestQueue(getApplicationContext());    }    //返回该实例化对象    public static RequestQueue getRequestQueue(){        return requestQueue;    }}

MyImageCatch

/** * Created by cold on 15/9/3. */public class MyImageCatch implements ImageCache {    public LruCache<String, Bitmap> cache;    public int maxSize = 10 * 1024 * 1024;    public MyImageCatch() {        cache = new LruCache<String, Bitmap>(maxSize) {            @Override            protected int sizeOf(String key, Bitmap value) {                return value.getRowBytes() * value.getHeight();            }        };    }    @Override    public Bitmap getBitmap(String s) {        return cache.get(s);    }    @Override    public void putBitmap(String s, Bitmap bitmap) {        cache.put(s, bitmap);    }}

public class FirstActivity extends AppCompatActivity {    String stringUrl = "http://192.168.0.52:8888/info.php";    String jsonURL = "http://192.168.0.52:8888/json.php";    String imageUrl = "http://192.168.0.52:8888/pic101.jpg";    ImageView imageView;    NetworkImageView networkImageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_first);        imageView = (ImageView) findViewById(R.id.imageView);        networkImageView= (NetworkImageView) findViewById(R.id.networkImageView);    }    //获取图片并缓存,该方法在主线程中使用    public void catchImage2(String urlString) {        //networkImageView为Volley包中的控件        ImageLoader imageLoader = new ImageLoader(MyApplication.getRequestQueue(), new MyImageCatch());        //设置默认显示图片        networkImageView.setDefaultImageResId(R.drawable.loadf);        //获取失败显示的图片        networkImageView.setErrorImageResId(R.drawable.loadfail);        //开始通过URL字符串获取图片        networkImageView.setImageUrl(urlString,imageLoader);    }    //获取图片并缓存,该方法在主线程中使用    public void catchImage1(String urlString) {        ImageLoader imageLoader = new ImageLoader(MyApplication.getRequestQueue(), new MyImageCatch());        //参数为Imageview,默认图片,出错时图片        ImageLoader.ImageListener imageListener=ImageLoader.getImageListener(imageView,R.drawable.loadf,R.drawable.loadfail);        //开始通过URL字符串获取图片        imageLoader.get(urlString,imageListener);    }    //获取图片,可直接在主线程中调用    private void getImage(String urlString) {        ImageRequest imageRequest = new ImageRequest(urlString, new Response.Listener<Bitmap>() {            @Override            public void onResponse(Bitmap bitmap) {                imageView.setImageBitmap(bitmap);            }        }, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError volleyError) {                imageView.setImageResource(R.drawable.loadfail);            }        });        imageRequest.setTag("getImage");        MyApplication.getRequestQueue().add(imageRequest);    }    private void post_methord() {        volley_postString();        volley_postJSON();        MyApplication.getRequestQueue().cancelAll("setTag设置的标签");    }    //post方式获取json(不可用),可使用获取字符串的post方法    private void volley_postJSON() {        HashMap<String, String> hashMap = new HashMap<String, String>();        hashMap.put("info", "volley_postJSON");        JSONObject jsonObject = new JSONObject(hashMap);        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, jsonURL, jsonObject, new Response.Listener<JSONObject>() {            @Override            public void onResponse(JSONObject jsonObject) {                Log.e("volley_postJSON_suce", jsonObject.toString());            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError volleyError) {                Log.e("volley_postJSON_fail", volleyError.toString());            }        });        jsonObjectRequest.setTag("volley_postJSON");        MyApplication.getRequestQueue().add(jsonObjectRequest);    }    //post方式获取字符串    private void volley_postString() {        StringRequest postStringRequest = new StringRequest(Request.Method.POST, stringUrl, new Response.Listener<String>() {            @Override            public void onResponse(String string) {                Log.e("volley_postString_suce", string);            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError volleyError) {                Log.e("volley_postString_fail", volleyError.toString());            }        }) {            @Override            protected Map<String, String> getParams() throws AuthFailureError {                Map<String, String> map = new HashMap<String, String>();                map.put("info", "volley_postString");                return map;            }        };        postStringRequest.setTag("volley_postString");        MyApplication.getRequestQueue().add(postStringRequest);    }    private void get_methord() {        voller_getString();        volley_getJSON();    }    //get获取json    private void volley_getJSON() {        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, jsonURL + "?info=volley_getJSON", null, new Response.Listener() {            @Override            public void onResponse(Object o) {                Log.e("volley_getJSON_sucess", o.toString());            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError volleyError) {                Log.e("volley_getJSON_error", volleyError.toString());            }        });        jsonObjectRequest.setTag("volley_getJSON");        MyApplication.getRequestQueue().add(jsonObjectRequest);    }    //get获取字符串    private void voller_getString() {        StringRequest stringRequest = new StringRequest(Request.Method.GET, stringUrl + "?info=see",                new Response.Listener<String>() {                    @Override                    public void onResponse(String string) {                        Toast.makeText(FirstActivity.this, string, Toast.LENGTH_SHORT).show();                        Log.e("voller_getString_sucess", string);                    }                }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError string) {                Toast.makeText(FirstActivity.this, string.toString(), Toast.LENGTH_SHORT).show();                Log.e("voller_getString_fail", string.toString());            }        });        //设置Tag标记请求,请求队列调用.cancelAll("voller_getString")取消下面的请求        stringRequest.setTag("voller_getString");        MyApplication.getRequestQueue().add(stringRequest);    }}

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