volley框架的使用

来源：互联网发布：自制相册软件下载编辑：程序博客网时间：2024/06/10 02:01
最近在自己做一个小项目，用到了volley框架，它适用于频繁、小数据量的请求
简单总结一下使用方式：包括get、post，以及三种图片请求方式：
import android.app.Activity;import android.graphics.Bitmap;import android.net.Uri;import android.support.v4.util.LruCache;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ImageButton;import android.widget.ImageView;import com.android.volley.AuthFailureError;import com.android.volley.Request;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.ImageLoader;import com.android.volley.toolbox.ImageRequest;import com.android.volley.toolbox.JsonObjectRequest;import com.android.volley.toolbox.JsonRequest;import com.android.volley.toolbox.NetworkImageView;import com.android.volley.toolbox.StringRequest;import com.android.volley.toolbox.Volley;import com.google.android.gms.appindexing.Action;import com.google.android.gms.appindexing.AppIndex;import com.google.android.gms.appindexing.Thing;import com.google.android.gms.common.api.GoogleApiClient;import org.json.JSONObject;import java.util.HashMap;import java.util.Map;public class MainActivity extends Activity {    RequestQueue queue;    /**     * ATTENTION: This was auto-generated to implement the App Indexing API.     * See https://g.co/AppIndexing/AndroidStudio for more information.     */    private GoogleApiClient client;    private ImageView imageView;    private NetworkImageView networkImageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        queue = Volley.newRequestQueue(MainActivity.this);//创建请求管理队列        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();        imageView = (ImageView) findViewById(R.id.imageView);        networkImageView = (NetworkImageView) findViewById(R.id.netWorkImageView);        networkImageView.setDefaultImageResId(R.mipmap.ic_launcher);        networkImageView.setErrorImageResId(R.mipmap.ic_launcher);    }    private void networkImage(View view){ //获取网络    String url = "";        ImageLoader imageLoader = new ImageLoader(queue, new ImageLoader.ImageCache() {            int maxSize=1024*1024*4;            LruCache<String,Bitmap> cache=new LruCache<String,Bitmap>(maxSize){                @Override                protected int sizeOf(String key, Bitmap value) {                    return value.getRowBytes()*value.getHeight();                }            };            @Override            public Bitmap getBitmap(String url) {                return cache.get(url);            }            @Override            public void putBitmap(String url, Bitmap bitmap) {                cache.put(url,bitmap);            }        });        networkImageView.setImageUrl(url,imageLoader);    }    private void imageLoader(View view) {        ImageLoader imageLoader = new ImageLoader(queue, new ImageLoader.ImageCache() {            int maxSize = 1024*1024*400;            LruCache<String ,Bitmap>  cache = new LruCache<String ,Bitmap>(maxSize);            protected int sizeOf(String key,Bitmap value) {                return value.getRowBytes()*value.getHeight();            }            @Override            public Bitmap getBitmap(String url) {         //缓存处理                return cache.get(url);            }            @Override            public void putBitmap(String url, Bitmap bitmap) {                //把 要缓存的图片加到集合中                cache.put(url,bitmap);            }        });        ImageLoader.ImageListener imageListener = ImageLoader.getImageListener(                imageView,R.mipmap.ic_launcher,R.mipmap.ic_launcher);//成功、默认、失败        String url = "";        imageLoader.get(url,imageListener,100,100);    }    //根据url获取图片    private void getImage(View view) {        String url = "";//请求地址        ImageRequest imageRequest = new ImageRequest(url, new Response.Listener<Bitmap>() {            @Override            public void onResponse(Bitmap response) {            }        }, 0, 0,//压缩尺寸                Bitmap.Config.ARGB_8888, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {            }        });        queue.add(imageRequest);    }    //获得json形式数据    private void jsonObject(View view) {        String url = "";//请求地址        JsonRequest jsonRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {            @Override            public void onResponse(JSONObject response) {            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {            }        });        queue.add(jsonRequest);//添加到请求队列    }    //post方式    private void post(View view) {        String url = "";//请求地址        StringRequest request = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {            @Override            public void onResponse(String response) {//成功            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {//失败            }        }){            @Override            protected Map<String, String> getParams() throws AuthFailureError {//匿名类                String name = "";                String pwd = "";                String rname = "";                String email = "";                Map<String,String>  map = new HashMap<>();//需要传递的参数                map.put("name",name);                map.put("name",pwd);                map.put("name",rname);                map.put("name",email);                return map;            }        };            queue.add(request);//添加到请求队列    }    //get方式    private void get(View view) {        String url = "";//请求地址        StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {            @Override            public void onResponse(String response) {            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {            }        });        queue.add(stringRequest);//添加到请求队列    }}
需要添加依赖、或者导入volley框架的jar包、在配置文件中添加网络访问权限；
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