什么是Volley
Google I/O 2013上,Volley发布了。Volley是Android平台上的网络通信库,能使网络通信更快,更简单,更健壮。
这是Volley名称的由来: a burst or emission of many things or a large amount at once
特点
支持JSON,图片,二进制文本,内存和磁盘缓存,强力的自定义能力,debug和跟踪工具
如何获得?
我在 云盘 放了编译好的 http://yunpan.cn/cg7S8awftBsmp 访问密码 b1bf
怎么用?
- 构建一个“请求队列“RequestQueue
- 构建请求Request,支持 StringRequest,JsonRequest,并可以自定义Request
- 构建 回调监听器 ,它将在请求处理完成后被调用。
- 将请求添加到队列
演示代码
简单的http方式的GET 演示:
public class SimpleGetActivity extends Activity { RequestQueue mRequestQueue; TextView txt_msg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_get); txt_msg = (TextView) findViewById(R.id.txt_msg); mRequestQueue = Volley.newRequestQueue(this); } public void btn1OnClick(View v) { String url = "http://www.baidu.com"; StringRequest req = new StringRequest(Method.GET, url, responseListener, mErrorListener); mRequestQueue.add(req); } Listener<String> responseListener =new Listener<String>() { @Override public void onResponse(String str1) { txt_msg.setText(str1); } }; ErrorListener mErrorListener = new ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Toast.makeText(getBaseContext(), volleyError.getMessage(), 0).show(); } }; }
使用POST方式发送参数
public class ParasPostActivity extends Activity { RequestQueue mRequestQueue; TextView txt_msg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_paras_post); txt_msg = (TextView) findViewById(R.id.txt_msg); mRequestQueue = Volley.newRequestQueue(this); } public void btn1OnClick(View v) { String url = Constants.URL_FOR_DEMO1; StringRequest req = new StringRequest(Method.POST, url, responseListener, mErrorListener){ @Override protected Map<String, String> getParams() throws AuthFailureError { return new ApiParams().with("key1", "v1").with("key2", "v2"); } }; mRequestQueue.add(req); } Listener<String> responseListener =new Listener<String>() { @Override public void onResponse(String str1) { txt_msg.setText(str1); } }; ErrorListener mErrorListener = new ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Toast.makeText(getBaseContext(), volleyError.getMessage(), 0).show(); } }; }
注意传参时,是通过匿名类实现的,重载了getParams 方法
参考:
http://blog.csdn.net/t12x3456/article/details/9221611
me.storm.volley 示例