volley框架下,使用post方式请求服务器,传递参数和头

/**
* volley框架下,使用post方式请求服务器,传递参数和头
*/
public void postHead() {
String url = "http://api.mefans.hk/token";
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
StringRequest request = new StringRequest(url, new Response.Listener<String>() {

@Override
public void onResponse(String response) {
Log.i("aa", "post请求成功" + response);
Toast.makeText(MainActivity.this, response, Toast.LENGTH_LONG).show();

}
}, new Response.ErrorListener() {

@Override
public void onErrorResponse(VolleyError error) {
Log.i("aa", "post请求失败" + error.toString());
Toast.makeText(MainActivity.this, error.toString(), Toast.LENGTH_LONG).show();

}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
// 请求参数
Map<String, String> map = new HashMap<String, String>();
//new 一个Map  参数放到Map中
map.put("grant_type", "client_credentials");
return map;
}

@Override
public Map<String, String> getHeaders() throws AuthFailureError {
// 请求头

Map<String, String> map = new HashMap<String, String>();
//                map.put("Content-Type","application/x-www-form-urlencoded");
map.put("Authorization ", "basic c6ed4f49ee14ce55554de3cecd1ef307066d8d5202a184f5d28e78df8815b25b");
//new 一个Map这里设置头信息，把头信息放到Map中
return map;
}
};
request.setTag("request");
requestQueue.add(request);
}