android Volly使用

加入網路使用權限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

先在build.gradle裡面加上

implementation 'com.android.volley:volley:1.0.0'

先new一個queue物件

RequestQueue requestQueue;
requestQueue = Volley.newRequestQueue(this);//this是context

在來new一個request物件

StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        //這邊的Response是string，記得轉成json還要用JSONObject
        //這裡也是UIThread
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        error.printStackTrace();
    }
});

如果用的是POST方法，要在下面override getParams()方法

StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {

    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        error.printStackTrace();
    }
}){
    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        Map<String, String> map = new HashMap<String, String>();
        map.put("params1", "value1");
        map.put("params2", "value2");
        return map;
    }
};

最後把request加入到queue中

requestQueue.add(stringRequest);