如何为排球库制作单独的类并从另一个活动中调用所有排球方法并获得响应？

Question

如何创建一个单独的类,其中定义所有关于齐射和另一个活动,我们直接传递URL,CONTEXT和获取响应...

Answer 1

首先创建回调接口以获取Activity中的结果

public interface IResult {
    public void notifySuccess(String requestType,JSONObject response);
    public void notifyError(String requestType,VolleyError error);
}

使用volley函数创建一个单独的类,以通过接口到activity来响应结果

public class VolleyService {

    IResult mResultCallback = null;
    Context mContext;

    VolleyService(IResult resultCallback, Context context){
        mResultCallback = resultCallback;
        mContext = context;
    }


    public void postDataVolley(final String requestType, String url,JSONObject sendObj){
        try {
            RequestQueue queue = Volley.newRequestQueue(mContext);

            JsonObjectRequest jsonObj = new JsonObjectRequest(url,sendObj, new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    if(mResultCallback != null)
                        mResultCallback.notifySuccess(requestType,response);
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    if(mResultCallback != null)
                        mResultCallback.notifyError(requestType,error);
                }
            });

            queue.add(jsonObj);

        }catch(Exception e){

        }
    }

    public void getDataVolley(final String requestType, String url){
        try {
            RequestQueue queue = Volley.newRequestQueue(mContext);

            JsonObjectRequest jsonObj = new JsonObjectRequest(Request.Method.GET, url, new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    if(mResultCallback != null)
                        mResultCallback.notifySuccess(requestType, response);
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    if(mResultCallback != null)
                        mResultCallback.notifyError(requestType, error);
                }
            });

            queue.add(jsonObj);

        }catch(Exception e){

        }
    }
} 

然后将回调接口初始化为主要活动

    mResultCallback = new IResult() {
        @Override
        public void notifySuccess(String requestType,JSONObject response) {
            Log.d(TAG, "Volley requester " + requestType);
            Log.d(TAG, "Volley JSON post" + response);
        }

        @Override
        public void notifyError(String requestType,VolleyError error) {
            Log.d(TAG, "Volley requester " + requestType);
            Log.d(TAG, "Volley JSON post" + "That didn't work!");
        }
    };

现在创建VolleyService类的对象并传递它的上下文和回调接口

mVolleyService = new VolleyService(mResultCallback,this);

现在调用Volley方法发布或获取数据也传递requestType,这是在将结果返回到主活动时识别服务请求者

    mVolleyService.getDataVolley("GETCALL","http://192.168.1.150/datatest/get/data");
    JSONObject sendObj = null;

    try {
        sendObj = new JSONObject("{'Test':'Test'}");
    } catch (JSONException e) {
        e.printStackTrace();
    }
    mVolleyService.postDataVolley("POSTCALL", "http://192.168.1.150/datatest/post/data", sendObj);

最终的主要活动

public class MainActivity extends AppCompatActivity {
    private String TAG = "MainActivity";
    IResult mResultCallback = null;
    VolleyService mVolleyService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initVolleyCallback();
        mVolleyService = new VolleyService(mResultCallback,this);
        mVolleyService.getDataVolley("GETCALL","http://192.168.1.150/datatest/get/data");
        JSONObject sendObj = null;

        try {
            sendObj = new JSONObject("{'Test':'Test'}");
        } catch (JSONException e) {
            e.printStackTrace();
        }
        mVolleyService.postDataVolley("POSTCALL", "http://192.168.1.150/datatest/post/data", sendObj);
    }

    void initVolleyCallback(){
        mResultCallback = new IResult() {
            @Override
            public void notifySuccess(String requestType,JSONObject response) {
                Log.d(TAG, "Volley requester " + requestType);
                Log.d(TAG, "Volley JSON post" + response);
            }

            @Override
            public void notifyError(String requestType,VolleyError error) {
                Log.d(TAG, "Volley requester " + requestType);
                Log.d(TAG, "Volley JSON post" + "That didn't work!");
            }
        };
    }

}

在以下链接中查找整个项目

https://github.com/PatilRohit/VolleyCallback