Android 网络请求库volley的封装，让请求更方便 _android

仰天大笑出门去，我辈岂是蓬蒿人。这篇文章主要讲述Android 网络请求库volley的封装，让请求更方便相关的知识，希望能为你提供帮助。
首先封装一下volley 请求

public class CustomRequest extends StringRequest {

private static final String TAG = CustomRequest.class.getSimpleName();
private String mBody;
private Map< String, String> mHeaders = new HashMap< > ();

public CustomRequest(int method, String url, Response.Listener< String> listener, Response.ErrorListener errorListener) {
super(method, url, listener, errorListener);
//设置消息头
mHeaders.put("按需求写自己的内容", "按需求写自己的内容")；
mHeaders.put("accetp"，"application/json");
//可以有很多个

}

@Override
public Map< String, String> getHeaders() throws AuthFailureError {
Log.i(TAG, mHeaders.toString());
return mHeaders;
}

@Override
public byte[] getBody() throws AuthFailureError {
try {
return TextUtils.isEmpty(mBody) ? super.getBody() : mBody.getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
//Log.e(TAG, "getBody", e);
}
return super.getBody();
}

public void setBody(String body) {
mBody = body;
}

public Map< String, String> getResonseHeaders() {
return super.getResonseHeaders();
}

}

其次我们还要封装一个请求类

public class CustomRequester< Resp extends Response> {
private static final String TAG = "CustomRequester";
private final Context mContext;
private final Class< Resp> mClazz;
private final com.android.volley.Response.ErrorListener mErrorListener = new com.android.volley.Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
int statusCode = volleyError == null ? 0 : volleyError.networkResponse == null ? 0 : volleyError.networkResponse.statusCode;
Log.e(TAG, "statusCode: " + statusCode, volleyError);
if (mTag == null) {
return;
}
onError();
if (statusCode == 0) {
onNetError();
} else if (statusCode == 401) {//不同的请求码做不同的处理
} else if (statusCode == 404) {
} else if (statusCode == 400) {
} else if (statusCode == 403) {

} else {
String json = volleyError.networkResponse.data =https://www.songbingjia.com/android/= null ?"" : new String(volleyError.networkResponse.data);
if (!TextUtils.isEmpty(json)) {
if (mContext instanceof Activity) {
Log.i(TAG, "json " + json);
try {
json = JSON.parseObject(json, Response.class).getMessage();
//onError(json);
} catch (Exception e) {
onError(json + "not json format!");
}
}
}
}
}
};

private final com.android.volley.Response.Listener< String> mResponseListener = new com.android.volley.Response.Listener< String> () {
@Override
public void onResponse(String json) {
Log.i(TAG, "json " + json);
CustomRequester.this.onResponse(json);
if (mTag == null) {
return;
}
try {
final Resp resp = JSON.parseObject(json, mClazz);
if (resp != null) {
onSuccess(resp); //请求成功这里直接返回解析好的 model
}
} catch (Exception e) {
Log.e(TAG, "onResponse", e);
}
}
};
private String mTag;

public void onResponse(String json) {
}

public void onSuccess(Resp resp) {
}

public void onError() {
}

public void onNoFoundError() {
if (mContext instanceof Activity) {
}
}

public CustomRequester(Class< Resp> clazz) {
mContext = null;
mClazz = clazz;
}

public CustomRequester(Context context, Class< Resp> clazz) {
mContext = context;
mClazz = clazz;
}

public void cancelAll() {
final String tag = mTag;
mTag = null;
if (!TextUtils.isEmpty(tag)) {
MyApplication.getInstance().getRequestQueue().cancelAll(tag);
}
}

//Post 请求
public CustomRequest post(String url, int page, String body) {
final RequestQueue queue = MyApplication.getInstance().getRequestQueue();
final CustomRequest request = new CustomRequest(Request.Method.POST, url, mResponseListener, mErrorListener);
try {
final Map< String, String> header = request.getHeaders();
header.remove("Range");
if (page > 0) {
header.put("Range", String.format("page:%1$d,max:10", page));
}
} catch (AuthFailureError authFailureError) {
authFailureError.printStackTrace();
}
mTag = "post," + url + "," + body;
request.setTag(mTag);

Log.i(TAG, mTag);
request.setBody(body);
queue.add(request);
return request;
}
//Get 请求
public CustomRequest get(String url, int page, String body) {
final RequestQueue queue = YZApplication.getInstance().getRequestQueue();
final CustomRequest request = new CustomRequest(Request.Method.GET, url, mResponseListener, mErrorListener);
try {
final Map< String, String> header = request.getHeaders();
header.remove("Range");
if (page > 0) {
header.put("Range", String.format("page:%1$d,max:10", page));
}
} catch (AuthFailureError authFailureError) {
authFailureError.printStackTrace();
}
mTag = "post," + url + "," + body;
request.setTag(mTag);

Log.i(TAG, mTag);
request.setBody(body);
queue.add(request);
return request;
}
　
//Put 请求
public CustomRequest put(String url, int page, String body) {
final RequestQueue queue = MyApplication.getInstance().getRequestQueue();
final CustomRequest request = new CustomRequest(Request.Method.PUT, url, mResponseListener, mErrorListener);

try {
final Map< String, String> header = request.getHeaders();
header.remove("Range");
if (page > 0) {
header.put("Range", String.format("page:%1$d,max:10", page));
}
} catch (AuthFailureError authFailureError) {
authFailureError.printStackTrace();
}
mTag = "put," + url + "," + body;
request.setTag(mTag);
request.setBody(body);
queue.add(request);
return request;
}
//Delete 请求
public CustomRequest delete(String url, int page, String body) {
final RequestQueue queue = MyApplication.getInstance().getRequestQueue();
final CustomRequest request = new CustomRequest(Request.Method.DELETE, url, mResponseListener, mErrorListener);
try {
final Map< String, String> header = request.getHeaders();
header.remove("Range");
if (page > 0) {
header.put("Range", String.format("page:%1$d,max:10", page));
}
} catch (AuthFailureError authFailureError) {
authFailureError.printStackTrace();
}
mTag = "delete," + url + "," + body;
request.setTag(mTag);
request.setBody(body);
queue.add(request);
return request;
}

}