Java 接口实现错误?
我对安卓系统的经验较少,每当用户收到firebase的推送通知时,我都会尝试使用Volley库在后台下载一个文件 我遵循了这个教程 我的firebase通知接收器类看起来像Java 接口实现错误?,java,android,Java,Android,我对安卓系统的经验较少,每当用户收到firebase的推送通知时,我都会尝试使用Volley库在后台下载一个文件 我遵循了这个教程 我的firebase通知接收器类看起来像 public class MyFirebaseMessagingService extends FirebaseMessagingService implements Response.Listener<byte[]>, Response.ErrorListener { 我在传递的上下文中遇到错误 任何帮助
public class MyFirebaseMessagingService extends FirebaseMessagingService implements Response.Listener<byte[]>, Response.ErrorListener {
我在传递的上下文中遇到错误
任何帮助对我来说都是非常有用的
预期参数为截击侦听器、错误侦听器,并且您正在传递android上下文
预期参数为截击侦听器、错误侦听器,并且您正在传递android上下文
很明显,正如您从图像中看到的,您传递了错误的上下文。您需要传递volley.Response.Listener而不是adnroid.content.Context,但我已经在我的类中实现了它。。。实现Response.Listener,Response.errorListener将
上下文
替换为此
谢谢@shine_joseph,成功了!很明显,正如您从图像中看到的,您传递了错误的上下文。您需要传递volley.Response.Listener而不是adnroid.content.Context,但我已经在我的类中实现了它。。。实现Response.Listener,Response.errorListener将上下文
替换为此
谢谢@shine_joseph,成功了!如果没有解释,您的正确答案将失去其价值。附加解释。。。thnaks@davidxxx如果没有解释,您的正确答案将失去其价值。附加解释。。。thnaks@davidxxx
public class InputStreamVolleyRequest extends Request<byte[]> {
private final Response.Listener<byte[]> mListener;
private Map<String, String> mParams;
//create a static map for directly accessing headers
public Map<String, String> responseHeaders;
public InputStreamVolleyRequest(int post, String mUrl, Response.Listener<byte[]> listener,
Response.ErrorListener errorListener, HashMap<String, String> params) {
// TODO Auto-generated constructor stub
super(post, mUrl, errorListener);
// this request would never use cache since you are fetching the file content from server
setShouldCache(false);
mListener = listener;
mParams = params;
}
@Override
protected Map<String, String> getParams()
throws com.android.volley.AuthFailureError {
return mParams;
}
;
@Override
protected void deliverResponse(byte[] response) {
mListener.onResponse(response);
}
@Override
protected Response<byte[]> parseNetworkResponse(NetworkResponse response) {
//Initialise local responseHeaders map with response headers received
responseHeaders = response.headers;
//Pass the response data here
return Response.success(response.data, HttpHeaderParser.parseCacheHeaders(response));
}
}
request = new InputStreamVolleyRequest(Request.Method.GET, urltohit, context, context, null);
request = new InputStreamVolleyRequest(Request.Method.GET, urltohit, this, this, null);