关于使用Volley下载的json字符串无法显示中文的问题(已解决)

class MyStringRequest extends StringRequest {
public MyStringRequest(String url, Response.Listener<String> listener, Response.ErrorListener errorListener) {
this(Method.GET, url, listener, errorListener);
}

public MyStringRequest(int method, String url, Response.Listener<String> listener,
Response.ErrorListener errorListener) {
super(method, url, listener, errorListener);
}

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String str = null;

try {
str = new String(response.data, "utf-8");
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}

return Response.success(str, HttpHeaderParser.parseCacheHeaders(response));
}
}